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Doorsnede
Author:
lin94127
GeoGebra
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兩組對邊相等的四邊形
四邉形 (四年級) 教師版
兩位數除以一位數（二）
異分母分數減法
柱體建築師
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三宅一生132 5
homework
重难题组周练（1）——二次函数
两个经典不等式
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Symmetry
Parametric Curves
Exponential Functions
Similarity Transformation or Similarity
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