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拋物面的光學性質
Author:
宋政蒲
GeoGebra
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【案例】圆柱体内放置一个大球六个小球
GeoGebra笔记功能体验课件
兩位數除以一位數（二）
算柱 (兩位數)
拼砌四邊形
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test
shuipen
凸透镜成像
用交轨法求动点的轨迹方程图.许兴华数学
二次函數a的意義
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Median Value
Kite
Frequency Distribution
Exponent
Distributions