单项选择题

A.0.1~0.3ml/kg静脉或0.5~1ml/kg气管内
B.0.5~1ml/kg静脉或0.1~0.3ml/kg气管内
C.0.1~0.3ml/kg静脉或1.0~3.0ml/kg气管内
D.静脉和气管内均为0.1~0.3ml/kg