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频率与概率——投掷硬币的试验
Author:
Zhang Guangmin
Topic:
Probability
GeoGebra
New Resources
兩組對邊相等的四邊形
三位數除以一位數（二）
柱體建築師
兩位數除以一位數（二）
第八周作业
Discover Resources
happy birthday
正四面體的反射對稱
Escher 階梯 (Penrose Stair)
一元二次方程求根公式
圖三 的複本
Discover Topics
Sequences and Series
Cylinder
Equations
Curve Sketching
Cosine