兴奋性突触后电位产生时，突触后膜局部的变化为

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30239' and id < 2446313 and id<>'2446313' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30239' and id > 2446313 and id<>'2446313' order by id asc limit 5