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

2??????????

3????????

4????????

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

????12???????20???????????????? (????????? ???)???????20??,???12?????????19?24?,?????????????????270??????????,????????????????310??

??,??12??????????????????19??24??????????,?3330????5210?????????,???“???????????????”??5300????,?????100???????????

??????????,?,???????????????????,???????11??,?6.6%,?0.5?????;??3?20%???

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

????,????????????,??????????????35%??????????,???????????9??,10??15.5%,10?4.1%???,?????16%?(??????????) ????????????????:??????