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 once infected the IBM’s computer system. C、It is a virus that car
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 car
admin
2015-06-23
82
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-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 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 harm-less 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 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
细节题。题目中的benign是关键词,所谓“良性”病毒就是不会造成危害的病毒。故选D。
转载请注明原文地址:https://kaotiyun.com/show/aDl7777K
0
大学英语四级
相关试题推荐
A、Theyareinoppositedirections.B、Theyarefifty-fivemilesapart.C、Theyarequiteclosetoeachother.D、Theyarealongdr
A、TheBritish.B、TheAmericans.C、TheRomans.D、TheRussians.C选项的内容表明,本题考查某个国家的人,听音时注意不同国籍的人的相关情况,并听清问题问的是什么。短文中提到,罗马人首先使用记载式广告
Nameshavegainedincreasingimportanceinthecompetitiveworldofhighereducation.Ascollegesstriveformarketshare,they
Haveyoueverwonderedatthewaycertainpeople【B1】______thebestinothers?We’veallknownthem—chiefexecutives,【B2】______
A、It’scloudy.B、Itdrizzles.C、Itshowers.D、Itrainsheavily.D对话中女士说男士像adrownedrat(落汤鸡),然后问男士难道不知道会有athunderstormtoday,男士
A、Hereturnedthebookstothenewlibrary.B、Hewenttoseethenewlibrary.C、Hebegantostudyinthenewlibrary.D、Heborro
A、Horror.B、Romance.C、Thriller.D、Cartoon.C选项的内容表明,本题考查电影的类型。由女士提到的It’sasciencefictionthriller可知,女士要看的电影是科幻惊悚片,故答案为C)。
ANewYorkTimes-CBSNewspollfoundthatalmost90percentofAmericansthinkthathomeownershipisanimportantpartoftheAm
ANewYorkTimes-CBSNewspollfoundthatalmost90percentofAmericansthinkthathomeownershipisanimportantpartoftheAm
A、Thepresenthealthcaresystemhasreceivedtoomuchcriticism.B、TheUSgovernmentcannotdecidewhatreformsshouldbetake
随机试题
简单商品经济的基本矛盾是()
男性,50岁,哮喘史7年。严重发作持续已两天,痰黏稠、尿少。查体:呼吸困难,烦躁不安,发绀,心率128次/分,双肺呼吸音低,少许哮鸣音。下列治疗哪项是错误的
孕妇,29岁。分娩过程中,出现不协调性子宫收缩乏力,正确的处理是
战争开始会使交战国间的法律关系发生重大变化,产生一系列的法律后果,以下哪一项不属于产生的法律后果?
票据丢失后,可以采取的补救措施主要有()。
某演唱会定于晚上7点30分在鸟巢举行,根据安保工作要求,在人口要求观众需经过安检才可入场。观众甲在接受安检时,安检器发生鸣叫,执勤民警李某要求其打开随身携带的包进行检查,甲以包内物品涉及个人隐私为由拒绝接受安检。在李某多次劝说下,甲仍不同意并同李某发生争吵
从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性。
flashquit
设一棵满二叉树共有15个结点,则在该满二叉树中的叶子结点数为()。
The______inJanet’scharacterhashinderedherfromadvancementinhercareer.
最新回复
(
0
)