单选题Floors aboard ship are（）.Aframes to which the tank top and bottom shell are fastened on a double bottomed shipBtransverse members of the ships frame which support the decksClongitudinal beams in the extreme bottom of a ship from which the ships ribs startDlongitudinal angle bars fastened to a surface for strength
单选题
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
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