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中心对称的性质
Author:
吕胜
GeoGebra
New Resources
兩位數加法
【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）
拼砌四邊形
四邊形的特性
Discover Resources
挑战中考压轴题
正三角形內部一點
圖形周界_2
圓外切及內切
橢圓規Ellipsograph (Trammel of Archimedes)
Discover Topics
Sphere
Linear Regression
Upper and Lower Sum or Riemann Sum
Hypothesis Testing
Function Graph