On October 12, 1987, some Chinese scientists were working at the computers to look for inf

On October 12, 1987, some Chinese scientists were working at the computers to look for information they needed. Suddenly they saw a lot of very bright spots(点 )crossing the computers’ screens. At the same time the computers were working much slower. To find out what was happening they stopped their work to check some parts of the computers. To their horror(恐惧), they found out that most of their stored information was got rid of( 除掉) by computer viruses! Obviously all these computers had been infected（感染 ） by computer viruses.
It is said that the computer viruses were made by a group of young man fond of playing tricks. They all had excellent education. They created the viruses just to show their intelligence.（才智）These kinds of computer viruses are named Jerusalem( 耶路撒冷 )Viruses. These viruses can stay in computers for a long time. When the time comes they will attack the computers by lowering the function(功能), damaging their normal programs or even getting rid of all the information.
We now come to know that Jerusalem Viruses often attack computers on Fridays and that they are spreading(传播) to a list of computers. Among the countries that suffering computer viruses are Britain, Australia, Switzerland and the U.S. But till now, how to get rid of the terrible remains a problem.
【小题1】The group of young men created the viruses to . A．damage the computersB．test their abilityC．play a trick on operators of the computersD．tell the world that they were intelligent【小题2】According to the passage, computer viruses seem to .A．have been in nature for yearsB．be difficult to get rid of at presentC．exist（存在） in any computersD．be able to be got rid of in the near future【小题3】The most serious damage caused by the viruses is that .A．all the information stored in the computers is goneB．the computer’s functions are loweredC．the normal programs are damagedD．the computers infected by the viruses can no longer be used【小题4】According to the passage, which of the following is true?A．Four countries found their computers were infected by viruses.B．The viruses will come to a new computer after staying in the old one for some timeC．The Jerusalem Viruses are a great harm to human health.D．Scientists are trying to find a way to get rid of the virusesD

(答案→)D 解析：文章大意：本文讲述了中国和其它一些国家许多电脑被一种叫“耶路撒冷”病毒的感染。【小题1】D 细节理解题。根据文章第二段They created the viruses just to show their intelligence.可知他们创造病毒是为了显示他们的才能。故D正确。【小题2】B 细节理解题。根据文章最后一句But till now, how to get rid of the terrible remains a problem.可知这种病毒当前还很难去除。故B正确。【小题3】A 细节理解题。根据文章第二段When the time comes they will attack the computers by lowering the function(功能), damaging their normal programs or even getting rid of all the information.可知最严重的是电脑里所有的数据被删除。故A正确。【小题4】D 判断推理题。A选项中应当是5个国家；B项与第二段中的事实不符；C项根据常识就可以判断是错误的；D项一种新的病毒诞生，科学家肯定试图研制相应的杀毒软件去除。故D正确。

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