工作面过断层、硬煤、硬夹矸层需要爆破时,必须把支架的立柱、千斤顶、管线、通讯设施等掩盖好,防止崩坏。()
参考答案:对
--Would you like me to turn down the radio a bit?
--______.I’m used to working with the radio on .
A.No, I don’t like it
B.Yes ,it doesn’t matter
C.No, it’s all right
D.Yes, please
医药商品销售方式有:()
A.日常批发
B.函电销售
C.展览销售
D.会议销售
E.上门销售