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

2??????

3?????vx

4??????

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

????1???????????????????????17??????????????????????????? (???????? ????)????17??????????????????????????«???»?

?????????????????????????1???????????????????????????????????15???20?????,????1263?????????????????????????“??”????????????“???????????????”????????????????????????

??“????”?,6??????????????,??????????,????????

“????,?20???,??????”?????????????????,???“?????????????????????,???????????????????????????,????????????”????????????????????

?,??????????????,????500???????????????,“??????”????????????????????,??????????????????,?,????;??,?,????????

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

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

??,????????40?,??23%?????????????????,???????????,????2?????????????????,????????????????????1????,???????????????????????1????????????,???????????,?????????????,?????,??????????????????????????????,?????????????????(?????????????) ?????:??