若5a2bm+3与-52an-1b5是同类项,则mn的值为( ) A.5 B.6 C. 发布时间:2017-05-26 16:55 │ 来源:www.tikuol.com 题型:选择题 问题: 若5a2bm+3与-52an-1b5是同类项,则mn的值为( )A.5B.6C.4D.3
题型:选择题 Although the official didn’t mention any names, everyone knew who he _____. A.refers toB.had referred toC.has referred toD.was referring to 查看答案