与慢性胃窦胃炎下列有关的细菌感染是:()
A.大肠杆菌
B.链球菌
C.幽门螺杆菌
D.厌氧杆菌
E.嗜盐杆菌
参考答案:C
______ we'll go to the Huaguo Hill. [ ]
A. I have been told
B. I've told
C. I'm told
D. I told
对精密仪器室的环境条件有什么要求?