????????????2??????????????5??? (??? ???????????)?2??5????????,??4??????????????????????,??????????2311???????????????????????????????????????

?????????????????1??2???????????????? ??? ??????

???????,?????1995.6?????,???????????5.2%????351.8????,???185.8?????????????????,???1???????????2?????????????49.4??

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????APP??,??,20????????30???26%,?????????????,????,???????????????????????????,????????27.7???

??????????,??,????????????????????????19.5????,???????25.7????????????,??28.2%,?8%???11.8????????????????????,????????????,????????????????????????????IP????????????????????“???????????”?????????????????,???????????????????????????????,??????????????????????????

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???,??????14?????19???????,22????,??????????????????,????“???”,????????????????????????(??)

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