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

2?????????

3?????????

4???????vx

5??????????

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

15?2.2??

?????????15???,?????,???????,15???2.2??????,?????14%?

????????,15???33003400??????,??????2??????,??????????

??????????????,15??1680?????????????,???14?????????????????????

???????,??15??189???????

?????

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

?????????????????????“??”?????

?????????:

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

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

??????????????,???????????,9?15????????

??“??”?????????

???,??“??????”???????????

??????????????,????????????????????????????????15%,?????????????????????????????????30%? ???????:???????