虚拟电厂对（    ）具有重要作用。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69408' and id < 4493933 and id<>'4493933' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69408' and id > 4493933 and id<>'4493933' order by id asc limit 5