Don't be too hard ______ the boy; he did_爱下问搜题

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问题选择题

Don't be too hard ______ the boy; he didn't mean it. [ ]

A. at; doing

B. on; to do

C. for; doing

D. for; to do

答案

答案：B

单项选择题

执行下列程序中的输出语句后，a的值是( )。

main()

int a;

printf("%d\n",(a=2*3,a*5,a+7) );

A) 17
B) 37
C) 6
D) 13

多项选择题

电阻焊主要有（）

A、点焊

B、缝焊

C、凸焊

D、对焊