But, now I am here, this is clearly not true. Milk, for example, is spelt молоко or moloko, but pronounced malako (with the emphasis on the last syllable.) And snow...snow is written снег or SNEG (I know, sweet!) but is actually pronounced SNEK. So, now I know that it is only the syllable which is emphasised in a word, which is pronounced correctly. Well I am also finding out that some letters are always pronounced the same; and that others are 'paired' so that one changes to the other when at the end of a word (as in г/к but also в which becomes ф or F when at the end of a word.).
So that must have made it all a lot clearer!