???????????????12?????20? (?????????????????? ??????????????????)???????????????20?????????????,????????????????????,??????????,????????“??????????”,????????

12????20????,??????????????? ??????????? ????

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

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

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

“?????,??”????,????????????,???????“????”“??”“?????????????”????????8??????????????????????????????,????????????????????????????

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

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

??????:??????? ??“????????”????

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

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

2?????????

3?????????

4?????vx

5????????????

???????????????12?????20? (?????????????????? ??????????????????)???????????????20?????????????,????????????????????,??????????,????????“??????????”,????????

12????20????,??????????????? ??????????? ????

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

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

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

“?????,??”????,????????????,???????“????”“??”“?????????????”????????8??????????????????????????????,????????????????????????????

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

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

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