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【单选题】
冠心病心绞痛的心电图表现哪项不正确A.
非特异性ST—T改变
B.
心电图半数以上正常
C.
发作时原倒置T波可以直立
D.
心电图ST—T动态变化是诊断冠心病的主要依据之一
E.
心绞痛发作时心电图可以出现Q波
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