????:1???95?98???:???????

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

3??????v

4??????

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

??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%????????????????????

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