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Author:
杨华
GeoGebra
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龙形曲线-分形龙
盈利與虧蝕
比較五件物件的重量
正方形雪花图案
平行線的判定
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階梯圖形(一)
rotational symmetry_2
Copy of 題 5
shuangquxian
昆三中课堂试用1
Discover Topics
Distributions
Percentages
Area
Matrices
Sphere