正常成人腰椎侧隐窝前后径是()。
A.>2mm
B.>3mm
C.>4mm
D.>5mm
E.>6mm
参考答案:B
酚苄明的特点有
A.血管扩张作用持久
B.选择性阻断αl受体
C.主要不良反应是体位性低血压
D.用于外周血管痉挛性疾病的治疗
E.用于心绞痛治疗
A survey done recently show that not all parents _____ their children taking part in the weekend classes. [ ]
A. escape
B. lead to
C. imagine
D. approve of