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

2??????????

3?????????

4??????????

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

????,?7??12?30???????,?53?????62???,????

??????????????,????,??,???????????????,?????,??

7????9????????5?????????,??????????????6.8????????????,??????,???20??6900??,?20??????????3??(?????????????????)????27??????????????????(?)

???:????