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王宏銘Proof93
Author:
郭亮偉
GeoGebra
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【案例】2013年安徽高考15题
三位數除以一位數（一）
兩位數除以一位數（一）
算柱 (兩位數)
四邉形 (四年級) 教師版
Discover Resources
tool for age question
掃描不等式 (講義版)
Torus
佑玟ggb book
圖一
Discover Topics
Arithmetic Mean
Quadratic Functions
Polynomial Functions
Polygons
Rotation