电流负反馈可使（ )的输出电阻增加到开环时的（1+/!(/)倍。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30217' and id < 2444231 and id<>'2444231' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30217' and id > 2444231 and id<>'2444231' order by id asc limit 5