冲击地压矿井每年至少进行一次(),提高矿井应急救援能力,防范灾害发生和事故扩大。
参考答案:防冲演习
If the weather had been better, we could have had a picnic. But it ______ all day. [ ]
A. rained
B. rains
C. has rained
D. is raining
下列不属于公务员法定培训类型的是( )
A.初任培训 B.转任培训C.任职培训 D.专门业务培训