单室模型血管外给药，首剂量与维持量的关系式为（）.
A.A
B.B
C.C
D.D
E.E
参考答案：B
近年有人提出一种肿瘤易发性格模型指的是哪种性格模型（）
A.A型性格
B.B型性格
C.C型性格
D.E型性格
E.D型性格
The calculations, had they been done by hand, all practical value by the time they were finished. [ ]
A. had lost
B. would lose
C. should have lost
D. would have lost
