46.心電圖的P波發生於心臟週期的那個階段?
(A)快速充填期(ventricular filling)
(B)等體積收縮期(isovolumetric ventricular contraction)
(C)射血期(ventricular ejection)
(D)等體積舒張期(isovolumetric ventricular relaxation)
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統計: A(1164), B(533), C(238), D(385), E(0) #1943466
統計: A(1164), B(533), C(238), D(385), E(0) #1943466