?? ????????????????????????
????:1?????????:??????????
2?????
3????????95?
4????????????
5?????
????????????????????????????????????????!
?????
??????????
“?????????????????????”“??????????????????????”
???????“?????????”
????????????
??????????
?????
?????????=???????(???????)?+?+???
?????
????,?,??????,?????
??????:??????????????????????“???”?
??????????????
??????????????
??,????????,??????????(????????????/????),???????,?????
?????
?????????,?????????
?????????????????????????
?,??????
???
???????????????????,????????
???????????
???????????,????4500?????????,?4200??????,?3600?????????,?????????????300???
??????????300??
???????????????????????,?????????,?4200?????????????????????????-3600??????????=600???
?
???????????
????????????????
“?????????”???????????????
??
???
“?????????”?????
?????
??
????????:“???????”???????????????????
?????:?????