题型:单项选择题 A1型题 局麻药中加入肾上腺素的浓度宜为()A.1:20000~1:40000 B.1:2000~1:4000 C.1:50000~1:200000 D.1:2000000~1:4000000 E.1:200~1:400 查看答案