单项选择题

患者男，48岁，作下肢静脉瓣膜功能试验，先平卧，抬高患肢，待曲张静脉淤血排空后，在大腿根部扎止血带，患者站立后松开止血带，曲张静脉由上而下迅速充盈，说明何处瓣膜功能不全

A.小隐静脉
B.深静脉
C.交通支
D.浅静脉
E.大隐静脉
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听力原文：W: It looks like I'm going to be a little late for class. I hope ProF.Clark doesn't start on time today.M: Are you kidding? You can set your watch by the start of his class.Q: What can be inferred about ProF.Clark?(16)A.He rarely noticed when students are latE.B.He is usually punctual.C.He advised his students to wear watches to class.D.He has been unpredictablE.
A.M:
B.
Q:
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单项选择题
患者男性，67岁。突发持续性胸骨后疼痛6小时，含服硝酸甘油无效。心电图示急性前壁心肌梗死，室性期前收缩8次 分，呈二联律。除立即止痛外应迅速给予
A.普罗帕酮静脉给药
B.普鲁卡因胺口服
C.美西律口服
D.维拉帕米口服
E.利多卡因静脉给药
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