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

2???????

3??????????

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

5???????

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

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

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

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