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力的合成
Author:
凉 清
GeoGebra
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三角函数 的副本
盈利與虧蝕
科赫雪花
异形操场
撒针估算面积实验
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圓錐曲線軌跡 (1)
【三角函數】sinx的平移
圈柱切割
quiz 9.1 2(a)
圖形的周界
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Cone
Cosine
Upper and Lower Sum or Riemann Sum
Vectors
Histogram