血中还原红蛋白至少达多少时,皮肤黏膜可出现发绀
A.>65g/L
B.>60g/L
C.>55g/L
D.>50g/L
E.>45g/L
血中还原血红蛋白至少达多少时,皮肤粘膜可出现紫绀
A.>70g/L
B.>65g/L
C.>60g/L
D.>55g/L
E.>50g/L
血中还原血红蛋白至少达多少时,皮肤黏膜可出现发绀
A.>709/L
B.>659/L
C.>609/L
D.>559/L
E.>509/L
血中还原血红蛋白至少达多少时,皮肤黏膜可出现发绀()。
A.>65g/L
B.>60g/L
C.>55g/L
D.>50g/L
E.>45g/L
血中还原血红蛋白至少达多少时,皮肤黏膜可出现发绀
A.>50g/L
B.>55g/L
C.>60g/L
D.>70g/L
E.>80g/L