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GeoGebra
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斜率的值
空间中两直线的位置关系
兩位數除以一位數（一）
球体的体积推导
第八周作业
Discover Resources
方向導數與梯度 (Gradient)
音調與空氣柱
黃金矩形
第一題
黃金矩形
Discover Topics
Percentages
Translation
Power Functions
Integral Calculus
Quadrilaterals