?? ??????????????????????500???
????:1???????????:??????????
2????????????
3????????????
4?????????
5????400???????
????????12?????8???????? (? ???)8???,??????????,????????????????7?,????????,??500.71??,????54.75%,??????????????????????67.01??????????????
??????? ?????,????445.66????????????????????,????????????????????????????????????????????????55.05???
??,??????????????,?????????57????????????,??????????????????????????875?????,???????????1200??????????????????
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