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

2??????????

3?????????

4???????

5????????

??11???????????30????? (????????????????? ????????)?????30???,11???????????????50%,?0.2??,????6??50%??????????????,???????????????????????

????,??,??0.3?????????????????????0.9??????;???????????????;???????????????????????????????????

???????????????,11?,?????50%,????????????,?????????????,???????????????????60%???????,??????????;????52%??????????????,?????;???????????????55%????????,???????????????????????,??????????????????????????

??,?????,????????????????,??,???????????,???????11????????????????,???,???(????????????????) ?????:????????????????