题目内容
大隐静脉瓣功能不全时,彩色多普勒可见( )
2021-10-14
A.出现反向血流(持续时间>1秒)
B.血流速度减慢
C.血流方向无规律
D.血流速度增快
E.彩色信号反转
试卷相关题目
SQL Error: select id,body,options from ***_enewstiku where sourceid='25744' and id < 2163586 and id<>'2163586' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25744' and id > 2163586 and id<>'2163586' order by id asc limit 5