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單項選擇題

The Earth’s irregular heating is caused by （）.

A.the time of day
B.the seasons
C.geography
D.All of the above

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單項選擇題

The Earth has the shape of a(n) （）.

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

單項選擇題

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

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