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

问题:

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

考点:经济学电子商务交易安全电子商务交易安全题库
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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

题型:单项选择题

两个正数之和为______,两个负数之和为______,一个数同0相加得______.

题型:单项选择题

用硫代硫酸钠标定碘标准溶液,其反应式为:2Na2S2O3+I2=Na2S4O6+2NaI,已知15.0ml碘溶液,消耗了30.0ml,0.1000mol/L的硫代硫酸钠溶液,碘溶液的摩尔浓度是()

A.0.0500mol/L

B.0.1000mol/L

C.0.2000mol/L

D.0.5000mol/L

E.1.0000mol/L

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不同的生产方式决定了物料管理中库存管理方式的不同、不同的生产工艺决定了不同的管理控制技术的应用。

题型:单项选择题

应收账款的函证结果与被审计单位会计记录不一致的原因主要有哪些

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