写结果。class Base{ public: virtual void Set(int b){x=b；}virtual int Get() { return x；} private: int x;};class Derived: public Base{ public: void Set(int d){y = d;} int Get() {return y;} private: int y;};int main( ){ Base B_obj; Derived D_obj; Base *p=&B_obj; p->Set(10);cout<Get(); p=&D_obj;p->Set(20);cout<< p->Get();p->Base::Set(30);cout<< p->Base::Get();p->Set(p->Get()+20)；cout<< p->Get();return 0；}

A. rule deny source 172.16.10.1 0.0.0.0
B. rule deny source 172.16.10.1 0.0.0.0 destination 172.16.20.0 0.0.0.255
C. rule deny tcp source 172.16. 10. 1 0.0.0.0 destination 172.16.20.0 0.0.0.255
D. rule deny ip source 172. 16.10. 1 0.0.0.0 destination 172.16.20.0 0.0.0.255

A. 静态NAT本质是1对1映射
B. NAPT通过一个IP地址和不同端口号绑定，实现多对1映射
C. NAT的功能是将私网IP地址转换为公网IP地址，并不能达到节约IP地址的目的
D. 动态NAT一般结合ACL进行联动配置

A. 2
B. 5
C. 10
D. 15

A. 丙氨酸
B. 谷氨酸
C. 谷氨酰胺
D. 天冬酰胺