[外语类试卷]大学英语六级模拟试卷128及答案与解析.doc

1、大学英语六级模拟试卷 128 及答案与解析 一、 Part I Writing (30 minutes) 1 1目前社会上存在着迷信文凭的现象 2造成这一现象的原因 3我对此的观点 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 que

2、stions 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. 2 Hydroelectric Power Hydroelectric power is Americas lead

3、ing renewable energy resource. Of all the renewable power sources, its the most reliable, efficient and economical. Water is needed to run a hydroelectric generating unit. Its held in a reservoir or lake behind a dam, and the force of the water being released from the reservoir through the dam spins

4、 the blades of a turbine. The turbine is connected to the generator that produces electricity. After passing through the turbine, the water re-enters the river on the downstream side of the dam. Hydroelectric plants convert the kinetic energy within falling water into electricity. The energy in movi

5、ng water is produced in the sun, and consequently is continually being renewed. The energy in sunlight evaporates water from the seas and deposits it on land as rain. Land elevation differences result in rainfall runoff, and permit some of the original solar energy to be harnessed as hydroelectric p

6、ower. Hydroelectric power is at present the earths chief renewable electricity source, generating 6% of global energy and about 15% of worldwide electricity. Hydroelectric power in Canada is plentiful and provides 60% of their electrical requirements. Usually regarded as an inexpensive and clean sou

7、rce of electricity, most big hydroelectric projects being planned today are facing a great deal of hostility from environmental groups and local people. The earliest recorded use of water power was a clock, constructed around 250 BC. Since then, people have used falling water to supply power for gra

8、in and saw mills, as well as a host of other uses. The earliest use of flowing water to generate electricity was a waterwheel on the Fox River in Wisconsin in 1882. The first hydroelectric power plants were much more dependable and efficient than the plants of the day that were fired by fossil fuels

9、. This led to a rise in number of small to medium sized hydroelectric generating plants located wherever there was an adequate supply of falling water and a need for electricity. As demand for electricity soared in the middle years of the 20th century, and the effectiveness of coal and oil power pla

10、nts improved, small hydro plants became less popular. The majority of new hydroelectric developments were focused on giant mega-projects. Hydroelectric plants harness energy by passing flowing water through a turbine. The water turbine rotation is delivered to a generator, which generates electricit

11、y. The quantity of electricity that can be produced at a hydroelectric plant relies upon two variables. These variables are (1) the vertical distance that the water falls, called the “head“, and (2) the flow rate, calculated as volume over time. The amount of electricity that is produced is thus pro

12、portional to the head product and the flow rate. So, hydroelectric power stations can normally be separated into two kinds. The most widespread are “high head“ plants and usually employ a dam to stock up water at an increased height. They also store water at times of rain and discharge it during dry

13、 times. This results in reliable and consistent electricity generation, capable of meeting demand since flow can be rapidly altered. At times of excess electrical system capacity, usually available at night, these plants can also pump water from one reservoir to another at a greater height. When the

14、re is peak electrical demand, the higher reservoir releases water through the turbines to the lower reservoir. “Low head“ hydroelectric plants usually exploit heads of just a few meters or less. These types of power station use a weir or low dam to channel water, or no dam at all and merely use the

15、river flow. Unfortunately their electricity production capacity fluctuates with seasonal water flow in a river. Around 2003 people believed almost universally that hydroelectric power was an environmentally safe and clean means of generating electricity. Hydroelectric stations do not release any of

16、the usual atmospheric pollutants emitted by power plants fuelled by fossil fuels so they do not add to global warming or acid rain. Nevertheless, recent studies of the larger reservoirs formed behind dams have implied that decomposing flooded vegetation could give off greenhouse gases equal to those

17、 from other electricity sources. The clearest result of hydroelectric dams is the flooding of huge areas of land. The reservoirs built can be exceptionally big and they have often flooded the lands of indigenous peoples and destroyed their way of life. Numerous rare ecosystems are also endangered by

18、 hydroelectric power plant development. Damming rivers may also change the quantity and quality of water in the rivers below the dams, as well as stopping fish migrating upstream to spawn. In addition, silt, usually taken downstream to the lower parts of a river, is caught by a dam and so the river

19、downstream loses the silt that should fertilize the rivers flood plains during high water periods. Theoretical global hydroelectric power is approximately four times larger than the amount that has been taken advantage of today. Most of the residual hydro potential left in the world can be found in

20、African and Asian developing countries. Exploiting this resource would involve an investment of billions of dollars, since hydroelectric plants normally have very high building costs. Low head hydro capacity facilities on small scales will probably increase in the future as low head turbine research

21、, and the standardization of turbine production, reduce the costs of low head hydroelectric power production. New systems of control and improvements in turbines could lead in the future to more electricity created from present facilities. In addition, in the 1950s and 60s when oil and coal prices w

22、ere very low, lots of smaller hydroelectric plants were closed down. Future increases in the prices of fuel could lead to these places being renovated. 2 What proportion of the worlds electricity supply is provided by hydroelectric power? （ A） 6%. （ B） 9%. （ C） 15%. （ D） 60%. 3 A drawback to low hea

23、d hydroelectric power stations is that they depend on _ . （ A） the solar activity （ B） seasonal water flow （ C） seasonal wind direction （ D） the earths self rotation 4 How far water drops to the turbines in a power station is known as _ . （ A） the heads （ B） the flow rate （ C） the vertical distance

24、（ D） the heights 5 How is the flow rate of a hydroelectric power station quantified? （ A） The depth of the water. （ B） Volume over time. （ C） Speed over time. （ D） The width of the water. 6 When do high head power plants use surplus electricity to transfer water to a second reservoir? （ A） In the mo

25、rning. （ B） At noon. （ C） In the afternoon. （ D） At night. 7 What underwater action can lead to the production of pollution similar to that produced by fossil fuel power stations? （ A） Mass dying of underwater creature. （ B） Recycling of underwater waste products. （ C） Decomposing flooded vegetation

26、. （ D） Abstracting underwater oil. 8 When did hydroelectric power was universally considered as an environmentally safe and clean means of electricity generator? （ A） Around 250 BC. （ B） In 1982. （ C） In the middle .years of 20th century. （ D） Until only recently. 9 The origin of hydroelectric power

27、 is the _ produced when water obeys the laws of gravity. 10 Global hydroelectric power in theory is approximately _ than the amount that has been taken advantage of today. 11 Exploiting hydroelectric power resource can cost billions of dollars, for hydroelectric plants normally have _ . Section A Di

28、rections: 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 p

29、ause, you must read the four choices marked A, B, C and D, and decide which is the best answer. （ A） Shes enjoying the music. （ B） The music will keep her awake. （ C） The music doesnt bother her. （ D） She would prefer a different style of music. （ A） She will take the subway. （ B） She will hurry to

30、the conference. （ C） She will skip the conference end go sightseeing. （ D） She will take a bus. （ A） She thinks big parties are too impersonal. （ B） She would like to invite, friends to a big party. （ C） She feels she has to spend a lot of money in holding big parties. （ D） She would like to be invi

31、ted to small parties. （ A） It is quite unexpected. （ B） She has already got the news. （ C） She has confidence in the man. （ D） It is not exciting to learn about it. （ A） He is not satisfied with the pay. （ B） He is not able to enjoy paid holidays. （ C） The job is not very challenging for him. （ D） T

32、here is no hope of promotion. （ A） He has to change the topic for his composition. （ B） He has fallen behind others in English class. （ C） He hasnt made up his mind as to what to write about. （ D） The book he borrowed will be due tomorrow. （ A） She is against the mans plan. （ B） She thinks it needs

33、a lot of money. （ C） They need some time to think about it. （ D） Its good for his career development. （ A） She should present him a book on music. （ B） The teacher has some interests other than reading. （ C） Its a good idea because the teacher loves reading. （ D） The teacher would like to have a boo

34、k on language teaching. （ A） Apply immediately with any credit card. （ B） Fill out the membership application form. （ C） Pay a membership fee. （ D） Buy certain items in the store. （ A） It bills the customer once a month. （ B） Its a kind of ATM cards. （ C） Its a kind of credit cards. （ D） It takes ou

35、t the money from the customers bank account. （ A） In a grocery store. （ B） In a bank. （ C） In a book store. （ D） In a post office. （ A） The close-ups are perfect. （ B） The dialogues are easy to understand. （ C） Its not boring at all. （ D） It doesnt tell any story. （ A） Because its dark. （ B） Because

36、 it makes her think. （ C） Because there are two-dimensional characters in it. （ D） Because the dialogues in it are superficial. （ A） Gun fights and exploding cars. （ B） Depressing stories. （ C） Intense characters. （ D） Dark background. （ A） Comedy. （ B） Light movie. （ C） Mystery movie. （ D） Action m

37、ovie. 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 the best answer from the four choices marked A, B, C and D. （

38、 A） Telling stories. （ B） Drawing pictures. （ C） Delivering newspapers. （ D） Joining the army. （ A） He studied cartooning. （ B） He stayed at home. （ C） He went abroad. （ D） He worked for a company. （ A） He was born in Chicago in 1910. （ B） He ever sold newspapers in Chicago. （ C） He made several fil

39、ls with an old camera. （ D） He end his brother set up a company in 1932. （ A） Its because there are many developing nations. （ B） Ws bemuse people use too many man-made materials. （ C） Its because we have more and more industry. （ D） Its because we are building more vehicles. （ A） Industry. （ B） Hea

40、lth. （ C） The future of our children. （ D） Clean air. （ A） Man knows where the society is going. （ B） People dont welcome the rapid development of modern society. （ C） The speaker is worried about the future of our modern society. （ D） Man can do nothing about the problem of pollution. （ A） They are

41、 leading in the game. （ B） The score is really close. （ C） The Dream Team is way behind. （ D） They win the game. （ A） Its made up of professional athletes. （ B） Its made up of college players. （ C） Its made up of both professional and college players. （ D） Its made up of young athletes. （ A） He was

42、injured in a fight and had to leave the game. （ B） He fought with another player. （ C） He got in a fight with a fan and was thrown out of the game. （ D） He led his team to success. （ A） They drank a special beverage made from Japanese herbs. （ B） They had uncooked fish the night before the game. （ C

43、） They had a massage from head to foot to relax their muscles. （ D） Some players were injured before the game. 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 i

44、s read for the second time, you are required to fill in the blanks numbered 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

45、 down the 37 Many workers depend on plans 【 B1】 by their employers to help pay for their retirement. There are two major kinds of retirement plans. One is defined by what is paid out, the other by what is paid in. The first is called a defined 【 B2】 plan, or pension. It provides set 【 B3】 based on t

46、he number of years an 【 B4】 has worked: These plans often pay for health care and other costs. They might also provide money to family members when the 【 B5】 dies. Pensions, however, can be a big cost to employers. In the United States, the change from a 【 B6】 economy to a service economy has result

47、ed in fewer and fewer 【 B7】plans. The other major kind of retirement plan is called a defined 【 B8】 plan. Two things define how much a worker will get at retirement. 【 B9】 . One popular version is a four-oh-one-k plan, named after a part of the tax law. 【 B10】 . But some plans are very complex. An e

48、asier way for small employers to offer retirement savings is through a Savings Incentive Match Plan. 【 B11】 . 37 【 B1】 38 【 B2】 39 【 B3】 40 【 B4】 41 【 B5】 42 【 B6】 43 【 B7】 44 【 B8】 45 【 B9】 46 【 B10】 47 【 B11】 Section A Directions: In this section, there is a short passage with 5 questions or incom

49、plete statements. Read the passage carefully. Then answer the questions or complete the statements in the fewest possible words. 48 One of the founding fathers of the Internet has predicted the end of traditional television. Vint Cerf, who helped to build the Internet while working as a researcher in America, said that television was approaching its“ iPod moment“. In the same way that people now download their favorite music onto their iPod, he said that viewers would soon be downloading most o