12???????????20?,??????,????????????????????????

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???????????????,?21.5??????????????????????????????????7???8????????????,????????????????164????,??19.2??????????????,??????47.6????

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“???600??????”_????

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????:1????600??????:??98?

2???92??95?

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

4???p?????

5??????400??

12???????????20?,??????,????????????????????????

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???????????????,?21.5??????????????????????????????????7???8????????????,????????????????164????,??19.2??????????????,??????47.6????

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?????????????,??,????????????????????100????????????????????“????”??????????????????(??? ? ? ??? ????????????? ????????????????????????)

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