20.下列何者負責起始心臟跳動?
(A)房室結(atrioventricular node)
(B)竇房結(sinoatrial node)
(C)房室束(atrioventricular bundle)
(D)心內膜下傳導網絡(subendocardial conducting network)
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統計: A(22), B(272), C(1), D(3), E(0) #3133307
統計: A(22), B(272), C(1), D(3), E(0) #3133307