原发性痛经多见于()
A.生育期妇女
B.青少年期
C.40岁以上
D.围绝经期
E.与年龄无关
参考答案:B
个人会籍
下面程序的运行结果是 #include<iostream.h> class base protected: int a; public:base( )cout<<"0"; ; class basel:virtual base public: base1( )cout<<"1"; ; class base2:virtual base public:base2( )cout<<"2"; ; class derived:public base1,public base2 public:derived( )cout<<"3"; void main( ) derived obj;cout < < end1;
A.0123
B.3120
C.0312
D.3012