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zhihuai1982
GeoGebra
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柱體建築師
【案例】2013年安徽高考15题
兩位數除以一位數(二)
兩組對邊相等的四邊形
找出對稱軸
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[工具箱] 標示長度
畢氏定理完成20170330
Shoplifting and theft histogram
表示數線上的位置
洋葱初中数学
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Cone
Quadratic Equations
Unit Circle
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