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

2?????668??

3?????95?

4?????

5???????

?1??2?? ???????????????,???,1?????????????????2????10???????????????1??,??????????????????????4.8???????????,????????????????10???????????

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

??105???20?,?2????????4?440?????????86??????????????13?????????????

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