当毛细血管血液的还原血红蛋白超过下列何值,皮肤粘膜可出现发绀:()
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当毛细血管血液的还原血红蛋白超过下列何值,皮肤粘膜可出现发绀:()
A.50g/L
B.60g/L
C.30g/L
D.40g/L
参考答案:
当毛细血管血液的还原血红蛋白超过下列何值,皮肤粘膜可出现发绀:()
A.50g/L
B.60g/L
C.30g/L
D.40g/L
参考答案: