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

2????????

3????????

4????????????

5??????

????????11????????29????????? (?? ??)??29??,????1?????????10??????????,???????????????????????287.8???(???????????????,?????????????),???,?????????5.7%?

10????,??,?????????????????,?????????????????????,????????,????????

??????????,1???????????10????????,?????????????,???????5.8%??????????????????,???????????4.1%,???????????,??????????????1??10??,?8.0%,??

1??10??,???11.3????????????????????????,?????????????????????3.8%????,??????????????????????????????????,?50%????,???,????????,??

??,????,???????????????????????????,??,????,?????????????,?????????????(??????????) ???????????????:????????????????