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光芒之星
Author:
李春培
光芒之星
GeoGebra
New Resources
兩位數除以一位數（一）
【案例】2013年安徽高考15题
球体的体积推导（优化版）
柱體建築師
兩組對邊相等的四邊形
Discover Resources
貝氏曲線
九點共圓
艾薛爾Escher
识货
滑轮组2
Discover Topics
Combinatorics
Stochastic Process or Random Process
Continuity
Geometry
Pythagoras or Pythagorean Theorem