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????:1???????????:??????????
2???????
3?????????????
4??????????
5????????
12???24???,????????,????????5240??
??????????,????????????????1900????????,??177??,?4800??5300???????????32????,????????20??????,???10??
????????,????1.58????,?????????????????????????5.2???????????,?????4.74???,??12.4?????
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