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The background radiation from cosmic rays increases with altitude, from 0.3 mSv per year for sea-level areas to 1.0 mSv per year for higher-altitude cities, so for best results use this on a plane or in outer space
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Jo Haywood has volunteered for the Daventry Community Larder for two years and said a "diverse community" used the service
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2024年12月23日 星期一 新京报