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Author:
Alex Leong
GeoGebra
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異分母分數減法
【案例】2013年安徽高考15题
球體建築師
四邊形的特性
判斷球體
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eye tracing
長方體的切割(二)
弹簧变化
Ex5D#8
半圆面积的微积分动态演示.许兴华数学
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Parallelogram
Cuboid
Percentages
Root
Angles