船舶的主体是船壳。（）<br>A:The main body of a vessel is the hull.<br>B:The main body of a vessel is the superstructure.<br>C:The main body of a vessel is the engine room.<br>D:The main body of a vessel is the poop.

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.

出自：船舶水手证

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