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椭圆的离心率
Author:
孟宝兴
制作：@佳木斯韩清华 ，修订：孟宝兴
GeoGebra
New Resources
異分母分數減法
第八周作业
三位數除以一位數（一）
拼砌四邊形
判斷球體
Discover Resources
尤拉線80503余欣儒螢橋國中
三圓外切
向量合成
Q3-12
方块堆叠
Discover Topics
Parametric Curves
Linear Regression
Geometric Mean
Quadratic Functions
Trigonometry