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 is a virus that causes great damage. B、It is a virus that infects the IBM’s computer system. C、It is a virus that carries a
A、It is a virus that causes great damage. B、It is a virus that infects the IBM’s computer system. C、It is a virus that carries a
admin
2013-09-09
48
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 is a virus that causes great damage.
B、It is a virus that infects 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/Hp07777K
0
大学英语四级
相关试题推荐
A、Apoem.B、Anessay.C、Abookreport.D、Ashortstory.DWhatmustthestudentsreadforWednesday?
Malelionsaxeratherreservedaboutexpendingtheirenergyinhunting.Morethanthreequartersofkillsaremadebylionesses.
Theauthorthinksthattheconclusionsofanyresearchaboutpeople’sstateofmindare______.Thefirstandmostimportantth
Weusuallythinkofpollutionasaharmfulwastesubstancethatthreatenstheairandwater.【C1】______somepeoplehavebecome【C2
AnimalsontheMoveItlookedlikeascenefrom"Jaws"butwithoutthedramaticmusic.Ahugesharkwaslowlyswimmingthrou
Theaccessibilityofcleanwaterisoneofthemostimportantcomponentsinthehealthofyoungchildren.Inmanyareas,disease
A、Thewomanwillarriveatthestationintenminutes.B、Thewomanhasfifteenminutestogettothestation.C、Themanthinksh
A、ThemansawMarkonthestreettwomonthsago.B、ThewomanhadforgottenMark’sphonenumber.C、Thewomanmadeaphonecallto
A、Correctingexaminationpapers.B、Teachinganeconomicscourse.C、Researchinginthelibrary.D、Gradinghomeworksets.D本题问“在这个
SomeyearsagoIwasofferedawritingassignmentthatwouldrequirethreemonthsoftravelthroughEurope.[hadbeenabroadaco
随机试题
《中国人民银行法》规定了中国人民银行的职责是()。
Thepurposeofanapplicationletteristohelpyouto"sell"yourself.Youshould【C1】______thejobyouwantclearly,andshould
患者,男,24岁。因打架被刀砍伤右大腿及臀部,检查发现坐骨神经缺损6cm长。最恰当的处理方式为()
一般情况下,需求曲线是一条倾斜的曲线,其倾斜的方向为()。
香港经济发展的四大支柱产业是()。
企业选择薪酬体系的外部影响因素主要包括()。
“我们敢说日常所见的人中,十分之九都是他们的教育所决定的”。这一观点出自洛克的___________。
()的人在解决认知任务时,总是谨慎、全面地检查各种假设,在确认没有问题的情况下才会给出答案。
美国和墨西哥两国分别有劳动力150单位和50单位。工人偏向本国就业,但是偏向的程度不同。两国工人可以完全替代(在同一国家工作,劳动生产率是一样的)。设两国生产完全一样的产品,价格为1。两国的生产技术可用柯布一道格拉斯函数表示,规模报酬不变。Qi=AiKiα
Theyoungsoldier______.Whenhediscoveredwhohadwrittenthelettertohismother,thesoldier______.
最新回复
(
0
)