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3.1.2-椭圆的几何性质（扁平程度的变化）
Author:
贾红朝
GeoGebra
New Resources
拼砌四邊形
GeoGebra笔记功能体验课件
三位數除以一位數（一）
第八周作业
【案例】圆柱体内放置一个大球六个小球
Discover Resources
waaachen
Proof of Pythagoras Theorem
gsx-a01-06 數線上的點
Angles between line and planes in a cuboid
Copy of 分數比較
Discover Topics
Limits
Addition
Boxplot
Curve Sketching
Median Line