[外语类试卷]大学英语四级模拟试卷503及答案与解析.doc

1、大学英语四级模拟试卷 503及答案与解析 一、 Part I Writing (30 minutes) 1 For this part, you are allowed thirty minutes to write a composition on the topic: Colleges Have Opened Their Doors Wider. You should write at least 120 words, and base your composition on the outline given in Chinese below: 1. 高校扩招是一悠扬好事； 2. 高校扩

2、招会带来一些问题； 3. 我的观点。 Colleges Have Opened Their Doors Wider 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 1-7, mark： Y (for YES) if

3、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 Computer Crime A computer crime is generally defined as one that involves the use of comp

4、uters and software for illegal purposes. This doesnt mean that all the crimes are new types of crime. On the contrary, many of these crimes, such as embezzlement of funds, the alteration of records, theft, vandalism, sabotage, and terrorism, can be committed without a computer. But with a computer,

5、these offenses can be carried out more quickly and with less chance that the person responsible for the crime will be discovered. Computer crimes are on the rise and have been for the last twelve years. Just how much these computer crimes cost the American public is in dispute, but estimates range f

6、rom $ 3 billion to $ 5 billion annually. Even the FBI, which attempts to keep track of the growth or decline of all kinds of crimes, is unable to say precisely how large a loss is involved; however, it estimates that the average take from a company hit by computer crime is $ 600,000. A number of rea

7、sons are given for the increase in computer crime: (A) more computers in use and, thus, more people who are familiar with basic computer operation; (B) more computers tied together in satellite and other data-transmission networks; and (C) the easy access of microcomputers to huge mainframe data bas

8、es. The Criminal Movies and newspaper stories might lead us to believe that most computer crimes are committed by teenage “hackers“-brilliant and basically good children who let their imagination and technical genius get them into trouble. But a realistic look at the crimes reveals that the offender

9、 is likely to be an employee of the firm against which the crime has been committed, i. e. , an “insider“. Difficulty of Detection and Prevention Given the kind of person who commits a computer crime and the environment in which the crime occurs, it is often difficult to detect who the criminal is.

10、First of all, the crime may be so complex that months or years go by before anyone discovers it. Second, once the crime has been revealed, it is not easy to find a clear trail of evidence that leads back to the guilty party. After all, looking for “weapons“ or fingerprints does not occur as it might

11、 in the investigation of more conventional crimes. Third, there are usually no witnesses to the computer crime, even though it may be taking place in a room filled with people. Who is to say if the person at the next terminal, calmly keying in data, is doing the companys work or committing a crimina

12、l act? Fourth, not enough people in management and law enforcement know enough about computer technology to prevent the crimes. Authorities have to be familiar with the computers capabilities within a given situation to guard against its misuses. In some large cities, such as Los Angeles, police dep

13、artments have set up specially trained computer crime units. But even when an offender is caught, the investigators, attorneys (律师 ), judges, or juries may find the alleged crime too complicated and perplexing to handle. More attorneys are specializing in computer law and studying the computers pote

14、ntial for misuse. After a computer crime has been discovered, many companies do not report it or prosecute (起诉 ) the person responsible. A company may not announce the crime out of fear that the pubic will find out the Weaknesses of its computer system and lose confidence in its organization. Banks,

15、 credit card companies, and investment firms are especially sensitive about revealing their vulnerabilities (脆弱性 ) because they rely heavily on customer trust. To avoid public attention, cautious companies will often settle cases of computer tampering out of court. And if cases do go to trial and th

16、e offenders are convicted, they may be punished only by a fine or light sentence because the judge or jury isnt fully trained to understand the nature and seriousness of the crime. Not all companies are timid in apprehending computer criminals. For example, Connecticut General Life Insurance Company

17、 decided it had to get tough on violators. So when the company discovered that one of its computer technicians had embezzled $ 200,000 by entering false benefit claims, it presented it findings to the states attorney and aided in the prosecution of the technician. The technician was found guilty and

18、 sentenced to prison, not just for the computer misuse, but also for grand theft and insurance fraud. Connecticut General now has a policy of reporting all incidents of theft or fraud, no matter how small. 2 The FBI knows exactly how large a loss is involved in computer crimes. （ A） Y （ B） N （ C） NG

19、 3 It has become easy for microcomputer owners to use huge mainframe data bases. （ A） Y （ B） N （ C） NG 4 It is implied in the paragraph 4 that most computer criminals are the employees of the concerned companies. （ A） Y （ B） N （ C） NG 5 Many companies dont report computer crimes because law procedur

20、es against computer crimes usually cost a lot of money. （ A） Y （ B） N （ C） NG 6 When computer crime takes place in a room filled with people, there are usually many witnesses to the crime. （ A） Y （ B） N （ C） NG 7 The passage is mainly about the increase of computer crimes in America and the difficul

21、ties in combating computer crimes. （ A） Y （ B） N （ C） NG 8 Computer crimes are on the rise because more cheap microcomputers are available. （ A） Y （ B） N （ C） NG 9 According to the passage, computer crimes has been on the rise for the last _ years. 10 Connecticut General Life Insurance company is ci

22、ted as _ of companies that took serious measures to fight against computer crimes. 11 Banks, credit card companies, and investment firms are especially sensitive about revealing their vulnerabilities because they place too much reliance on _. Section A Directions: In this section, you will hear 8 sh

23、ort 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 marked A

24、, B, C and D, and decide which is the best answer. （ A） The centre has just opened. （ B） Hes looking forward to using the centre. （ C） The door to the fitness centre is locked. （ D） There are long lines to get into the centre. （ A） The woman is mailing them to Garys old address. （ B） The post office

25、 is sending them to the womans house. （ C） They are being held to Garys apartment. （ D） They are being held at the post office. （ A） She has gotten behind in her work. （ B） Her computer is the latest model. （ C） She keeps her computer at home. （ D） She doesnt have a computer. （ A） Dan isnt a very go

26、od violinist. （ B） Someone else should make the introductions. （ C） There will be other musicians to be introduced. （ D） Its rather late to ask Dan to slow down. （ A） Writing an article. （ B） Studying for a chemistry test. （ C） Shopping for shoes. （ D） Reading a magazine. （ A） Stop bothering the wom

27、an. （ B） Take the womans book with him. （ C） Show the woman how to get to the library. （ D） Ask someone else to go to the library. （ A） He has bad study habits. （ B） He sleeps too much. （ C） He wakes up early. （ D） Hes an excellent student. （ A） The library is closed tonight. （ B） He doesnt know how

28、 to get to the library. （ C） Jean is using his car. （ D） He wont be able to help the woman. （ A） A salesman recommended it. （ B） She saw an advertisement. （ C） Her friend has one. （ D） She bought one before. （ A） One. （ B） Three. （ C） Twelve. （ D） Twenty. （ A） At twelve oclock. （ B） In two hours. （

29、C） In one or two days. （ D） Next week. （ A） Too many private cars. （ B） Too many buses. （ C） Too many trains. （ D） To many taxis. （ A） The government is spending money on some forms of public transport. （ B） Only rich people can use their cars. （ C） Many poorer people need use their cars to make a l

30、iving. （ D） The government needs to spend most money on improving the roads. （ A） The whole economy would collapse. （ B） People would be homeless. （ C） Roads would be improved. （ D） More trains would be used. （ A） The election for senator. （ B） The election for treasurer. （ C） The election for secre

31、tary. （ D） The election for president. 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 fou

32、r choices marked A, B, C and D. （ A） In 1624. （ B） In1642. （ C） In 1720. （ D） In 172 （ A） He was invited for dinner. （ B） He had a question to ask Newton. （ C） He dropped in on his way home. （ D） He just wanted to see Newton. （ A） The maid did not prepare his dinner. （ B） The maid ate the chicken he

33、rself. （ C） Dr. Stukeley ate the chicken. （ D） He had eaten the chicken himself. （ A） 50 cents. （ B） 1 dollar. （ C） 2 dollars. （ D） 15 dollars. （ A） 60 volts. （ B） 110 volts. （ C） 220 volts. （ D） 240 volts. （ A） Call the operator in the hotel. （ B） Dial directly. （ C） Ask the hotel receptionist for

34、help. （ D） Go to the public telephone booth in the hotel. （ A） No one believed radio broadcast. （ B） Jokes on the radio was prohibited. （ C） A panic and the deaths of some people. （ D） Many people feared radios. （ A） The Canadian River. （ B） The Hudson River. （ C） The Mississippi River. （ D） The Ama

35、zon River. （ A） At least 35,000. （ B） About 3,000. （ C） Less than 50,000. （ D） 25,000.00 （ A） Because they wanted to find something to eat. （ B） Because they were afraid. （ C） Because they had to take care of themselves. （ D） Because they had to look after their farms and families. Section C Directi

36、ons: 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 numbered from 36 to 43 with the exact words you have just hea

37、rd. 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 are two types of people in the world. Although they have【 B1】_degrees of health and wealth and other comforts

38、 of life, one becomes happy, and the other becomes【 B2】 _【 B3】 _People who are to be happy fix their attention on the【 B4】 _of things, the pleasant parts of conversation, the fine weather. They enjoy all the【 B5】 _things. Those who are to be unhappy think and speak only of the【 B6】 _things. Therefor

39、e, they are continually【 B7】 _. By their remarks, they sour the pleasures of society, offend many people, and make themselves【 B8】 _everywhere. If this turn of mind were founded in nature, such unhappy persons would be the more to be pitied.【 B9】 _.It grows into a habit, unknown to its possessors. T

40、he habit may be strong,【 B10】 _. I hope this little warning may be of service to them, and help them change this habit.【 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 passage with ten bla

41、nks. You are required to select one word 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 singl

42、e line through the center. You may not use any of the words in the bank more than once. 47 Space is a dangerous place, not only because of meteors(流星 )but also because of rays from the sun and other stars. The atmosphere again【 S1】 _as our protective blanket on earth. Light gets Light, and this is e

43、ssential for plants to make the food which we eat. Heat ,too, makes our environment【 S2】 _. Various kinds of rays come through the air from outer space ,but enormous【 S3】 _of radiation from the sun are【 S4】 _off. As soon as men leave the atmosphere they are【 S5】 _to this radiation but their spacesui

44、ts or the walls of their spacecraft ,if they are inside ,do prevent a lot of radiation damage. Radiation is the greatest known danger to explorers in space. The unit of radiation is called “rem“. Scientists have reason to think that a man can【 S6】 _up with far more radiation than 0.1 rem without bei

45、ng damaged; the figure of 60 rems has been【 S7】 _on. The trouble is that it is extremely difficult to be sure about radiation damage - a person may feel perfectly well ,hut the cells of his or her sex organs may he damaged, and this will not be discovered until the birth of【 S8】 _children or even gr

46、andchildren.【 S9】 _of the Apollo flights have had to cross belts of high amount of rems. So far, no dangerous amounts of radiation have been reported, but the Apollo missions have been quite short. We simply do not know yet how men are going to get on when they spend weeks and months outside the pro

47、tection of the atmosphere, working in a space laboratory. Drugs might help to【 S10】 _the damage done by radiation, but no really effective ones have been found so far. A)missions B)acts C)decay D)quality E)quantities F)shelter G)screened H)deformed I)increase J)agreed K)endurable L)exposed M)behaves

48、 N)decrease O)put 48 【 S1】 49 【 S2】 50 【 S3】 51 【 S4】 52 【 S5】 53 【 S6】 54 【 S7】 55 【 S8】 56 【 S9】 57 【 S10】 Section B Directions: There are 2 passages 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.

49、You should decide on the best choice. 57 Americans are reputed to be friendly people. Their friendships, however, tend to be shorter and more casual than friendships among people from other cultures. It is not uncommon for Americans to have only one close friend during their lifetime, and consider other “friends“ to