?? ??????????????????:???
![](https://image.chezhanri.com/2020/0325/ca07a15d76a4eeb87826a4fab4efbf96.jpg)
????:1???????????:????????
2???????
3?????????
4????????????
5????????
????????8?16?? ?????????????????8?????16?????????
??:8??????????????16??,????????????????????31?????????????????????????????
???????????????????????????,??????,???????
?,?????????,???50????????,????????????????????,?,??????,???,????? ???????:???