题目内容

在采用公开密钥密码体制的数字签名方案中，每个用户有一个私钥，可用它进行 (39) ；同时每个用户还有一个公钥，可用于 (40) 。

A. 解密和验证
B. 解密和签名
C. 加密和签名
D. 加密和验证

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已知f1(int)是类A的公有成员函数，并将指针p定义为可以指向函数f1的指针类型，则可以实现让p是指向成员函数f1()的指针的语句为【7】。

表达式cout＜＜’/n’还可表示为【6】。

Generally, Chinese schools begin in September after a long Summer holiday. There are two terms in a school year; the first term is from September to January and the second is from February to July. Most children begin to go to school when they are six. Most students are seventeen or eighteen when they finish high school. Most South Korean children begin to go to school when they are eight.[A] True.[B] False.

After high school, many students go to college. They usually have to pay a lot of money. So many college students do some part-time jobs after class.

Generally, Chinese schools begin in September after a long Summer holiday. There are two terms in a school year; the first term is from September to January and the second is from February to July. Most children begin to go to school when they are six. Most students are seventeen or eighteen when they finish high school. Going to college needs a lot of money.[A] True.[B] False.

After high school, many students go to college. They usually have to pay a lot of money. So many college students do some part-time jobs after class.