单项选择题
A.0.25mg/2mlB.2.5mg/2mlC.2.5g/2mlD.0.25g/2ml
A.5mg/2mlB.0.5mg/2mlC.5mg/1mlD.0.5mg/1ml
A.1mg/1mlB.2mg/1mlC.1mg/2mlD.2mg/2ml
A.20mg/2mlB.10mg/2mlC.20mg/1mlD.10mg/1ml
A.0.4mg/1mlB.4mg/1mlC.4mg/2mlD.0.4mg/2ml
A.10mg/2mlB.10mg/1mlC.0.1mg/1mlD.0.1mg/2ml
A.0.5/5mlB.1mg/5mlC.10mg/1mlD.0.1g/5ml
A.0.3mg/1mlB.0.3g/1mlC.0.375g/1.5mlD.0.375mg/1.5ml
A.2mg/1mlB.3mg/1mlC.3mg/2mlD.2mg/2ml
A.1mg/2mlB.1mg/mlC.0.5mg/1mlD.0.5mg/2ml