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2????????
3??????v
4?????
5?3????100?
???????6?????10? ?????,????????6?10?10???:?????????????????,6????10??14????11????14?????????????,??????????????????????,????,??????????????????(100~140?????)???(?30~60?????????????,?80??),??????
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1????????????;
2??????,?????????????;
3?????????????????,???????;
4???????????????????????????,???????????
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