正不敌邪或正气持续衰弱以致气不能内守,可导致的是()
A.气陷
B.气脱
C.气郁
D.气结
E.气闭
参考答案:B
分馏塔的启动期间大致可分为哪三个阶段?每个阶段的主要任务是什么?
Especially in adverse weather,risk of collision with an offshore supply vessel increase when the vessel is moored to what side of the unit?().
A.Upwind
B.Downwind
C.Crosswind
D.Downcurrent