???????12??4?????????????? (? ????)??????4????????(????????)????????????27???????????(????)??,??(MDT)????????????????????,??

??????????(????????????????????)?????27??????? ????????????????

??????????????????,??????????46????????????????????????????????????????????,???X?:????,???,??,????,???

???????,???????????????,??????MDT????????????????????????????????????????,??,???????????????,???????

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

???:??????????????? “????????????”????

?? ??????????????????????

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

2?????sn????

3?????????

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

5????????

???????12??4?????????????? (? ????)??????4????????(????????)????????????27???????????(????)??,??(MDT)????????????????????,??

??????????(????????????????????)?????27??????? ????????????????

??????????????????,??????????46????????????????????????????????????????????,???X?:????,???,??,????,???

???????,???????????????,??????MDT????????????????????????????????????????,??,???????????????,???????

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

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