厌氧菌感染可以选用()
A.亚胺培南
B.氨基糖苷类
C.甲硝唑
D.克林霉素
E.喹诺酮类
参考答案：A, C, D
0.9915的近似值是___________．(精确到0.001)
He had dreamed of going there for a long time. But he _______ he would have such an unpleasant experience.
A．needn’t have expected
B．couldn’t have expected
C．mustn’t have expected
D．shouldn’t have expected
