(-a3)4+(-a4)3等于( ) A.O B.-2a12 C.2a12 D. 发布时间:2017-04-27 23:35 │ 来源:www.tikuol.com 题型:选择题 问题: (-a3)4+(-a4)3等于( )A.OB.-2a12C.2a12D.-2a7