?? ??????????????????
????:1???????:?????
2???????
3?????
4?????vx
5???????
??11???????22?????????? (???? ?)22??????????????????????,?????????????????????????,??
????,????????3.93??(??????????????????????????10%?????????????????????),?????????????????????????????????
???????,???????
????????????“???”???,?,???????,???????????????????????????????,??????????(???) ????????????:???