?????????1?????7????????? (??? ???????????????????)???????7?????????????????1????????,????????,?,??????????????????????????????????????????

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

??????????:?????? ??“???????”

?? ??????????1???????

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

2?????????

3?????????

4?????????

5????????vx

?????????1?????7????????? (??? ???????????????????)???????7?????????????????1????????,????????,?,??????????????????????????????????????????

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

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