英语四级快速阅读专项练习（四）
【答案与解析】
4. Computer Crime
1. N该句句意为:美国联邦调查局确切知道计算机犯罪造成了多大损失。本题解题依据为本文第二段 “Even the FBI,which attempts……is involved”，该句大意为:尽管FBI致力于对各种犯罪的上升和下降有清晰认识，但并不能精确说明损失多大，所以与原文之意不合。
2. Y 该句句意为:计算机拥有者很容易利用大量计算机数据库，本题解题依据为第二段最后一段话“……the easy access of microcomputers to huge mainframe data bases.”与原文之义吻合。
3. Y该句句意为: 本文第三段暗示大多数利用计算机犯罪者是相关公司雇员。本题解题依据为文章第三段最后一句话，其大意为: 现实情况表明很可能是该公司雇员内部人员……,与原文所述之义吻合。
4. N该句句意为: 许多公司不举报计算机犯罪是因为法律诉讼通常花费很多钱。解题依据为本文第九段第一和第二句话，他们不举报是害怕公众发现其计算机系统的弱点而对其丧失信心。据此可确定与原文所述不符。
5. N该句句意为: 当计算机犯罪发生在人多的房间里时，通常有很多证人指证犯罪。本题解题依据为本文第六段第一句话，该句大意为:即使计算机犯罪发生在满是人的房间里，通常也无证人。据此可知该句所述之义与原文不符。
6. Y该句句意为:本篇文章主要是关于计算机犯罪的增长及与之作斗争的困难性，通览全文，尤其根据小标题的提示,我们不难看出文章主要论述了计算机犯罪与日俱增及难于发觉和阻止等诸方面的原因，即文章的中心思想，与原文所述主旨吻合。
7. NG该句句意为:计算机犯罪上升是因为有更多便宜的计算机。本文第二段用a，b，c列出了计算机犯罪增加的三大原因，其中并未提及计算机便宜这一点。
8.twelve答案依据为第二段第一句话。
9. an example “……be cited as an example”,表示“引用……来作为一个例证”答案依据为文章最后一段第二句话。但原文没有直接照抄的语言，只能根据理解完成此空。
10.customer trust答案依据为本文第九段最后一句话。
www.xuehuiba.com Directions: In this part, you will have 15 minutes to go over the passage quickly
For questions 1-7, mark
Y （for YES）if the statement agrees with the information given in the passage;
N （for NO）if he statement contradicts the information given in the passage;
NG （for NOT GIVEN）if the information is not given in the passage;
For questions 8-10, complete the sentences with the information given in the passage.
Computer Crime
A computer crime is generally defined as one that involves the use of computers and software for illegal purposes. This doesn't 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, 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 from$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 reasons 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 bases.
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 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. 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 in the investigation of more conventional crimes.