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乘法分配律（a+b）c
Author:
尹枝红
GeoGebra
New Resources
折扣
比較五件物件的重量
三角函数 的副本
平行線的斜率
第八周作业2
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Triangle 02
體積的量度 5
ghseh 二次函數描點法左右平移-1
Ex5C#11
线性规划
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Pie Chart or Circle Chart
Calculus
Addition
Dilation
Integral Calculus