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过圆上一点作切线，三步
Author:
u.jianwang
GeoGebra
New Resources
【案例】圆柱体内放置一个大球六个小球
三位數除以一位數（二）
兩位數加法
兩組對邊相等的四邊形
兩位數除以一位數（二）
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Direct and Inverse Variation 正變與反變
正12面體內接正四面體
線型函數與圖形
擲兩個硬幣的機率分布的副本
双曲线的参数方程的副本
Discover Topics
LCM and GCD
Binomial Distribution
Plane Figures or Shapes
Natural Numbers
Difference and Slope