氢型高速混床运行失效控制指标为电导率()μS/cm。
A.大于0.2;
B.大于1.0;
C.大于0.3;
D.大于0.5。
参考答案:A
癫证的病位在于()
A.心、脾、肝、胆
B.心、脾、肝、肾
C.肝、胆、脾、肾
D.心、脾、肾
E.心、肝、胆
[说明] 下面程序计算正方体、球体和圆柱体的表面积和体积。 [C++程序] #include<iostream.h> class container protected: double radius; public: container(double radius) container::radius=radius; (1) ; (2) ; ; class cube: (3) public: cube(double radius)::container(radius)(); double surface_area() return radius*radius*6; double volume() return radius*radius*radius; ; class sphere: public container (4) ; double surface_area() return 4*3.1416 *radius*radius; double volume() return 3.1416*radius *radius*radius*4/3; ; class cylinder:public container double height; public: cylinder(double radius, double height):container(radius) (5) ; double surface_area() return 2*3.1416*radius*(height+radius); double volume() return 3.1416 *radius*radius*height; ; void main() container *p; cube obj1(5); sphere obj2 (5); cylinder obj3(5,5); p=&obj1; cout<<"正方体表面积:"<<p->surface_area()<<endl; cout<<"正方体体积:"<<p->volume()<<endl; p=&obj2; cout<<"球体表面积:"<<p->surface_area()<<endl; cout<<"球体体积:"<<p->volume()<<endl; p=&obj3; cout<<"圆柱体表面积:"<<p->surface_area()<<endl; cout<<"圆柱体体积:"<<p->volume()<<endl;