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滑轮组2
Author:
褚 军
Topic:
Algebra
GeoGebra
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兩組對邊相等和有直角的四邊形
兩位數除以一位數（一）
兩組對邊相等的四邊形
兩位數除以一位數（二）
找出對稱軸
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題10
Sphere[O, r]
圓錐
四下_認識小數(教師版)
橢圓2-四圓心近似法
Discover Topics
Surface
Sphere
Translation
Continuity
LCM and GCD