[外语类试卷]大学英语六级模拟试卷344及答案与解析.doc

1、大学英语六级模拟试卷 344及答案与解析 一、 Part I Writing (30 minutes) 1 Directions: For this part, you are allowed 30 minutes to write a composition on the topic An Impressive Film. You should write at least 150 words following the outline given below in Chinese: 1. 简单 介绍你最喜欢的一部电影 2. 谈谈你对这部电影但感受 3. 总结 二、 Part II Read

2、ing 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 attached to the passage. For questions 1-4, mark： Y (for YES) if the statement agrees with the information given in the passage; N (for NO

3、) if the statement contradicts the information given in the passage; NG (for NOT GIVEN) if the information is not given in the passage. 1 Climate Change Climate change is with us. A decade ago, it was conjecture. Now the future is unfolding before our eyes. Canadas Inuit see it in disappearing Arcti

4、c ice and permafrost (永久冻结带 ). The shanty town dwellers of Latin America and Southern Asia see it in lethal storms and floods. Europeans see it in disappearing glaciers, forest fires and fatal heat waves. Scientists see it in tree rings, ancient coral and bubbles trapped in ice cores. These reveal t

5、hat the world has not been as warm as it is now for a millennium or more. The three warmest years on record have all occurred since 19983 19 of the warmest 20 since 1980. And Earth has probably never warmed as fast as in the past 30 years a period when natural influences on global temperatures, such

6、 as solar cycles and volcanoes should have cooled us down. Climatologists reporting for the UN Intergovernmental Panel on Climate Change (IPCC) say we are seeing global warming caused by human activities. The felling down of trees that largely decrease the photosynthesis (光合作用 ) to absorb CO2 and th

7、e burning of coal, oil and natural gas that gives out great amount of CO2 in the air all result in the increasing of temperatures. Global Greenhouse People are causing the change by burning natures vast store of coal, oil and natural gas. This releases billions of tons of carbon dioxide (CO2) every

8、year, although the changes may actually have started with the dawn of agriculture, say some scientists. The physics of the “greenhouse effect“ has been a matter of acientific fact for a century. CO2 is a greenhouse gas that traps the suns radiation within the troposphere(对流屋 ), the lower atmosphere.

9、 It has accumulated along with other man-made greenhouse gases, such as methane (沼气 ) and chlorfiuorocarbons (CFCs) (碳氟化合物 ). Some studies suggest that cosmic rays may also be involved in warming. If current trends continue, we will raise atmospheric CO2 concentrations to double pre-industrial level

10、s during this century. That will probably be enough to raise global temperatures by around 2 to 5 . And the trend is still going on. Some warming is certain, but the degree will be determined by cycles involving melting ice, the oceans, water vapor, clouds and changes to vegetation and plants. Warmi

11、ng is bringing other unpredictable changes. Melting glaciers and precipitation are causing some rivers to overflow, while evaporation is emptying others. Diseases are spreading, especially in tropical areas. Some crops grow faster than before while others see yields slashed greatly by disease and dr

12、ought. Clashes over dwindling water resources may cause conflicts in many regions. As natural ecosystems such as coral reefs are disrupted, biodiversity is reduced. Most species cannot migrate fast enough to keep up, though others are already evolving in responses to warming. This has resulted to th

13、e extinction (or close extinction) of some species and put a lot of species in danger. In addition, for those who have adapted to the new environment, the amount of the species is increasing in great deal. Thermal expansion of the oceans, combined with melting ice on land, is also raising sea levels

14、. In this century, human activity could trigger an irreversible melting of the Greenland ice sheet. This would condemn the world to a rise in sea level of six metersenough to flood land occupied by billions of people. And this is one fear that almost all scientists hold in heart. The global warming

15、would be more pronounced if it were not for sulphur particles and other pollutants that shade us, and because forests and oceans absorb around half of the CO2 we produce. But the accumulation rate of atmospheric CO2 has doubled since 2001, suggesting that natures ability to absorb the gas could now

16、be stretched to the limit. Recent research suggests that natural CO2“sinks“, like peat bogs(泥炭沼 ) and forests, are actually starting to release CO2. Deeper Cuts Greenhouse effect has already become a global concern that requires all nations to involve in. At the Earth Summit in 1992, the world on th

17、e whole agreed to prevent “dangerous“ climate change. The first step was the 1997 Kyoto Protocol, which will now finally come into force during 2005. It will bring modest emission reductions from industrialized countries. But many observers say deeper cuts are needed in developing nations, which hav

18、e large and growing populations, and increasing greenhouse emissions, will one day have to join in the move. Some, including the US Bush administration, say the scientific uncertainty over the pace of climate change is grounds for delaying action. The US and Australia have reneged on Kyoto. But most

19、 scientists believe we are under-estimating the dangers. In any case, according to the IPCC, the world needs to quickly improve the efficiency of its energy usage and develop renewable non-carbon fuels like wind, solar, tidal, wave and perhaps unclear power. It also means developing new methods of c

20、onverting this clean energy into motive power, like hydrogen fuel cells for cars. And as a matter of fact, some industrial countries have already started to go this way and achieved fairly good results. Other less conventional solutions include ideas to stave off warming by “mega-engineering“ the pl

21、anet with giant mirrors to deflect the suns rays, seeding the oceans with iron to generate alga blooms, or burying greenhouse gases below the sea. Whatever the methods we use, the bottom line is that we will need to cut CO2 emissions by 70% to 80% simply to stabilize atmospheric CO2 concentrations a

22、nd thus temperatures. The quicker we do that, the less unbearably hot our future world will be. 2 Different areas around the world have experienced similar effects of the climate change. （ A） Y （ B） N （ C） NG 3 The warmest year on record occurred in 199 （ A） Y （ B） N （ C） NG 4 The author holds the o

23、pinion that climate changes have started with the dawn of agriculture. （ A） Y （ B） N （ C） NG 5 People have been paying too much attention to the sulphur particles and other pollutants, so they overlooked another problem, global warming. （ A） Y （ B） N （ C） NG 6 Apart from CO2, which traps the suns ra

24、diation, other greenhouse gases like _are also involved in warming. 7 The disrupted natural ecosystem has led to _ of some species and put a lot of species in danger. 8 Human activity could bring about melting of the _ in this century. 9 Preventing “dangerous“ climate change needs joint efforts of b

25、oth industrialized countries and_. 10 The US Bush administration says the scientific uncertainty over the pace of climate change is causes for_. 11 No matter what the methods we use, the final result is that we will need to decrease CO2 emissions by 70% to 80% simply to stabilize_. Section A Directi

26、ons: In this section, you will hear 8 short conversations and 2 long conversations. At the end of each conversation, one or more questions will be asked about what was said. Both the conversation and the questions will be spoken only once. After each question there will be a pause. During the pause,

27、 you must read the four choices marked A, B, C and D, and decide which is the best answer. （ A） Four contestants failed to win prizes. （ B） The man participates in the quiz show. （ C） The woman missed the show. （ D） Five contestants won cell phones. （ A） It gives a 20% discount to all customers. （ B

28、） It is run by Fionas friend, （ C） It hires Fiona as an adviser. （ D） It encourages husbands to shop on their own. （ A） He used to be a workman himself. （ B） He likes to do things himself. （ C） He is professional builder. （ D） He paid workmen to decorate the house. （ A） All the students would like a

29、 formal ball. （ B） Raising the money will be hard. （ C） The festival will begin the year nicely. （ D） The club needs some sports as well. （ A） To do whatever the committee asks of him. （ B） To make decisions in agreement with the committee. （ C） To run the committee according to his own ideas. （ D）

30、To elect the committee chairman himself. （ A） Her husband was teaching English there. （ B） She was born there. （ C） Her children were born there. （ D） She has lived there since 1982. （ A） He has hurt his hand. （ B） He cant fix it. （ C） He is very busy at the moment. （ D） He wants the woman to pay th

31、e money. （ A） Mr. Smith is very kind. （ B） The man should not worry. （ C） She is worried. （ D） She likes Mr. Smith. （ A） They are planning a picnic for the department. （ B） They are having a picnic organized by the department. （ C） They are discussing how to escape from the sun. （ D） They are drinki

32、ng and talking about the weather. （ A） Cathy likes having a picnic on a sunny day. （ B） Alan is expecting a gentle breeze to cool himself off. （ C） They havent had much sunshine recently. （ D） Much to their surprise, bad weather is setting in. （ A） He thinks the department has misjudged the weather

33、situation for the day. （ B） He dismisses the idea of having an annual picnic as silly. （ C） He likes pre-arranged activities and would rather go somewhere on his own. （ D） He prefers having a little doze before drinking. （ A） Two different types of bones in the human body. （ B） How bones help the bo

34、dy move. （ C） How bones continuously repair themselves. （ D） The chemical composition of human bones. （ A） They defend the bone against viruses. （ B） They prevent oxygen from entering the bone. （ C） They break down bone tissue. （ D） They connect the bone to muscle tissue. （ A） They have difficulty i

35、dentifying these ceils. （ B） They arent sure how these cells work. （ C） Theyve learned how to reproduce these cells. （ D） Theyve found similar cells in other species. （ A） To learn how to prevent a bone disease. （ B） To understand differences between bone tissue and other tissue. （ C） To find out ho

36、w specialized bone cells have evolved. （ D） To create artificial bone tissue. Section B Directions: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you hear a question, you m

37、ust choose the best answer from the four choices marked A, B, C and D. （ A） Its people. （ B） Its culture. （ C） Its geography. （ D） Its history. （ A） In the southwest. （ B） Inland from the coast. （ C） In the north. （ D） On the entire west coast. （ A） Hemlock. （ B） Cedar. （ C） Fir. （ D） Pine. （ A） You

38、r heart rate is lowered. （ B） It becomes harder to relax. （ C） You become to tired to sleep. （ D） Sleep rhythms are disrupted. （ A） Failure to rest during the day. （ B） Lack of sleep on weekends. （ C） Vigorous exercise in the evening. （ D） Eating cheese before going to bed. （ A） They might eventuall

39、y cause to lose sleep. （ B） They help produce a neurotransmitter in the brain. （ C） You must not drink milk if you take them. （ D） They make it unnecessary to take naps. （ A） The students in Open University must have left school 20 years ago. （ B） The students in Open University are at least 21 year

40、s old. （ C） The students in Open University are only housewives. （ D） The students in Open University have to pass the entrance examination. （ A） At the airport. （ B） By plane. （ C） Taking the air. （ D） On radio and TV. （ A） 36. （ B） 283. （ C） 3. （ D） 4 to 5. （ A） In 4 or 5 years. （ B） In one year.

41、（ C） In 3 or 4 years. （ D） In 36 weeks. Section C Directions: In this section, you will hear a passage three times. When the passage is read for the first time, you should listen carefully for its general idea. When the passage is read for the second time, you are required to fill in the blanks numb

42、ered from 36 to 43 with the exact words you have just heard. For blanks numbered from 44 to 46 you are required to fill in the missing information. For these blanks, you can either use the exact words you have just heard or write down the 36 There is a time when job seekers simply wrote letters of a

43、pplication. “Just put down your name,【 B1】 _ , age and whether you have passed any【 B2】 _ , was about the average level of advice offered to young people【 B3】 _ for their first jobs when I left school. Tile letter was really just for openers, it was explained, everything else could and should be sav

44、ed for the【 B4】 _ . And in those days of full【 B5】 _ the【 B6】 _ worked. The letter proved that you could write and were 【 B7】 _ for work. Your eager face and【 B8】 _ replies did the rest. Later, as you moved up the ladder, something slightly more sophisticated was called for.【 B9】 _ It alight be call

45、ed the aggressive approach.【 B10】 _ . Or it might be some special feature specially designed for the job in view. There is no doubt, however, that【 B11】 _ . 37 【 B1】 38 【 B2】 39 【 B3】 40 【 B4】 41 【 B5】 42 【 B6】 43 【 B7】 44 【 B8】 45 【 B9】 46 【 B10】 47 【 B11】 Section B Directions: There are 2 passages

46、 in this section. 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. 47 When an invention is made, the inventor has three possible courses of action open to him: he can give the inve

47、ntion to the world by publishing it, keep the idea secret, or patent it. A granted patent is the result of a bargain struck between an inventor and the state, by which the inventor gets a limited period of monopoly and publishes full details of his invention to the public after that period terminate

48、s. Only in the most exceptional circumstances is the lifespan of a patent extended to alter this normal process of events. The longest extension ever granted was to Georges Valensi;. his 1939 patent for color TV receiver circuitry was extended until 1971 because for most of the patents normal life t

49、here was no color TV to receive and thus no hope of reward for the invention. Because a patent remains permanently public after it has terminated, the shelves of the library attached to the patent office contain details of literally millions of ideas that are free for anyone to use and, if older than half a century, sometimes even repatent. Indeed, patent experts often advise anyone wishing to avoid the high cost of conducting a search throug