供应小脑的动脉中错误的是()
A.小脑下后动脉
B.小脑下中动脉
C.小脑下前动脉
D.小脑上动脉
E.基底动脉
参考答案:B
—Where is Bill?
—He ________ Sydney with his father. [ ]
A. has gone to
B. has been to
C. have gone to
D. have been to
为预防腰麻的血压下降,最好先肌内注射
A.麻黄碱B.以上均不适宜C.异丙肾上腺素D.肾上腺素E.去甲肾上腺素