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proof24 羅文頡
Author:
郭亮偉
GeoGebra
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兩位數加法
柱體建築師
兩位數除以一位數（一）
兩位數除以一位數（二）
畫出對稱圖形
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徐州市初二年级期末试题
Liu Huis Methode zum Finden von π
拋物線與光線反射
用和或差的平方做因式分解
我的第一个GGB绘本
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Intersection
Linear Programming or Linear Optimization
Random Experiments
Rectangle
Trigonometric Functions