— Going to work today, Brenda?

— No. It's my day _____ today. [ ]

A. out

B. in

C. away

D. off

以肝脏代谢为主的强心苷药物是（）

A.毒毛花苷K

B.洋地黄毒苷

C.地高辛

D.红霉素

E.奎尼丁