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異分母分數減法
球体的体积推导(优化版)
拼砌四邊形
兩組對邊相等的四邊形
算柱 (兩位數)
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正九邊形
P3 平行與垂直
立體圖
gjh-g03-00 和的平方公式的副本
S3 Ch4.3 試做4.6b 三視圖(3D圖)
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Surface
Mathematics
Distributions
Scalene Triangles
Vectors