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mingyeh1214
GeoGebra
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中华人民共和国国旗
异形操场
平行線的判定
折扣
斐波那契螺旋弧线(表格法)
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整數或分數÷分數_ 工作紙(一)_題2b
圓形,三角形軌跡觀察
斜率與y截距
ppppp
半椭圆面积的定积分动态演示.许兴华数学
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Ratios
Inequalities
Symmetry
Geometric Transformations
Reflection