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練習－由一元二次方程判別根的數目
Author:
Lau Sir
GeoGebra
New Resources
兩位數除以一位數（一）
三位數除以一位數（一）
【案例】圆柱体内放置一个大球六个小球
算柱 (兩位數)
異分母分數減法
Discover Resources
圓與三角形
Copy of 閱讀鐘面及數字鐘（時和分）
斜率
rectangle_tktcps
Angle (Extended 2)
Discover Topics
Perimeter
Bar Chart or Bar Graph
Conditional Probability
Plane Figures or Shapes
Stochastic Process or Random Process