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

2??????????

3?????????

4?????????

5???qq

????????8???????????????31?? (??????????????????? ?????????????????)??????????????????????8??31????,8???50.3%,???????20??????????50%????????,??????

?????,???,???????0.6?0.1??????;????????????????????????????????????????????????,?????0.3?????2????????????????????

??????????????,8?,???????????????50.3%,????20?????50%??,?????50%??????,??????????????????

?????????????????,????8?????????????,?????????????50.2%,??????0.2??????????????,????????????????,????,???????

???????????????,?????????????????,???????????55%??;???????????????,????????????,???????????????60%???

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