单项选择题

The ship’s draught forward is slightly deeper than the draught aft．This condition is called（）in shipping terms.

A.trim by the head
B.trim by the stern
C.even keel
D.drafts different

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单项选择题
The ship’s draught forward is same as her draught aft.This condition is named as（）.

A.even keel
B.even trim
C.even draught
D.even float
单项选择题
In the absence of external forces，the center of gravity of a floating vessel is located directly above the（）.

A.metacenter
B.amidships
C.center of flotation
D.geometric center of the displaced volume
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