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内凹 正方形
Author:
数豆豆
GeoGebra
New Resources
撒针估算面积实验
活动三：应用性质
平行線的判定
科氏力 (Coriolis Force)
第八周作业2
Discover Resources
Rotational Symmetry - Octahedron
優良作品1(沛綺)
體積的量度 4
行星軌跡
旋轉體：Washer Method的副本
Discover Topics
Cosine
Fractions
Subtraction
Trapezoid
Means