单项选择题
船舶的主体是船壳。()
A. The main body of a vessel is the hull. B. The main body of a vessel is the superstructure. C. The main body of a vessel is the engine room. D. The main body of a vessel is the poop.
单项选择题 从水面到甲板之间的高度称之为干舷。()
单项选择题 引水员的房间在驾驶台隔壁。()
单项选择题 我们经常保养甲板机械。()