?? ??????????????6?12?
????:1?????????:????????
2???????vx
3??????????
4??????????
5???????
??:?27??,?????,?????6??????12???
????????????????????????????:????:?27??,?????,?????6??????12???
????????????????????????????:??????:1?????????:????????
2???????vx
3??????????
4??????????
5???????
??:?27??,?????,?????6??????12???
????????????????????????????:??