???????????????11???22?????????? ????22?????????????????????????????,??????????????????????????,??????????????

???????????????,????,??????????29????,??????????????????????????????15????,?????

????????,???????????,???,???????,??????????????,??818.6????????????????????????,?????????????48.8%;????????,??488.5?????????????????????,???78.6%?

“????????,??????????????????,?????,??????”?? ????:?????? ??“??????????”????

?? ????:???818.6???????????,???48.8%

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

2?????vx

3????????

4????

5??????

???????????????11???22?????????? ????22?????????????????????????????,??????????????????????????,??????????????

???????????????,????,??????????29????,??????????????????????????????15????,?????

????????,???????????,???,???????,??????????????,??818.6????????????????????????,?????????????48.8%;????????,??488.5?????????????????????,???78.6%?

“????????,??????????????????,?????,??????”?? ????:??????