血浆药物峰谷浓度差指的是
A. 本次剂量所预期的高峰血浓度与本次剂量的谷浓度之差
B. 预期的峰浓度与预期的谷浓度之差
C. 首次预期峰浓度与下次谷浓度之差
D. 末次峰浓度与谷浓度之差
E. 服药后最高浓度与本次服药前药物血浓度之差
We will have to cancel the conference______ more people sign up to attend.
A. if
B. either
C. unless
D. because
Various regulations, such as import controls and tariffs, ______ free trade between the two countries.
A. restrict
B. accommodate
C. gratify
D. endure
患者,女性,59岁,因铜绿假单胞菌感染而用头孢他定进行治疗,为提高头孢他定的血药浓度可同时用
A. 氨磷汀
B. 右雷佐生
C. 酮康唑
D. 苯妥英
E. 丙磺舒