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

<ins id="twlr0"></ins>

單項(xiàng)選擇題

According to the regulation of the voyage trial on new ship,（）is one of the trial items of the UMS ship bridge control.

A.starting and direction changing trial
B.cancelling accelerating function trial
C.lowest stable speed trial
D.continuous running trial

你可能感興趣的試題

單項(xiàng)選擇題

During the dock repair, each sea valve must be disassembled, cleaned and ground well.Before it reassemble the sealing surface between the valve and the valve seat should be checked by （）

A.chief engineer
B.surveyor
C.the engineer
D.the technique personnel of the shipyard

單項(xiàng)選擇題

During the dock repair, when installing the tail shaft and propeller, who should be on the spot to supervise?（）

A.chief engineer
B.the engineer
C.captain
D.any member of the engine department

<pre id="72ziu"><strong id="72ziu"></strong></pre>