题目内容

男性 30 岁。 反复阵发性心动过速史10余年,每次心动过速突然发作,持续数十分钟至数小时 此次心动过速发作1小时而来医院就诊.格检查血压 100/70mmHg心脏无扩大,心率 200 次/分,节律规则。若该患者发作时间持续较长,最简单、有效的措施为( )

A. 西地兰静注
B. 普萘洛尔静注
C. 维拉帕米静注
D. 刺激迷走神经
E. 恬尔心静注

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Which symbol is not on our national emblem?

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A. September 1949
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Who established the Tang dynasty?

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The Grand Canal between Beijing and Hangzhou was firstly constructed in Spring and Autumn period in ancient China for the purpose of military action.

A. 对
B. 错

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