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
