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

2?????????

3???sn??

4?????95?

5???????

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

?????,??3.1??,????????????????????14.7???????????????????????,??“??????????”????????????????????????,??????????????6?????,????????11?,??2????????,????????????,?????????????,????????

?????????????????????????????,??????????,???????????????????????????????????????????????????,????????110????????????,??????4.54???,????15.1%,??1???????????,???????????????,???????1100?????????????????????????,????????1300?????????,????????????990?????

????????????:???????????????????