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函数y=Asin(bx+c)的图象变化
Author:
许兴华数学
Topic:
Trigonometric Functions
GeoGebra
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兩組對邊相等和有直角的四邊形
GeoGebra笔记功能体验课件
拼砌四邊形
畫出對稱圖形
異分母分數減法
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百分數（小學）：折扣 / 賺賠（HTML5 版）
[問題] OP 最大投影長
so fing
DSE Circle-ACT02B Angle at centre and circumference
属于与不属于
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Sequences and Series
Ratios
Rectangle
Constructions
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