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毕氏螺线
Author:
汪娟
GeoGebra
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比較五件物件的重量
镂空正方体案例对比
椭圆内切圆链
盈利與虧蝕
百分數及其應用
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教學-棱錐摺紙樣式
腳踏車
Multiplication of Directed Numbers
Quiz on Addition and Subtraction of Directed Numbers (2)
函数
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Complex Numbers
Probability
Tangent Function
Trigonometric Functions
Linear Equations