问题
单项选择题
When the density of water is 1000,i.e.in fresh water and in summer zone a ship may load to the upper edge of the line marked（）.
A.S
B.T
C.W
D.F
答案
参考答案：D
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When the density of water is 1000,i.e.in fresh water and in summer zone a ship may load to the upper edge of the line marked（）.
A.S
B.T
C.W
D.F
参考答案：D