??????????????????

????:?????????:???????400?4???

6???????????30?????????????,????200?????????????????????????

???????????42???21???????????,??????????????185?????????????????????,???????????110??????????????????????100??????,???????100%?????????????????????????????????,?????????????????

??????????????????????????? ????????????:??,?????????20???????????,????????????85%?????????????,?????????????60?????1500???????????????????????,????

?????,??300???????????,??????????10???,??????????????????????,???????1.2??,??????????1.3??????????,???????

???? ????????????????:???????????????????????????,???,??????????,?????????????,????????????????,????????????????,???????

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