近年来发现对痢疾杆菌较敏感的抗菌药物为（）
A.卡那霉素
B.庆大霉素
C.SMZ
D.氟喹诺酮类
E.氨苄青霉素
参考答案：D
In the last ten years, they _______ three great scientific experiments.
A．finished
B．have finished
C．had finished
D．have been finished
MBH分析方法
