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dynamics dragon
Author:
赵林
GeoGebra
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【案例】2018年全国1卷理科12题
四邊形的特性
三位數除以一位數（二）
畫出對稱圖形
異分母分數減法
Discover Resources
regular hexagon construction
拋物線(到一點與到一直線等距離的軌跡)
congruent activity
畢氏定理拼圖007(8片)
老師講解6
Discover Topics
Median Value
Arithmetic Mean
Distributions
Bar Chart or Bar Graph
Step Functions