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

<dl id="flsq9"></dl>

<ruby id="flsq9"><xmp id="flsq9"></xmp></ruby>

單項選擇題

The principal danger from ice collecting on a vessel is the（）.

A.decrease in capabilities of radar
B.decrease in displacement
C.adverse effect on trim
D.loss of stability

你可能感興趣的試題

單項選擇題

Your vessel is approaching a bend. You hear a prolonged blast from around the bend. You should （）.

A.back your engines
B.stop your engines and drift
C.answer with one prolonged blast
D.sound the danger signal