????:1?????????????:??????

2???????

3?????

4?????

5?????

????????8???????12?????? (??? ??)“??????????,??????,?????50???”12?,????????????????

???????????,??23.6?,??118.7%? ? ???

???????????,?????????????????PVC??????????????“???????”?????????????,?????“??????????????”????,?,?????????“???”????????????????

??,??,????????????23.6??????????,??118.7%;???37.65??????????????;?100%?

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

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

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

????,??“??”??????,???????“??”???,??????????????????????????????;???“????????”?????????????????????,?95%?????

??,????????????????D????????????????????,????????????????????????,?????????,???(?)

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