(三)Hacking根据以下材料，回答下列的问题。Peopletendtothinkofcomputersasisolatedmachines，wor

共享题干题 (三) Hacking根据以下材料，回答下列的问题。 People tend to think of computers as isolated machines，working away all by themselves.Some do--personal computer without an outside link，like someone’S hideaway(隐蔽的)cabin in the woods.But just as most of homes are tied to a community by streets，bus routes and electric lines，computers that exchange intelligence are part of a community--local，national and even global network joined by telephone connections. The computer network is a creation of the electric age.but it is based on old—fashioned trust.It cannot work without trust.A rogue loose(为所欲为的无赖)in a computer system called hac-ker(黑客)is worse than a thief entering your house.He could go through anyone’s electronic mail or add to.change，distort or delete anything in the information stored in the computer’s menlory.He could even take control of the entire system by placing his own instructions in the software tl_lat runs it. He could shut the computer down whenever he wished，and no one could stop him.Then he could program the computer to erase any sign of his ever having been there. Hacking.our electronic—age term for computer break—in，is more and more in the news-brainv kids vandalizing university records，even pranking(胡闹)about in supposedly safeguarded svstems.To those who understand how computer networks are increasingly regulating life in the late 20th century.these are not laughing matters.A potential for disaster is buildin9：A dissatisfied fonner insurance—company employee wipes out information from payroll(工资表)files.A student sends out a“virus"，a secret and destructive command，over a national network.The virus copies itself at lightning speed，jamming the entire network--thousands of academic，eommercial and government computer systems.Such disastrous cases have already occurred.Now exists tlle Dossibility of terrorism by computer. Spoiling a system responsible for air—traffic control at a busy airport.or knocking out the telephones of a major city，is a relatively easy way to spread Danic.Yet neitller business nor government has done enough to toughen its defenses against attack.For one thin9.such defenses are expensive;for another，they may interrupt communieation-tlle main reason for using computers in the first place.1.[不定向选择题]According to the passage，which of the following statements is NOT true?A.Hacking is also known as computer break—in. B.Experts on computer networks consider hacking nothing serious. C.Hacking is a widespread concer. D.Hacking is potentially disastrous. 2.[不定向选择题]One of the reasons why business or government has not taken tough measures to stop hacking is that____________A.it will cause fear among the public B.hacking has not caused much damage C.tough measures are illegal D.communication may be interrupted

1.参考答案：B
参考解析：B 本题问下面的叙述哪个是错误的。第三段第一句将hackin9解释为“computer break-in”，故选项A正确，选项C和D的意思下文中也提到了，根据排除法可得出选项B是错误的，其实，根据常识我们也能判断出选项B是错误的。黑客的危害性已人所共知。
2.参考答案：D
参考解析：D此题问为何很多公司或政府机构没有采取严厉的措施制止黑客行为。短文最后一段提到“such defenses ale expensive;for another，they may interrupt communication”，故选D。3.[不定向选择题]The writer mentions“a thief”in the second paragraph____________.A.to show that a hacker is more dangerous than a thief B.to tell people that thieves like to steal computers nowadays C.to demand that a protective computer system should be set up against thieves D.to demonstrate that hackers and thieves are the same people

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