?? ????????:??????????,????
????:1?????????:?????
2???????????
3???????????
4?????????
5???????
??,????????????????????50%????????????????????????80%?
9???28???????????,?????????????????????????????????????????????????????,??,??,??????????
??????????????????????,???,?????????????????1000??????????????1200????????????????,??????????????????,?D????,???
????,????????????????????????????????,??????????????????(? ????? ??? ?)
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