Old Richard,        ill so long, is losing his memory and needs to be attended to.

A．to be

B．being

C．having been

D．to have been

24小时多尿、少尿、无尿的评判标准是（）

A.>3000mL，<400mL，<17mL

B.>2500mL，<400mL，<100mL

C.>2000mL，<1000mL，<100mL

D.>2500mL，<500mL，无尿

E.>2500mL，<100mL，<50mL