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

2?????vx

3??????????????

4???????

5?90??????

??1?????????17????????????? (??)???????17?????????,?????,????1?18???????

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

?????????(?)

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

?????,??????????“?????”?,?,???????????????????????????????????????????4???????

??,??????????,???????????5???????????????,???“?????????????”“??????????”“???”“????”“????????”?????????????????(??)

????:???