锥体外系统病变时会出现（）
A.假面具脸
B.折刀样肌张力增高
C.静止性震颤
D.慌张步态
E.运动减少而缓慢
参考答案：A, C, D, E
I can hardly hear the radio. Would you please _________
A．turn it on
B．turn it down
C．turn it up
D．turn it off
硬膜外阻滞完善的时间需（）
A.3～5min
B.8～10min
C.12～20min
D.25～30min
E.40min以上
