以下叙述中错误的是A.密码学的一条基本原则必须假定破译者知道通用的加密方法,也就是加

题型:单项选择题

问题:

以下叙述中错误的是

A.密码学的一条基本原则必须假定破译者知道通用的加密方法,也就是加密算法是公开的

B.密码学的加密算法比较简单,主要通过加长密钥长度来提高保密程度

C.秘密密钥的一个弱点是解密密钥和加密密钥相同,这就产生了如何安全地分发密钥的问题

D.最著名的公开密钥密码算法就是RSA算法,它具有安全方便,速度快的特点

考点:计算机等级考试网络技术三级网络技术笔试10
题型:单项选择题

解方程

(1)4x-2=3-x

(2)2(x-2)+2=x+1.

题型:单项选择题

1959年在印度召开的“国际法学家会议”通过的《德里宣言》着重强调了关于法治的3项原则,下列哪一选项不包括在内?( )

A.立法保持“人类尊严”

B.防止行 * * 滥用

C.制约国家权力

D.司法独立和律师自由

题型:单项选择题

       April Fool’s Day(愚人节), was a day of laughing and jokes. This day is kept in many countries, not only in Britain and the USA. This is a day to play jokes and make people laugh. Nobody knows when was the beginning of this custom. Some people connect it with the end of winter and the return of spring which make people merry and ready to play jokes.

In Scotland young people were sent for hen’s teeth or bird’s milk and everybody laughed when they could find such things. In the USA and Britain some people could place a sign on a person’s back with the words “push me!” Children often tell a grown-up that his sock is torn or he has something black on his face, and then shout “April Fool!” There is also the old purse(钱包) trick. A purse is left lying in the street, but when someone wants to take it, it is quickly pulled back by a string which the hidden joker holds in his hand. Or the purse may be filled with stones. Sometimes invitations are sent to people, asking them to come and visit somebody, but when they come they see that nobody expects them. Some people like to telephone to the zoo on the day and ask for Mr. Fish, Miss Fox or Mrs. Cat. All these jokes are very old but still they make people laugh.

小题1: ____________knows when the custom of April Fool’s Day started.

A.One

B.Anyone

C.Nobody

D.Someone小题2:Many tricks are played on April Fool’s day except ____ .

A.phoning the zoo

B.placing a sign on someone’s back

C.playing cards

D.leaving a purse in the street小题3:The purpose of playing jokes is to _____ .

A.for fun

B.make people laugh

C.make fool of oneself

D.fool someone小题4:The best title of the passage is ____ .

A.How people in the west spend their April Fool’s Day

B.Customs are different

C.How British people celebrate their holidays

D.How April Fool’s Day comes about

题型:单项选择题

531工程公共基础参数运维发起模式分()、()

A.格式化

B.非格式化

C.统一化

D.参数化

题型:单项选择题

肺的主要生理功能。

更多题库