肾小球源性血尿()
非肾小球源性血尿()
急性肾衰竭()

A．尿红细胞形态正常

B．尿中可见白细胞管型

C．尿红细胞形态异常

D．尿中多见红细胞管型

E．尿中可见粗大上皮细胞管型

John has two brothers, but either ____ out of work now. [ ]

A. are

B. is

C. has

D. have