题目：
As the displacement of a vessel increases，the detrimental effect of free surface（）.
A.increases
B.decreases
C.remains the same
D.may increase or decrease depending on the fineness of the vessel's form
答案：
参考答案：B
As the displacement of a vessel increases，the detrimental effect of free surface（）.
A.increases
B.decreases
C.remains the same
D.may increase or decrease depending on the fineness of the vessel's form
参考答案：B
