Why should anti-virus software be updated at least once a week? Which of the following is suggested by computer experts?

admin2009-04-15 71

问题 Why should anti-virus software be updated at least once a week?
Which of the following is suggested by computer experts?

选项 A、Don’t rush to open any e-mail attachment.
B、Never open any e-mail attachment.
C、It’s always safe to open an e-mail attachment from a friend.
D、Whenever you receive an e-mail, you should make a call to make sure whom it comes from.

答案A

解析从第四自然段最后一句 If an e-mail with attachment (附件) comes from an unknown sender，or unexpectedly from a known sender，it should not be opened．可知，不可以盲目地打开邮件的附件。所以正确的答案为A。

转载请注明原文地址:https://kaotiyun.com/show/Bg8d777K

本试题收录于：公共英语二级笔试题库公共英语（PETS）分类

公共英语二级笔试

公共英语（PETS）

相关试题推荐

随机试题

最新回复(0)

Why should anti-virus software be updated at least once a week? Which of the following is suggested by computer experts?

公共英语二级笔试

公共英语（PETS）

Womenwithlowliteracysufferdisproportionatelymorethanmen,encounteringmore【C6】________infindingawell-payingjobandb

Personswhoareoverweightshouldwatchtheirdietcarefullyinordertolosepounds.Thebestwaytodothisistostartaweig

At21,RicardoSemlerbecamebossofhisfather’sbusinessinBrazil,Semco,whichsoldpartsforships.SemlerJuniorworkedli

Whydidthewomandecidetocancelhervacation?

Maybeyouhavebeentomanycountries,butnowhereelse______suchabeautifulpalace.

--Sorry,Imadeamistakeagain.--______Practicemoreandyou’llsucceed.

WhathappenedtoWinstonChurchillin1954?

Theboywantedtoridehisbicycleinthestreet，buthismothertoldhim______.

Television,orTV,themodernwonderofelectronics(电子学),bringstheworldintoyourownhomeinsightandsound.ThenameTELE

Whatisthemanplanningtodo?

既能行气止痛，又能杀虫疗癣的药物是

激惹性腹泻常见的病因是

下列关于小儿呼吸生理特点的描述，正确的是()。

关于刑法解释，下列哪一项是正确的?()

当事人采用合同书形式订立合同的，自双方当事人签字或者盖章时合同成立。()

微分方程（y+x3）dx一2xdy=0满足y|x=1=的特解为________。

设随机变量X的概率密度为，fx(x)=1/[π(1+x2)](-∞＜x＜+∞)，Y=X2的概率密度为________.

设A为三阶实对称矩阵，且满足条件A2+2A=O．已知r(A)=2．(1)求A的全部特征值；(2)当k为何值时，矩阵A+kE为正定矩阵，其中E为三阶单位矩阵．

Thepolicegotsome______informationabouttheirplans.