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fchengang动画
Author:
符成岗
GeoGebra
New Resources
兩位數除以一位數（一）
判斷球體
畫出對稱圖形
三位數除以一位數（一）
異分母分數減法
Discover Resources
Square pyramid
長方體的切割(一)
圓柱
兩線段和圓的關係
多普勒效应动态演示
Discover Topics
Linear Equations
Natural Numbers
Division
Conditional Probability
Quadratic Functions