题目内容
胎儿血氧含量最低的血管是（ ）。
2021-10-17
A.静脉导管
B.脐静脉
C.下腔静脉
D.肺动脉
E.主动脉
试卷相关题目
SQL Error: select id,body,options from ***_enewstiku where sourceid='25963' and id < 2177581 and id<>'2177581' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='25963' and id > 2177581 and id<>'2177581' order by id asc limit 5