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Author:
junfeilx
GeoGebra
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四邊形的特性
兩位數加法
【案例】2013年安徽高考15题
異分母分數減法
兩位數除以一位數（二）
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製作組織圖
No.5
BkD_act15_02c
線性規劃
滑轮组2
Discover Topics
Arithmetic Operations
Special Points
Intersection
Bar Chart or Bar Graph
Cylinder