We ________ our teeth in the morning.[ ]
A. comb
B. brush
C. clean
答案:B
用三根小棒围成一个三角形,其中两根小棒分别为4cm和8cm,如果第三根棒取整厘米数,它最短是多少cm?最长是多少cm?
有如下程序 #include<iostream> using namespace std; class base public: virtual void f1()cout<<"F1Base"; virtual void f2() cout<<"F2Base"; ; class derive:public base void f1() cout<<"F1 Derive"; void f2(int x) cout<<"F2 Derive"; ; int main() base obj1,*p; derive obj2; p=& obj2; p->f1(); p->f2(); return (); ) 执行后的输出结果是( )。
A.F1Derive F2Base
B.F1Derive F2Derive
C.F1Base F2Base
D.F1Base F2Derive