把刚加热到临界温度以上，保温一段时间，然后在静止空气中冷却的热处理工艺为（）。
A、退火
B、正火
C、回火
D、淬火
参考答案：B
He _____ his first wife soon after his graduation from university but _____her a month later._
A．married with; separated
B．married to; got separated
C．was married; separated with
D．married; separated from
阴极保护装置是以牺牲自身的方式对管网进行保护的。
