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
"It's true the Netherlands has high productivity and works fewer hours," says Daniela Glocker, an economist on the Netherlands desk at the OECD, "but what we've seen over the past 15 years is that it [productivity] hasn't grown.
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Жители Санкт-Петербурга устроили «крысогон»17:52,更多细节参见同城约会
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