现场急救火焰烧伤时哪些措施错误（）

A.尽快卧地翻滚灭火

B.边跑呼救求救

C.尽快泼水灭火

D.用湿被、毡子等隔绝空气灭火

E.就近跳入水沟

________ is known to us all is that Antarctica is the coldest place on Earth.

A．It

B．As

C．What

D．That