what day is it?和when is it ?用法有什么不同?

what day is it?和when is it ?用法有什么不同? what a fine day it is.和what fine weather it is 有什么不同 What day is it today?和What day is today?的意思有什么不同? What day is it?和What day is it today 有什么区别 what用法What did you say和what say did you 有什么区别?What day is it 在感叹句中,How 和What的用法有什么不同 例：---wonderful music it is.为什么用what而 what is it?和what it is?有什么区别 what it is?和 what is it?有什么区别? What day is it 关于what it is和what is it的用法 what it is 和how it is有什么区别 英语 What the date tady?和what day is it today?有什么区别?