超声成像过程中，什么样脉冲长度对高分 辨力而言是最重要的

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='31793' and id < 2541739 and id<>'2541739' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='31793' and id > 2541739 and id<>'2541739' order by id asc limit 5