无码高清视频|成人自拍视频|欧美成人午夜无码A片秀色直播|草美女视频网站|美女被操网站在线观看

單項選擇題

The officer in charge of the engineering watch shall notify the chief engineer without delay ().

A.in any emergency or if in any doubt as to what decision or measures to take
B.in the event of any impending action in machinery spaces that may cause reduction in ship’s speed
C.when isolating and bypassing machinery to be worked on
D.co-operating with any engineer in charge of maintenance work

微信掃碼免費搜題