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?????,???,??????????????????20%?????????1?“?”?,????????

??,?,????????????1???????????2???,?1?????????????,??????????

??????????????,???????????,???????????????0.8-0.9????????

?,8???,???????,??????????25%????????????,???????100??????????????????????????????????????????????????180?-190????????????????,??????600??

?????????????,??10?????????5?????????????(???????)?????????????800?,???10????;800??????????????,?????????????20??????????????,???20????????????30??????????

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????,??????????,????1-3?????????,?300???????????????“????”???

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????????,??????,??1-2??,?????????????,?????????????,??????????????,??????????????11???????,???????,?,??????????,????????????10%-15%???????????????????????11????-12????????????,??

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