?7?1?????? (???? ????)??????????????7???1?,??,??????2???????????????27?,????????????????,?????

????,????????????,????????????2.6?,?????????,??,????????

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

???????????????6??????????????29?,????????????3.0???????,????????????????,???,???????????????????

?????????????????????,?,?????????????????6????11???????????,???4.7?????????,???????????2??,????????????????3.0??(???????????????????) ?????????????????????:?????????????????? ??“??????”

?? ?????????????????

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

2???????

3???????

4?????98????

5???50??????

?7?1?????? (???? ????)??????????????7???1?,??,??????2???????????????27?,????????????????,?????

????,????????????,????????????2.6?,?????????,??,????????

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

???????????????6??????????????29?,????????????3.0???????,????????????????,???,???????????????????

?????????????????????,?,?????????????????6????11???????????,???4.7?????????,???????????2??,????????????????3.0??(???????????????????) ?????????????????????:??????????????????