???????8?22?? (?? ?????????????????)???????22?????????????,??2021?????8???“??????????”????“???????????????”??????????,?????,?8?????????20??7??“??????”“???”?

?????????????????????????????????????????????????????????????????????????7???,?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????

??????????,??????(????????????????????????????????),?,???????,????????????????

???,???“?????????????????????”????90?????20?,???“?????????????”????????????????????????30??60??????10???,??????????????????

???????????????,???,?????????????,??

“??12306????‘???’???????4??,?????‘?’??10?????????????????????????????,??,??????????????,???”???

???:“???,?????,??‘???’‘??’????????”(??) ????:??? ??“??mm??”????

?? ?????7?????????“???”“???”

????:1???mm??:?????qt

2???????

3????????

4??????????

5??????????

???????8?22?? (?? ?????????????????)???????22?????????????,??2021?????8???“??????????”????“???????????????”??????????,?????,?8?????????20??7??“??????”“???”?

?????????????????????????????????????????????????????????????????????????7???,?????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????

??????????,??????(????????????????????????????????),?,???????,????????????????

???,???“?????????????????????”????90?????20?,???“?????????????”????????????????????????30??60??????10???,??????????????????

???????????????,???,?????????????,??

“??12306????‘???’???????4??,?????‘?’??10?????????????????????????????,??,??????????????,???”???

???:“???,?????,??‘???’‘??’????????”(??) ????:???