单项选择题
A twin screw craft being used to pick up a person who has fallen overboard from a vessel should approach if you（）.
A.reverse port engine, apply right rudder B.reverse port engine,rudder amidships C.reverse starboard engine, apply right rudder D.revers starboard engine, rudder amidships
单项选择题 A twin-screw ship going ahead on the otarboard screw only tends to move（）.
单项选择题 A vessel moored with two anchors,sometimes, at an exposed roadstead to（）.
单项选择题 A vessel’s bottom will be subjected to tension when weight is concentrated（）.
