????????????2??18?? (???????????????????????????? ???????)“??,????????,??”???????????????,???
2??????15?,??????“?????????????”?????,????????
???????10??,?,?????,??????????????,????,?,???????????????
???????????????????????????????????????,????????,???,?????????????,?????“?????????????”?????????????????,??,??????????????????????4??
?????????????,???????????????????,???(??????????)
?????:????????
??:??????????????
??????????????????5?
??:???????????????????
??:???????????????????
??????????????????????
PPI??5????????????
??:????????????????
?????????????????????
?????????????????????
??:???3???1???1????????
???????????:??????????
??????????????????6???
??:????????????????
??:???????????????
???????8?17??????????4??
????????2????????????
??:????????????????
??????????404????(?)
???1????????????????
????15????????????:????
??-????????0-0????????
??3?????????0.2%
??:??????????????????
??-????Indy500??????????
????1???????????????