9???????????????

????:?????????:??400????

????????????9?????????????????30??? (????? ?????????????????????)??????????????30???????????,9??50%,??????????????0.3?????,??????????????????

??,??????;????????????????????????????????

??????????,9???,?50%,??????????????????????????,??????????????????9????????????????,??????????50.7%,?0.1??,????

9?????????,???????????????3??????,??????????????;???????3???????????,??60%????,????????,????????????????????????,??????,???????????????????,?????????????????????

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