单项选择题
That is a ()(救助船).
A.dredger B.LASH C.salvage vessel D.barge
单项选择题 It is not a ()(挖泥船 ).
单项选择题 The tug can tow and push()(超级油轮 )into position.
单项选择题 The ()(载驳船) carries loaded lighter on board.