周围血中还原血红蛋白浓度为多少时出现发绀()
A.>20g/L
B.>30g/L
C.>50g/L
D.>70g/L
E.>100g/L
参考答案:C
下列各项,不属于独活寄生汤功用的是()
A.祛风湿
B.补气血
C.益肝肾
D.益心脾
E.止痹痛
Never keep ________with dishonest persons.
A.company
B.track
C.touch
D.pace