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求一數是另一數的幾分之幾（比較）
Author:
Tong Wing Hong
GeoGebra
New Resources
兩組對邊相等的四邊形
判斷球體
球體建築師
柱體建築師
拼砌四邊形
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index
test1
ptccs2new
關燈遊戲
乘法训练
Discover Topics
Linear Programming or Linear Optimization
Square
Continuity
Parametric Curves
Integral Calculus