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三角函数的图像变换1
Author:
picheng
GeoGebra
New Resources
撒针估算面积实验
活动三：应用性质
平行線的判定
第八周作业2
斐波那契螺旋弧线（表格法-可动态调节）
Discover Resources
cubes
橢圓軌跡
test1(尋找北極星)
中點軌跡
線性規劃
Discover Topics
Division
Congruence
Subtraction
Linear Equations
Vectors