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圓錐截痕
Author:
翰林數學領域
Topic:
Conic Sections
觀察不同情形時的截痕,可以是圓、橢圓、拋物線、雙曲線。
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【案例】2013年安徽高考15题
畫出對稱圖形
兩位數除以一位數(二)
球体的体积推导
三位數除以一位數(一)
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start and end clock face
ghk99a29 扇形旋轉
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