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问题 单项选择题

超声诊断肢体动静脉瘘最有力的依据()

A．近心端动脉内径增宽

B．动脉呈现低阻力型血流频谱

C．静脉明显扩张

D．静脉内出现动脉样血流频谱

E．合并出现假性动脉瘤

答案

参考答案：D

选择题

—Could you please tell me what time it is now?

—Sorry, I _______ know. I _______ a watch. [ ]

A. don't, don't have

B. amn't; amn't

C. do; haven't

D. doesn't; doesn't

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多项选择题

胃与十二指肠溃疡病外科治疗指征是

A．急性大出血

B．瘢痕性幽门梗阻

C．急性穿孔

D．胃溃疡恶变

E．内科治疗无效
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