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vertex of quadratic function
Author:
Felix Yip Wing Chung
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拼砌四邊形
【案例】2018年全国1卷理科12题
兩組對邊相等的四邊形
異分母分數減法
錐體建築師
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平面幾何
gltyz 矩形旋轉體
橢圓
拋物線6--包絡線法
S0E6 三角形三边关系
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Bar Chart or Bar Graph
Scalene Triangles
Linear Functions
Means
Statistical Characteristics