He spoke so _____ that nobody could understand him. [ ]

A. slowly

B. clearly

C. quickly

D. loudly

格林巴利综合征的发病可能与下列哪种菌的感染有关（）

A.幽门螺杆菌

B.空肠弯曲菌

C.大肠埃希菌

D.小肠结肠炎耶尔森菌

E.副溶血弧菌