?? ??????????? ?????“?????”
????:1????????????:??sn??
2?????????
3?????????
4????????????
5??????????
???????2?????????6??? (?????????? ??????????????)“??????,????????????????”,?????????????“??”????
??????,?????,??????
???:??????????????,????(????????? ????)???????????????,?,???“????”,????“?????????????????”?
????????????????,??,???????????????????????,??,????,??????????????,??????
?,???,?????,?,????????,??,?????????????????????
??????:????????,????(??? ???????????)??,5??????10????,?????,????????????????,?????????,????
???,?????????,????,?????“???????”(?????????????????????????)???????????????????,???“???”??????,???????“?????????????”?
2??5?????????,?????“???”????????????????? ??? ???????????????????7???????“???”????????????,“????????”?????????????????,??????????????140???????????;??????????????,????;????????????????“??????”??,???????????,???
????????,???????????????????280??????????350??????????,????80%??????????,“????”?????????56???????,??
??????,??????????????,???????????,??;??????????????????????,?,????????????????“??????????,????????????”??????????????????
?,?????????????????,????
???????????????,??????????????????????????????,?????????????????????????,???“????”???????????(?????????)
??????:?????????????????????