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中考2019北京—24
Author:
宋晓燕
GeoGebra
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GeoGebra笔记功能体验课件
拼砌四邊形
兩位數除以一位數（二）
算柱 (兩位數)
兩組對邊相等和有直角的四邊形
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圓定理2.1
找出活動所用的時間
perd fr ctr bisect
練習_對稱
海螺
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Sine
Square
Fractions
Vectors
Combinatorics