使肝药酶活性增加的药物是（）．
A.氯霉素
B.利福平
C.异烟肼
D.奎尼丁
E.西咪替丁
参考答案：B
—You don't look well, Don! You'd better see your doctor.
—I ________, but he said there was nothing wrong. [ ]
A. will
B. would
C. had
D. have
从运用和功能上分，地铁电话系统可分为那几个子系统？
