问题
单项选择题
Keeping the draft at or below the load line mark will insure that the vesselhas adequate（）.
A.ballast
B.reserve buoyancy
C.displacement
D.rolling periods
答案
参考答案：B
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Keeping the draft at or below the load line mark will insure that the vesselhas adequate（）.
A.ballast
B.reserve buoyancy
C.displacement
D.rolling periods
参考答案：B