???:??????
??3?????????0.2%
2017???????????:??????
????15????????????:????
??!?????????????????
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PPI??5????????????
?????????????????????
??????????????????5?
?!????????????
?????????????????????
???1????????????????
??-????????????????????
???100?????????????0.01?
??:??????????????????
???7??????????????????
???100?????????????0.01?
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????????2????????????
????1?????????????????
19???????????????????
????1???????????????
??????????????00????2??
??????Indy500????F1????
????1?????????????????
??:?????????????