【名词&注释】
血流量(blood flow)、心电图(electrocardiogram)、肺心病(pulmonary heart disease)、肾功能(renal function)、分泌物(secretion)、肺循环阻力(pulmonary vascular resistance)、体循环(systemic circulation)
[单选题]和体循环(systemic circulation)相比,肺循环阻力(pulmonary vascular resistance)()
A. A.大于体循环(systemic circulation)
B. B.小于体循环(systemic circulation)
C. C.不易受重力影响
D. D.易受重力影响
E. E.血流量大于体循环(systemic circulation)