下述药物对厌氧菌感染无效的是（）
A.甲硝唑
B.阿米卡星
C.噻吩甲氧头孢菌素
D.青霉素
E.羧噻吩青霉素
参考答案：B
After discussing, the students some good ideas to work on the project. [ ]
A. put up
B. set up
C. caught up with
D. came up with
______表现数据库的全部逻辑的结构。
A．PDM B．CDMC．OOM D．BPM
