A.最少 B.最多 C.平均值 D.中值
A.1/2~2/3 B.1/3~2/3 C.1/3~1/2 D.1/2~3/4
A.4~45.1000.5 B.4~50.1000.10 C.4~55.2000.5 D.4~60.2000.10