?? ?????7??????????????
????:1????????????:?????
2???????????
3???????
4?????????
5???50????????
?????11????22???(??)????22?????????????,???????????????????????????????????????????????????????7?????????????????,????????????????“??”???????????????????“????”????“???????????????????”???“???????????????????”?
???????? ????????????????????????????,?,??????«????»??????????????????????????????“????????????????????”??????10????,?????????????????????“1(????)+N(???????????)+X(????)”????????????,????,???“???”??????“?????????”?????????????????“????”?????“????????”,???????????????????????????
?,???,????,??,???????????????;????????,??,?????????????????????????????????????????????????,??????????????????????????
?????,?????????????????????????,???????????,???,???,??,??????????????????????????(????)
?????????:????????