首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
A、It can cause no damages at all. B、It can cause damages to the computer systems. C、It can copy your files in computers. D、It ca
A、It can cause no damages at all. B、It can cause damages to the computer systems. C、It can copy your files in computers. D、It ca
admin
2015-02-09
26
问题
The computer virus is an outcome of the computer overgrowth in the 1980s. The cause of the term "computer virus" is the likeness between the biological virus and the evil program infected with computers. The origin of this term came from an American science fiction "The Adolescence of P-l" written by Thomas J. Ryan, published in 1977. Human viruses invade a living cell and turn it into a factory for manufacturing viruses. However, computer viruses are small programs. They expand by attaching a copy of themselves to another program. Once attached to the host program, the viruses then look for other programs to "infect". In this way, the virus can spread quickly throughout a hard disk or an entire organization when it infects a LAN or a multiuser system. The timing of the attack can be linked to a number of situations, including a certain time or date, the presence of a particular file, the security level of the user, and the number of times a file is used. Likewise, the mode of attack varies. So called "benign" or the harmless viruses might simply display a message, like the one that infected IBM’s main computer system last Christmas with a season’s greeting. Malignant or the harmful viruses are designed to damage the system. The attack is to wipe out data, to delete files, or to format the hard disk.
Questions 22 to 25 are based on the passage you have just heard.
22. How did the name of "computer virus" come into being?
23. What is the way that the computer viruses infect the computer system?
24. What is a "benign" virus?
25. What can a "malignant" virus do to your computer?
选项
A、It can cause no damages at all.
B、It can cause damages to the computer systems.
C、It can copy your files in computers.
D、It can format your hard drive.
答案
B
解析
转载请注明原文地址:https://jikaoti.com/ti/SM4FFFFM
0
大学英语四级
相关试题推荐
A、Peoplecaneasilygetscholarship.B、Peoplecanknowthenewsoncampus.C、Peoplecanmakeclosefriends.D、Peoplecanshareo
A、Intheleft-luggageoffice.B、Atthehotelreception.C、Inahotelroom.D、Atanairport.C场景推断题。对话中男士说他们最好能在中午12点之前退房,现在只剩半小时
Kodak’sdecisiontofileforbankruptcy(破产)protectionisasad,thoughnotunexpected,turningpointforaleadingAmericancorp
A、Themanshouldpracticehispronunciationoften.B、Togetoneselfunderstoodismoreimportantthanpronunciation.C、Shehasa
Walking,ifyoudoitvigorouslyenough,istheoverallbestexerciseforregularphysicalactivity.Itrequiresnoequipment,e
A、Thehomeworkwasveryeasy.B、Themanshouldgotoclass.C、Themanshouldsitinthebackoftheclassroom.D、She’sfurtherb
A、Sendflowerstosomeoneinhospital.B、Deliverapackagetothehospital.C、Arrangesomeflowers.D、Talktoadoctor.A对话中男士说他
A、Theyhavetosetoffearly.B、TheygoandclimbYellowMountain.C、Theyhavetocatchtheearlytrain.D、Theyshouldnotbelie
A、BringhisIDcardtobuytheticket.B、GotoLosAngelesbytrain.C、Getaticketfromotherairlines.D、Buytheticketatthe
A、Itisraining.B、Thewomanwilltakeherumbrella.C、Thewomanwillnotaccepttheman’sadvice.D、Thewomanwilltakeashowe
随机试题
患儿男性,2岁。反复发热、尿液浑浊6个月,加重1天。化验尿常规:WBC25/HP,RBC1/HP,尿蛋白(++);血常规:Hb110g/L,WBC16.5×109/L,N85%,L15%。下述检查无需急查的是
血浆白蛋白正常参考值是
ADR监测方法中哪种最常用
患者,男,42岁。既往脾大,HBsAg阳性。今晨排柏油样便约200ml。应首先考虑的是
以扩大的分部分项工程为对象编制的是()。
消防工程应严格按照经__________审核批准的设计图纸进行施工()
做好农民工工作的基本原则是()。
SSL(TLS)协议______。
Whichofthefollowingadjectiveisusedasanoun?
Mostgrowingplantscontainmuchmorewaterthanallothermaterialscombined.C.R.Barneshassuggestedthatitisaspropert
最新回复
(
0
)