???1.7??????????? ????????2.6??

????:???????:??????

?,????????1.7??????????,???6.3??????????????1?????10?,??????????????????????????????2.6???????

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????? ????:“????”?????????“?????????????”?????????,??

??,????????????????“?????”???????,????????1000?????????????????????,????,??????????????“???????????????????????????????????”?,???

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???? ???????????:??????28.6????,?????????????????????700??????????,??8500??,??????12???????????????????(??) ?????????:???