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折扣 例1的副本
Author:
冯圣军
,
GeoGebra Institute of Hong Kong
GeoGebra
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【案例】2018年全国1卷理科12题
球体的体积推导（优化版）
球體建築師
兩組對邊相等的四邊形
四邊形的特性
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橢圓
旋转体的定义
小四平面圖形學習單
梅花
鉛筆畫圓
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Sine
Numbers
Division
Quadratic Functions
Matrices