问题 选择题 甲、乙两组数据分别为甲:28,31,39,45,42,55,58,57,66;乙:29,34,35,48,42,46,55,53,55,67则甲、乙的中位数分别是( )A.45,44B.45,47C.42,46D.42,47 答案 答案:B