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

2??????

3?????????

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

5?????vx

????1?????????????????????8??? (?? ??)8??,?????????????“????? ???”???????“?”??

????? ????

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

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

??????????????,??????????,??????????????????????????,???“??”???????“?????????????????????”??????????????????????????3???????????1????????????,???????

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

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