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

2???????

3???????

4????????

5??????????????

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

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

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

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

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

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

???:??