当晨昏圈与经线圈重合时,下列说法正确的是(    )     A.北极

当晨昏圈与经线圈重合时,下列说法正确的是(    )    

A.北极圈上的正午太阳高度为0     B.全球各地昼夜平分

C.地球位于近日点附近            D.南极洲常出现极光现象

答案

B

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