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1977北京理1
Author:
常振虎
1977北京理1
GeoGebra
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直角坐標平面上的旋轉變換
找出對稱軸
兩組對邊相等和有直角的四邊形
兩位數加法
三位數除以一位數（一）
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端點在兩圓周線段中點軌跡
test
shuipen
a sin(bx+c) + d 的圖形的副本
单叶双曲面-双叶双曲面
Discover Topics
Function Graph
Cone
Trigonometry
Surface
Sine