??? ????? ??????? ??????????????????????
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???? 1/6??2?????1??????,??,??????????????????????????????????,?4?????,?????????
??:???????????????????????
?? ?
?????????????????????
???????5?????:????????
??????????????360°????
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???????????10????????
?????????????????????
????????????16??????
??????????!??????????40?
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??????0.7%???0.8%
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ISM??????????????
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?????????,??????????40??
????3???????7.2%
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?????????????????7???
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????????????????12?19?
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