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

2??????????

3??????????

4??????100???

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

21??,?????????????????,?????,?????????????,?????????????21??????????????

9??????24????????????????????????????28??????????,?21????????,??,???????????????15????????????,???????????????????????????????

???,????10???,?????2.3????????,???????????????????????????????????????????

????8?????,??????????????2441.3???????,????21.8%,????????????????52.6%,????????????

????? ???????

??21?????????????????????????????,???,?,??

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

?????????,???,???,??2100?,????????9?????????,?,????????????????????3.1????????,?6500????,???????????,???2????

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