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Семенова Мария
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« Ответ #162 : 15 Ноябрь 2011, 14:57 » |
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1. Russian chemicals science is successfully solving many complex problems. 2. Radio astronomy has given manking efficient means for penetration into space. 3. Becquerel's discovery was followed by an intensive research work of Marie and Pierre Curie. 4. Heat energy is transmitted in two different ways.
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