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折線軌跡
Author:
artinian
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柱體建築師
【案例】2018年全国1卷理科12题
球體建築師
兩位數除以一位數（一）
拼砌四邊形
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sincos
Ex5C#15
題4
circle
鉛筆畫圓
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Sine
Rotation
Median Line
Matrices
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