?? IFF??????????????
????:1????????:?????
2?????wx
3???????vx
4?????VX
5???????
?11?23? (??? ?)???(IFF)???????????21???????23???????????????????????????“???????????????????”?????,??,????,???????????????,???????????
11?????23?????????,?????????????(IFF)?21?????????????“???????”????????????????????????????????(IFF) ??????????????????????????,??????????????????????????5%????????????????????????,?????
IFF????????????,?????5%??????????????????????,?????????????????????????????????,??????????????????,??????????????????????,??????,??????????????
??????(IMF)????????,?????????????,??????????,???????????????????????????
??????????????????,??????????????????????????????,??????????????,??????????(?????????????????)
?????:???????