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國道etag收費
Author:
李春培
國道收費.
GeoGebra
New Resources
柱體建築師
畫出對稱圖形
四邊形的特性
兩位數除以一位數（二）
兩組對邊相等的四邊形
Discover Resources
Task4
反餘弦函數
正三角形
正12面體
國旗
Discover Topics
Statistics
Linear Functions
Fractions
Poisson Distribution
Differential Equation