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2?????????

3??????????

4???????600??????

5???????

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7????????????,????????????????? ??????? ??????????????????????????????

???????????????????,??????????2????40???241?????8??A????????

???,????????????????1500??????,?2??????16?????538??????????????????????“????????,?????????????????????,?????,???”???????????????,???

?????????????????????????,??????,?????????????500??????????????????1000??

???,???500??;?????1000??;?????????1500?????

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