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20190220 Q2
Author:
Franky_0219
GeoGebra
New Resources
平行線的判定
圓的切線方程
龙形曲线-分形龙
科氏力 (Coriolis Force)
盈利與虧蝕
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整數或分數÷分數_ 工作紙（一）_題2a
I am superman
Apollonius Problem gergonne 1
求兩斜線區域的差
s1118931
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Parabola
Square
Distributions
Tangent Line or Tangent
Parallelogram