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

2???????

3???92?95?98?

4??????????

5??????????

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

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

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

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

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

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

????:??????