Which of the following is primary function of mechanical ventilation? A: Maintain alveolar ventilation and correct hypoxemia B: Increase carbon dioxide C: Increase blood volume D: Maintain pulmonary blood flow

Which<br/>one is not correct about ventilation/ perfusion ratio? () A: the<br/>normal value is 0.84 in resting state B: its<br/>decreasing means the increasing of physiologic dead space C: its<br/>value reaches to 3 at apex of lung D: its<br/>value decreases at inferior part of lung because there is not<br/>sufficient gas exchange there E: when<br/>it undergoes embolism in pulmonary artery, its value decreases

单选题<br/>Which<br/>of the following statements is the most consistent with the<br/>definition of heart failure? () A: Stroke volume is decreased B: The volume of venous return is greater than that of cardiac output C: Cardiac output cannot meet body’s requirement for metabolism D: Heart dysfunction results in congestion in pulmonary and systemic<br/>circulation

Which<br/>has the biggest effect on diastolic arterial pressure ? ( ) A: stroke<br/>volume B: peripheral<br/>resistance C: large<br/>artery elasticity D: cardiac<br/>pump function E: vascular<br/>filling

货舱内所能容纳件杂货的最大体积称为( )。 A: 货舱散装容积(Grain<br/>capacity) B: 货舱包装容积(Bale<br/>capacity) C: 液货舱容积(Liquid<br/>capacity) D: 液舱容积(Tank<br/>capacity)