单选题An occulting light is one in which （）.Athe period of darkness exceeds the period of lightBthere is only a partial eclipse of the lightCthe periods of light and darkness are equalDthe period of light exceeds the period of darkness
单选题
An occulting light is one in which （）.
A
the period of darkness exceeds the period of light
B
there is only a partial eclipse of the light
C
the periods of light and darkness are equal
D
the period of light exceeds the period of darkness
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