????:1???2020??:??????

2???????????

3?200??????

4??????????

5???????VX

?????6?????????????????????????28????????????????????????????? (????????????????? ????????)???????????????28??????????????,?????????“???+???”??,?????????????????“????”,?????“15??”,???????????????“????”??????????

??????????????????????2019???????“?”??,???????????????????????????????????,???????????2023??,?????????????44%,??????????????80%??????????

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

28??,?????,??????????,?????,???????????????,????,?????,??,??????????????????????,?????????????????????????

??,????????????,??????1??????????,18??,N?,?1+18+N???????????“15????????????????”,??????????????????,?????????????????????????(??) ?????:????????