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

單項選擇題

Generally, what is used to inflate life rafts?（）.

A.Non-toxic gas
B.oxygen
C.Hydrogen
D.Helium

你可能感興趣的試題

單項選擇題

Generally, when lifting an inflatable life raft back aboard ship you would use the（）.

A.towing bridle
B.main weather cover
C.external lifelines
D.righting strap

單項選擇題

Get the searchlight（）for transiting the cancal at night.

A.turned off
B.already
C.almost
D.ready

<sup id="ojzqe"><pre id="ojzqe"><div id="ojzqe"></div></pre></sup>

<em id="ojzqe"></em>