The height of a light is measured from which reference plane?A.Mean low waterB.Mean high waterC.Average water levelD.Geographical sea level
The height of a light is measured from which reference plane?
A.Mean low water
B.Mean high water
C.Average water level
D.Geographical sea level
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单选题The period at high or low tide during which there is no change in the height of the water is called the （）.Arange of the tideBplane of the tideCstand of the tideDreversing of the tide
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