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陳隆期
GeoGebra
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畫出對稱圖形
拼砌四邊形
錐體建築師
第八周作业
三位數除以一位數（一）
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數位學習社103 12 15
perd fr ctr bisect
tan90
大黨小黨－政黨票的掙扎
乘法的副本
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Equations
Surface
Rational Numbers
Tree Diagrams
Orthocenter