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