单项选择题

对于类定义
class A
{public:virtual void func1(){}
void func2(){}
};
class B:public A
{public:void func1(){cout＜＜"class B func1"＜＜endl; }
virtual void func2(){cout＜＜"class B func2"＜＜endl; }
};
下面正确的叙述是______