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1平方度等于多少平方千米

更新时间: 2020-10-03 00:00:00     

平方度是一个量度天体在天球所占面积的单位,大小约相等于一个边长各一度。由于一个圆形有360度,天球的总面积若以“平方度”来作单位,则约41252、96平方度。

关键词: 平方 等于 多少 千米

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