????:1??????????:??????

2????????

3??????????????

4???108????????

5??????50??

???????????????(???????????):6????????????17?????????30????????,?????????????????????????,53%???

??,????3.31??????????,??????????“????????”???????????“?????”??????????“????????????”?????????????4.8??,?????????12.8???????,??1978?5.05%??????????????13.84%????????????????4????,????515??????1000??????,??,2019????????2000???40%???????????,??????,4.5????????

??????????,????????????“??”,“?????”?????????,????,?“?????????????”?

???????:???