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Author:
赵林
GeoGebra
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兩組對邊相等和有直角的四邊形
兩組對邊相等的四邊形
異分母分數減法
三位數除以一位數(二)
【案例】2018年全国1卷理科12题
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eye tracing
拋物線的光學性質
testing2
空間中的平面
a sin(bx+c) + d 的圖形的副本
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Triangles
Planes
Line Segment
Similarity Transformation or Similarity
Histogram