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Author:
李春培
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GeoGebra
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球体的截面
GeoGebra数学资源(4-8年级)
中华人民共和国国旗
科赫雪花
盈利與虧蝕
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遞迴數列的星星
Easter egg
補角關係
拋物線的兩切線
比較角的大小3
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Cube
Rectangle
Random Experiments
Inequalities
Histogram