单项选择题
A.洗刷干净B.尾部血管扩张C.便于观察D.便于操作E.血管收缩
A.0.2mlB.0.3mlC.0.1mlD.0.15mlE.0.5ml
A.0.5~0.8ml/10gB.0.1~0.2ml/10kgC.0.1~0.3ml/10gD.1~2ml/100gE.0.3~0.5ml/10g