11????21??,???-19.6?,????????“?”????????????????????,?????????????,????????????????

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

(???? ???????? ?????????? ?? ? ??? ??????????)

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

“????vx”_????

?? ????????“??”????

????:1?????vx:???????

2????????

3??????

4???????

5??????

11????21??,???-19.6?,????????“?”????????????????????,?????????????,????????????????

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

(???? ???????? ?????????? ?? ? ??? ??????????)

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