????:1???????????:??????vx

2??????????

3?????????

4??????????

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

????7????????????????18?(????? ?????????????)7??16??17????,“??”????????????,??????????????????????,?????????????????????,????????????

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

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

??????,????????,???????????????????????????,?????????????????????,???1000??????????1800???????????????????????,???????????2800??????

?,??“????????????????????????”????????????,????“???????????”??,???????????,????????????????“????????????????????????”???????????????????,?????,???,???(??)

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