????:1?????????881?:????

2?????????

3???????????

4?????????,??????

5????????

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

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

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

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