串联负反馈可使（ ）的输入电阻增加到开环时的（IMF)倍。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30217' and id < 2444228 and id<>'2444228' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30217' and id > 2444228 and id<>'2444228' order by id asc limit 5