容易引起口渴的水钠代谢紊乱的类型是（）

A.高渗性脱水

B.低渗性脱水

C.等渗性脱水

D.水中毒

E.水肿

We work together to achieve our common purpose: _______ world that is safer, cleaner and healthier than_______ one we are living in.

A．the;/

B．a; /

C．the; the

D．a; the