????:1?51?????????:????????

2???????

3??????????

4???????

5???????????

????12?28??(?? ??)28????????????????????,“??????????????????????????2000”????,??

12??28?????????????????,??????,“???????????2000”??????????????

“?2000”????,?136????????????????53???????????????????10?????????????,??8???????????,?????,???????80????

??,?2000???,??????????????????????20?,????

?,??,?????????????????95%,??(????)

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