????:1???????????:????????

2????????

3??????

4?????300??500??

5??????????

??????10?12?????? (?????? ??????????????????)????????????????12?????????,????????????,??1428?????????,?????????????,????????????

??,????????????????2.39??????,?????????????1.56???,??56.1%???????,??????????????

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?????????????????????125???????????(????????)??????????,???????2.391??,????????????????????????99.87%;??0.13%??????????,???????????????,????????????,?????????????????????“???”?

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