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二重积分根据定义计算 ppt
Author:
孙豫
GeoGebra
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四邊形的特性
柱體建築師
找出對稱軸
兩位數加法
錐體建築師
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標準差：測驗
雜類(Miscellaneous)
認識y是x的函數圖形
線性變換,矩陣
transformation_enlarge/reduction
Hamid Naderi Yeganeh segment2
任意四边形各边中点的连线必构成平行四边形.许兴华数学
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Rhombus
Pie Chart or Circle Chart
Parabola
Hypothesis Testing
Intersection