?? ?????????????????4?????!?
![](https://image.chezhanri.com/2019/0729/20190729180728575.jpg)
????:1?????????300:???????
2?????????????
3??????
4?????????????
5?????????
??????????????????????????(16????????????????),????,??
????,??????2024????(???)?????1000?,????????????????????,????????(???,???????)???????????????,???????
???
??????,??????????,??????,????????:
(1)??160?????:
?????????:????????????????????,?????????????????0.45??????????????????????
???????:????????,???????????020????????????????(???????20?),?0.48??????;2040??(??40??),?????0.44?????????????????;40????????????????0.40????????????????
(2)?????160????????????,????????????0.37????
???????:
(1)?????????????160??????:
????????:??=??????????????×????????????
???????????:???????????=???+??????+?????????,???????=????????????????×???
(2)???????????160?,???=??????×?????????????????????
??????,???????;????,???????????????????,???????0.5???????????,0.5????????1??????
?4??????(??,??160??????,?????10??,???????9.3????;??????????????160???????????12.2???)??????????,??????,???????????????,?(??????),????,?????????2024???????????????
???????????,???????????????????,????????????????,????????(??????),?????????????????????,?????,????????,?????,???
(?????????????? ????????)
??:???????