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选修一P116-14求椭圆平行弦中点的轨迹
Author:
jjx01
Topic:
Ellipse
GeoGebra
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畫出對稱圖形
兩位數除以一位數（二）
拼砌四邊形
GeoGebra笔记功能体验课件
錐體建築師
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gjh-h04-01 多個堆疊的直角三角形
Indices 5
ANGLES
椭圆中的对称斜率为定值问题20190917
椭圆的参数方程的副本
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Straight Lines
Probability
Differential Equation
Planes
Combinatorics