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

2?????vx

3??????????

4?????????????

5?????????

?7?13?(? ???)??????????“???????????????”????????13?????

???7????13?????????,?“???”????? ? ????

??????????????????????500????

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

????,“???????????”???,???,??????????

???7??13?,???“???????????????”?????????????? ????? ???

??????,30?,?????????????????????????????“????”?,????????????????“?????50???,???????????......”“??“?”,??????”“?????”????????,?????????????????????????,????????????????????????????;????????????

????????????????????????7?13????,??“??????????”??????????????? ???????????????????????? ?

??????????????????,????????,???,???8????

????????“??????????”????????????????????????25????105?????????,??????(???????????)

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