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fchengang动画
Author:
符成岗
GeoGebra
New Resources
撒针估算面积实验
活动三:应用性质
平行線的判定
比較五件物件的重量
第八周作业
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函數邏輯式
二次函數:過任意三點,求函數關係式
frog 4
semops_圓錐
線性規劃
Discover Topics
Prism
Line Segment
Multiplication
Vectors 2D (Two-Dimensional)
Tangent Line or Tangent