In the absence of external forces，the center of gravity of a floating vessel is located directly above the（）.

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