单项选择题
A.一般成人宜用16-18Fr B.小儿宜用6-8Fr C.疑有尿道狭窄者导管宜细 D.女患者看不到尿道口时宜选择粗导管 E.双腔导尿管用于留置导尿
A.46g/L～70g/L B.60g/L～80g/L C.35g/L～55g/L D.28g/L～44g/L E.20g/L～30g/L