????(??????):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?????

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

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