Sugar Power for Cell Phones

　　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.

　　Minteer and Tamara Klotzbach，also of St Louis University，have now developed polymers that wrap around an enzyme and preserve it in a microscopic pocket.We tailor these pockets to provide the ideal microenvironment for the enzyme，Minteer says.The polymers keep the enzyme active for months instead of days.

　　So far，the new fuel cells dont produce much power，but the fact that they work at all is exciting，says Paul Kenis，a chemical engineer at the University of Illinois2 at Urhana-Champaign3.Just getting it to work. Kenis says，is a major accomplishment.

　　詞匯：5enzaImI5lektrEJd5plAtinEm5membreinp

　　electronn.電子 oxidizev.氧化degradev.降解 glucosen.葡萄糖5pClimE7baiEudi5reidEblp

　　microenvironment n.微環(huán)境 embedv.埋置，插入5prEutCnp

　　試題

　　A When enzymes can be commonly found in living ceils.

　　C When the technology of a new type of fuel cell is suitable for mass production.

　　2. What trouble did Minteer and Klotzhach have in their research?

　　B They had trouble keeping biological cells active.

　　D They had trouble finding mechanism for producing enzymes.

　　A when bags of enzyme are embedded in the new fuel cell.

　　C when the enzyme oxidizes the glucose from a sugary liquid that goes through a pocket.

　　4. What is exciting about the new fuel cells?

　　B Their limited power generation capacity is a good beginning.

　　D Their limitless power generation capacity is a major accomplishment,

　　A The new fuel cells run on sugar that is easy to find.

　　C The new fuel cells are biologically degradable,

　　答案與題解：

　　2. A 文章第三段的第一句是問(wèn)題的答案。

　　4. B 第六段的大意是，盡管這種新型燃料電池還不能產(chǎn)牛很多電能，但是，它能夠產(chǎn)生電能的事實(shí)就已經(jīng)是很大的成就了。因而激動(dòng)人心。所以只有B是正確答案。

　　Sugar Power for Cell Phones

　　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.

　　Minteer and Tamara Klotzbach，also of St Louis University，have now developed polymers that wrap around an enzyme and preserve it in a microscopic pocket.We tailor these pockets to provide the ideal microenvironment for the enzyme，Minteer says.The polymers keep the enzyme active for months instead of days.

　　So far，the new fuel cells dont produce much power，but the fact that they work at all is exciting，says Paul Kenis，a chemical engineer at the University of Illinois2 at Urhana-Champaign3.Just getting it to work. Kenis says，is a major accomplishment.

　　詞匯：5enzaImI5lektrEJd5plAtinEm5membreinp

　　electronn.電子 oxidizev.氧化degradev.降解 glucosen.葡萄糖5pClimE7baiEudi5reidEblp

　　microenvironment n.微環(huán)境 embedv.埋置，插入5prEutCnp

　　試題

　　A When enzymes can be commonly found in living ceils.

　　C When the technology of a new type of fuel cell is suitable for mass production.

　　2. What trouble did Minteer and Klotzhach have in their research?

　　B They had trouble keeping biological cells active.

　　D They had trouble finding mechanism for producing enzymes.

　　A when bags of enzyme are embedded in the new fuel cell.

　　C when the enzyme oxidizes the glucose from a sugary liquid that goes through a pocket.

　　4. What is exciting about the new fuel cells?

　　B Their limited power generation capacity is a good beginning.

　　D Their limitless power generation capacity is a major accomplishment,

　　A The new fuel cells run on sugar that is easy to find.

　　C The new fuel cells are biologically degradable,

　　答案與題解：

　　2. A 文章第三段的第一句是問(wèn)題的答案。

　　4. B 第六段的大意是，盡管這種新型燃料電池還不能產(chǎn)牛很多電能，但是，它能夠產(chǎn)生電能的事實(shí)就已經(jīng)是很大的成就了。因而激動(dòng)人心。所以只有B是正確答案。