胸导管常注入()
A.右静脉角
B.左静脉角
C.上腔静脉
D.头臂静脉
E.左颈内静脉
参考答案:B
影响测量信度和效度的主要因素有哪些?
I'm leaving early tomorrow morning because it takes _____a lot of time to get there by bike.[ ]
A.me
B.I
C.my
D.mine