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地球儀
Author:
莊宗達
GeoGebra
New Resources
柱體建築師
球体的体积推导（优化版）
【案例】2013年安徽高考15题
【案例】圆柱体内放置一个大球六个小球
判斷球體
Discover Resources
門格海綿 (Menger Sponge)
SSA為何不能保證全等
圆锥曲线包络
P4_四下_面積（一）(教師版)
射线上滚动椭圆
Discover Topics
Division
Centroid or Barycenter
Diagrams
Poisson Distribution
Natural Numbers