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

2?????????

3??????????

4???????????

5??????????

??????11?????????????23?????????? (???? ?????????????????)??????(IFF)???21?23????????????“?????????????”?????,???,????????,????,?????????????

11??????????23???????????????????????,???????????????????(IFF)??????????????????21??????????????????“???????”??????????????????????(IFF) ??????????????????????

????????????????????????????????????,??5%???????????????????????,????????????????????????

IFF???????,???????????????5%??????????????,?????????????????????????,??????????,???,????????????????,??

??(IMF)????????????????????????,?????,????,??????????????????????

??????,???????????,????????????????????????????,??????(??)

???????????????????????:??