[外语类试卷]大学英语六级模拟试卷759（无答案）.doc

《[外语类试卷]大学英语六级模拟试卷759（无答案）.doc》由会员分享，可在线阅读，更多相关《[外语类试卷]大学英语六级模拟试卷759（无答案）.doc（25页珍藏版）》请在麦多课文档分享上搜索。

1、大学英语六级模拟试卷 759（无答案）一、Part I Writing (30 minutes)1 Can Computers Replace Teachers?1随着计算机技术越来越多地用于教学中，有人认为计算机可能取代教师2你的看法如何二、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 attac

2、hed 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) if the statement contradicts the information given in the passage;NG (for NOT GIVEN) if the information is not given in the passage.1 Keeping the Net SecureOn Septembe

3、r 11 traditional telephone providers did a heroic job of struggling to restore service. When the World Trade Center towers fell, they severely damaged a Verizon central office with 350,000 voice lines and 3.5 million data circuits carrying the financial information that is the lifeblood of Wall Stre

4、et firms. Verizon employees and those of many other telecommunications carders worked night and day, alongside the firemen, the police, and volunteers, at their own recovery job. In about a week they had rerouted some two million data circuits, restored switches, and installed temporary power suppli

5、es. The other 1.5 million circuits originated in buildings that no longer exist.In the days after the attack the number of voice calls in the five boroughs of New York City doubled, from the normal 115 million a day to more than 230 million. For the next six days Verizon waived charges for its pay p

6、hones in Manhattan. On a single day following the disaster residents placed some 22,000 local calls free of charge from regular sidewalk pay phones below Canal Street, and Williams Communications switched five million voice calls in the metropolitan area-three times the average daily volume. AT Yaho

7、os PC to Phone calling service increased by 59 percent. The performance of these voice-over-IP services suggests that in only a handful of years most voice traffic is likely to be carded on the Internet.Why did the Internet work so well in the face of huge volume? Because its “distributed“ technolog

8、y is inherently robust. “Normal“ phone connections, whether by means of wired line networks or by wireless cellular networks, open a specific circuit, or channel, connecting the person who is called and the caller. Just as if a superhighway lane were opened for one car only, the circuit remains dedi

9、cated to the conversation even if no one is speaking at the moment. If too many circuits are requested at one time, the system blocks calls.In contrast, Internet messages dont travel on designated circuits. Instead, the messages are coded in is and Os, and then disassembled into packets of data. The

10、 packets go out from the PC down the phone line and into the maze of interconnected fibers that envelops every metropolitan area of every developed country in the world. Like cars on a superhighway, packets share lanes on the Net.Each packet contains a destination address. As the packet moves into t

11、he maze, it encounters a router that selects the next step in the network. If the router senses congestion on one route, it selects another. The AOL instant-message packets could work their way around the jams and outage of the voice network and find their destinations in seconds.One lesson from Sep

12、tember 11 is that in order to maintain an effective communications system in the face of any calamity, we should promote and protect the Internet as a primary network, encouraging the private sector and using the resources of the public sector to make it faster, more robust, ubiquitous, and better i

13、ntegrated with other media. This policy would be consistent with the Internets original development as an aspect of national security.Not many creators of Internet technology or leaders of Internet companies have been seriously interested in world affairs. Indeed, only yesterday many people imagined

14、, naively, that the rise of the medium meant the end of government, the triumph of libertarian visions, and the dawning of a new age of spontaneous self-organization. In the long run the Nets emphasis on liberty can be fused with the needs of a civil equitable, ordered state. But in the short run we

15、 need practical steps to help keep the Internet secure. The worlds citizens, businesses, and governments should come together to take two actions.First, Internet access should be made truly global. In less developed countries this means expanding communications systems so that more people have expos

16、ure to and access to information from the outside world. Obviously, communications technology does not by itself end conflict or convert nations to democracy. But it helps, and those goals are easier to reach with a modem communications system than without one. However our current war against terror

17、ism ends, along the way the United States and its allies will undoubtedly make a variety of economic promises to the Central Asian states whose support we need. It would be better to direct aid toward thought-out goals than to grant it slapdash. A $ 10 billion investment fund for communications impr

18、ovements throughout the developing world, managed by an independent board and funded half by private institutions and half by governments, would be a wise use of our resources.In developed countries universal access means ensuring that businesses and citizens can all get high-speed connections to th

19、e Internet, much as they now have universal dial-tone access to the traditional telephone system. The United States has a long history of subsidizing the growth of a democratically available communications system. In keeping with the established universal service policy, business and suburban custom

20、ers of telephone services are “overcharged“ some $ 30 billion each year in order to subsidize basic telephone rates for rural customers. Diverting $ 10 billion of this universal-service funding could eventually make broadband service available on a near universal basis. Consumers could draw on a fed

21、eral fund for whichever competing service they chose. The fund would pay a high proportion of the total cost for poor and rural users, a low one or none at all for rich users. Andy Grove, the chairman of Intel, recently called for a similar investment plan.Second, the Internets defenses need to be s

22、trengthened. The networks that compose its backbone should be encouraged with strong incentives to develop redundant interconnection points and diverse paths. The Internets conceptual design makes it inherently resilient, but its physical structure and hardware need to be more secure than they are n

23、ow. The one or two dozen essential crossroads of the Internet are basically collections of computers in buildings. These are vital nodes of our national security, and they ought to be as carefully protected as our military installations. The Internet has a rising number of co-location facilities whe

24、re many fiber cables are aggregated. If any of them goes down, traffic can be interrupted for long periods. This became clear last summer in Baltimore, when a train derailment damaged a substantial fiber link and affected the flow of Internet traffic around the globe.Every essential node should have

25、 a backup. Internet messages are now carried mainly on fiber-optic systems. These systems should be backed up by microwave and satellite-transmission systems.The terrorists did not directly target our communications networks, but those networks are an integral part of the democratic capitalism that

26、they did attack. And we can use those networks to help fight back.2 The data circuits which had been damaged on September 11 were rerouted more than a half in about a week. （A）Y（B） N（C） NG3 There are fewer voice calls in New York in the days after the attack. （A）Y（B） N（C） NG4 In all coastal cities,

27、cell phone net works could not keep up with demand. （A）Y（B） N（C） NG5 More than half of Americans now use the Internet. （A）Y（B） N（C） NG6 Some carriers pushed their voice traffic over the Internet because _. 7 The system blocks calls when _. 8 We should promote and protect the Internet as a primary ne

28、twork in order to _. 9 The second action which should be taken to keep the Internet secure is _. 10 A substantial fiber link damaged by a train derailment affected _. 11 Fiber-optic system should be backed up by _. Section ADirections: In this section, you will hear 8 short conversations and 2 long

29、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 marked A, B, C and D, and decide whic

30、h is the best answer.（A）He likes the current temperature.（B） He wishes the weather would get hotter.（C） He cooked a bit of the food.（D）He knows he will like the food.（A）They get a bargain right away.（B） They have a look at the advertisement.（C） They throw away their TV set.（D）They go and buy a big T

31、V set.（A）Apologize when Mary is less angry.（B） Return Marys notes in a few days.（C） Write Mary a note of apology.（D）Let her talk to Mary about the situation.（A）80.（B） 160.（C） 20.（D）40.（A）$ 12.（B） $ 4.（C） $ 10.（D）$ 8.（A）Whether she Will go all depends on the weather.（B） She asks the man to guess and

32、bet.（C） Surely she will not go.（D）She is eager to go.（A）They both enjoyed watching the game.（B） The man thought the results were beyond their expectations.（C） They both felt good about the results of the game.（D）People were surprised at their winning the game.（A）How to use a camera.（B） How to use a

33、washer.（C） How to use a keyboard.（D）How to use a tape recorder.（A）She had moved out of the old address.（B） She ignored it.（C） The library didnt try to inform her about it.（D）The landlord refused to give the books back to her.（A）She was too busy to remember if she had returned them.（B） She didnt retu

34、rn them in fact.（C） She gave them to the landlord to return.（D）She did return them but somehow the library made a mistake.（A）Pay for the lost books.（B） Reconfirm with the library that the books were returned.（C） Check to see if the books are still at her home.（D）Check to see if the books are at Henz

35、ers place.（A）Receptive.（B） Friendly.（C） Impulsive.（D）Brave.（A）France.（B） Italy.（C） Germany.（D）America.（A）Reading.（B） Writing.（C） Speaking.（D）Listening.（A）Liverpool.（B） London.（C） Scotland.（D）Welsh.Section BDirections: In this section, you will hear 3 short passages. At the end of each passage, you w

36、ill 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.（A）It is extremely dangerous to fly in the dark.（B） Noise regulations restrict the hours of airport operation.（C

37、） Some of its runways are not in good condition.（D）Cargo planes produce more disturbing noises at night.（A）It might increase airport capacity.（B） It might lower property values.（C） It might lead to effective modification of existing jet engines.（D）It might cause more transportation costs to and from

38、 airports.（A）The effects of noise on the quality of life.（B） The role of air traffic restrictions.（C） The production of quieter engines.（D）The economic aspects of noise reduction.（A）The plane cant fly without air.（B） The plane needs air for its refueling.（C） It meets the passengers needs.（D）It meets

39、 the pilots needs.（A）The plane flies at high altitudes.（B） The plane is filled with air.（C） The metal structure of the plane is very strong.（D）A small part of the plane cracks.（A）To find out exactly what happens.（B） To save fuel to fly longer.（C） To find out where the big stone is.（D）To fly even mor

40、e slowly.（A）Germany.（B） Japan.（C） The U.S.（D）The U.K.（A）By doing odd jobs at weekends.（B） By working long hours every day.（C） By putting in more hours each week.（D）By taking shorter vacations each year.（A）To combat competition and raise productivity.（B） To provide them with more job opportunities.（C

41、） To help them maintain their living standard.（D）To prevent them from holding a second job.（A）Change their jobs.（B） Earn more money.（C） Reduce their working hours.（D）Strengthen the governments role.Section CDirections: In this section, you will hear a passage three times. When the passage is read fo

42、r 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 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 informat

43、ion. For these blanks, you can either use the exact words you have just heard or write down the 36 A happy marriage apparently is good medicine, but hostile spouses may be harmful to one anothers health. Couples in 【B1】_ marriages take longer than the happily married to heal from all kinds of wounds

44、, from minor scrapes or【B2】_ injuries to major surgery, suggests a study over the weekend. And the health toll taken by a stressful job seems to be【B3】_ when the worker has a pleasurable home life. This new research, reported at an American Psychosomatic Society meeting, adds to growing evidence tha

45、t marriage has an【B4】_ on health. In the wound healing study, 42 couples agreed to let researchers use a suction【B5】_ to create several minor blister wounds on their skin in two【B6】_ about two months apart. The first time, couples were told to discuss a【B7】_ topic; the next time they were given half

46、 an hour to 【B8】_ an issue or two on which they disagreed. Their discussions were monitored. Researchers also【B9 】_ . The outcome: “Even a simple discussion of a disagreement slows wound healing,“ says psychologist Janice Kieeolt-Glaser, who did the study with co author Ronald Glaser of Ohio State U

47、niversity College of Medicine. Overall,【B10】_ . Hostile couples peppering both discussions with criticism, sarcasm and put-downshealed the slowest. It took them 40% longer, or two more days, to heal, and they also produced less of the proteins linked to healing.【B11】_ , Kiecoh-Glaser adds. “Such str

48、ess before surgery matters greatly,“ she says, and the effect could apply to healing from any injury.37 【B1 】38 【B2 】39 【B3 】40 【B4 】41 【B5 】42 【B6 】43 【B7 】44 【B8 】45 【B9 】46 【B10 】47 【B11 】Section ADirections: In this section, there is a passage with ten blanks. You are required to select one word

49、 for each blank from a list of choices given in a word bank following the passage. Read the passage through carefully before making your choices. Each choice in the bank is identified by a letter. Please mark the corresponding letter for each item with a single line through the center. You may not use any of the words in the bank more than once.47 Today, some critics argue that progress on environmental problems has been elusive (难以捉摸的，难以理解的).