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test2
Author:
chengshihfeng
GeoGebra
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畫出對稱圖形
判斷球體
【案例】2013年安徽高考15题
柱體建築師
錐體建築師
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精神堡壘
GeoGebraBook(for20151202)
向量座標
橢圓的定義
拋物線6 包絡線法
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Poisson Distribution
Constructions
Square
Conic Sections
Difference and Slope