“一炮三检”中的“三检”指()
A、装药前检查瓦斯
B、装药后检查瓦斯
C、放炮前检查瓦斯
D、放炮后检查瓦斯
参考答案:A, C, D
.Because of the heavy sandstorm, we had to put off the visit until tomorrow to the exhibition of painting _____in the nearby city.
A.to hold
B.held
C.holding
D.being held
月骨脱位后,若出现手指感觉障碍,常为()
A.拇指
B.示指
C.中指
D.环指
E.小指