车钩焊修后应进行（）处理。
A.回火
B.正火
C.调质
参考答案：B
How many ____ are there in your family? [ ]
A. people
B. peoples
C. the people
The real-name policy for train tickets has been applied to all trains since January l, 2012 in China,________ will make it easy for people to get tickets.
A．which
B．when
C．what
D．Where
