大学英语六级256及答案解析.doc

1、大学英语六级 256 及答案解析(总分：448.02，做题时间：132 分钟)一、Part I Writing (3(总题数：1，分数：30.00)1.For this part, you are allowed thirty minutes to write a letter of complaint to the consumers association of the city. You should write at least 150 words, and base your letter on the situation given below: 1你于 2006 年 1 月 1

2、日在本市 XX 商场买了部 XX 牌手机。 2等回家后你发现这部手机里已经存贮了一些陌生的电话号码。也就是说这部手机是被使用过的。当你返回该商场要求退货时，售货员不承认此手机是使用过的，也拒绝退货。 3要求市消费者协会对此事进行调查，维护你的利益，并留下你的联系方式。 （分数：30.00）_二、Part II Reading C(总题数：1，分数：71.00)When people think about air pollution, they usually think about smog, acid rain, CFCs, and other forms of outdoor air p

3、ollution. But do you know that air pollution also can exist inside homes and other buildings? It can, and every year, the health of many people is affected by chemical substances present in the air within buildings. A great deal of research on pollution is being conducted at laboratories and univers

4、ities. The goals of the research are to find solutions and to educate the public about the problem. Two places where this type of work is being done are LBNL and the University of California, Berkeley. Lets take a closer look at the various types of air pollution, the effects that they have on peopl

5、e, and what is being (or not being) done to correct the problem. What is Air Pollution? Air is the ocean we breathe. Air supplies us with oxygen which is essential for our bodies to live. Air supplies us with oxygen which is essential for our bodies to live. Air is 99.9% nitrogen (氮气), oxygen, water

6、 vapor and inert(惰性的) gases. Human activities can release substances into the air, some of which can cause problems for humans, plants, and animals. There are several main types of pollution and well-known effects of pollution which are commonly discussed. These include smog, acid rain, the greenhou

7、se effect, and “holes“ in the ozone layer. Each of these problems has serious implications for our health and well-being as well as for the whole environment. One type of air pollution is the release of particles (微粒) into the air from burning fuel for energy. Diesel smoke (柴油烟) is a good example of

8、 this particulate matter. The particles are very small pieces of matter measuring about 2.5 microns or about .0001 inches. This type of pollution is sometimes referred to as “black carbon“ pollution. The exhaust from burning fuels in automobiles, homes, and industries is a major source of pollution

9、in the air. Some authorities believe that even the burning of wood and charcoal (木炭) in fireplaces and barbeques can release significant quantities of soot (油烟) into the air. Another type of pollution is the release of noxious gases, such as sulfur dioxide, carbon monoxide, nitrogen oxides, and chem

10、ical vapors. These can take part in further chemical reactions once they are in the atmosphere, forming smog and acid rain. Pollution also needs to be considered inside our homes, offices, and schools. Some of these pollutants can be created by indoor activities such as smoking and cooking. In the U

11、nited States, we spend about 80-90% of our time inside buildings, and so our exposure to harmful indoor pollutants can be serious. It is therefore important to consider both indoor and outdoor air pollution. Outdoor Air Pollution Smog is a type of large-scale outdoor pollution. It is caused by chemi

12、cal reactions between pollutants derived from different sources, primarily automobile exhaust and industrial emissions. Cities are often centers of these types of activities, and many suffer from the effects of smog, especially during the warm months of the year. Additional information about smog an

13、d its effects are available from the Air Quality Management District (AQMD) in southern California. For each city, the exact causes of pollution may be different. Depending on the geographical location, temperature, wind and weather factors, pollution is dispersed differently. However, sometimes thi

14、s does not happen and the pollution can build up to dangerous levels. A temperature inversion occurs when air close to the earth is cooler is 99.9% nitrogen (氮气), oxygen, water vapor and inert(惰性的) gases. Human activities can release substances into the air, some of which can cause problems for huma

15、ns, plants, and animals. There are several main types of pollution and well-known effects of pollution which are commonly discussed. These include smog, acid rain, the greenhouse effect, and “holes“ in the ozone layer. Each of these problems has serious implications for our health and well-being as

16、well as for the whole environment. One type of air pollution is the release of particles (微粒) into the air from burning fuel for energy. Diesel smoke (柴油烟) is a good example of this particulate matter. The particles are very small pieces of matter measuring about 2.5 microns or about .0001 inches. T

17、his type of pollution is sometimes referred to as “black carbon“ pollution. The exhaust from burning fuels in automobiles, homes, and industries is a major source of pollution in the air. Some authorities believe that even the burning of wood and charcoal (木炭) in fireplaces and barbeques can release

18、 significant quantities of soot (油烟) into the air. Another type of pollution is the release of noxious gases, such as sulfur dioxide, carbon monoxide, nitrogen oxides, and chemical vapors. These can take part in further chemical reactions once they are in the atmosphere, forming smog and acid rain.

19、Pollution also needs to be considered inside our homes, offices, and schools. Some of these pollutants can be created by indoor activities such as smoking and cooking. In the United States, we spend about 80-90% of our time inside buildings, and so our exposure to harmful indoor pollutants can be se

20、rious. It is therefore important to consider both indoor and outdoor air pollution. Outdoor Air Pollution Smog is a type of large-scale outdoor pollution. It is caused by chemical reactions between pollutants derived from different sources, primarily automobile exhaust and industrial emissions. Citi

21、es are often centers of these types of activities, and many suffer from the effects of smog, especially during the warm months of the year. Additional information about smog and its effects are available from the Air Quality Management District (AQMD) in southern California. For each city, the exact

22、 causes of pollution may be different. Depending on the geographical location, temperature, wind and weather factors, pollution is dispersed differently. However, sometimes this does not happen and the pollution can build up to dangerous levels. A temperature inversion occurs when air close to the e

23、arth is cooler lives. We work, study, eat, drink and sleep in enclosed environments where air circulation may be restricted. For these reasons, some experts feel that more people suffer from the effects of indoor air pollution than outdoor pollution. There are many sources of indoor air pollution. T

24、obacco smoke, cooking and heating appliances, and vapors from building materials, paints, furniture, etc. cause pollution inside buildings. Radon is a natural radioactive gas released from the earth, and it can be found concentrated in basements in some parts of the United States. Pollution exposure

25、 at home and work is often greater than outdoors. The California Air Resources Board estimates that indoor air pollutant levels are 25-62% greater than outside levels and can pose serious health problems. Air pollution can affect our health in many ways with both short-term and long-term effects. Di

26、fferent groups of individuals are affected by air pollution in different ways. Some individuals are much more sensitive to pollutants than are others. Young children and elderly people often suffer more from the effects of air pollution. People with health problems such as asthma, heart and lung dis

27、ease may also suffer more when the air is polluted. The extent to which an individual is harmed by air pollution usually depends on the total exposure to the damaging chemicals, i.e., the duration of exposure and the concentration of the chemicals must be taken into account. Research into the health

28、 effects of air pollution is ongoing. Medical conditions arising from air pollution can be very expensive. Healthcare costs, lost productivity in the workplace, and human welfare impacts cost billions of dollars each year. In many countries in the world, steps are being taken to stop the damage to o

29、ur environment from air pollution. Scientific groups study the damaging effects on plant, animal and human life. Legislative bodies write laws to control emissions. Educators in schools and universities teach students, beginning at very young ages, about the effects of air pollution. （分数：71.00）(1).M

30、ain types of pollution include smog, acid rain, the greenhouse effect, and “holes“ in the ozone layer.（分数：7.10）A.YB.NC.NG(2).Nitrogen is one of noxious gases.（分数：7.10）A.YB.NC.NG(3).In the United States, people usually spend about 80-90% of our time inside buildings.（分数：7.10）A.YB.NC.NG(4).Smog is cau

31、sed by chemical reactions between pollutants derived from different sources, primarily automobile exhaust and industrial emissions.（分数：7.10）A.YB.NC.NG(5).The Greenhouse Effect is generally believed to come from the_ in the atmosphere.（分数：7.10）_(6).The water (or snow) can become acidified when a poll

32、utant combines with_ in the air.（分数：7.10）_(7).Ultraviolet radiation is known to cause skin cancer and has damaging effects on（分数：7.10）_(8)._is called “black carbon“ pollution.（分数：7.10）_(9).A temperature inversion occurs when_.（分数：7.10）_(10).The ozone layer in the stratosphere_.（分数：7.10）_三、Listening

33、Comprehens(总题数：1，分数：15.00)A.Swimming.B.Playing basketball.C.Boating.D.Playing volleyball.A.Around 6 p.mB.Around 7 p.mC.Around 7:30 p.mD.Around 8:30 p.mA.He works three times as much as he did before.B.He has two free days for every three days he works.C.He works three nights every two weeks.D.He has

34、 twice as much work as he used to have.A.Because he forgot her phone number.B.Because she hasnt seem him lately.C.Because he never invites her to dinner.D.Because he doesnt phone ahead before visiting.A.To clean up her room.B.To get her report back.C.Not to wait for him.D.Not to worry about her rain

35、coat.A.The exam was difficult for the woman.B.The test consisted of one page.C.The woman found the exam easy.D.The woman completed the exam in one hour.A.Coffee.B.Tea.C.Water.D.Coca-Cola.A.The problem may have been a very complicated one.B.The man can solve the problem himself.C.Even Linda can not s

36、olve the problem.D.The woman thinks that the problem is too easy.四、Section A(总题数：2，分数：10.00)A.Redwood trees.B.Forest fires.C.San Francisco.D.Survival skills.A.It has a good view of the coast.B.It is near San Francisco.C.It has no admission fee.D.It can be seen in one hour.A.800 years.B.400 years.C.5

37、50 years.D.2,000 years.A.Coastal isolation.B.Resistant bark and damp climate.C.Absence of natural enemies.D.Cool weather and daily fog.A.The food in the kitchen.B.The TV Programme.C.The roommate of the man.D.The coming exam.A.Because they are not friends.B.Because he failed last exam.C.Because they

38、are not in the same class.D.Because she has never told him about that.A.Because its too late.B.Because he doesnt know her.C.Because she is the best student.D.Because she is a friend of the woman.五、Section B(总题数：3，分数：30.00)A.Planets.B.The moon.C.The sun.D.Gods.A.Twelve lunar months.B.The home of the

39、moon goddess.C.A mentally ill person affected by the moon.D.A guard against the moon.A.The Gods of Rome.B.Ancient Beliefs.C.The Rhythm of the Universe.D.Gods in Our Words.A.Social work.B.Medical care.C.Applied physics.D.Special education.A.The timely advice from her friends and relatives.B.The two-y

40、ear professional training she received.C.Her determination to fulfill her dream.D.Her parents consistent maral support.A.To get the funding for the hospitals.B.To help the disabled children there.C.To train therapists for the children there.D.To set up an institution for the handicapped.A.They are d

41、elighted because they can enjoy the scenery while driving.B.They are frightened because traffic accidents are frequent.C.They are irritated because the bridge is jammed with cars.D.They are pleased because it saves them much time.A.They dont have their own cars to drive to work.B.Many of them are ro

42、mantic by temperament.C.Most of them enjoy the drinks on the boat.D.They tend to be more friendly to each other.A.Many welcome the idea of having more bars on board.B.Many prefer the ferry to maintain its present speed.C.Some suggest improving the design of the deck.D.Some object to using larger lux

43、ury boats.六、Section C(总题数：1，分数：10.00)Can we generate the new cultural attitudes required by our technological virtuosity? History is not very reassuring here. It has taken centuries to learn how to live (36) 1in the family, the tribe, the city, the state, and the nation. Each new (37) 2of human sens

44、itivity and loyalty has taken generations to become firmly (38) 3in the human mind. And now we are forced into a quantum leap from the mutual suspicion and (39) 4that have marked the past relations between peoples into a world in which mutual respect and comprehension are necessary. Even events of r

45、ecent decades provide little basis for (40) 5. Increasing physical proximity has brought no millennium in human relations. If anything, it has appeared to intensify the divisions among people rather than to create a broader (41) 6. Every new reduction in physical distance has made us more painfully

46、aware of the psychic distance that divides people and has increased alarm over real or imagined differences. If today people occasionally choke on what seem to be (42) 7 differences between rich and poor, male and female, specialist and non-specialist within cultures, what will happen tomorrow when

47、people must assimilate and cope with still greater (43) 8 in life styles? (44) 9. Time and space have long cushioned intercultural encounters, confining them to touristic exchanges. But this insulation is rapidly wearing thin. (45) 10. There we will be surrounded by foreigners for long periods of time, working with others in the closest possible relationships. (46) 11. （分数：10.00）填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_