起重机的混凝土基础平整度允许偏差()。
A. 1/1000
B. 2/1000
C. 3/1000
D. 4/1000
氧气瓶、乙炔瓶工作间距不小于()m。
A. 3
B. 4
C. 5
D. 6
then fast and effective_____(31)can be made to re-educate the unconscious towards allowing the person to relax_____(32)and to allow a natural state of Sleep to_____(33).
A. fully
B. recently
C. silently
D. actively
One of the strongest hurricanes _____ was the Florida Keys Storm of 1935, during which 500
A. to record
B. recorded
C. recording
D. being recorded