胎儿哪种血管内的血液含氧量最高:A.静脉导管 B.脐动脉 C.下腔静脉 D.肺静脉 发布时间:2018-07-02 23:51 │ 来源:www.tikuol.com 题型:单项选择题 问题: 胎儿哪种血管内的血液含氧量最高:A.静脉导管B.脐动脉C.下腔静脉D.肺静脉E.主动脉
题型:单项选择题 The little girl asked her mother to buy her a nice pair of _________,so the mother went to some_________stores.A.shoes;shoesB.shoes;shoeC.shoe;shoesD.shoe;shoe 查看答案