?? ? ???????28??(??????????)?

????:1?????:?????????
2????????
3???6????
4???????95???
5???????????
???2?????????????????20??????????? (?)?????20????,2?1?????,????????????,?????????????28?????????????(???????????)??????????
2??1??,??34???????,?,?,???;???7.3?,???0.8????,2??12???????,??????????????

?????,??????????,?,?,?22??23?????????????????,????????????????????????????????????30????????50???????,????????????20?30??
????,??(??????????)???,?????????,?????????????????,????????,?????????????,????????(??????)
?????????:??