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

2?????

3????????

4???????

5?????vx

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