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圓在直線上滾動
Author:
rachmaninoff
GeoGebra
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比較五件物件的重量
椭圆内切圆链
斐波那契螺旋弧线(表格法)
第八周作业2
小学资源收集
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三個硬幣的正面數
CLOCK
经纬度
ggb 優良作品_10
图形的放大与缩小.许兴华数学
Discover Topics
Logarithm
Quadratic Equations
Differential Calculus
Integral Calculus
Circle