請問人類最早是如何發現地軸傾斜的? - 地球科學討論
By Franklin
at 2005-09-14T20:41
at 2005-09-14T20:41
Table of Contents
如題,人類是在什麼時候發現地軸傾斜,是如何發現的?
感激不盡^^
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感激不盡^^
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地球科學
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