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标准正态分布
Author:
张志勇
GeoGebra
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圓的基本性質
撒针估算面积实验
龙形曲线-分形龙
盈利與虧蝕
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Erdos-Mordell 不等式
滚动的硬币
偽國中數學幾何題
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加減乘除运算 出题器【有数字键盘】
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