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回旋加速器
Author:
贾坤(模型库)
GeoGebra
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三位數除以一位數（一）
兩組對邊相等的四邊形
異分母分數減法
三位數除以一位數（二）
柱體建築師
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waaachen
百分數：折扣、盈利與虧損
gjh-h01-01 畢氏數三角形
黃金矩形
点、线、角
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Random Experiments
Inequalities
Histogram
Definite Integral
Perimeter