单项选择题
（）(干散) cargo is carried by bulk carriers.
A.Liquid B.Dry C.General D.Dry bulk
单项选择题 A lightship is like an/a（）(普通船舶).
单项选择题 A container ship is one of the （）(干货) ships .
单项选择题 Some ships have（）(特殊职责) ,such as tugs.
