网址:http://m.1010jiajiao.com/timu_id_1648507[举报]
设集合=
A. B.[0,2] C. D.
A.{1} B.{1,2} C.{2} D.{0,1,2}
设集合
A.{0,1} B.{-1,0,1} C.{0,1,2} D.{-1,0,1,2}