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

2?????????

3????????

4?????vx????

5??????

????????2????6???? (?????? ??)????????6???????????,?????????????4.1%,??,???

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

??,?????????????????,?????????????????????????,?????????????????10%????

???,??,??????????????????????????????????,?????????6.2%????????,??6770???(??,????),??????7.0%;????????5?????????,?????5.9%????????????????????????????95.1???,?????

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