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几何模版：线段关系练习
Author:
艳er
GeoGebra
New Resources
异形操场
正方形雪花图案
活动三：应用性质
平行線的判定
百分數及其應用
Discover Resources
GGB研習作品
多重刻度磅
動態模擬(摺紙）(1060724)
sequence-circle
圓周_心算題01
Discover Topics
Scalene Triangles
Cylinder
Sequences and Series
Arithmetic
Inequalities