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Author:
李明
GeoGebra
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科赫雪花
折扣
第八周作业
撒针估算面积实验
平行線的判定
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畢式定理 (03)
滑桿應用
骨牌
P4_四下_面積(一)(教師版)
有理数与无理数
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Function Graph
Centroid or Barycenter
Cylinder
Prism
Surface