阿摩線上測驗
58. Which of the following is the primary cause of the second heart sound (S2)?
(A) the closure of the atrioventricular (AV) valves at the beginning of systole
(B) the opening of the aortic and pulmonary valves during ventricular ejection
(C) the closure of the aortic and pulmonary valves at the beginning of diastole
(D) the rapid filling of the ventricles during early diastole
(E) the closing of the AV valves at the end of diastole
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統計： A(0), B(1), C(17), D(0), E(3) #3421163
統計： A(0), B(1), C(17), D(0), E(3) #3421163
