网址:http://m.1010jiajiao.com/timu3_id_4469171[举报]
设集合,则
A.{1} B.{1,2} C.{2} D.{0,1,2}
A.{1} B.{1,2} C.{0,1,2} D.{2}
设集合,则 ( )
A.{1,3} B.{2,4} C.{1,2,3,5} D.{2,5}