27.心臟射出分率（ejection fraction, EF）的計算公式為：
(A)（end-diastolic counts－end-systolic counts）÷ end-diastolic counts
(B)（end-systolic counts－end-diastolic counts）÷ end-diastolic counts
(C)（end-diastolic counts－end-systolic counts）÷ end-systolic counts
(D)（end-systolic counts－end-diastolic counts）÷ end-systolic counts

答案：登入後查看
統計： A(1539), B(183), C(168), D(139), E(0) #1382036