单项选择题
A.Mean low water B.Mean high water C.Average water level D.Geographical sea level
The Earth’s irregular heating is caused by （）.A.the tim...
单项选择题The Earth’s irregular heating is caused by （）.
A.the time of day B.the seasons C.geography D.All of the above
The Earth has the shape of a(n) （）.A.sphereB.oblate sph...
单项选择题The Earth has the shape of a(n) （）.
A.sphere B.oblate spheroid C.spheroid of revolution D.oblate eggoid
The distance from the still water level (corrected for ...
单项选择题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
