单项选择题
The deck beam brackets of a transversely framed vessel resist（）.
A.hogging stresses
B.sagging stresses
C.racking stresses
D.shearing stresses
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The central longitudinal structural hull strength member of the lower hulls of semisubmersible ship’s is called the（）.
A.stress plate
B.keel
C.rider plate
D.main beam -
单项选择题
Support of ship side plating is provided primarily by transverse（）.
A.beams
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D.bulkheads -
单项选择题
Structural stress on a ship can be reduced by（）.
A.lessening the effect of environmental forces
B.even and symmetrical variable loading
C.local concentration of heavy consumables
D.increasing the metacentric height
