?? ??????????????????
????:1?????????:??????
2??????????????
3?????vx
4?????
5??????
???11?????????????????????25????????? (?????????????? ???)??25???,?,????????????,?????????????????????????????????,??????3???????
???,?,??????????,???????????,????????????????“???????????”???????????????????????????,??????????????,???????
?,????????????????????;????????
???????????????????????????,????????????????,??1424?,?????22.43????????(???????????????) ??????????:?????????????