当后一次刺激落在前一次收缩的收缩期内会引起（ ）。

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='30913' and id < 2487676 and id<>'2487676' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30913' and id > 2487676 and id<>'2487676' order by id asc limit 5