问题
单项选择题
For an upright vessel，draft is the vertical distance between the keel and the（）.
A.waterline
B.freeboard deck
C.plimsoll mark
D.amidships section
答案
参考答案：A
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For an upright vessel，draft is the vertical distance between the keel and the（）.
A.waterline
B.freeboard deck
C.plimsoll mark
D.amidships section
参考答案：A