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1977江苏1(7)
Author:
常振虎
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
Earth with coastline
美國國旗 (Claude 版)
近似值：有效數字
sanjiaohanshu
Discover Resources
正弦定理
尺規作圖乾淨版
掃描不等式圖
GeoGebraBook(for20151202)
正玄函数变化
Discover Topics
Trapezium
Triangles
Normal Distribution
Rotation
Cuboid