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线绕成弧（弧展成线)
Author:
吴礼荣
Topic:
Trigonometric Functions
GeoGebra
New Resources
平行線的判定
第三周作业效果演示
折扣
第八周作业2
常见四边形是否是双心四边形
Discover Resources
Stem and Leaf(幹葉圖)
GeoGebra
圓柱切割
Rolling Square
串珠(大小不同)
Discover Topics
Definite Integral
Exponential Functions
Statistical Characteristics
Hypergeometric Distribution
Division