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钟表制作成功啦
Author:
辛贺华
GeoGebra
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祖冲之的期望：内棋与外棋
兩位數除以一位數（二）
球体的体积推导
三位數除以一位數（二）
讀磅
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Is this a prism 7
擴分、約分及比較大小
Torus
三角形有向面積
S6 Vectors
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Probability
Statistical Characteristics
Hyperbola
Scalene Triangles
Polygons