单项选择题
A.also called decks B.vertical transverse plates connecting the vertical keel with the margin plates C.large beams fitted in various parts of the vessel for additional strength D.found in passenger and berthing spaces only
Floors aboard ship are（）.A.frames to which the tank top...
单项选择题Floors aboard ship are（）.
A.frames to which the tank top and bottom shell are fastened on a double bottomed ship B.transverse members of the ships frame which support the decks C.longitudinal beams in the extreme bottom of a ship from which the ships ribs start D.longitudinal angle bars fastened to a surface for strength
Frames to which the tank top and bottom shell are faste...
单项选择题Frames to which the tank top and bottom shell are fastened are called（）.
A.floors B.intercostals C.stringers D.tank top supports
Freeing ports on a vessel with soild bulwards（）.A.preve...
单项选择题Freeing ports on a vessel with soild bulwards（）.
A.prevent stress concentration in the bulwark B.permit easy jettison of deck cargo in an emergency C.provide opening through the bulwarks for mooring lines D.allow water shipped on deck to flow off rapidly
