下列哪种局麻药收缩血管的作用最强()
A.普鲁卡因
B.可卡因
C.氯普鲁卡因
D.地布卡因
E.丁卡因
参考答案:B
一Did Tom enjoy seeing his old friends yesterday?
—Yes,he did.He _____ his old friends for ages.
A.didn’t see
B.wouldn’t see
C.hasn’t seen
D.hadn’t seen
右室室壁激动和左室室壁激动时间分别为()
A.0.01~0.02秒,0.02~0.05秒
B.0.01~0.02秒,0.02~0.05秒
C.0.01~0.04秒,0.02~0.06秒
D.0.01~0.05秒,0.02~0.04秒
E.0.01~O.15秒,0.02~0.04秒