_____ people know _____ about it.[      ]

A. Only a little, more    

B. Very few, /    

C. Very little, /    

D. Very a few, more

下列属于磺胺类药物的是（）

A.恩诺沙星

B.氟苯尼考

C.磺胺嘧啶

D.庆大霉素