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漂亮的摇摆曲线
【案例】2018年全国1卷理科12题
第八周作业
祖冲之的期望：内棋与外棋
兩位數除以一位數（二）
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繪畫三角形的外接圓
Is this a prism 13
언제부터인지 몰르겟는데 ..
拋物線6--包絡線法
C60足球模型
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Constructions
Hyperbola
Logarithmic Functions
Rectangle
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