决定一个做平抛运动物体的水平位移大小的因素是[ ]
A.抛出时的初速度
B.抛出时的竖直高度
C.抛出物体的质量
D.抛出时的初速度和竖直高度
D
A: I haven't been driving as fast as the other cars. B: ______
A.Sorry, madam. I am sorry there is something wrong with your car.
B.Don't be arguing with me. I'll kill you if you drive so far next time on the superhighway.
C.The other cars Different cars have to observe different traffic rules, you know.
D.I'm sorry, madam, your speed limit's fifty-five miles per hour. I have to give you a ticket.
下面程序的执行结果为 #include" iostream" using namespace std; class A int a; public: void Seta(int x) a=x; void Display_a( ) cout < < a < < end1; ; class B int b; public: void Setb(int x) b=x; void Dispaly_b( ) cout < < b < < end1; ; class C:public A,private B private: int c; public: void Setc(int x,int y,int z) c=z;Seta(x);Setb(y); void Display_c( ) cout < < c < < end1; ; ① voidmain( ) ② ③ C cc; ④ cc.Seta(1); ⑤ cc.Display_a( ); ⑥ cc.Setc(2,2,3); ⑦ cc.Dispaly_b( ); ⑧ cc.Display_c( );
A.输出为2 2 3
B.有错误在第5行
C.输出为1 2 3
D.有错误在第7行