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对于纯虚函数描述正确的是 ( )。

多选

对于纯虚函数描述正确的是 ( )。

A 含有纯虚函数的类不能被声明对象，这些类被称为抽象类

B 继承抽象类的派生类可以被声明对象，但要在派生类中完全实现基类中所有的纯虚函数

C 继承抽象类的派生类可以被声明对象，不需要实现基类中全部纯虚函数，只需要实现在派生类中用到的纯虚函数

D 虚函数和纯虚函数是一样的，没什么区别

正确答案

AB

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