On the bus I saw a student____ I thought was your brother.

A．who

B．whom

C．which

D．/

酮症酸中毒可表现为（）

A.电解质平衡紊乱

B.乎气中有烂苹果味

C.失水

D.周围循环衰竭

E.中枢神经功能障碍