在炎热的夏天某马匹长时间奔跑又无水喝，最易发生的水、电解质代谢紊乱的类型是（）

A.低渗性脱水

B.等渗性脱水

C.高渗性脱水

D.水肿

E.水中毒

句型转换

l.Those are my English books.(改为单数句)  

_______ _________my English_________．

2．We have some salad for lunch.(用let改为祈使句)

 _______ ________ some salad for lunch.    

3．These are basketballs and volleyballs.(对划线部分提问) 

_________ _________these?

4．The video tape is on the dresser.(对划线部分提问)  

________ _________the video tape?

5．Boys like to play soccer after school.(对划线部分提问)    

_______ _______boys like to_______after school?