引起侵袭性肠炎的主要细菌有（）
A.侵袭性大肠埃希菌
B.空肠弯曲菌
C.耶尔森菌
D.出血性大肠埃希菌
E.沙门菌属
参考答案：A, B, C, E
The flowers were so lovely that they in no time.[ ]
A. sold
B. had been sold
C. were sold
D. would sell
表面麻醉可使用的部位为（）
A.鼻
B.眼
C.气管
D.直肠
E.皮肤
