[外语类试卷]大学英语六级模拟试卷623及答案与解析.doc

1、大学英语六级模拟试卷 623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 short essay entitled How to Deal With Pressure ? You should write at least 150 words following the outline given below: 1. 现如今大学生 压力过大，过激行为频发 2大学生压力过大的原因 3如何解决 How to Deal With Pres

2、sure? 二、 Part II 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 attached to the passage. For questions 1-4, mark： Y (for YES) if the statement agrees with the information given in t

3、he 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. 1 Global Warming: Causes, Effects and Solutions What Causes Global Warming? Carbon dioxide and other air pollutants in the atmosphere like a th

4、ickening blanket, trap the suns heat and cause the planet to warm up. Coal-burning power plants are the largest U.S. source of carbon dioxide pollution they produce 2.5 billion tons every year. Automobiles, the second largest source, create nearly 1.5 billion tons of CO2annually. Heres the good news

5、: Technologies exist today to make cars run cleaner and bum less gas, modernize power plants and generate electricity from nonpolluting sources, and cut our electricity use through energy efficiency. It is sure that these solutions are put to use. Is the Earth Really Getting Hotter? Although local t

6、emperatures fluctuate naturally over the past 50 years, the average global temperature has increased at the fastest rate in recorded history. And experts think the trend is accelerating: The 10 hottest years on record have all occurred since 1990. Scientists say that unless we curb global warming em

7、issions, average U.S. temperatures could be 3 to 9 degrees higher by the end of the century. Are Warmer Temperatures Causing Bad Things to Happen? Global warming is already causing damage in many parts of the United States. In 2002, Colorado, Arizona and Oregon endured their worst wildfire seasons e

8、ver. The same year, drought created severe dust storms in Montana, Colorado and Kansas, and floods caused hundreds of millions of dollars in damage in Texas, Montana and North Dakota. Since the early 1950s, snow accumulation has declined 60 percent and winter seasons have shortened in some areas of

9、the Cascade Range in Oregon and Washington. Of course, the impacts of global warming are not limited to the United States. In 2003, extreme heat waves caused more than 20,000 deaths in Europe and more than 1,500 deaths in India. And in what scientists regard as an alarming sign of events to come, th

10、e area of the Arctics perennial (常年不断的 ) polar ice cap is declining at the rate of 9 percent per decade. Is Global Warming Making Hurricanes Worse? Global warming doesnt create hurricanes, but it does make them stronger and more dangerous. Because the ocean is getting warmer, tropical storms can pic

11、k up more energy and become more powerful. So global warming could turn, say, a category-3 storm into a much more dangerous category-4 storm. In fact, scientists have found that the destructive potential of hurricanes has greatly increased along with ocean temperature over the past 35 years. What Ar

12、e the Possible Consequences of Global Warming? Global warming is a complex phenomenon, and its full-scale impacts are hard to predict far in advance. But each year scientists learn more about how global warming is affecting the planet, and many agree that certain consequences are likely to occur if

13、current trends continue. Among these: Melting glaciers, early snowmelt and severe droughts will cause more dramatic water shortages in the American West. Rising sea levels will lead to coastal flooding on the Eastern seaboard, in Florida, and in other areas, such as the Gulf of Mexico. Warmer sea su

14、rface temperatures will fuel more intense hurricanes in the southeastern Atlantic and Gulf coasts. Forests, farms and cities will face troublesome new pests and more mosquito-borne diseases. Disruption of habitats such as coral reefs and alpine (高山上的 ) meadows could drive many plant and animal speci

15、es to extinction. Could Global Warming Trigger a Sudden Catastrophe? Recently, researchers and even the U.S. Defense Department have investigated the possibility of abrupt climate change, in which gradual global warming triggers a sudden shift in the Earths climate, causing parts of the world to dra

16、matically heat up or cool down in the span of a few years. In February 2004, consultants to the Pentagon (五角大楼 ) released a report laying out the possible impacts of abrupt climate change on national security. In a worst-case scenario, the study concluded, global warming could make large areas of th

17、e world uninhabitable and cause massive food and water shortages, sparking widespread migrations and war. While this prospect remains highly speculative, many of global warmings effects are already being observed and felt. And the idea that such extreme change is possible underscores the urgent need

18、 to start cutting global warming pollution. What Country Is the Largest Source of Global Warming Pollution? The United States is the largest source of global warming pollution. Though Americans make up just 4 percent of the worlds population, we produce 25 percent of the carbon dioxide pollution fro

19、m fossil-fuel burning by far the largest share of any country. In fact, the United States emits more carbon dioxide than China, India and Japan, combined. Clearly America ought to take a leadership role in solving the problem. And as the worlds top developer of new technologies, we are well position

20、ed to do so we already have the know-how. How Can We Cut Down Global Warming Pollution? Its simple: by reducing pollution from vehicles and power plants. Right away, we should put existing technologies for building cleaner cars and more modem electricity generators into widespread use. We can increa

21、se our reliance on renewable energy sources such as wind, sun and geothermal (土热 ). And we can manufacture more efficient appliances and conserve energy. Why Arent These Technologies More Commonplace Now? While the technologies exist, the corporate and political will to put them into widespread use

22、does not. Many companies in the automobile and energy industries put pressure on the White House and Congress to halt or delay new laws or regulations or even to stop enforcing existing rules that would drive such changes. From requiring catalytic converters to improving gas mileage, car companies h

23、ave fought even the smallest measure to protect public health and the environment. If progress is to be made, the American people will have to demand it. Do We Need New Laws Requiring Industry to Cut Emissions of Global Warming Pollution? The Bush administration is promoting an initiative in which e

24、nergy companies cut emissions only if they choose to do so. As the past 10 years have clearly shown, though, voluntary programs do not stop the growth of emissions. Proposals to cap emissions of carbon dioxide and other heat-trapping pollutants from Americas largest sources power plants, industrial

25、facilities, and transportation fuels are gaining support in Congress. Stricter efficiency requirements for electric appliances will also help reduce pollution. One example is the 30 percent tighter standard now in place for home central air conditioners and heat pumps, a Clinton-era achievement that

26、 will prevent the emission of 51 million metric tons of carbon the equivalent of taking 34 million cars off the road for one year. The new rule survived a Bush administration effort to weaken it when, in January 2004, a federal court sided with an NRDC-led coalition and reversed the administrations

27、rollback. Is It Possible to Cut Power Plant Pollution and Still Have Enough Electricity? Yes. First, we must use more efficient appliances and equipment in our homes and offices to reduce our electricity needs. We can also phase out the decades-old, coal-burning power plants that generate most of ou

28、r electricity and replace them with cleaner plants. And we can increase our use of renewable energy sources such as wind and sun. Some states are moving in this direction: California has required its largest utilities to get 20 percent of their electricity from renewable sources by 2017, and New Yor

29、k has pledged to compel power companies to provide 25 percent of the states electricity from renewable sources by 2013. How Can We Cut Car Pollution? Cost-effective technologies to reduce global warming pollution from cars and light trucks of all sizes are available now. There is no reason to wait a

30、nd hope that hydrogen fuel cell vehicles will solve the problem in the future. Hybrid (混合的 ) gas-electric engines can cut global warming pollution by one-third or more today; hybrid sedans, SUVs and trucks from several automakers are already on the market. But automakers should be doing a lot more:

31、Theyve used a legal loophole to make SUVs far less fuel efficient than they could be; the popularity of these vehicles has generated a 20 percent increase in transportation-related carbon dioxide pollution since the early 1990s. Closing this loophole and requiring SUVs, minivans and pick-up trucks t

32、o be as efficient as cars would cut 120 million tons of carbon dioxide pollution a year by 2010. If automakers used the technology they have right now to raise fuel economy standards for new cars and light trucks to a combined 40 m.p.g., carbon dioxide pollution would eventually drop by more than 65

33、0 million tons per year as these vehicles replaced older models. 2 Technologies today can make cars run on cleaner energy such as nuclear energy or wind energy. （ A） Y （ B） N （ C） NG 3 As local temperatures fluctuate naturally, it is not right to say that the Earth is becoming hotter. （ A） Y （ B） N

34、（ C） NG 4 Global warming may cause some natural disasters such as wild fire and drought to become more severe. （ A） Y （ B） N （ C） NG 5 Global warming can cause hurricane to take place. （ A） Y （ B） N （ C） NG 6 Next to coal-burning power plants,_are the second largest U.S. source of carbon dioxide pol

35、lution. 7 In 2003, extreme heat waves caused more than 20,000 and 1,500 deaths in_ respectively. 8 The American West is likely to suffer from more dramatic_if the trends of melting glaciers, early snowmelt and severe droughts continue. 9 The country that brings about the largest amount of global war

36、ming pollution is_. 10 We can cut down global warming pollution by increasing our reliance on renewable energy source such as_. 11 _are used by several automakers to produce hybrid sedans, SUVs and trucks, which help cut global warming pollution. Section A Directions: In this section, you will hear

37、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, you must read the four choices mark

38、ed A, B, C and D, and decide which is the best answer. （ A） The woman is the mans boss. （ B） The man is the womans husband. （ C） The woman is the headmaster of a school. （ D） The woman wants to know something about a student. （ A） She suggests the man to go to a farther place to trim his hair. （ B）

39、She offers to cut the mans hair herself at the price of 10. （ C） She tells the man a cheaper but busier place to have his hair cut. （ D） She used to trim her hair in a luxurious saloon. （ A） Encourage them. （ B） Stop them immediately. （ C） Give some explanation. （ D） Leave them alone. （ A） The man w

40、as the only survivor of an air crash. （ B） People on board were frightened and tried to escape. （ C） The man has always been very lucky in accidents. （ D） A few passengers came back home safe and sound. （ A） He was taking pictures of the campus. （ B） His photographs were on the evening news. （ C） He

41、 went to see a film on campus. （ D） His television appearance was unintentional. （ A） He didnt know the woman was late for work. （ B） He asked why the woman wasnt there on time. （ C） He doesnt have a habit of being on time, either. （ D） He wants the woman to keep a habit of being punctual. （ A） They

42、 both graduated from art schools. （ B） They majored in different areas of art. （ C） They are equally competent for the job. （ D） They are both willing to draw the posters. （ A） Public buses are fast and cheap. （ B） Parking is becoming a big problem. （ C） Buses and taxis are easy to find parking. （ D

43、） People can find nowhere to park their cars. （ A） Where they should move. （ B） How to negotiate with the landlord. （ C） How to fight the increase. （ D） Whether to accept an increase in rent or move. （ A） Stay and negotiate or move. （ B） Buy a laptop or accept the increase. （ C） Move closer to the s

44、chool or the subway. （ D） They have no choice but to move. （ A） It is close to the school. （ B） It is quiet and good for sleep. （ C） It has convenient facilities. （ D） The rental agreement is good. （ A） She has seen a doctor recently. （ B） Shes concerned about medical care. （ C） Shes unable to atten

45、d the study session. （ D） She mentions the need for some medical tests. （ A） To suggest changes in the tuition fees. （ B） To improve the study skills of university students. （ C） To give people the opportunity to speak with a politioian. （ D） To discuss graduation requirements for political science

46、majors. （ A） Preparing for an important test. （ B） Funding for university education. （ C） Winning the confidence of voters. （ D） Graduate school application procedures. （ A） Suggest a topic for a research paper. （ B） Tell her what to study for the history test. （ C） Write a favorable letter of recom

47、mendation. （ D） Advise her about how to run an election campaign. 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 must choose t

48、he best answer from the four choices marked A, B, C and D. （ A） He had psychic powers. （ B） He was an educated man. （ C） He went to school at the age of six. （ D） He died in 1929. （ A） Peoples health. （ B） Peoples lives and futures. （ C） The end of the world. （ D） The Great Depression of 1929. （ A）

49、To see films. （ B） To read books in the library. （ C） To attend lectures. （ D） To visit the Association. （ A） Light speed is millions of times faster than sound speed. （ B） Light speed is a million times slower than sound speed. （ C） Light speed is about millions of times faster than sound speed. （ D） Light speed is about a million times faster than sound speed. （ A） You hear the gun before you see the smoke. （ B） You see the smoke before you hear the gun. （ C） The sound of the gun will