[单选题]
失代偿性呼吸性酸中毒时可出现
A.pH↓，PCO
↑，cHCO
↑
B.pH↓，PCO
↑，cHCO
↓
C.pH↓，PCO
↓，cHCO
↓
D.pH↑，PCO
↓，cHCO
↓
E.pH↑，PCO
↑，cHCO
↓
参考答案与解析：
↑，cHCO
↑↑，cHCO↓↓，cHCO↓↓，cHCO↓↑，cHCO↓↑，cHCO↑↑，cHCO↓↓，cHCO↓↓，cHCO↓↑，cHCO↓