?? ???:?????????? ??????????????
![](https://image.chezhanri.com/2019/1113/3cefd821ad125bda0c8aa9aab0264eaa.jpg)
????:1?????????:?????
2????????
3??????????
4??????????????
5???????????
????????????????????????????8???????????????????16????????????????????? ??8????????????????16?????????,????????????????????????????,?????
???????????:???,????????????????????????????????????????????
??,????????????????????,?????????
?,?,????????????????????????????????????????,???????????????? ????:?????????