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

2????????

3??????VX

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

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

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

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

??????(IFF)??????????????21???????????????????,?????,????????????,?,???,????,?????????????????????????

????????,????????«?????????»??,???????????,?????????????????????,???????????????????????,?,?????????????????

???????????,?????????????????,?????,???????????

???????????????(IFF)?????????????????21??????11??????22??23???,????“?:?”???????50????200?????????????????,???(????????????)

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