药物达到一定效应时所需的剂量称为
A．生物利用度B．效价强度C．后遗效应D．效能E．首过消除
参考答案：B
Jack is good ______ all subjects. I look on him ______ my model. [ ]
A. on; for
B. at; to
C. at; as
D. for; as
细菌性痢疾有（）。
A.大便隐血试验持续阳性
B.柏油样黑便
C.排便后滴鲜血，血在粪便表面
D.白陶土样便
E.脓血黏液便
