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喜欢体育，特别是球类运动和自行车运动，户外运动，
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「相似三角形」任务5的副本
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「相似三角形」任务4的副本
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「相似三角形」任务3的副本
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「相似三角形」任务2的副本
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「相似三角形」任务1的副本
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三角函数图像变换动画演示
孟洪刚
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分段函数
GeoGebra Institute of WuXi
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包絡線：雙曲線
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包絡線：橢圓
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包絡線：拋物線
羅驥韡 (Pegasus Roe)
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正弦定理
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餘弦定理
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