下列关于爆破的说法错误的是()。
A、浅孔爆破应采用干式凿岩
B、深孔爆破凿岩机应配收尘设备
C、在残孔附近钻孔时应避免凿穿残留炮孔,在任何情况下不应钻残孔
参考答案:A
Questions 1-4
What did the man and the woman do last week?()
A.They bought some worthless souvenir.
B.They did some manual work.
C.They went on a company trip.
D.They wrote a guidebook.
防止党员和党的干部腐化变质、维护党的纯洁性的重要途径是什么?