【单选题】【消耗次数：1】
虚拟专用网是架构在（ ），是专用网络的扩展。
①
公用网络上的公用网络
②
公用网络上的专用网络
③
专用网络上的公用网络
④
专用网络上的专用网络
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相关题目
【单选题】
下面关于虚拟专用网的叙述中正确的是（100分）
①
虚拟专用网是企业自己建设的专用网络
②
虚拟专用网是利用专门的安全技术使用公用网络传输信息的技术
③
虚拟专用网是专门传输虚拟数据的网络
④
虚拟专用网是企业内部的虚拟网络
【单选题】
B2B是指企业与企业之间通过专用网络或Internet，进行数据信息的交换、传递，开展交易活动的商业模式。下面哪个网站属于B2B模式？
①
淘宝
②
阿里巴巴
③
美团
④
京东
随机题目
【单选题】
10. After a three-hour heated discussion, all the members in the jury reached the conclusions that the man was_________ of murder.
①
criminal
②
charged
③
guilty
④
faulty
【单选题】
09. The chemical factory was demolished _________ protecting the environment.
①
inspiteof
②
inhonorof
③
infavorof
④
inthenameof
【单选题】
06. He spoke so quickly that I didn t _________ what he said.
①
makefor
②
makesure
③
makeover
④
makeout
【单选题】
01. You should be able to_________ right from wrong.
①
perceive
②
distingusih
③
sight
④
observe
【单选题】
04. Your sister has made an_________for you to see the dentist at 3 this afternoon.
①
appointment
②
intervies
③
opportunity
④
assignment
【单选题】
08. It is not that I do not like plays. The reason why I did not go to the theater last night was that I could not ____ the time.
①
offer
②
leave
③
affor
④
manage
【单选题】
02. Any student who _________ his homework is unlikely to pass the examination.
①
reduces
②
offends
③
practices
④
neglects
【单选题】
07. I wrote it down_________I should forget it.
①
incase
②
incaseof
③
inorderthat
④
forfearof
【单选题】
05. The committee is expected to_________ a decision this evening.
①
reach
②
arrive
③
bring
④
take
【单选题】
19. — You cant finish the book in less than an hour,I suppose? —
①
Yes，ImsureIcan
②
No，hardly
③
Sorry，Icant
④
IdontthinkIcan