有关血液PCO2的测定，以下叙述哪些是正确的（　）

A:测定PCO2有平衡法和直接法两种方法 B:平衡法的原理是通过测定pH来求PCO2 C:直接法是用PCO2电极来测定PCO D:PCO2电极是一个由稀释的碳酸氢溶液所包绕的pH玻璃电极 E:只要操作准确，两种方法所测得的PCO2值基本一致

How are pulmonary ventilation Influenced by the changes in blood PO2 ,PCO2 , and pH (10 Points)

How are pulmonary ventilation Influenced by the changes in blood PO2 ,PCO2 , and pH (10 Points)

How are pulmonary ventilation Influenced by the changes in blood PO2 ,PCO2 , and pH (10 Points)

How are pulmonary ventilation Influenced by the changes in blood PO2 ,PCO2 , and pH (10 Points)

How are pulmonary ventilation Influenced by the changes in blood PO2 ,PCO2 , and pH (10 Points)