"Η Αυστραλία είναι μία ανεξάρτητη χώρα."

[john_treehugger]

I wish this were true.

[Anas276]

What's the difference between "μία" and "μια", and "Τί" and "Τι"?

[troll1995]

Τί=Τι (the official writing is τι without an accent mark, but it is possible to see it with one). Μία=μια officially (just different pronounciation), but there is a trend of μία=one and μια=a for feminine nouns, of course.