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

<ruby id="xjx8m"><small id="xjx8m"></small></ruby>

<pre id="xjx8m"></pre>

單項選擇題

Before entering a tank, always check the vapor content（）a combustible gas indicator.

A.with
B.by
C.of
D.for

你可能感興趣的試題

單項選擇題

Direct delivery and discharge can（）the handling operation.

A.speed down
B.quick
C.slow down
D.facilitate

單項選擇題

Do you require any further assistance? My ship is safe now and no assistance is necessary. This VHF communication generally takes place during（）.

A.salvage operation
B.cargo discharging
C.bunkering
D.towing operation

<pre id="qkqt3"><legend id="qkqt3"></legend></pre>