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GeoGebra
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判斷球體
三位數除以一位數（二）
兩組對邊相等的四邊形
GeoGebra笔记功能体验课件
拼砌四邊形
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正十二面體
E-X 电势-X
Fraction to Decimal
盾牌
假分數化帶分數
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Statistics
Kite
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