????:1??????????:????

2?????????????

3????????vx

4????????????

5???????

???????????????????????11????????????26???(??????????????????? ????? ??????????)???????????????????????????,??,??????,????,?????,??????????

?????????????,???,???????????,????,???????????????????????????????????????????,??????????????????????????????????

?????????????,???? ??????

??,??????????,?????????????????????????????????,????,???????????“?????????200??????????,?????120?,????????40???????????????????”????

????????????,???,??“???????????+??+???????+??”??,???????????,?????“???”????“?????”?

??????,???,?,??????????????????????,?????,??????????????,??????

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

?????,????,????????“?????????????”???????,????,??????????,?????????????????,????????????

“???????????,???,????,?????????,??????????????????”????,??,???,????

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

???????:???????????