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{{B}}Sugar Power for Cell
Phones{{/B}} Using enzymes commonly found in living cells, a new type of fuel cell produces small amounts of electricity from sugar. If the technology is able to succeed in mass production, you may some day share your sweet drinks with your cell phone. In fuel cells, chemical reactions generate electrical currents. The process usually relies on precious metals, such as platinum. In living cells, enzymes perform a similar job, breaking down sugars to obtain electrons and produce energy. When researchers previously used enzymes in fuel cells, they had trouble keeping them active, says Shelley D. Minteer of St Louis University. Whereas biological cells continually produce fresh enzymes, there’s no A. When enzymes can be commonly found in living cells. B. When the technology of producing a new type of fuel cell appears. C. When the technology of a new type of fuel cell is suitable for mass production. D. When the technology of mass producing cell phones appears. 更多"下面有3篇短文，每篇短文后有5道题，每题后面有4个选项。请仔细阅读短文"的相关试题: [单项选择] 下面有3篇短文，每篇短文后有5道题，每题后面有4个选项。请仔细阅读短文并根据短文回答其后面的问题。 {{B}}第一篇{{/B}}
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