如图2所示二阶电路为(     )。 

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='68466' and id < 4420845 and id<>'4420845' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='68466' and id > 4420845 and id<>'4420845' order by id asc limit 5