题目内容
方程x2-1=0的解集用列举法表示为( )
2021-09-16
A.{x2-1=0}
B.{x∈R|x2-1=0}
C.{-1,1}
D.以上都不对
试卷相关题目
SQL Error: select id,body,options from ***_enewstiku_ where sourceid='23065' and id < 2022303 and id<>'2022303' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='23065' and id > 2022303 and id<>'2022303' order by id asc limit 5