????:1???????????:??????

2??????

3?????????

4?????vx

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????12?19?? (??????????? ??????????)??19??,??????????11???,???????????182.1??,???????,?????????132.6????????49.5???????????????,????3??????

???11??,?????,????161.1??,????88.5%;???????13.5??????????,???????????231.4%,??7.4%;??7?????,???3.9%?

??????,?????????,??29.7?????????27.7????????22.2??????????,??16.3%?15.2%?12.2%?

???????????,?,?????????,???????11??,??141.9???????????,?????????????5.1%,???????????

?????????????,???????????????11??,??30.4??,??28.5%,??22.9%????????????15.8??,?????????20.8%,?11.9%???,???????????????????19.3%,?????????????5.9%?(??) ????????????:??????