????:1?????:??????100???

2???????

3???????

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

5???????????

?????????????2???????????12??????????? (? ???????)2?????12??????,???38??????????????????40??????????????????????????

??,????1988??,38??,?????21???????????????,???????????????320??????????????,??,?1.63??????????,?????????????????????

?????,??????????250?????????????

?????????????,??????????????,??????400?,?????????????????,?????????????????????

???????,????????,??????(??????????) ???:??