【单选题】An egg measured 6.5 cm in diameter. A student made a drawing of this egg and the diameter was measured as 19.5 cm. What was the magnification of the drawing?
【单选题】若有以下程序: #include <iostream> using namespace std; #define PI 3.14 class Point { private: int x,y; public: Point(int a,int b) { x=a; y=b; } int getx() { return x; } int gety() { return y; } }; class Cir...