题目内容

多态能够让开发人员( )进行编程

A. 以抽象的形式
B. 以全局的形式
C. 以特定的形式
D. A和B

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对于使用多态的应用程序来说,某个对象的确切类型( )

A. 执行时才可以知道
B. 应用程序编译时能够判断
C. 程序员编写程序时就已知道
D. 永远不会知道

下列那个不是面向对象程序设计方法的特点?( )

A. 抽象
B. 继承
C. 多态
D. 结构化

为了区分重载多态中同名的不同方法,要求:( )

A. 参数名不同
B. 返回值类型不同
C. 采用不同的形式参数列表
D. 选项 A B C 都对

Dialogue 1[音频]B: What kind of qualities do you _____ in your friends?A: I like to make friends with people who are _.B: Sure. But sometimes those who are not open and active can make very good friends.A: Of course. So that’s why a person always has __ friends in their life.B: Yes. I like to make friends with those who I can _well with.A: Sure! Who will make friends with those they cannot get on well with.B: Oh, don’t get me wrong. I’m just saying that maybe you don’t have much in common, but you feel very comfortable when you are with_____________________.A: I agree. But generally, I prefer to make friends with those who share similarinterests with me.We can do a lot of things together and it’s fun.B: That certainly is good.