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waaachen
Author:
陳兪宏
孟哲老師解法
GeoGebra
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【案例】2013年安徽高考15题
拼砌四邊形
錐體建築師
兩位數除以一位數（二）
第八周作业
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Addition and Subtraction of Directed Numbers (1) 有向數加減(1)
n star
Copy of 題 5
立體網狀圖
C60足球模型
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Unit Circle
Scatter Plot
Pie Chart or Circle Chart
Standard Deviation
Right Triangles