97免费在线观看视频,亚洲综合自拍网,黄色毛片免费观看,热久久综合网,免费看日产一区二区三区狠狠操av,久久久涩涩涩,在线精品免费视频,人人插天天干,久久91精品国产91久久

<ruby id="fjcna"><small id="fjcna"><b id="fjcna"></b></small></ruby>

單項(xiàng)選擇題

When the dock is refilled with water after docking repair, the first work which should be done by engineers is （）

A.igniting boiler
B.releasing air in sea water system
C.starting generator
D.cut off shore power

你可能感興趣的試題

單項(xiàng)選擇題

During the deck repair,（） should be measured firstly before tail shaft is drawn out.

A.the sinking of tail shaft
B.the clearance of stern bearing
C.the total flexure of both end bearing
D.main engine crankshaft deflection

單項(xiàng)選擇題

To ensure the quality of dock repair, C/E should know very well （）

A.the repair standard of main docking repair item
B.the special tool for repair item
C.the skill of repairer
D.the status of docking repair equipment

<ruby id="psl9y"><output id="psl9y"></output></ruby>