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A semiconductor is a solid material that is able to conduct electricity, but with conductivity less than that of a good conductor and greater than an insulator. Semiconductors include silicon, and are used in the manufacture of photovoltaic cells, as well as computer chips and other electronic devices.

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Bransch/domän: Natural environment
Category: Climate change
Company: BBC
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Bransch/domän: Holiday Category: Festivals

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The most important of the traditional Chinese holidays, Chinese New Year represents the official start of the spring, beginning on the first day of ...