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Author:
wtse2000
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球體建築師
【案例】2013年安徽高考15题
算柱 (兩位數)
兩位數除以一位數（二）
【案例】2018年全国1卷理科12题
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周界-平移法(練習二)
定周长的正多边形面积变化规律
no10
比例中的定值問題
極線對偶定理 / polar duality theorem 的複本
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Incircle or Inscribed Circle
Quadratic Functions
Hyperbola
Ratios
Inequalities
