????????????????????????????2??????????????2? (??????? ??)?(????????????????)??????????????2??1?????????????,??????????????????????????????

??????,??????????????????2??1??,????????????,????????????????????

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

?????2??1????,???????90%???

2??????2?,??????????????????,??(????) ?????????????:?? “????????”_????

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

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

2???????

3????????????

4?????????

5???????vx

????????????????????????????2??????????????2? (??????? ??)?(????????????????)??????????????2??1?????????????,??????????????????????????????

??????,??????????????????2??1??,????????????,????????????????????

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

?????2??1????,???????90%???

2??????2?,??????????????????,??(????) ?????????????:??