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
2013-09-09
93
问题
The computer virus is an outcome of the computer fast growth in the 1980s.(22)The cause of the term "computer virus" is the likeness between the biological virus and the evil program infected with computer.
The origin of this term came from an American science fiction written by Thomas Ryan, published in 1977. Human viruses invade a living cell and turn it into a factory for producing viruses. However, computer virus are small programs.(23)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 multi-user 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.(24)So-called benign viruses might simply display a message, like the one that infected IBM’s main computer system last Christmas with a season’s greeting.(25)Bad viruses are designed to damage the system. The attack is to wipe out data, to delete flies, or to format the hard disk.
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://kaotiyun.com/show/Tp07777K
0
大学英语四级
相关试题推荐
Thereareagreatmanycareersinwhichtheincreasingemphasisisonspecialization.Youfindthesecareersinengineering,in
Mr.Smithwasa【B1】______industrialist,buthewasnotsatisfiedwithlife.Hedidn’tsleepwellandhisfooddidnot【B2】______w
A、Hehadn’tenoughmoney.B、HehadtoflybacktoSingapore.C、Hehadtoholdanimportantparty.D、Hehadtoparticipateinam
A、Theycouldbeasignofglobalwarming.B、TheyaredisturbingAntarcticbirdhabitats.C、Theyhavedestroyedresearchfaciliti
TheAmericanRevolutionwasnotarevolutioninthesenseofaradicalortotalchange.Itwasnotasuddenand【S1】______overt
Duringthe1980s,unemploymentandunderemploymentinsomecountrieswasashighas90percent.Somecountriesdidnot【C1】______
Weusuallythinkofpollutionasaharmfulwastesubstancethatthreatenstheairandwater.【C1】______somepeoplehavebecome【C2
Universitiesarenolonger【B1】______emptyinsummer.Asthestudentsmoveout,holiday-makersmovein,eventothemostunlikel
AstheworldexcitedlygreetedSnuppy,thefirstcloned(克隆)dog,commentatorscelebratedourcleverness.Manyfeelproudthatour
A、Theyshouldleaveearlytoavoidthecongestion.B、Theyshouldstayathomeanddonothing.C、Theyshouldlistentothetraffi
随机试题
社区服务方案策划是在综合考虑各方面的实际情况,征求各类社区居民的意见后,决定采取的服务内容和形式,以便系统地达成特定目标。在服务策划前,社会工作者需要做的工作是()。
药物的治疗指数是
A.红细胞B.白细胞C.血小板D.小圆上皮细胞E.扁平上皮细胞慢性肾炎尿中最具有诊断价值的细胞是
A.医疗机构制剂B.基本准则C.全过程D.医疗机构制剂许可证E.质量监督《医疗机构制剂配制质量管理规范》(试行)是医疗机构制剂配制和质量管理的()
2005年末,流通中的货币(现金)余额比上年末增长11.9%;这表明当年( )。
既注重资本增值又注重当期收入的基金是()。
根据《中华人民共和国合同法》的规定,下列各项中,属于不得撤销要约的情形有()。
产品出口销售额占其产品销售总额达到一定比例的限制类外商投资项目,经批准可以视为允许类外商投资项目,该比例是()。
经当地工伤保险经办机构同意,因工负伤的职工某到另一统筹地区就医,由此产生的交通费、食宿费由()承担。
Psychologistshavemanytheoriestoexplainhowwerememberinformation.The【C1】______isthatmemoryworksasakindofstorage
最新回复
(
0
)