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illusiion 6 平行线错觉
Author:
arist
GeoGebra
New Resources
正方形雪花图案
比較五件物件的重量
第三周作业效果演示
斐波那契螺旋弧线（表格法-可动态调节）
第八周作业
Discover Resources
比和比值
五上_分數乘法(教師版)
研習講義
My second work
heart
Discover Topics
Arithmetic Operations
Ellipse
Distributions
Calculus
Piecewise Functions