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Author:
sealion1215
GeoGebra
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畫出對稱圖形
【案例】2013年安徽高考15题
柱體建築師
三位數除以一位數（一）
算柱 (兩位數)
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一个圆的若干竞赛异型题
圓繞圓
Ambiguous Cone
分步骤展示作图过程样例
我的第一个绘本
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Secant Line or Secant
Square
Geometric Mean
Hypothesis Testing
Linear Programming or Linear Optimization