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

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

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

????????:???????????????? ??“?????”

?? ??????????????53%??

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

2?????????

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

4?????????

5??????

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

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

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

????????:????????????????