????:1???98???:????

2??????????

3??????????

4???????????

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

??????,??????????????????,?????????????,????????200???????????,??????????????“???????????”????????“??”,????????

?,???,???,?????????????????,????

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?? ?????:??????????????2000?????????????2200???,12??13??????????????????????????????????15%??20%??

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

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?????????????????,????????“?????????????BA”?????,????,????????????????????15????????,????????????7.8%?

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