?? ???7????????????????50%
![](https://image.chezhanri.com/2019/0802/20190802111236650.jpg)
????:1???????????????:?????
2?????????
3???????
4??????????
5?????
?8??23?? (???)????23???1????7??????????????,???7???50%?
????????,??????????7??,???????31.0??,??14.0%???,????7.4???,?49.8%;??4.7??,????????????19.8%?
????1?7?,????1994????????????????,????91???1???7?????????????????,?4158????(???,????????????),??2.6%???2947??,???????19.2%?(???????)
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