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TANG TSZ YUEN
GeoGebra
TANG Tsz-yuen
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四邉形 (四年級) 教師版
sanjiaohanshu
兩組對邊相等和有直角的四邊形
兩組對邊相等的四邊形
【案例】2018年全国1卷理科12题
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Reflectional Symmetry 反射對稱
整數或分數÷分數_ 工作紙（一）_題1d
拋物線5--包絡線法
二次函数问题
我的第一个GGB绘本
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Piecewise Functions
Fractions
Percentages
Median Line
Straight Lines