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

2?????vx

3???????vx

4??????????????

5???????

??2?????10???? (???????????)???10??,?????????????,???“?”????????,???????????21??????????????????????“?????????????????”???????????????????????????67???????,???,??65???

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

????,?????21??????23????????????????,????1.43????????????????????????????,??3.1???????????????????(????????????????),????????????5800???????,?????????????????????????????????,?????,????????

????,???????,????????????????,???11??????????,??????3410??????????????,??????,??,??????????????????,???,????680???

???,????????????21?????????,???????????“?”???????????????,??????????????????

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