单项选择题下列关于虚基类的描述中,错误的是______。
单项选择题下列程序中,划线处正确的语句是____。#include<iostream.h>Class Base{Public:Void fun(){cout<< Base::fun <<endl;}};Class Derived:public Base{void fun(){______ 显示调用基类的函数fun()Cout<< Derived::fun <<endl;}};