缺氧对机体的影响，下列哪项是错误的（）。

A.心率加快，心排血量增加

B.可引起头痛

C.可引起酸中毒

D.可导致细胞内水肿

E.外周动脉舒张、静脉收缩

Rose is too young to go to school. [ ]

A. old enough to go to school

B. too short to go home

C. so young that she can't go to school

D. a school girl