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1?????0.2g?2?0.1g?3?714?
2???0.1g?2?57???0.2g?2?0.1g?3?1014?
3????0.2g?2?6?
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2???0.1g?2?57???0.2g?2?0.1g?3?1014?
3????0.2g?2?6?
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