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劉德晧proof14
Author:
郭亮偉
GeoGebra
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拼砌四邊形
【案例】2018年全国1卷理科12题
GeoGebra笔记功能体验课件
異分母分數減法
球体的体积推导（优化版）
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sincos
gtx-f03-usa-01 美國國旗
線性組合性質
三相交流电波形模拟
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Confidence Interval
Normal Distribution
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