建筑安全技术
卷扬机从卷筒到第二个导向滑轮的距离,按规定:带槽卷筒应大于卷筒宽度的 ( )倍,无槽卷筒应大于20倍。
A.10
B.15
C.20
D.25
参考答案:B
—Nothing can bring him to sell the house.
—Yeah, it is the house he has spent the happiest days of his life. [ ]
A. that
B. which
C. for that
D. in which
WTRZ—2000型钻机利用空气钻井时一般采用()台空压机供气。
A、1
B、2
C、3
D、4