25.核醫心室功能檢查,其左心室射出分率(ejection fraction, EF)的正常閾值下限通常定在:
(A)60%
(B)50%
(C)40%
(D)30%
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統計: A(448), B(1056), C(340), D(79), E(0) #3065990
統計: A(448), B(1056), C(340), D(79), E(0) #3065990