2,6,13,39,15,45,23,( )A.46 B.66 C.68 D.69 发布时间:2017-05-23 11:30 │ 来源:www.tikuol.com 题型:单项选择题 问题: 2,6,13,39,15,45,23,( )A.46B.66C.68D.69