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Author:
李春培
GeoGebra
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國旗 (Claude 版)
Fibonacci Clock
sanjiaohanshu
拼砌四邊形
近似值：有效數字
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北區模考非選第二題 (2014.03.06)
先估算，後看解釋
與三半圓相切之圓
ch14 p.30#31
Copy of 周界
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Differential Equation
Sine
Exponent
Mode
Parallelogram