It's me.与It's mine.的区别?

It's me.与It's mine.的区别? it's mine.这里的mine可不可以换成me Is it your book Yes,it is .与 Yes,it's mine.回答的区别? Let me( ) .oh,it's mine. it is me与It's me还有just me的区别 It's mine 后面为什么用mine it's mine 什么意思? Yes,it's mine.It belongs to me belongs为什么要加s --Whose bag is this --_____ .A.It's me B.It's my C.It's mine 王老师,Excuse me .Is this ( yours) (你的) hat?No,it's not mine.(我 It seems that 与It's sure的区别 it's nothing to do with me .其中的it's,是it is还是it has?这俩有区别么?