单选题
编号：4291886
1.Ⅱ型呼吸衰竭的血气分析特点是
- A.PaO
>60mmHg - B.PaO<50mmHg
- C.PaO
<50mmHg - D.PaO>50mmHg
- E.PaO>50mmHg
>60mmHg<50mmHg<50mmHg>50mmHg>50mmHg