除油罐投运时,应打开罐底及收油槽内的()阀门。
A.取样
B.放气
C.采暖伴热
D.排污
参考答案:C
_______ to be much chance of our catching him up in the near future.
A.You don’t seem
B.It doesn’t seem
C.That doesn’t seem
D.There doesn’t seem
每次探水孔的位置由探水的()而定
A、探水的深度
B、钻杆长度
C、探水超前距
D、巷道允许掘进的距离