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关于椭圆的一个性质
Author:
孟宝兴
GeoGebra
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【案例】2018年全国1卷理科12题
兩位數除以一位數(二)
柱體建築師
判斷球體
三位數除以一位數(一)
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翰林B4講p192-例1
S5 2D Trigonometry
解題四
外心
圓外角測試
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Ratios
Pyramid
Circle
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