下列函数中既是偶函数又在 上是增函数的是（    ）

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='16551' and id < 1390219 and id<>'1390219' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='16551' and id > 1390219 and id<>'1390219' order by id asc limit 5