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钟表制作成功啦
Author:
辛贺华
GeoGebra
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GeoGebra笔记功能体验课件
找出對稱軸
球体的体积推导（优化版）
四邊形的特性
錐體建築師
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形心
五下_分數除法( 教師版)
二次函数与一元二次方程和一元二次不等式
p04 fixed distance from a line
黄金螺线与向日葵-朱老师
Discover Topics
Volume
Normal Distribution
Equilateral Triangles
Set Theory
Functions