六级阅读理解模拟题和答案
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篇1:六级阅读理解模拟题和答案
六级阅读理解模拟题和答案
Passage 1
Large companies need a way to reach the savings of the public at large.The same problem,on a smaller scale,faces practically every company trying to develop new products and create new jobs.There can be little prospect of raising the sort of sums needed from friends and people we know, and while banks may agree to provide short-term finance, they are generally unwilling to provide money on a permanent basis for long-term projects. So companies turn to public, inviting people to lend them money, or take a share in the business in exchange for a share in future profits. This they do by issuing stocks and shares in the business through The Stock Exchange. By doing so they can put into circulation the savings of individuals and institution, both at home and overseas.When the saver needs his money back,he does not have to go to the company wiht whom he originally placed it.Instead, he sells his shares through a stockbroker(证券经纪人)to some other saver who is seeking to invest his money.
Many of the services needed both by industry and by each of us are provided by the Government or by local authorities. Without hospitals, roads, electricity, telephones, railways, this country could not function.All these require continuous spending on new equipment and new development if they are to serve us properly, requiring more money than is raised through taxes alone. The government,local authorities, and nationalized industries therefore frequently needed to borrow money to finance major capital spending,and they,too,come to The Stock Exchange.
There is hardly a man or woman in this country whose job or whose standard of living does not depend on the ability of his or her emplorers to raise money to finance new development. In one way or another this new money must come from the savings of the country. The Stock
篇2:英语六级考试阅读理解模拟题及答案
文章精要
文章指出,目前美国大学在录取新生时,仍然比较看重分数。在一些学校里由 于奖学金政策的执行,学生的分数迅速攀升。考试的拥护者指出,考试有必要存在, 因为它给学生提供了展示自我的平台,而这也无疑会给学生带来巨大的压力。
答案解析
1. E 本题的出题点在E段的最后一句话,属于数字题。从原文可以看出,申请 者的人数为47,317,而获得4.0或者4.0以上分数者的人数接近23,000,由此 可知比例接近50%。
2. F 本题是F段的总结。原文提到,对学生的选拔最为严格的学校也越来越难 以参与到降低标准考试的影响的活动中来,也就是说,这些学校很难降低 标准考试的影响。
3. K 本题的出题点在K段的最后两句话,属于数字题。More than 30 years ago可推测应该是上世纪七八十年代,对应原文的1975年;从原文可以看出,在 大一新生中,在高中取得A或者更好成绩的人数差不多是总人数的 !%%,而在1975年时此比例减半,大约为11.5%。
4. H 本题的出题点在H段。原文提到最近标准考试有一些负面影响,许多学校已经停止要求用考试分数来评判学生。题干的negative effects转述了原文 的bad publicity。
5. D 本题是对D段前两句话的同义转述。原文提到:有些人把Zalasky的努力这种现象称为“分数膨胀”,暗示他的这种进步不值得接受,而其他人认为那 些学生真正赢得了好的评价,题干中的win the praise for him同义转述了原 文中的earning their better marks。
6. B 本题的出题点在B段的第一句和第五句。原文提到even Zalasky is nervous about his prospects。接着在第五句中提到了原因:It’s that so many of his classmates are so good.由此可知题目是这两句的总结。
7. P 本题的出题点在P段的第二句话。题目中的Some colleges替换原文中的colleges like his;题目中的conquered和原文中的overcome属于同义词转换; 原文中的are more interested in换成了另一种说法would like to admit;原文中 的robots是一种比喻的说法,比喻那些完美得像机器人一样的学生。
8. N 本题的出题点在N段的最后一句话。题目中的In the next year替换原文中的Next year;题目中的a series of替换原文中的a range of;题目中的avoiding paying too much attention to替换原文中的no longer giving…weight to。
9. S 本题考查人物的观点。S段后半部分指出,Zalasky表示,学校的想法是,如果你没有得到全A的成绩,你就没有学得很好,学生们为了得到A都有很 大的压力。文章最后提到,Hicks将Zalasky所在的学校和纽约洋基队的情 况作了比较,“如果他们不能取胜,那么他们就失败了”,即对于学生来说 不能得到A就等于失败。
10. Q本题出题点在Q段的第一句话。题目表达意思与原句表述一致,题目用非限定性定语从句解释说明原文中破折号之后的内容;题目中的more and more schools和原文中的a growing number of schools属于同义转述。
篇3:英语六级阅读理解强化模拟题及答案
Reading Comprehension (Skimming and Scanning) (15 minutes)
Directions: In this part, you will have 15 minutes to go over the passage quickly and answer the questions on Answer sheet 1. For questions 1-4, mark
Y (for YES) if the statement agrees with the information given in the passage;
N (for NO) if the statement contradicts the information given in the passage;
NG (for NOT GIVEN) if the information is not given in the passage.
For questions 5-10, complete the sentences with the information given in the passage.
April Fools' Special: History's Hoaxes
Happy April Fools' Day. To mark the occasion, National Geographic News has compiled a list of some of the more memorable hoaxes in recent history. They are the lies, darned(可恨的) lies, and whoppers(弥天大谎)that have been perpetrated on the gullible(易受骗的)and unsuspecting to fulfill that age-old desire held by some to put the joke on others.
Internet Hoaxes
The Internet has given birth to a proliferation(增殖)of hoaxes. E-mail inboxes are bombarded on an almost daily basis with messages warning of terrible computer viruses that cause users to delete benign(良性)chunks of data from their hard drives, or of credit card scams that entice the naive to give all their personal information, including passwords and bank account details, to identity thieves. Other e-mails give rise to wry(歪曲的)chuckles, which is where this list begins.
Ban Dihydrogen Monoxide(一氧化二氢)
City officials in Aliso Viejo, California, were so concerned about the dangers of dihydrogen monoxide that they scheduled a vote last month on whether to ban foam(泡沫)cups from city-sponsored events after they learned the chemical was used in foam-cup production.
Officials called off the vote after learning that dihydrogen monoxide is the scientific term for water.
“It's embarrassing,” city manager David J. Norman told the Associated Press. “We had a paralegal(律师助手)who did bad research.”
Indeed, the paralegal had fallen victim to an official-looking Web site touting the dangers of dihydrogen monoxide. An e-mail originally authored in 1990 by Eric Lechner, then a graduate student at the University of California, Santa Cruz, claimed that dihydrogen monoxide “is used as an industrial solvent and coolant, and is used in the production of Styrofoam(聚苯乙烯泡沫塑料).”
Other dangers pranksters(爱开玩笑的人)associated with the chemical included accelerated corrosion and rusting, severe burns, and death from inhalation.
Versions of the e-mail continue to circulate today, and several Web sites, including that of the Coalition to Ban DHMO, warn, tongue-in-cheek, of water's dangers.
Alabama Changes Value of Pi
The April newsletter put out by New Mexicans for science and Reason contains an article titled “Alabama Legislature Lays Siege to Pi”. It was penned by April Holiday of the Associmated Press (sic) and told the story of how the Alabama state legislature voted to change the value of the mathematical constant Pi from 3.14159 to the round number of 3.
The ersatz(假的)news story was written by Los Alamos National Laboratory physicist Mark Boslough to parody(滑稽地模仿)legislative and school board attacks on the teaching of evolution in New Mexico.
At Boslough's suggestion, Dave Thomas, the president of New Mexicans for science and Reason, posted the article in its entirety to the Internet newsgroup Talk. Origins on April 1. (The newsgroup hosts a lively debate on creation vs. evolution.) Later that evening Thomas posted a full confession to the hoax. He thought he had put all rumors to bed.
But to Thomas's surprise, however, several newsgroup readers forwarded the article to friends and posted it on other newsgroups.
When Thomas checked in on the story a few weeks later, he was surprised to learn that it had spread like wildfire. The telltale signs of the article's satirical intent, such as the April 1 date and misspelled “Associmated Press” dateline, had been replaced or deleted.
Alabama legislators were bombarded with calls protesting the law. The legislators explained that the news was a hoax. There was not and never had been such a law.
TV and Newspaper Hoaxes
Before the advent of the Internet, and even today, traditional media outlets such as newspapers, radio, and television, have sometimes hoaxed their audiences. The deceptions run the gamut from purported natural disasters to wishful news.
Swiss Spaghetti (意大利式细面条) Harvest
Alex Boese, curator of the Museum of Hoaxes, a regularly updated Web site that also appeared in book form in November , said one of his favorite hoaxes remains one perpetrated by the British Broadcasting Company.
On April 1, 1957, the BBC aired a report on the television news show Panorama about the bumper spaghetti harvest in southern Switzerland.
Viewers watched Swiss farmers pull pasta off spaghetti trees as the show's anchor, Richard Dimbleby, attributed the bountiful harvest to the mild winter and the disappearance of the spaghetti weevil.
The broadcaster detailed the ins and outs of the life of the spaghetti farmer and anticipated questions about how spaghetti grows on trees. Thousands of people believed the report and called the BBC to inquire about growing their own spaghetti trees, to which the BBC replied, “Place a sprig of spaghetti in a tin of tomato sauce and hope for the best.”
“It was a great satirical effect about British society,” Boese said. “British society really was like that at that time. The British have a tendency to be a bit insulated(绝缘的) and do not know that much about the rest of Europe.”
Taco Liberty Bell
On April 1, , readers in five major U.S. cities opened their newspapers to learn from a full page announcement that the Taco Bell Corporation had purchased the Liberty Bell from the U.S. government. The announcement reported that the company was relocating the historic bell from Philadelphia, Pennsylvania, to Irvine, California. The move, the corporation said in the advertisement, was part of an “effort to help the national debt”.
Hundreds of other newspapers and television shows ran stories related to the press release on the matter put out by Taco Bell's public relations firm, PainePR. Outraged citizens called the Liberty Bell National Historic Park in Philadelphia to express their disgust. A few hours later the public relations firm released another press announcement stating that the stunt was a hoax.
White House press secretary Mike McCurry got into the act when he remarked that the government would also be “selling the Lincoln Memorial to Ford Motor Company and renaming it the Lincoln-Mercury Memorial”.
Crop Circles
Strange, circular formations began to appear in the fields of southern England in the mid-1970s, bringing busloads of curious onlookers, media representatives, and believers in the paranormal out to the countryside for a look.
A sometimes vitriolic(讽刺的)debate on their origins has since ensued(跟着发生), and the curious formations have spread around the world, becoming more and more elaborate as the years go by.
Some people consider the crop formations to be the greatest works of modern art to emerge from the 20th century, while others are convinced they are signs of extraterrestrial communications or landing sites of UFOs.
The debate rages even today, although in 1991 Doug Bower and Dave Chorley, two elderly men from Wiltshire County, came forward and claimed responsibility for the crop circles that appeared there over the preceding 20 years. The pair made the circles by pushing down nearly ripe crops with a wooden plank suspended from a rope.
Moon Landing―a Hoax?
Ever since NASA sent astronauts to the moon between 1969 and 1972, skeptics have questioned whether the Apollo missions were real or simply a ploy to one-up(领先)the Soviet Union during the Cold War. The debate resurfaced and reached crescendo levels in February , when For television aired a program called Conspiracy Theory: Did We Land on the Moon?
Guests on the show argued that NASA did not have the technology to land on the moon. Anxious to win the space race, NASA acted out the Apollo program in movie studios, they said. The conspiracy theorists pointed out that the pictures transmitted from the moon do not include stars and that the flag the Americans planted on the moon is waving, even though there is though to be no breeze on the moon.
NASA quickly refuted these claims in a series of press releases, stating that any photographer would know it is difficult to capture something very bright and very dim on the same piece of film. Since the photographers wanted to capture the astronauts striding across the lunar surface in their sunlit space suits, the background stars were too faint to see.
As for the flag, NASA said that the astronauts were turning it back and forth to get in firmly planted in the lunar soil, which made it wave.
1. Some people have the age-old desire to put the joke on others.
2. According to the passage, the only form of Internet hoaxes is e-mail hoax.
3. Dihydrogen monoxide is a very dangerous chemical, which is often used as an industrial solvent.
4. Dihydrogen monoxide can accelerate corrosion and rusting, and cause sever burns and even death from inhalation.
5. The reason why the ersatz news that Alabama changed the value of Pi spread wildly was that ________ forwarded the article to friends and posted it on other newsgroups.
6. Traditional media outlets such as ________ may still hoax their audiences nowadays.
7. According to Boese, many people believed the report of Swiss spaghetti harvest because the British did not know ________.
8. According to a hoax announcement, the Taco Bell Corporation bough the Liberty Bell and moved it to Irvine to help ________.
9. The crop circles were thought to be the greatest works of modern art, the signs of ________ or landing sites of UFOs.
10. Some people thought that NASA acted out the Apollo program in movie studios partially because the pictures transmitted from the moon do not include ________.
篇4:英语六级考试阅读理解模拟题及答案
Words: 1,372
Higher Grades Challenge College Application Process
A) Josh Zalasky should be the kind of college applicant with little to worry about. The high school senior is taking three Advanced Placement courses. Outside the classroom, he,s involved in mock trial, two Jewish youth groups and has a job with a restaurant chain. He,s a National Merit semifinalist and scored in the top ? percent of all students who take the ACT.
B) But in the increasingly frenzied world of college admissions, even Zalasky is nervous about his prospects. He doubts he#ll get into the University of Wisconsin, a top choice. The reason: his grades. It$s not that they%re bad. It&s that so many of his classmates are so good. Zalasky’s GPA is nearly an A minus, and yet he ranks only about in the middle of his senior class of 543 at Edina High School outside Minneapolis, Minnesota. That means he will have to find other ways to stand out.
C) “It’s extremely difficult,” he said. “I spent all summer writing my essay. We even hired a private tutor to make sure that essay was the best it can be. But even with that, it’s like I*m just kind of leveling the playing field.” Last year, he even considered transferring out of his highly competitive public school, to some place where his grades would look better.
D) Some call the phenomenon that Zalasky’s fighting “grade inflation”―implying the boost is undeserved. Others say students are truly earning their better marks. Regardless, it’s a trend that’s been building for years and may only be accelerating: many students are getting very good grades. So many, in fact, it is getting harder and harder for colleges to use grades as a measuring stick for applicants.
E) Extra credit for AP courses, parental lobbying and genuine hard work by the most competitive students have combined to shatter any semblance of a Bell curve, one in which A,s are reserved only for the very best. For example, of the 47,317 applications the University of California, Los Angeles, received for this fall’s freshman class, nearly 23,000 had GPAs of 4.0 or above.
F) That’s also making it harder for the most selective colleges―who often call grades the single most important factor in admissions―to join in a growing movement to lessen the influence of standardized tests.
G) “We,re seeing 30, 40 valedictorians at a high school because they don,t want to create these distinctions between students,” said Jess Lord, dean of admission and financial aid at Haverford College in Pennsylvania. “ If we don’t have enough information, there’s a chance we’ll become more heavily reliant on test scores, and that’s a real negative to me.”
H) Standardized tests have endured a heap of bad publicity lately, with the SAT raising anger about its expanded length and recent scoring problems. A number of schools have stopped requiring test scores, to much fanfare.
I) But lost in the developments is the fact that none of the most selective colleges have dropped the tests. In fact, a national survey shows overall reliance on test scores is higher in admissions than it was a decade ago. “It’s the only thing we have to evaluate students that will help us tell how they compare to each other,” said Lee Stetson, dean of admissions at the University of Pennsylvania.
J) Grade inflation is hard to measure, and experts,caution numbers are often misleading because standards and scales vary so widely. Different practices of “weighting” GPAs for AP work also play havoc. Still, the trend seems to be showing itself in a variety of ways.
K) The average high school GPA increased from 2.68 to 2.94 between 1990 and , according to a federal study. Almost 23 percent of college freshmen in reported their average grade in high school was an A or better, according to a national survey by UCLA’s Higher Education Research Institute. In 1975, the percentage was about half that.
L) GPAs reported by students on surveys when they take the SAT and ACT exams have also risen―and faster than their scores on those tests. That suggests their classroom grades aren’t rising just because students are getting smarter. Not surprisingly, the test-owners say grade inflation shows why testing should be kept: it gives all students an equal chance to shine.
M) The problems associated with grade inflation aren’t limited to elite college applicants. More than 70 percent of schools and districts analyzed by an education audit company called SchoolMatch had average GPAs significantly higher than they should have been based on their standardized test scores―including the school systems in Chicago, Illinois, Pittsburgh, Pennsylvania, Denver, Colorado, San Bernardino, California, and Columbus, Ohio. That raises concerns about students graduating from those schools unprepared for college. “They get mixed in with students from more rigorous schools and they just get blown away,” said SchoolMatch CEO William Bainbridge.
N) In Georgia, high school grades rose after the state began awarding HOPE scholarships to students with a 3.0 high school GPA. But the scholarship requires students to keep a 3.0 GPA in college, too, and more than half who received the HOPE in the fall of 1998 and entered the University of Georgia system lost eligibility before earning 30 credits. Next year, Georgia is taking a range of steps to tighten eligibility, including calculating GPA itself rather than relying on schools, and no longer giving extra GPA weight to vaguely labeled “honors” classes.
O) Among those who work with students gunning for the more selective colleges, opinions differ as to why there seem to be so many straight-A students. “I think there are more pressures now than there used to be, because 20 or 30 years ago kids with a B plus average got into some of the best colleges in the country,” said William Shain, dean of admissions and financial aid at Bowdoin College in Maine. “It didn,t matter if you had a 3.9 instead of a 3.95. I don,t know if it matters now either, but people are more likely to think it does.”
P) Lord, the Haverford dean, sees grade inflation as the outcome of an irrational fear among students to show any slip up―in grades or discipline. In fact, colleges like his are often more interested in students who have overcome failure and challenge than robots who have never been anything less than perfect. “There,s a protection and encouragement of self-esteem that I don’t agree with, but I think it’s a lot of what’s going on here,” he said. “And the college admissions process feeds into that.”
Q) Back in Minnesota, Edina may join a growing number of schools that no longer officially rank students―a move that could help students like Zalasky, who says he was told by Wisconsin his class rank makes him a longshot. “They feel they’re being left behind or not getting into the schools that they’re applying to because of a particular class rank,” says Edina counselor Bill Hicks. “And there is some validity with respect to some certain schools that use certain formulas.”
R) But the colleges most popular with Edina students already know how strong the school is: students’ median verbal and math SAT scores are 1170 out of 1600. Hicks isn’t willing to blame the concentration grades at the top on spineless teachers, or on grade-grubbing by parents and students. Expectations are high, and grades are based on student mastery of the material, not a curve. Wherever teachers place the bar for an A, the students clear it.
S) “Everyone here is like, ‘ if I can get a 98 why would I get a 93? said Lavanya Srinivasan, who was ranked third in her Edina class last year. Far from being pushovers, she says, Edina teachers are tougher than those in a course she took at Harvard last summer. Zalasky agrees the students work hard for their high grades. “The mentality of this school is, if you’re not getting straight A,s you’re not doing well,” he said. “There’s just so much pressure on us day in and day out to get straight A’s that everybody does.” Hicks compares the atmosphere at Edina to the World Series expectations that always surround the superstar lineup of the New York Yankees. “If they don’t win it,” he said, “then it’s failure.”
1. Nearly half of the applications that the University of California received this autumn had GPAs of 4.0 or above.
2. It,s also harder for the most selective colleges to lessen the effect of standardized tests.
3. More than 30 years ago, about 11.5 percent of college freshmen reported their average grade in high school was an A or better.
4. Because of the negative effects of standardized tests recently, a lot of universities have no longer required test scores.
5. Some think Zalasky’s improvement unworthy, while others think his high grades win the praise for him.
6. Because many of his classmates are so outstanding, Zalasky is nervous about his college application.
7. Some colleges would like to admit students who have conquered failure and challenge rather than those who have never been anything less than perfect.
8. In the next year, Georgia is taking a series of measures to tighten qualification, including calculating GPA itself and avoiding paying too much attention to vaguely labeled “honors” classes.
9. In Zalasky,s opinion, students are put under great pressure to work hard to get straight A“s, or they will be regarded as losers.
10. More and more schools no longer officially rank students by grade, which can help students like Zalasky.
篇5:6月英语四级阅读理解模拟题及答案
12月的英语四级已经告一段落了,下面是关于6月大学英语四级阅读理解的模拟练习题及答案,希望对同学们有所帮助。
Water problems in the future will become nore intense and more complex. Our increasing population will tremendously increase urban wastes,primarily sewage. On the other hand, increasing demands for water will decease substantialy the amount of water available for diluting wastes. Rapidly expanding industries which involve more and more complex chemical processes will produce large volumes of liquid wastes, and many of these will contain chemicals which are noxious. To feed our rapidly expanding population, agriculture will have to be intensified. This will involve ever-increasingquantities of agricultural chemicals, From this , it is apparent that drastic steps must be taken immediately to develop corrective measures for the pollution problem.
There are two ways by which this pollution problem can be dwindled. The first relates to the treatment of wastes to decrease their pollution hazard. This involves the processing of solid wastes ”prior to “ disposal and the treatment of liquid wastes, or efflunets,to permit the reuse of the water or minimize pollution upon final disposal.
A second approach is to develop an economic use for all or a part of the wastes. Farm manure is spread in fields as a nutrient or organic supplement . Effluents from sewage disposal plants are used in some areas both for irrigation and for the nutrients contained. Efflunets from other processing plants may also be used as a supplemental source of water. Many industries, such as meat and poultry processing plants, are currently converting former waste products into marketable byproducts. Other industries are potential eonomic uses for waste products.
1.The purpose of this passage is ______.
a.to alert the reader to the dwindling water supply
b.to explain industrial uses of water
c.to acquaint the reader with water pollution problems
d.to demostrate various measures to solve the pollution problem
2.Which of the following points is NOT INCLUDED in the passage?
a.In dustrial development incudes the simplification of complex chemical processes.
b.Diluting wastes needs certain amount of water
c.Demands for water will go up along with the expanding population
d.Intensive cultivation of land requires more and more chemicals
3.The reader can conclued that________.
a.countries of the world will work together on polution problems
b.byproducts from wastes lead to a more prosperous marketplace
c.science is making great progress on increasing water supplies
d.some industries are now ,aking economic use of wastes
4.The author gives substance to the passage through the use of _______.
a.interviews with authorities in the field of water controls
b.opinions and personal observations
c.definitions which clarify important terms
d.strong arguments and persuasions
5.The words ”prior to “(para.2) probably mean______.
a.after
b.during
c.before
d.beyond
答案:cadbc
篇6:大学英语六级阅读理解模拟题
阅读理解:Part ⅡReading Comprehension (35 minutes) Directions:There are 4 passages in this part. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A), B), C) and D). You should decide on the best choice and mark the corresponding letter on the Answer Sheet with a single line through the centre.
Passage 1
Questions 21 to 25 are based on the following passage:
People do not analyze every problem they meet. Sometimes they try to remember a solution from the last time they had a similar problem. They often accept the opinions or ideas of other people. Other times they begin to act without thinking; they try to find a solution by trial and error. However, when all these methods fail, the person with a problem has to start analyzing. There are six stages i First the person must recognize that there is a problem. For example, Sam’s bicycle is broken, and he cannot ride it to class as he usually does. Sam must see that there is a problem with his bicycle.?
Next the thinker must define the problem. Before Sam can repair his bicycle, he must find the reason why it does not work. For instance, he must determine if the problem is with the gears, the brakes, or the frame. He must make his problem more specific.?Now the person must look for information that will make the problem clearer and lead to possible solutions. For instance, suppose Sam decided that his bike does not work because there is something wrong with the gear wheels. At this time, he can look in his bicycle repair book and read about gears. He can talk to his friends at the bike shop. He can look at his gears carefully.?
After studying the problem, the person should have several suggestions for a possible solution. Take Sam as an illustration. His suggestions might be: put oil on the gear wheels; buy new gear wheels and replace the old ones; tighten or loosen the gear wheels. ?Eventually one suggestion seems to be the solution to the problem. Sometimes the final idea comes very suddenly because the thinker suddenly sees something new or sees something in a new way. Sam, for example, suddenly sees that there is a piece of chewing gum(口香糖)between the gear wheels. He immediately realizes the solution to his problem: he must clean the gear wheels.
Finally the solution is tested. Sam cleans the gear wheels and finds that afterw ards his bicycle works perfectly. In short, he has solved the problem.
21.In analyzing a problem we should do all the following except ____
A) recognize and define the problem
B) look for information to make the problem clearer
C) have suggestions for a possible solution
D) find a solution by trial or mistake
22.By referring to Sam’s broken bicycle, the author intends to ____.
A) illustrate the ways to repair his bicycle
B) discuss the problems of his bicycle
C) tell us how to solve a problem
D) show us how to analyze a problem
23.Which of the following is NOT true?
A) People do not analyze the problem they meet.
B) People often accept the opinions or ideas of other people.
C) People may learn from their past experience
D) People cannot solve some problems they meet.
24.As used in the last sentence, the phrase “in short” means ____.
A) in the long run B) in detail C) in a word D) in the end
25.What is the best title for this passage?
A) Six Stages for Repairing Sam’s Bicycle.
B) Possible Ways to Problem-solving.
C) Necessities of Problem Analysis.
D) Suggestions for Analyzing a Problem.
篇7:6月英语六级阅读理解模拟题
A wise man once said that the only thing necessary for the triumph of evil is for good men to do nothing. So, as a police officer, I have some urgent things to say to good people.
Day after day my men and I struggle to hold back a tidal wave of crime. Something has gone terribly wrong with our once-proud American way of life. It has happened in the area of values. A key ingredient is disappearing, and I think I know what it is: accountability (责任感).
My job as a police pfficer is to impose accountability on people who refuse, or have never learned, to impose it on themselves. But as every policeman knows, external control on people's behavior is far less effective than internal restraints such as guilt, shame and embarrassment.
Fortunately there are still communities―smaller towns, usually―where schools maintain discipline and where parents hold up standards that proclaim:
”In this family certain things are not tolerated―they simply are not done!“
Yet more and more, especially in our large cities and suburbs, these inner restraints are loosening. Your typical robber has none. He considers your property his property; he takes what he wants, including your life if you enrage him.
The main cause of this break-down is a radical shift in attitudes. Thirty years ago, if a crime was committed, society was considered the victim. Now, in a shocking reversal, it's the criminal who is considered victimized: by his underprivileged upbringing, by the school that didn't teach him to read, by the church that failed to reach him with moral guidance, by the parents who didn't provide a stable home.
I don't believe it. Many others in equally disadvantaged circumstances choose not to engage in criminal activities. If we free the criminal, even partly, from accountability, we become a society of endless excuses where no one accepts responsibility for anything.
Americans desperately need more people who believe that the person who commits a crime is the one responsible for it.
21. What the wise man said suggests that______.
A. it's certain that evil will prevail if good men do nothing about it
B. it's unnecessary for good people to do anything in face of evil
C. it's only natural for virtue to defeat evil
D. it's desirable for good men to keep away from evil
22. According to the author, if a person is found guilty of a crime, ______.
A. society is to be held responsible
B. modern civilization is responsible for it
C. the standards of living should be improved
D. the criminal himself should bear the blame
23. Compared with those in small towns, people in large cities have
A. better sense of discipline B. more mutual respect C. less effective government D. less self-discipline
24. The writer is sorry to have noticed that______.
A. people in large cities tend to excuse criminals
B. people in small towns still stick to old discipline and standards
C. today's society lacks sympathy for people in difficulty
D. people in disadvantaged circumstances are engaged in criminal activities
25. The key point of the passage is that
A. stricter discipline should be maintained in schools and families
B. more good examples should be set for people to follow
C. more people should accept the value of accountability
D. more restrictions should be imposed on people
21. A 22. D 23. D 24. A 25. C
篇8:6月英语六级阅读理解模拟题
The birth of computers has brought with it a new set of opportunities for mischief and crime. Today, computers are easy to come by and many people know how computer technology 11 . More importantly, the growing use of computer networks can multiply the violation of security, making large numbers of people more vulnerable than would be the case if they were using 12 , stand-alone computers.
What's more, computer experts agree that―despite recent widespread publicity-computer viruses are 13 one of the many computer security problems facing the nation.
The U. S. Defense Advanced Research Project Agency has requested that the Research Council's Science and Technology Board 14 the security problems posed by computer technology, see what 15 may already exist, review research efforts 16 at avoiding security problems in the future, and evaluate existing policies 17 to computer security. The study committee will examine the 18 of security for a broad spectrum of users, including the business, national security, and academic communities, as well as the 19 public.
David. Clark, senior research scientist, Laboratory for Computer Science, Massachusetts Institute of Technology, will chair the 20 of experts in
electronic security, net-work security, computer law, software engineering ? and operating systems. The committee will also include computer users from the defense and banking industries.
A. only
B. works
C. solutions
D. general
E. issue
F. fundamentally
G. universal
H. assess
I. aimed
J. single
K. committee
L. generates
M. relevant
N. question
O. community
II. B 12. J 13. A 14. H 15. C 16. I 17. M 18. E 19. D 20. K
篇9:大学英语四级考试阅读理解模拟题及答案
In the 1960s, many young Americans were dissatisfied with American society. They wanted to end the Vietnam War and to make all of the people in the U.S. epual. Some of them decided to ”drop out“ of American society and form their own societies . They formed utopian communities , which they called ”communes,“ where they could follow their philosophy of ”do your own thing.“ A group of artists founded a commune in southern Colorado called ”Drop City.“ Following the ideas of philosopher and architect Buckminster Fuller they built domeshaped houses from pieces of old cars. Other groups, such as author Ken Kesey's Merry Pranksters, the followers fo San Francisco poet Steve Gakin, and a group that called itself the Hog Farm, lived in old school huses and traveled around the United States. The Hog Farm become famous when they helped organize the Woodstock Rock Festival in 1969. Steve Gaskin's followers tried to settle down on a farm in Tennessee, but they had to leave when some members of the gruop were arrested for growing marijuana.
Not all communes believed in the philosophy of ”do you own thing,“ however . Twin Oaks , a commune founded in Virgiania in the late 1960s, was based on the ideas of psychologist B.F.Skinner. The people who lived at Twin Oaks were carefully controlled by Skinner's ”conditioning“ techniques to do things that were good for the community. In 1972, Italian architect Paolo Soleri began to build Arcosanti, a utopian city Arizsona where 2500 people will live closely together in one large building called an ”archology“ Soleri believes that people must live closely together so that they will all become one.
1.Why did some young Americans decide to ”drop out“ of scoiety during the 1960s?
a.They were not satisfied with American society.
b.They wanted to grow marijuana.
c.They wanted to go to the Vietnam War.
d.They did not want all people to be equal.
2.Where did the members of the Hog Farm commune live?
a.In dome-shaped house
b.In old school huses
c.On a farm inTennessee
d.In an archology in Arizona
3.Who gave the people of Drop City the idea to bulid dome-shaped house?
a.Paolo Soleri
b.B.G.Skinner
c.Steve Gaskin
d.Buckminster Fuller
4.What was the Twin Oaks commune base on ?
a.The philosophy of ”do your own thing“
b.Virginaia in the late 1960s
c.The ideas of psychologist
d.The belief that people must live closely togerher.
5.What is an ”archology“?
a.A person who studies archaeology
b.A large building where people live closely together
c.A city in A rizona
d.A technique to contorl people
答案:ABDCB
篇10:6月大学英语四级阅读理解模拟题及答案
Statuses are marvelous human inventions that enable us to get along with one another and to determine where we ”fit“ in society. As we go about our everyday lives, we mentally attempt to place people in terms of their statuses. For example, we must judge whether the person in the library is a reader or a librarian, whether the telephone caller is a friend or a salesman, whether the unfamiliar person on our property is a thier or a meter reader, and so on.
The statuses we assume often vary with the people we encounter, and change throughout life. Most of us can, at very high speed, assume the statuses that various situations require. Much of social interaction consists of identifying and selecting among appropriate statuses and allowing other people to assume their statuses in relation to us. This means that we fit our actions to those of other people based on a constant mental process of appraisal and interpretation. Although some of us find the task more difficult than others, most of us perform it rather effortlessly.
A status has been compared to ready-made clothes. Within certain limits, the buyer can choose style and fabric. But an American is not free to choose the costume (服装) of a Chinese peasant or that of a Hindu prince. We must choose from among the clothing presented by our society. Furthermore, our choice is limited to a size that will fit, as well as by our pocketbook (钱包). Having made a choice within these limits we can have certain alterations made, but apart from minor adjustments, we tend to be limited to what the stores have on their racks. Statuses too come ready made, and the range of choice among them is limited.
这是一篇说明文,讲的是人们的Status(身份、地位)这一问题。
51. In the first paragraph, the writer tells us that statuses can help us _______.
A) determine whether a person is fit for a certain job
B) behave appropriately in relation to other people
C) protect ourselves in unfamiliar situations
D) make friends with other people
[答案及分析]:[B]事实辨认题。问在第一段作者告诉我们人的身份对我们有下列哪种帮助。第一段第一句说得很明白:“身份有助于我们和别人相处,决定我们在社会中所处的地位、扮演的角色”,[B]项意为“正确地与人交往”,正是上述意思。
52. According to the writer, people often assume different statuses ______.
A) in order to identify themselves with others
B) in order to better identify others
C) as their mental processes change
D) as the situation changes
[答案及分析]:[D]事实辨认题。问作者认为,在什么情况下人们经常具有不同的身份。[A]项意为“为了将自己预其他人区别开”,[B]项为“为了更好地识别他人”,[C]项为“当心理发生变化时”,[D]项意为“随着环境的变化”。[A]、[B]、[C]三项都不合文章原意,并且根据第二段第一、二句话可知[D]项正确。
53. The word ”appraisal“ (Line5, Para.2) most probably means ”_______“.
A) involvement B) appreciation C) assessment D) presentation
[答案及分析]:[C]词义理解题。问第二段第六行中的appraisal一词的意思是什么。根据该词所在的句子,可知该词含义和mental process(思想过程)有关,并且可能与和其并列的词interpretation(解释,说明,理解)有一定相似之处。involvement意为“陷入,卷入;牵涉,包含”,assessment意为“估计,评估;所估计之数额”,appreciation表示“感谢,感激;欣赏,评价,赏识”,presentation意为“赠送;提出;引见,介绍;出席,呈现;演出”。比较起来,[B]项符合上述两点,而且意思上说得通。appraisal的准确意思是“估计,估价,评价”,在此句中“评价”讲。
54. In the last sentence of the second paragraph, the pronoun ”it“ refers to ”______".
A) fitting our actions to those of other people appropriately
B) identification of other people's statuses
C) selecting one's own statuses D) constant mental process
[答案及分析]:[A]事实辨认题。问第二段最后一句中“it”指代什么。根据句意及其结构可知:it指代the task,即前一句“we fit out actions to those of people based on a constant mental process of appraisal and interpretation”,不难看出[A]项正确。
篇11:六级英语阅读理解练习附答案解析
六级英语阅读理解练习:可再生能源
Renewable Energy
In the past century,it has been seen that the consumption of non-renewable sources of energy has caused more environmental damage than any other human activity. Electricity generated from fossil fuels such as coal and crude oil has led to high concentrations of harmful gases in the atmosphere.This has in turn led to many problems being faced today such as ozone depletion and global warming. Vehicular pollution has also been a major problem.
Therefore,alternative sources of energy have become very important and relevant to today's world.These sources,such as the sun and wind,can never be exhausted and therefore arc called renewable.They cause less emission and are available locally.Their use can. to a large extent,reduce chemical,radioactive, and thermal pollution. They stand out as a viable source of clean and limitless energy.These are also known as non-conventional sources of energy.Most of the renewable sources of energy are fairfy non-polluting and considered clean though biomass,a renewable source,is a major polluter indoors.
Solar Energy
Solar energy is the most readily available source of energy.It does not belong to anybody and is,therefore,free.It is also the most important of the non-conventional sources of energy because it is non-polluting and,therefore.helps in lessening the greenhouse effect.
Solar energy has been used since prehistoric times.but in a most primitive manner.Before 1970,some research and development was carried out in a few countries to exploit solar energy more efficiently,but most of this work remained mainly academic.After the dramatic rise in oil prices in the 1970s,several countries began to formulate extensive research and development programmes to exploit solar energy.
When we hang out our clothes to dry in the sun,we use the energy of the sun.In the same way, solar panels absorb the energy of the sun to provide heat for cooking and for heating water.Such systems are available in the market and are being used in homes and factories.
Solar energy can also be ursed to meet our electricity requirements.Through Solar Photovoltaic(SPV)cells,solar radiation gets converted into DC electricity directly.This electricity can either be used as it is or can be stored in the battery.This stored electrical energy then can be used ac night.
Hydro Power
Hydro power is one of the best,cheapest,and cleanest source of energy,although,with big dams,there are many environmental and social problems.Small dams are,however,free from these problems.This is in fact one of the earliest known renewable energy sources.in the country(since the beginning of the 20th century).
In fact,for the last few hundred years,people living in the hills of the Himalayas have been using water mills.or chakki,to grind wheat.Besides being free from the problem of pollution.small hydropower plants are also free from issues and controversies that are associated with the bigger projects.namely affecting the lives of thousands of people living along the banks of the rivers.destruction of large areas under forest.and seismological threats.
New environmental laws affected by the danger of global warming have made energy from small hydropower plants more relevant.These small hydropower piants can serve the energy needs of remote rural areas independently.The real challenge in a remote area lies in successful marketing of the energy and recovering the dues.Local industries should be encouraged to use this electricity for sustainable development.
It is a technology with enormous potential.which could exploit the water resources to supply energy to remote rural areas with little access to conventional energy sources.It also eliminates most of the negative environmental effects associated with large hydro projects.
Energy From the Sea-Ocean Thermal,Tidal and Wave Energy
On an averaige,the 60 million square kilometre of the tropical seas absorb solar radiation equivalent to the heat content of 245 billion barrels of oil.Scientists feel that if this energy can be tapped a large source of energy will be available to the tropical countries and to other countries as well.The process of harnessing this energy is called OTEC(ocean thermal energy conversion).It uses the temperature differences between the surface of the ocean and the depths of about lOOOm to operate a heat engine.which produces electric power.
Energy is also obtained from wavcs and tides.In some countries such as Japan small scale power generators run by energy from waves of the ocean,have been used as power sources for channcl marking buoys.
Biomass
Biomass is a renewable energy resource derived from the carbonaceous waste of various human and natural activities.It is derived from numerous sources,including the by-products from the timber industry.agricultural crops,raw material from the forest,major parts of household waste and wood.
Biomass does not add carbon dioxide to the atmosphere as it absorbs the same amount of carbon in growing as it releases when consumed as a fuel. Its advantage is that it can be used to generate electricity with the same equipment of power plants that are now burning fossil fuels.Biomass is an important source of energy and the most important fuel worldwide after coal,oil and natural gas.
Traditional use of biomass is more than its use in modern application.In the developed world biomass is again becoming important for applications such as combined heat and power generation.In addition,biomass energy is gaining significance as a source of clean heat for domestic heating and community heating applications.In fact in countries like Finland.USA and Sweden the per capita biomass energy used is higher than it is in India.China or in Asia.
Geothermal Energy
We live between two great sources of energy,the hot rocks beneath the surface of the earth and the sun in the sky.Our ancestors knew che value of geothermal energy;they bathed and cooked in hot springs.Today we have recognized that this resource has potential for much broader application.
The core of the earth is very hot and it is possible to make use of this geothermal energy(in Greek it means heat from the earth).These are areas where there are volcanoes.hot springs,and geysers,and methane under the water in the oceans and seas. n some countries,such as in the USA water is pumped from underground hot water deposits and used to heat people's houses.
The utilization of geothermal energy for the production of electricity dates back to the early part of the twentieth century.For 50 years the generation of electricity from geothermal energy was confined to Italy and interest in this technology was slow co spread elsewhere.In 1943 the use of geothermal hot water was pioneered in lceland.
Co-generation
Co-generation is the concept or producing two forms of energy from one fuel.One of the forms of energy must always be heat and the other may be electricity or mechanical energy.In a conventional power plant,fuel is burnt in a boiler to generate high-pressure steam.This steam is used to drive a turbine.which in turn drives an alternator through a steam turbine to produce electric power.The exhaust steam is generally condensed to water which goes back to the boiler.
As the low-pressure steam has a large quantum of heat which is lost in the process of condensing,the efficiency of conventional power plants is only around 35%.In a cogeneration plant,very high efficiency levels,in the range of 75%-90%,can be reached.This is so,because the low-pressure exhaust steam coming out of the turbine is not condensed,but used for heating purposes in factories or houses.
Since co-generation can meet both power and heat needs, it has otber advantages as well in the form of significant cost savings for the plant and reduction in emissions of pollutants due to reduced fuel consumption.
阅读理解练习测试题:
1.High concentrations of harmful gases are resulted from______________.
A) ozone depletion B) global warming
C) the consumption of fossil fuels D) serious water and air pollution
2.The sun and wind are called renewable energy because they are____________.
A) natural B) inexhaustible
C) newly-found D) clean
3.Biomass,though a renewable energy,mainly causes_______________.
A) indoor pollution B) outdoor pollution
C) industrial pollution D) agricultural pollution
4.In the l970s,some countries began to be concerned about solar energy because of___________.
A) economic recession B) sharp rise in oil prices
C) reduced oil production D) increased research funds
5.In the hills of the Himalayas,“chakki”are used for_____________.
A) purifying water B) keeping animals
C) producing power D) exchanging goods
6.What is recommended to be used by the remote rural areas with little access to conventional energy sources?
A) Small hydropower plants. B) Solar energy heaters.
C) Wind power mills. D) Hot spring thermal energy.
7.It is mentioned that,between the surface and the depth of the ocean,there are great differences in_____________.
A) dissolved substance B) natural resource variety
C) marine life species D) water temperature
8.After coal oil and natural gases,the fourth most important fuel is_____________.
9.ICeland was the first counfry that______________.
10.In the conventional power plants,a large quantum of heat is lost in the process of condensing______________.
阅读理解练习答案解析:
1.[C][定位]根据题干中的high concentrations of harmful gases查找到第1段第2句。
解析:选项C与题干组成的因果关系与原文该句中的因果关系虽然表述不同,但内容相同,因此选项C为本题答案。选项A和选项B是high concentrations of harmful gases造成的结果,而非原因,因此不能选。
2.[B][定位]根据题干中的sun,wind,renewable等词查找到第2段第2句。
解析:选项B与原文该句中的can never be exhausted同义,为本题答案。选项A和选项C的内容没有在原文提及,选项D不能与题干构成相应的因果关系。
3.[A][定位]根据题干中的biomass查找到第2段最后一句。
解析:原文该句中的a major polluter indoors表明biomass主要引起室内的污染,选项A表达了与此相同的内容,故为本题答案。
4.[B][定位]根据题干中的数字1970s查找到第1个小标题Solar Energy下第2段最后一句。
解析:在四个选项中,只有选项B在原文该句中提及,其他选项都是无中生有。
5.[C][定位]根据题干中的大写名词Himalayas和专有名词“chakki”查找到第2个小标题Hydro Power下第2段第1句。
解析:原文该句以居住在喜马拉雅山的人们为例说明人们很早就开始“利用水力发电”了,因此,本题应选C。
6.[A][定位]根据题干中的remote rural areas和conventional等词查找到第2个小标题Hydro Power下第4段首句。
解析:原文该句中的It指代hydro power,该句还是围绕“水力发电”这一话题,由此可排除B、C和D选项,正确答案为A。
7.[D][位]根据题干中的surface,depth,ocean等词查找到第3个小标题Energy From the Sea-Ocean Thermal,Tidal and Wave Energy下首段末句。
解析:在原文该句中,只有选项D的内容有提及,其他内容均没有原文依据,因此选项D为本题答案。
8.[biomass]
[定位]根据题干中的coal,oil,gases和fourth等词查找到笫4个小标题Biomass下第2段末句。
解析:空白处应为名词词组。题目只是将原文的主语和表语的位置倒转,由此可见,原文中的主语biomass为本题答案。
9.[used geothermal hot water]
[定位]根据题干中的专有名词Iceland查找到第5个小标题Geothermal Energy下末段末句。
解析:空白处应为定语从句的谓宾部分。原文该句中的pioneered表明冰岛是首个使用地热温泉的地方,在回答问题的时候,注意that后应该是定语从句的谓语,由于事情发生在l943年,该谓语动词应为过去式。
10.[the low-pressure steam]
[定位]根据题干中的conventional power plants和quantum of heat等词查找到最后一个小标题Co-generation下第2段首句。
解析:空白处应为名词词组。在原文该句中,condensing后面并没有带任何宾语,但该段末句中的the low-pressure... is not condensed提示了首句中condensing的宾语应该是该句开头的the low-pressure steam,这也就是本题答案。
阅读理解练习参考译文:
可再生能源
在上个世纪人们看到,消耗不可再生能源对环境造成的损害比任何其他人类活动都大。[1]从煤炭、原油等化石燃料中产生的电能使大气中积聚了高浓度的有害气体,这反过来导致了许多人们今天需要面对的问题,如臭氧层的减少以及全球气候变暖等。汽车污染也是个主要问题。
因此,替代性的能源非常重要,与当今的世界密切相关。[2]这些能源(如太阳能和风能)用之不竭,因此称为可再生能源。它们减少了排放物,并且可以就地利用。它们的使用可以在很大程度上减少化学污染、辐射污染和热污染。作为可行的清洁能源,它们用之不尽,具有突出的优势,还被祢为非常规能源。[3]尽管生物作为可再生能源是室内污染的主要来源,但大多数可再生能源基本上不污染环境,因而被看做是清洁能源。
太阳能
太阳能是遍布最广的随地可用的能源。它不属于任何人,因此可以免费使用。它也是非常规能源中最重要的能源,因为它无污染,因而有助于减轻温室效应。
自从史前时代起人们就开始使用太阳能了,不过,其使用方式极为简单。1970年以前,在一些国家人们为了更有效地利用太阳能而做了一些研发工作,但大多数的研发工作主要停留在学术研究上。[4]20世纪70年代石油价格急剧上涨后,有些国家为了利用太阳能开始展开广泛的研发工作。
我们把衣服挂到太阳底下晒干,就是在利用太阳能。同样地,太阳能电池板吸收太阳能为煮饭烧水提供热能。这样的设备如今市场上已有销售.正在为家庭和工厂所使用。
我们还可以利用太阳能满足对电力的需求。通过太阳能光电板。太阳辐射可以直接转化为直流电。这种电可以直接使用,也可以在电池中储存起来。这样储存起来的电能就可以在夜晚使用。
水电
水电是最好、最廉价、最清洁的能源之一,虽然建造大坝带来了许多环境和社会问题。但小水坝就不存在这些问题。在这个国家,这实际上是最早为人所知的可再生能源之一(从20世纪初开始)。
[5]事实上,在过去的几百年里,居住在喜马拉雅山的人们一直都在利用水磨(或称为chakki)来磨小麦。小水电站除了没有污染问题,也不存在大型项目所带来的种种问题和矛盾-----大水坝影响了住在河岸的成千上万居民的生活,破坏了大面积的森林,并带来地震的危险。
地球变暖的危险使得人们通过了新的环境立法,这些新的立法使小水电厂产生的电能更加具有实际价值。这些小水电可以独立地为偏远乡村地区供电。在偏远地区建设小水电的实际挑战在于有效地推销电能并收回电费。为了可持续发展.应该鼓励当地企业使用这种电力。
[6]这是一种具有巨大潜力的技术,它可以利用水资源向难以采用常规能源的偏僻乡村地区提供电力。它还避免了大型水利工程对环境所带来的负面影响。
海洋能源――海洋热能,潮汐能和波浪能
6000万平方公里的热带海洋吸收的太阳辐射平均相当于2450亿桶石油的能量。科学家们觉得,如果这种能量可以得到开发的话,就可以为热带国家以及其他国家提供巨大的能源。利用这种能源的过程叫做“海洋热能转换”。[7]它利用海洋表面海水和大约lOOO米深处的海水的温差来推动热力发动机来发电。
人们还从波浪和潮汐中获得能量。在一些国家,比如日本,波浪或海洋能量推动的小规模发电机被用来向标记航道的浮标提供电能。
生物能
生物能源是种可再生能源,来自各种人类活动或自然活动的含碳废弃物。它有许多来源,包括木材工业的副产品、农作物、森林中的原材料、生活垃圾的主要部分以及木头。
生物能源不会给大气增加二氧化碳,因为它用作燃料焚烧时释放的碳和在生产过程中吸收的碳一样多。这种能源的优势是,可以利用目前焚烧化石燃料的发电厂的同样设备来发电。[8]生物能源是一种重要的能源,世界范围内,其重要性仅次于煤炭、石油和是然气。
传统上时生物能源的利用远远超出它在现代社会的利用程度。在发达国家,生物能源现在变得再次重要起来,被用于辅助供热、发电。此外,生物能源作为一种家庭和社区供热设施的清洁热源现正益发重要。事实上,在芬兰、美国和瑞典等国,人均使用的生物能比在印度、中国或亚洲其他国家都多。
地热能
我们居住在两大能源之间:地表下是滚烫的岩石,天上是太阳。我们的祖先知道地热的价值,他们在温泉里沐浴,用温泉煮东西。如今我们意识到,这种能源拥有更广泛的应用前景。
地板很热,利用地热能(希腊语中表示“来自地球的热”)是可能的。这些地方包括那些有火山、温泉和间歇泉的地方,还包括海洋水底下的甲烷。在一些国家,比如在美国,人们从地底下的热水池中把水抽出来给房子供暖。
利用地热能发电的历史可以追溯到20世纪早期。有50年的时间里只有意大利在利用地热发电,其他地方的人们过了很久才渐渐地对这种技术感兴趣。[9]1943年,首先是冰岛开始着手开发地热温泉。
热电联产
热电联产是指利用一种燃料同时产生两种形式的能量。其中一种能量一定是热能,另一种能量可以是电能,也可以是机械能。在传统的发电厂,燃料在锅炉里燃烧以便产生高压蒸汽,蒸汽推动涡轮,涡轮又通过蒸汽轮机推动交流发电机发电。废汽通常凝结成水,又回到锅炉里。
[l0]因为低压蒸汽含有大量的热能,这些热能在蒸汽凝结的过程中损耗了,因此传统发电厂的热效率只有大约35%。在热电联产的发电厂却可以达到很高的效率水平,在75%-90%之间。[10]这是因为从涡轮冒出的低压废汽并不用来冷凝成水,而是用来为工厂或房屋供暖。
因为热电联产可以同时满足供电、供热的需求,它还有其他一些优点:可以为工厂大量节省成本:因为减少了燃料的消耗,可以减少污染物的排放。
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