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US Unemployment 200701~201707
Author:
Yu-Tuan Lin
GeoGebra
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球体的体积推导（优化版）
【案例】2013年安徽高考15题
兩位數加法
拼砌四邊形
GeoGebra笔记功能体验课件
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相似形_Collection
小六 圓周
平行線的性質的副本
Illusion-外凸的正方形
勾股定理III 基於歐基里德(Euclid)的證明
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Combinatorics
Equilateral Triangles
Bar Chart or Bar Graph
Difference and Slope
Symmetry