问题
单项选择题
Reducing the liquid free surfaces in a vessel reduces the（）.
A.roll period
B.metacentric height
C.waterplane area
D.vessel's draft
答案
参考答案：A
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Reducing the liquid free surfaces in a vessel reduces the（）.
A.roll period
B.metacentric height
C.waterplane area
D.vessel's draft
参考答案：A