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

2????????

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

4???????

5????????

21????,??????????????????????????????,???????????????????,???,?????21?????

9??????????24????28??????????,??21??????????????????,???,???????????????15????????,?????????????????

??,??10?????,???2.3??,???????????????????????????????????????????

??????????8?,???2441.3??????????????,??????????21.8%,????52.6%,??????????????

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