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题目类型:[单选]
[单选] 在心电图心室除极波标准中,哪项是不正常的( )
A
R波振幅在Ⅰ导联<15mV
B
R波振幅在aVL导联<12mV
C
R波振幅在aVR导联<05mV
D
R波振幅在aVF导联<20mV
E
R波振幅在V1导联<05mV
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