问题
单项选择题
When liquid is free to move transversely in a tank, the effect is called（）.
A.Free communication
B.Free fensity
C.Free surface
D.Negative GM
答案
参考答案：C
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When liquid is free to move transversely in a tank, the effect is called（）.
A.Free communication
B.Free fensity
C.Free surface
D.Negative GM
参考答案：C