乙类功放电路存在（ ）问题。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='30217' and id < 2444198 and id<>'2444198' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30217' and id > 2444198 and id<>'2444198' order by id asc limit 5