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橢圓2--四圓心近似法
Author:
33陳郁婷
GeoGebra
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球體建築師
【案例】2013年安徽高考15题
兩位數除以一位數（一）
算柱 (兩位數)
畫出對稱圖形
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分數乘法與除法
Vertex Form of Quadratic Functions(2) 二次函數的圖像：頂點式(2)
Rolling Star
指数函数的副本
二次方程动态函数曲线
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Constructions
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