When I was in London,at first I had no idea where I could       my RMB for pounds. [ ]

A.charge

B.exchange

C.change

D.chance

慢性肾衰竭肾功能不全期不会出现

A．内生肌酐清除率降至正常值的20%～25%
B．多尿
C．夜尿
D．轻度氮质血症