????:1?????????:??2021???????

2?????vx

3??????

4?????????????

5?????????

????????????12?????2????????????? (??????????????????)??????????????????????????????????????????????,??????????????,????,????????,????????????……???,???,??,??????????????????

12???????2????,????????“??”???,????

????????????,??????,???????,????2???????620??,??????3300???????????????1000????????130????,????,????????

???,????????????????????????????11?,?????????,???????????????????????????????????

???,?????????????3???,????86???????????73??????????????11???,??????7?????????200?,?????????????????????????????????,??????“????????????????????????”???,??????????????????????2100???????????????????????1000?????????????????????????130?????,???????????????“????”????????40%???73%?

“????,????????‘?????????????????’??????????”???????,?????,???,????????????,????????????,????????????????????,??,????

??????,????????,????,????????????????????,?????????????;???????????,???????????,????????????????,??????????????,???(?????????????????) ????:???????????