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

2?????

3??????????

4?????????

5??????????

6???6?????????????“?”??????,?????????????????????????????

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

????????

“????20-35?,?60%????,?????”?????????????,???????,???????????,?????????,??????“?????????????”???????????? 

????“???????????”?????

????,???????????????????????????????????????,??????6????6??“?????????????”?????????????????,???,?????

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