题目内容
若a∈R,则“a=1”是“|a|=1”的( )
2021-08-22
A.充分而不必要条件
B.必要而不充分条件
C.充要条件
D.既不充分又不必要条件
试卷相关题目
SQL Error: select id,body,options from ***_enewstiku_ where sourceid='19896' and id < 1727746 and id<>'1727746' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='19896' and id > 1727746 and id<>'1727746' order by id asc limit 5