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相向而行的兩行進波
Author:
ipc Wang
f(x,t)=sin(3x-2t) g(x,t)=sin(3x+2t)
GeoGebra
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兩位數加法
球體建築師
球体的体积推导（优化版）
GeoGebra笔记功能体验课件
四邉形 (四年級) 教師版
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以 Unit Circle 了解 Sine 的正/負
index
y=(x-1)^0.33+(x-3)^0.33+(x-5)^0.33
向量比換面積比
Degrés vers radians
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Planes
Continuity
Division
Linear Equations
Trapezoid