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
How did the name of "computer virus" come into being?
How did the name of "computer virus" come into being?
admin
2017-05-31
19
问题
How did the name of "computer virus" come into being?
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-1 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 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. 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. There are several kinds of anti-virus software providing the services for prevent the virus from attacking your computer. So you should install the anti-virus software before your access to the Internet. It will be no use to install the software after you’ve got infected.
选项
A、It is a virus that causes great damage.
B、It is a virus that once infected the IBM’ s computer system.
C、It is a virus that carries a Christmas greeting.
D、It is a virus that causes no harm to the computer systems.
答案
D
解析
转载请注明原文地址:https://kaotiyun.com/show/S3Vd777K
本试题收录于:
公共英语三级笔试题库公共英语(PETS)分类
0
公共英语三级笔试
公共英语(PETS)
相关试题推荐
Didyoueverhavesomeone’snameonthetipofyourtongueandyetyouwereunabletorecallit?【C1】______thishappensagain,do
Didyoueverhavesomeone’snameonthetipofyourtongueandyetyouwereunabletorecallit?【C1】______thishappensagain,do
Whichcarwasbadlydamaged?
Hewasafunnylookingmanwithacheerfulface,good-naturedandagreattalker.Hewasdescribedbyhisstudent,thegreatphi
Hewasafunnylookingmanwithacheerfulface,good-naturedandagreattalker.Hewasdescribedbyhisstudent,thegreatphi
SupposeyouaretheChairmanoftheStudentAssociationinchargeofthetreatmentofagroupofvisitingstudentfromCanada.W
Corporationsasagroupofferavarietyofjobs.Mostlargecompaniessendpeopletocollegestointerviewgraduatingstudentsw
Manyteachersbelievethattheresponsibilitiesforlearningliewiththestudent.【C1】______alongreadingassignmentisgiven,
Thebiggestsafetythreatfacingairlinestodaymaynotbeaterroristwithagun,butthemanwiththeportablecomputerinbus
Whatwillthemandotonight?
随机试题
谷阳献酒楚共王与晋厉公战于鄢陵,楚师败而共王伤其目。酣战之时,司马子反渴而求饮,竖谷阳操觞酒而进之。子反曰:“嘻,退!酒也。”谷阳曰:“非酒也。”子反受而饮之。子反之为人也,嗜酒而甘之,弗能绝于口,醉而卧。战既罢,共王欲复战,令人召司马子反,司马
在房地产投资分析中,把某一项投资活动作为一个独立的系统,把各个时间点上实际发生的这种资金流出或流入叫做()。
某市一餐饮企业于2007年8月成立,职工共30人,企业的资产总额为300万元,企业2008年销售收入500万元,出租收入20万元,销售成本和税金370万元,财务费用、管理费用、销售费用共计130万元,企业自行计算的应纳税所得额为20万元,在汇算清缴时经税务
下列各项中,免征城镇土地使用税的是()。
甲公司销售应税产品交纳的消费税,通过提高该产品价格将税负全部转移给购买该产品的乙公司。这种税负转嫁方式属于()。
托马斯·库克在()年发明了一种流通券(旅行支票)。
对心智技能最早进行系统研究的科学家是安德森。()
抽象行政行为:指由行政主体针对不特定的行政相对人,单方作出的具有普遍约束力的行政行为。根据以上定义,下列属于抽象行政行为的是()。
设z=f(2x-y,ysinx),其中f(u,v)具有连续的二阶偏导数,求
Lookatthenotesbelow.Youwillhearawomanphoningforajobapplicationform.JobApplicationR
最新回复
(
0
)