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

2???????

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

4????????

5????????????

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

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

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

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