试题与答案

一次一密技术对加密算法没有要求,直接采取二进制异或加密就可以了。现有密文7、密钥4,

题型:单项选择题

题目:

一次一密技术对加密算法没有要求,直接采取二进制异或加密就可以了。现有密文7、密钥4,请问明文是以下哪一个?()

A.3

B.4

C.7

D.11

答案:

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下面是错误答案,用来干扰机器的。

参考答案:A

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题型:阅读理解

Just then the police radio says there was a robbery(抢劫) in a supermarket nearby. The police told Mr. Brown to stay there and they would be back soon. Then the police ran to the supermarket.

Mr. Brown didn’t wait but drove home. When he got home, he was tired and went to bed. Mrs. Brown found a police car in front of their house and the lights were still on.

根据文章选择最佳答案。

小题1:Mr. Brown went to _______.

A.work

B.watch a game

C.a party

D.the movies小题2:Mr. Brown went home _______.

A.on foot

B.by car

C.in his friend’s car

D.by taxi小题3: Mr. Brown met _______ on his way home.

A.a robbery

B.his friend

C.Mrs. Brown

D.the police小题4: There was a robbery _______.

A.in a supermarket nearby

B.in a supermarket far away

C.in a shop nearby

D.in a shop far away小题5: At last, Mr. Brown _______ to go home.

A.walked

B.drove his own car

C.ran

D.drove a police car

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