—_____ _____ on the table?

—Yes, they are. [ ]

A. Are, that

B. Is, those

C. Are, they

具有以下化学结构的药物是()

A．达克罗宁

B．盐酸普鲁卡因

C．盐酸丁卡因

D．盐酸利多卡因

E．盐酸氯胺酮