单项选择题
A survival craft being used to pick up a person who has fallen overboard from a vessel ahould approach the person（）.
A.at a high rate of speed B.under oars C.against the wind D.with the wind
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（）.
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（）.
