选择题：43. 将钢加热到临界温度以上或其它一定温度，保温一定时问，然后缓慢地冷却到室温，这一热处理工艺称为

题目内容：

43. 将钢加热到临界温度以上或其它一定温度，保温一定时问，然后缓慢地冷却到室温，这一热处理工艺称为（）。(本题2.0分)
A、淬火
B、正火
C、回火
D、退火

参考答案：

The team.s demo doesn.t work on the sort of charge

The team.s demo doesn.t work on the sort of charge that would be required to top

海洋政策是有关海洋权益维护、海洋资源和环境保护的公共政策。海洋政策的相关目标决定了海洋政策更具统筹性。选择一项：对错

The Great Wall was so wide that armies could march ____ it.( )(本题2.0分) A、 at top

Jackie didn.t feel well yesterday; otherwise he ________ to greet his friend at