--Peter is very clever and he studies hard as well．

---No ______be always wins first in the examinations.

A．doubt

B．question

C．wonder

D．problem

患者头晕、乏力、恶心呕吐、血清Na⁺130mmol/L、血清K⁺4.5mmol/L、尿相对密度1.010，电解质紊乱的类型是（）

A.高渗性脱水

B.等渗性脱水

C.低渗性脱水

D.低钾血症

E.高钾血症