Let's _________ out in the evening.[ ]
A. go not
B. not go
C. not to go
D. not going
答案:B
有一黏液脓血便的患者,经多次培养没有检出志贺菌,则应怀疑下列哪种细菌感染()
A.ETEC
B.EPEC
C.EIEC
D.EHEC
E.EaggEC
开场白是会议开始前几分钟的谈话()
A.1到2
B.2到3
C.3到5
D.2到5