- Is there any poems written by Li Bo in the book you bought yesterday?  

- I remember there is __________ in it.[ ]

A. one      

B. it      

C. that      

D. the one

两种药物配伍能产生剧烈的毒性反应或副作用，这种配伍关系属于（）。

A.相须

B.相使

C.相反

D.相杀

E.相恶