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

2?????100???

3?????????

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

5????????

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

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

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

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