单项选择题
Between the side frames on a vessel，support for the deck beams is provided by（）.
A.stanchions
B.brackets
C.web frames
D.deck stringers
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An upright vessel has negative GM. GM becomes positive at the angle of loll because the（）.
A.free surface effects are reduced due to pocketing
B.KG is reduced as the vessel seeks the angle of loll
C.effective beam is increased causing BM to increase
D.underwater volume of the hull is increased -
单项选择题
An inland oil barge must have equipment available to remove an on-deck oil spill of at least（）.
A.one barrel
B.two barrels
C.five barrels
D.ten barrels -
单项选择题
A shroud is（）.
A.any wire running fore-and-aft on a ship
B.any wire with a fiber core
C.a heavy wire extending from the trunk of the mast to the head of the boom
D.a heavy wire extending from the mast，atwartships to the deck，to support the mast
