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

2?????????

3???????????

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

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

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

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

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

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

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