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

????:???????????:????vx

??????????????(??):???????,?????,???????????????????????,??????????????,?????????????????

??,?,?????????????????60%?????,???????????????,????????????????

????????,????1800???????????6???????????6?????????????,????????6??

?????,?????????????,????????,?????????????????800?????????????????

????????????????????????????????,?????????????????,??????,??21??????????

6?15?????,??????,?????????,?????????????????????,????????????,??????????74??????????85%???

?????????????(6?????????16???????)???????,?????417??????,?????13?????????,?????????????????,?? ???????:??????????