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國二理化_凹面鏡
Author:
林冠曄
GeoGebra
New Resources
異分母分數減法
【案例】2013年安徽高考15题
錐體建築師
畫出對稱圖形
兩位數除以一位數（一）
Discover Resources
對數的遞增或遞減(底數小於1)
測試
test2
點之極線定理 / polar of a point theorem
Lens2
Discover Topics
Optimization Problems
Linear Equations
Right Triangles
Algebra
Sine