对于多电压级网络，都需将参数或变量归算至同一电压级——基本级。通常取网络中(  )为基本级。

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69510' and id < 4503161 and id<>'4503161' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69510' and id > 4503161 and id<>'4503161' order by id asc limit 5