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椭圆的定义
Author:
AL
GeoGebra
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http://120.101.70.8/longlife/
New Resources
柱體建築師
兩組對邊相等的四邊形
兩位數除以一位數（一）
【案例】2018年全国1卷理科12题
第八周作业
Discover Resources
五邊形中點
分數與小數
蝴蝶定理
正三角形
N-ellipse
Discover Topics
Integral Calculus
Pyramid
Stochastic Process or Random Process
Integers
Subtraction