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四邊形的特性
【案例】2018年全国1卷理科12题
sanjiaohanshu
判斷球體
兩組對邊相等的四邊形
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happy birthday
阿波羅圓
密鋪8
根據百分率找數量（二）: 例2的副本
Quiz on Addition and Subtraction of Directed Numbers (2)
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Symmetry
Histogram
Angles
Root
Coordinates