?? ??????????????:???80%????
????:1???????:????????
2????????
3????????????
4???????????
5???????
??????????12??????????5??????? ??,????«?????????????????»?12??????????5???,??????????????,?«??????????????????»???????????,???????????
???????????????,?????????????????????,????,????????????????80%????????,???????96.6%,??18.9?,??,?????????
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