?? ??????????????????????
????:1?????????????:???????
2???????????
3??????????
4?????v?
5???????200??vx????
?????11?23???????? (?????? ???)??????23????????????????????????(IFF)?21?????,????????,??????,???????????????????????????????????
11???23??????,????(IFF)?21????????????????????? ?????? ??????????????(IFF)???????????????21????????????,?????????????????,????????????????????????????,??,??????????,????,???????????????
?????????????????,????????????????«????????????????????????????»?????????,??,????????????,???????,???????????,???????????????????????????
??,????????????,?????????????????,????????????????????
????????????????????????(IFF)??21??????????11?????????22????????23?????????????????,??????????????“??:???????????????”????????????50????????200??????????,??????????????????????(?)
??:????????????