????:1????????:????Vx

2???95?

3????????

4?????????

5?????????

21???,???????????????????????????????????????????,??????????????,?????????,????????21?????????????????????

9????????????????24?28???????????????????,??????????21????,??,???????????15??????????????,??????????????????????????

??????????????,?10???????,?2.3??????????,????????????????????????????????????????

???????????8????????,??2441.3?????,?????21.8%,?????52.6%,???

????????? ?????

????21????????????????,???,??,???

???,?????????????????,??????????????????????????,?????????????????????????????

????,??????????,????,??????????2100???????????,????9???,????????????,??3.1?,???????????6500?????????????,????????,???2????

????????????:??????????????,???????????????????,?? ????:????