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圓錐曲線的光學性質
Author:
陳隆期
GeoGebra
New Resources
球体的体积推导
平行線的斜率
漂亮的摇摆曲线
三位數除以一位數（二）
祖冲之的期望：内棋与外棋
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優良作品8(宜庭)
體積的量度 3
Volume of the Cuboid
Shen Kuo Frustum
Quiz on Discriminant 判別式：測驗
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Random Variables
Piecewise Functions
Straight Lines
Expected Value
Sphere