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2?????????????

3??????????

4?????????

5??????????

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????8??????????7?????? (?????????? ??????????? ???????????????)7??????????,???,?????????????????????????????????????????????????????????????????,????????????1000??,?????

?,?????600???,???,??????????????????50%?

8??????????7????????????????,??(???)

???,?????“??”??????????????????,??????,??17?????????????????,??991.6???,??6390??

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