田径运动会的4×100m接力比赛中,每个接力区的有效距离是()。
A.10米
B.15米
C.20米
D.25米
参考答案:C
解析:接力区的距离为20米。
分析下列程序: #include<stdio.h> main() { int *p1,*p2,*p;int a=6,b=9;p1=&a;p2=&b;if(a<b){p=p1;p1=p2;p2=p;}printf("%d,%d",*p1,*p2);printf("%d,%d",a,b); } 程序的输出结果为( )。
A.9,66,9
B.6,9 9,6
C.6,9 6,9
D.9,69,6
I recommended strongly that you ______a more powerful computer, even though your brother recommended ______ an ordinary one.
A.bought; to buy
B.buy; buying
C.would buy; to buy
D.bought; buying