?? ??????10?????90%!???????????????????????
![](https://image.chezhanri.com/2020/0323/bf8d4d2adb7f1978af24940d9dd4450a.jpg)
????:1????????????:??????
2???????????
3???????????
4?????200??500????
5???????
??????8??????4???????? (???????????? ??)??????????,????????????????????,?????????????????,?????????“????”?
??????????????????????,????,???????????
???????????,?????????,????????
????????????????,????,???????????????????????,?????????????????,??,??????????????????,??????????????????“?????”?
??????????????,?????????????????,???????????????????????????,???????,?????????????,????????????
??,??????????,??(???B???????????CT)??????????????,??????????????,????????
????,????????,??????????????,???????????????????????????????????????????????????????????????????,?,????????????????????,10??90%?
???,???????????????????,?????????,??,?????????????????????,????????????????;??????
??????,?????,?;???????????;????????;??,??????????????????????,?????????(???????) ??????????:?????????