题目: 在第一代头孢菌素中肌注后血药浓度最高的是()A.头孢唑啉B.头孢呋辛C.头孢他啶D.头孢哌酮E.头孢噻肟 答案: 参考答案:A解析:头孢唑林属于一代头孢,头孢呋辛属于二代头孢,头孢他啶、头孢哌酮属于三代头孢,头孢噻肟属于四代头孢。一代头孢主要用于耐药金葡菌感染,二代头孢对革兰阴性细菌如大肠杆菌有效,头孢他啶为目前抗铜绿假单孢菌最强者。
题型:选择题 — In Western countries, women don't want others to know their ages. — Right. So it is _____ to ask a woman her age in Western countries. [ ]A. rude B. formal C. polite D. usual 查看答案