??????????????5???

????:???????????:???????vx

?????2????????????????????14???? (???????????? ??)????????????14?????,??????????????2?????8?,?50?????????????13?????,?5.3??????,???????????????????75%?

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?,??770???????????????,???1??????????????10?????1????????22.5???6????,????????????????????????????,?????

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

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????????,????????????????????3???,?7500??,??????????95%?????????????,??

???????????,??96.8%,?????????2.2%,???1%,??

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