????:1?????vx:?????????

2?????200????

3????????

4???100????

5????????

????????????????????,?????:???3600???????900???????,??????“??????????”????????????1200????????????????……????????,???????????3???????????????????2???????!

??????????????????,?????????,??????????????????,??????“????????????????”????????“??????”??,??????“??????,??????!”???????????

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

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

????“????????”,??,?????

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?,???“??????”??????????????????????????????,???95%,28.2%????????????????????……????????????????????????????????????????????????????,?????????????????????????????????“??”???,????????????????????

???????????“?????”?????,?80%??“????????”????????????,????????????????,????

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