?? ????????????4???
????:1????????????:????????
2?????vx
3??????????
4?????
5???????
?11???24???????? ????24?????????????????,????????,???4???2???????
???11???????????????23?,?,??????????????,??,????????(??)
?????:????????11???24???????? ????24?????????????????,????????,???4???2???????
???11???????????????23?,?,??????????????,??,????????(??)
?????:???????????:1????????????:????????
2?????vx
3??????????
4?????
5???????
?11???24???????? ????24?????????????????,????????,???4???2???????
???11???????????????23?,?,??????????????,??,????????(??)
?????:???????