????:1?????????:??????

2???????

3?????????

4????????

5?????

???2???????????????21???????????????? ???????????????????????21??,20??,?,??????12????????????????????????????,19???????

????????????????,20???11???????????????????,?17?????????(Unifran)???????,???????????????,?;???????????????,?,??,???????????

??G1??,?????????

??,????????21???,????????19??????3???,???????(??????????) ??????:????