—Jack, would you like to go to the cinema with me this evening?

— ______

—I asked if you would like to go to the cinema with me this evening?

A．Sorry?

B．Excuse me．

C．I’m afraid not．

D．Sorry, I can’t decide yet.

磺胺哑唑+甲氧苄啶，合并用药的目的是

A．提高药物疗效
B．减少不良反应
C．治疗多种疾病
D．延缓细菌耐药
E．减少经济负担