单项选择题
A twin-screw ship going ahead on the otarboard screw only tends to move（）.
A.in a straight line B.to port C.from side to side D.to starboard
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（）.
单项选择题 A vessel’s quarter is that section which is（）.
