并联负反馈可使（ )的输人电阻减小到开环时的1/( 1 +#)。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30217' and id < 2444229 and id<>'2444229' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30217' and id > 2444229 and id<>'2444229' order by id asc limit 5