?? ?????????????????4?????!?
![](https://image.chezhanri.com/2019/0618/20190618110455934.jpg)
????:1????????:????98???????
2????????????
3????????
4??????9598
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????????
????????????????????,??????????????????,????????,??????(???????????????),?????????????,??????????????,????????????????????,??,??????
(?? ???)
????????????:????????