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画正弦
Author:
李玲玲
GeoGebra
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平行線的判定
正方形雪花图案
第八周作业
盈利與虧蝕
异形操场
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題 2
二元线性规划的图解法(习题5)
指数函数的副本
抛物线中与三角形重心有关的轨迹.许兴华数学
三角形内角和
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Translation
Linear Programming or Linear Optimization
Angles
Incircle or Inscribed Circle
Triangles