?? ?????6.8?????????53???
????:1????????????:???????????
2???????????
3?????????
4??????????
5??????????
??,?7?12?????????????????30??,????53??62?????,???
??,????,??,?????,???????????????????,???????????????
7?9????5???,???6.8??????????,???,?20????????????6900?,??20????3???????(?????????????????)???????????????27??(??)
?????????:??????????