当毛细血管血液的还原血红蛋白超过下列哪项数值时，皮肤黏膜即可出现发绀A．100g／LB．80g／LC．60g／LD

当毛细血管血液的还原血红蛋白超过下列哪项时，皮肤黏膜即可出现发绀

A．100g/L

B．80g/L

C．60g/L

D．50g/L

E．40g/L

A.100g/L

B.50g/L

C.75g/L

D.55g/L

A.50g/L

B.80g/L

C.60g/L

D.100g/L

E.40g/L

A.100g/L

B.80g/L

C.60g/L

D.50g/L

E.60g/LD.50g/L

A．100g/L

B．50g/L

C．75g/L

D．55g/L

E．45g/L

A.50g/L

B.60g/L

C.30g/L

D.40g/L

A.30g/L

B.40g/L

C.50g/L

D.60g/L