形式服从内容，（）的一致，是版式设计必须遵循的基本原则A、形式服从内容B、主题与内涵

It was at the very beginning ______ Mr Smith made a decision _____we should send for a doctor.

A．when; which

B．that; which

C．when; that

D．that; that

The  policeman asked the child _____ so that he could take him home.   [ ]

A. where did he live

B. where he lived

C. how he lived

钢筋机械按作业方式可分为（）、（）、钢筋焊接机械、钢筋预应力机械。

下列程序的输出结果是______。
main()
int i=3；
switch(i)
case 1:
case2:printf("%d",i)
case3:
case4:break;
default:printf("OK");


A) 0 B) 3 C) OK D) 没有任何输出

预防青少年违法犯罪工作的主要任务？