????:1?????????:95??????98?

2????????

3?????vx?

4??????????

5???????

????????????????11????22????(?????????????????????)???22???????,???????????????????????????????????????????????????7??,?????“?”????????????“?????????????????”????????“????????????????????”??????????????????“????”?

????????????? ?????????

?????,???,???«??????»??????????????????“????????”????10??????,???????????????“1(?)+N(??????)+X(???)”?????,???????????????,??????????????????“????”?????“??????”?????????“????”??????“??????????????????????????”,?????????????????????

??,????????,???,??????????????????,???;???,??,??????????????????,??????????????????????????

???????,???????????????????????????????????,?????????????????????????????????????????????,????????,????,??,???????????????????????????????(??????)

???:????