硐室爆破平硐和小井掘进时，如采用电灯照明其电压不得超过（）。
A.36V
B.110V
C.220V
参考答案：A
When people want to relax themselves, they prefer TV or listen to music rather than
newspapers. [ ]
A. watching, read
B. watching, to read
C. to watch, read
D. to watch, reading
肩关节前脱位占肩关节脱位的（）
A.10%
B.40%
C.50%
D.80%
E.95%
