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Author:
yhf
GeoGebra
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【案例】2013年安徽高考15题
異分母分數減法
柱體建築師
判斷球體
三位數除以一位數（一）
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中心对称的概念
菱形
進出刀量測-圓形
跳動的愛心－立體版
數學電腦繪圖與解題
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Area
Differential Equation
Kite
Prism
Inequalities