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【单选题】
商用加密系统的相对安全性可由什么测量?A.
由使用该系统的政府机构进行评分。
B.
系统所需的最低加密迭代数。
C.
密钥空间的大小和可用的计算能力。
D.
密码系统中采用的密钥变更方法。
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举一反三
【单选题】Such ______ the case, it’s difficult to say who is right.
A.
was
B.
were
C.
would be
D.
being
【单选题】He’d like __ by air to Egypt, ___ he?
A.
to go, hadn't
B.
going, wouldn't
C.
to go. Wouldn't
D.
going, shouldn't
【简答题】Why do we say bridges are transparent to hosts while routers are not?
【单选题】Which movie does Mike say that he has watched?
A.
Harry Potter.
B.
Transformers.
C.
The Big Bang Theory.
【单选题】What does the woman say about the study circles in Sweden?
A.
It creates an environment for socializing.
B.
It offers various courses with credit points.
C.
It trains young people's leadership abilities.
D.
It provides opportunities for language practice.
【单选题】What does the woman say about Jack Green?
A.
He is skilled and experienced.
B.
He is very close to the manager.
C.
He is always trying to stir up trouble.
D.
He is always complaining about low wages.
【单选题】What does the woman say is common in writing papers?
A.
New ideas come up as you write.
B.
Much time is spent on collecting data.
C.
A lot of effort is made in vain.
D.
The writer's point of view often changes.
【单选题】How many women's business associations were there in Egypt in 1995?
A.
none
B.
one
C.
twenty-two
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