可兴奋细胞在接受一次阈上刺激后兴奋性的周期变化为

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='28371' and id < 2320044 and id<>'2320044' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='28371' and id > 2320044 and id<>'2320044' order by id asc limit 5