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

2??????vx

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

4???50??????????

5???????????

?????????????????????2?12? ????12??????,??????????????????,?????????????????????????

2??????????12????????????,??????????????,?????????????? ??????????????? ??????????? ?

??,??,1?????????????28??????????2???????7?(???),???????5232???,?30????,????61756?,?3289????

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

????:??