振荡中心的特点有（   ）。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69377' and id < 4491417 and id<>'4491417' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69377' and id > 4491417 and id<>'4491417' order by id asc limit 5