?? ??????????????53%??
![](https://image.chezhanri.com/2019/1120/3bbe91ebdcc3b1bf1440b4be50df6845.jpg)
????:1??????:??????
2?????????
3????????????
4?????????
5??????
????(????????????):6???????????????17???30?????????????,????????????????,53%???????????
??????????,?????3.31??????,??“?”??“?????????”???????????“??”??4.8????,??12.8??????????????????,??1978????????????5.05%??????????????13.84%???4?????,????515??????1000?,?????????,2019?????????????????????2000?????????????40%???,?????????????????,4.5???
?????????,??????“??????”,“????”??????????,????????,???“????????????”?
????????:????????????????