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中間人
Author:
keihin
GeoGebra
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【案例】2018年全国1卷理科12题
畫出對稱圖形
柱體建築師
【案例】2013年安徽高考15题
異分母分數減法
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test area
内切花瓣
外心垂心問題
Brahmagupta 四邊形的構造方法
勝者即正義
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Root
Angles
Quadratic Equations
Symmetry
Definite Integral