?? ???????????????? ???????????????????
![](https://image.chezhanri.com/2020/0318/56574f03d08f190747e4689b9f9c8ced.jpg)
????:1??????????:??????????
2????????
3???????
4???????????
5??????50?????
?????????6???????29? ???,6????20??,????91???????,?2.6??????????,??1961??????1???????,?(????)???????(???)?????????????????????????24??????,?(????????????????)???????3?????????????????????????????,?6?????????????????????29?4?????57.99?????,?????????????0.90?????????????,?????1951?????1?????????????
6?29??????????8???,??????0.74~1.94???????,?0.39~0.89???(6??????????????????????29???7?5?????????????),???,???7????????????????2???????0.80??????,??????7?????????????4????1.00????????,????????(??)??????????????????????7?????????5??
??????????,??????,??????,???????????,????????????????????????,??????????????????????????????,????????????????7???????????????;??????,????????????;??????,??
???,?,?????,????????????????,??,????????????????????????????? ??:??????????????????