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

2?????????????

3?????????

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

5???????

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

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

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

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