?? ?????????? ???????????????
????:1???????:?????????
2?????????
3???????????
4???????????
5?????vx
???????11???????25?? ?(ABC)???????????,?????????????????????????????????????11???24????,?,??????????????????????????
??:??????????????(ABC)????????????????????????,????????????????,????
????,???????????,???????????,???
???,????24??????,???????
???,???????????,?????????????????????????“???????????????????????????,???”
????????????????:?????