单项选择题

Aboard ship，vertical flat plates running transversely and connecting the vertical keel to the margin plates are called（）.

A.floors
B.intercostals
C.girders
D.stringers

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单项选择题
A vessel having continuous closely spaced transverse strength members is（）.

A.longitudinally framed
B.transversely framed
C.cellular framed
D.web framed
单项选择题
A term applied to the bottom shell plating in a double-bottom ship is（）.

A.bottom floor
B.outer bottom
C.shear plating
D.tank top
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