溶血性黄疸的原因是：（）

A.铅中毒

B.异型输血

C.肝炎

D.道结石

E.天性肝细胞内Y蛋白缺乏

In drawing up the plan, they went to the library to _____ many books.      [ ]

A. bring up                    

B. referr to      

C. look for                        

D. try on