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【单选题】

The distance from the still water level (corrected for tides and storm surge) to the bottom of the hull of a ship is the（）.

A、air gap

B、freeboard

C、penetration

D、water depth

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第2题
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第3题
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第5题
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第9题
[单选题] Charted depth is the（）.

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第10题
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