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Author:
肖昆明
GeoGebra
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【案例】2018年全国1卷理科12题
異分母分數減法
畫出對稱圖形
兩組對邊相等的四邊形
球体的体积推导（优化版）
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路徑四動畫
NCM(2nd)
工作天時
顶顶顶顶顶顶顶顶顶顶
S.3 ch7 area and volume 3
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Definite Integral
Combinatorics
Numbers
Geometry
Arithmetic