?? ????? ??????????
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????:1???????:?????????
2???????????????
3???????????
4??????????????
5???????????
??????????(????):???,?????????????????????,??????????????????,?????????
???,?????????????????,???,??
???????,???????????????,???,?????????????????????????????????,?????????,???????????????60????????????,???????????????
???????,????;?????????,???????????;?????????,???90%?
??????????????????,�??????????�???????????????????,????????,60?????34%,?????????????????????????????????
????,???????????,???????????,??6???????????????,????50%??????????????????????????????,????????�???�??,?????
??????????,2????????5??????????????????,?????????????????????24%? ??????????????:?????????