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- kookaburrawingLv 61 decade agoFavorite Answer
南極圈和北極圈並沒有當頭日(overhead sun)...
因為地球地軸係傾斜既,如下圖
圖片參考:http://i51.photobucket.com/albums/f382/kookaburraw...
所以無論地球轉到去太陽既邊個方位都好,太陽都唔會直射到去南極圏同北橿圏,故無當頭日
Source(s): 我的Geog 知識
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