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

2???????

3?????

4??????vx

5???????

??11??23?(?? ???????)????????30???23???????????????????????????“??????????????”,?,20?“??”?????????????“?????”??????????

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

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

????20???????????????90???,??????????????????????????????

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

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

????????????,?????????20??????????“??”,?????????????“?????????”???,?????????????????,?????????????????????????????

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

??????????,???????POS???????,?????????????????,?????????????

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

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