将取样容积置于腹主动脉瘤细窄的起始部， 可探及到的血流频谱为

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku where sourceid='31780' and id < 2540831 and id<>'2540831' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='31780' and id > 2540831 and id<>'2540831' order by id asc limit 5