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????9??????????????????20??? (? ????)“?,‘80???’‘90??????????’??????????80%?”?????????????20??,???IP,??,“??”?????????

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??,?????????1??8?????????????????????,????1.16??????,?903.8????,???????14.2%?16.1%,?????15.7%?

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??????,?“????????????????????????”?????,??????“?????????”“????”??????IP?????;????,???????????????????????????????????????????“??”??????????,?????????????;???????2000????,?“??”?????????“?”?

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