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單項(xiàng)選擇題

The Earth has the shape of a(n) （）.

A.sphere
B.oblate spheroid
C.spheroid of revolution
D.oblate eggoid

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單項(xiàng)選擇題

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

單項(xiàng)選擇題

The distance between the surface of the water and the tidal datum is the （）.

A.range of tide
B.height of tide
C.charted depth
D.actual water depth

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