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必修一第二章第四节二次函数的性质在研究
Author:
符成岗
GeoGebra
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三位數除以一位數（二）
【案例】2018年全国1卷理科12题
兩組對邊相等和有直角的四邊形
柱體建築師
兩組對邊相等的四邊形
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正方形
學資p.13第7題
How to draw an ennegon with ruler and compasses?
勝者即正義
圓與切線
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Hypergeometric Distribution
Prism
Set Theory
Pie Chart or Circle Chart
Parametric Curves