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

??

????????????2????????9????????,????????????23????????????????,?????????????????????1???????????1??????,????????????????50????????,????49?????,???????45???????????,????????????????????2???????????????10?????????????????

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

?????,??????1????????????,?9???????????????30??????????????????????1??????????????1?????????????????,?1???????????????1???????????,?????????????????????2??????????2?????????3????3,?????????????????????,????,?????????????????

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

??????????,?32????????,??(VAR)?????????????,??????????????????????,???????????????????,????

???????????????????,????????,?????????9???1???,?????????????50?????????,???????????????,?????????,?????????

???????????????????????,????????????,2???????12????????,????????,???????2?????20??????????????????,???????????????,????????????,??????????????

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

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

?????????

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

????????