?? ??:?“????????30????”???
![](https://image.chezhanri.com/2019/0603/20190603181638744.jpg)
????:1????100?????:??????????
2????????
3???????
4?????
5??????????
???6????????????????????18??????(???????????????? ???)???,???????????“???????????????????????30??”??????(???????)18????,?????????????????????????????????????????,??20???30???
?????,???????,???,????????????????,??
??????????,????????????????,?????,??????????,???,???????,?????????????????????,?????
?????????????,??????????????????????????????????????,??????????????????,???????????????,?????????????????????,????????????????,?????????????????(??????????) ????????????????????:?????????????????