将麻醉药物注入椎管内的某一间腔隙，使脊神经根的传导功能发生可逆性阻滞的麻醉方法，称为（ ）

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='28448' and id < 2323793 and id<>'2323793' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='28448' and id > 2323793 and id<>'2323793' order by id asc limit 5