ok,these are my SA2 results:

math:80%
science combine:54%
higher chinese:89%
English:51%
English literature:74%
history:68%
Art:54%
chinese culture:92%
DnT:74.5%
average:70.5%(if i'm not wrong)

i'm quite satisfy with my results..
and this is not a kind of showing off,but encouragement for me to strive to a higher level.