????:1??????????:????499

2?????vx

3????????

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

5?????????

???????????6????????18?????(????????? ?)6?????????18???????,????????????????????????????????????“?????????????”?????,????????,??????????????10?????????,??????“???”??????????

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

“???,?????????????,????????????,???????????????30%???40%?”?????????

“???????????????????,????????????18???????????????,????????????,?????????????????”?????????????????,???,??????????????????????,??11.5??10.5?,??????????,??????“?????”,????????????

“???,???????????????????,???????????????????,??????,??????,A??????68%!”???????????,???????????????,???????????????????????

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

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