A组:1,6,7,12,13,18.B组:2,5,8,11,14,17.C组:3,4,9,10,15,16,.173在哪组的第几个?

问题描述:

A组:1,6,7,12,13,18.B组:2,5,8,11,14,17.C组:3,4,9,10,15,16,.173在哪组的第几个?

在B组第57个