??????????????2??16? ?????????????16???????????,???????,??????
??,?1957????9??????,???????????????????????,????????,2017??2021??????(?)
?????????:???????????????????????
??:?????????????????
??????????!??????????40?
??????:B?????????????
?????????????15?????
?????????????????7???
????????????:????????
????????????????12?19?
????3???????7.2%
???????????????????
????3???????
??????????????????????
?????????????????????
??????????172?4.9???36.7?
??????????????????
?????????????????????
??2???????0.8%??????
???????????:??DQ??????
??????:?????????????
??????????????
???????????10????????
?????????????????????
??????:B?????????????
?????????????????????
????????????????????
????????23????2???????