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練習－由一元二次方程判別根的數目
Author:
Lau Sir
GeoGebra
New Resources
球体的体积推导（优化版）
畫出對稱圖形
兩位數除以一位數（一）
異分母分數減法
第八周作业
Discover Resources
大樂透開獎機
題4
猜猜平均數（限時版）
直線族
除法Q2
Discover Topics
Differential Equation
Natural Numbers
Isosceles Triangles
Piecewise Functions
Indefinite Integral