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