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soccer(final)
Author:
kurt lan
GeoGebra
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撒针估算面积实验
平行線的判定
中华人民共和国国旗
第三周作业效果演示
百分數及其應用
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tccs work
index
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cube
圖形的周界
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Differential Calculus
Quadratic Functions
Arithmetic Operations
Circle
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