能产生肠毒素的细菌（）
A.伤寒沙门菌
B.霍乱弧菌
C.A群链球菌
D.产气荚膜梭菌
E.金黄色葡萄球菌
参考答案：A, B, D, E
From the deep valley ______, which had my heart in my mouth.
A．came a frightening sound
B．a frightening sound came there
C．did a frightening sound come
D．a frightening sound did come
丹毒治疗的首选抗生素是（）。
A.红霉素
B.庆大霉素
C.磺胺类
D.氧氟沙星
E.青霉素
