??????

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???????90%,????????????

?? : 2019-09-30 16:38 ?? : 21?????? ?? : ???

?8???,????????????,?????(????)??????100-200?,?9?????????90%,??????????????????????

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

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"?(???)????,??????????,?????????????,???????????,?????????????????????,?????????????50%-80%,"??????????????????????????????????????????

"???????????????????,???????????????,?????10%-15%????7???8??,???????????????,????????????????,???????????,"???????

?????,??????????????,"???????????,????????????????,?????????????????10%?"

??,???????,????????????????????????,??????????????Statista?????,2018?,?????????6.46???,?????3370 ???,??5??????????6.1%?2.4%?

???,???????????????,????????,"???????????????,??????????100-200???????,???????????????????????,??????30%?????????,??????20%?????????????"

???2008?2???????????????????????,??????????????????,???????????????????????,2019?????????????????84%??????????????22.5%??,??????????64%?

?????,?????????????????????,"????????????????,??80%??????????????????????,??????????,?????????,???????????"

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?????90%

"?8???,????????????,?????(????)??????100-200?,?9?????????90%,?????,?????????????????????,"???????????????????????

??????????1978?,??????,?????????????????????????????,???????????????????????????????????????1700???????

???????8?30????????,7????????519.7???,????4.8%?????????????5.5%,?416.1???,???8???????????????30%?

????????,??????????????????????,??????????????????20??,"?????????????????????,????????????100???"

???,?????????????,??????????,"???????????,????????,???????,??????????????????,??????,?????????????"

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?????,????????????,???????,"??????????,????????????,??????????????????????????????????????,???????????????,?????????????????????????,?????????????????????????????,??????????SARS?????????????????"

??,????????,?????????????????,"??8???????????,???????????"????

"?????????????(??),????????????????????,??????????????????,???????????,??????????????????,?????? '??',"????

????,?????????????????????????????????????????266???1?2?????????,??41%??????????????????,?????30%?

??,?????:"?????????????????????,???????,?????????????????????????

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