超声检查时，正常肝、肾实质是“均匀回 声”的主要原因是

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='31794' and id < 2541774 and id<>'2541774' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='31794' and id > 2541774 and id<>'2541774' order by id asc limit 5