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????,?????????1979?,????70??????????,?800?????????????????

????,??????“?????????????????”???????????????????????“???”????????????????????“????”??????(???????????“?????”),???????????????“?????????”?????

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?,?????????“?????????”???????,???????????,??,???“?????????????????,????????‘??’,????????????”

????????????“??????????????????”??????????1999???,?????????,????????????????????,?????

??????????????????????????,?????????“??”?????,??????,??????????????????????????????????????????????,“??”,??????????????????????8-10??????4-6??????????????

2004???????,?,2007?????????????????,?????????????????????????????????????,????,??“????”??????????,???????????????????34?????????????????,???

“???????????,?,?5%-10%????,????????????????????????50%-60%?”???????????“???”???????????????????

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1984??????????,????????,?????????????30???,?????????80????2000?????????????????????????????

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