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真分數乘以真分數
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畫出對稱圖形
sanjiaohanshu
兩組對邊相等和有直角的四邊形
錐體建築師
【案例】2018年全国1卷理科12题
Opdag Ressourcer
Ratio of angles at the centre and the length of the arcs.
Is this a prism 3
Quiz on Solving Right Triangles (Finding Angles) 解直角三角形：測驗2（求角度）
Exploration task
正弦函数图象
Udforsk emner
Plane figurer eller former
Ubestemte Integral
Gennemsnit
Trapez
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