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教学素材：椭圆离心率
Author:
清风拂琴，陌上花开
GeoGebra
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【案例】2018年全国1卷理科12题
兩組對邊相等和有直角的四邊形
球體建築師
三位數除以一位數（二）
找出對稱軸
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拋物線標準式101.11.22
優良作品2
gjh-h03-01 摺紙問題的圖形
廣義三角：tan
鉛筆畫圓
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Curve Sketching
Hypergeometric Distribution
Root
Unit Circle
Poisson Distribution