Hacking People tend to think of computers as isolated machines, working away all by themselves. Some do-personal computer without an outside link, like someones hideaway 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 m local, national and even global network joined by telephone connections. Hacking, our electronic-age term for computer break-in, is more and more in the news-brainy kids vandalizing university records, even pranking about in supposedly safeguarded systems. 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 building: A dissatisfied former insurance-company employee wipes out information from payroll 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, commercial and government computer systems. Such disastrous cases have already occurred. Now exists the possibility 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 panic. Yet neither business nor government has done enough to toughen its defenses against attack. For one thing, such defenses are expensive; for another, they may interrupt communication the main reason for using computers in the first place. A to show that a hacker is more dangerous than a thief. C to demand that a protective computer system should be set up against thieves. 37 The word vandalizing in Line 17 means B creating. D updating, A Hacking is also known as computer break-in. C Hacking is a widespread concern. 39 Which of the following is NOT mentioned in the passage as an instance of attack by a hacker? B Shutting down the computer whenever he wishes. D Spoiling a system for air traffic. A it will cause fear among the public. C tough measures are illegal. 【参考答案】36. A37. C38. B39. C40. D
《基础英语天天学》(2)
浅谈将来进行时(二)
不定词的作用
虚拟语气中wish的用法
基础英语轻松学【13】丘比特之恋(2)
worth 的用法
词语辨析精讲 三十五
透彻讲解倒装
浅谈倒装句(五)
基础英语讲座【21】
简单句、并列句和复合(4)
基础英语轻松学【2】童话英语(2)
浅谈倒装句(二)
基础英语轻松学【9】美丽因为优酸乳
简单句、并列句和复合句(2)
强调句结构
分词用法详解
浅谈倒装句
现在分词与不定式
并列连词和并列结构
浅谈非谓语动词时态
否定转移在英语中的应用
Sailing 英语词汇
常见的前缀(7)
连词的用法
基础英语轻松学【12】丘比特之恋(1)
基础英语轻松学【11】情人节的由来
连词短语
基础英语轻松学【10】迷信的美国人
基础英语轻松学【4】星情物语——水瓶座
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |