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- 4若这组数据5,8,9,3,5,10,a的平均数是8,则a=(),这组数据的中位数是()
- 5翻译这句话Enable the firm to achieve economies of scale.
- 6一个三角形的面积是4分之15平方厘米,它的底是10厘米,它的底边上的高是多少厘米
- 7Your friend asks you goto his home to attend a birthday party at 6:00 in the afternoon.you'd better get there at?
- 8圆锥的母线长为8,它的轴截面的顶角是直角,则它的侧面积是
- 9They are __(回)to Hong Kong next month.
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