某药按一级动力学消除 其血浆半衰期与k（消除速率常数）的关系为A. t1/2=0.693/kB.

某药按一级动力学消除，其血浆半衰期与k（消除速率常数）的关系为

A. t1/2=0.693/k

B. t1/2=k/0. 693

C. t1/2=2. 303/k

D. t1/2=k/2. 303

E. t1/2=k/2血浆药物浓度