??????2??10??????(????????????????? ??)10?????500????????,???????????????????34??95???100?????????????????????,?????

?????500???????????,??????????????????????????????????????,????????“????????????????”???,????????,??????,??????????????????????????

??:???????? ??“????”????

?? ?????????500???:??????????????

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

2?????????vx

3?????400????

4?????

5????????

??????2??10??????(????????????????? ??)10?????500????????,???????????????????34??95???100?????????????????????,?????

?????500???????????,??????????????????????????????????????,????????“????????????????”???,????????,??????,??????????????????????????

??:????????