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【单选题】
在网络安全中,中断是指攻击者破坏网络系统的资源,使之变成无效的或无用的,这是对( )。A.
可用性的攻击
B.
保密性的攻击
C.
完整性的攻击
D.
可控性的攻击
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反馈参考答案：
举一反三
【单选题】The Chinese people will never yield ______ any military threat from any country.
A.
up
B.
to
C.
in
D.
at
【简答题】进排气系统的作用是什么？
【简答题】June 1 st is Day. All the children enjoy it very much. A Children B Childrens’ C Children’s D Child
【单选题】English is used by more people than is__________language except Chinese.
A.
any
B.
any Other
C.
other
D.
all other
【简答题】In our world, any story of this kind makes people ______.
【单选题】People cannot close their eyes to the facts______.
A.
no longer
B.
not any longer
C.
any longer
D.
not longer
【单选题】She is ready to help people ______. [ ]
A.
any time
B.
any times
C.
some time
D.
sometime
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