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