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【单选题】
男,79岁,胸痛持续9小时,诊断为急性前间壁心肌梗死。病理性Q波等心电图特征性改变见于哪一组导联( )A.
V 1 、V 2 、V 3
B.
V 3 、V 4 、V 5
C.
I、avL
D.
V 1 -V 5
E.
II、III、aVF
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