2023年職稱英語(yǔ)考試?yán)砉ゎ怋級(jí)模擬閱讀

　　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.　　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.　　1. 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.　　2. 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：　　1. C A和D明顯不是正確答案。B不是正確選擇，因?yàn)橹挥挟?dāng)這種新的燃料電池被大規(guī)模生產(chǎn)時(shí)，才有可能實(shí)現(xiàn)用甜飲料給手機(jī)提供電能。　　2. C 該段第二句When glucose from a sugary liquid penetrates a pocket，the enzyme oxidizes it，releasing electrons and proton中的it指代glucose，而不是a sugary liquid，因 此C是正確選擇。　　3. D 文章的最后一段指出了這種新型燃料電池的優(yōu)點(diǎn)，即A、B、C所述內(nèi)容。最后一句說(shuō)，科學(xué)家預(yù)計(jì)，在不到三年的時(shí)間里這種新技術(shù)便可在大眾的流行產(chǎn)品中使用。所以D是正確選擇。

　　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.　　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.　　1. 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.　　2. 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：　　1. C A和D明顯不是正確答案。B不是正確選擇，因?yàn)橹挥挟?dāng)這種新的燃料電池被大規(guī)模生產(chǎn)時(shí)，才有可能實(shí)現(xiàn)用甜飲料給手機(jī)提供電能。　　2. C 該段第二句When glucose from a sugary liquid penetrates a pocket，the enzyme oxidizes it，releasing electrons and proton中的it指代glucose，而不是a sugary liquid，因 此C是正確選擇。　　3. D 文章的最后一段指出了這種新型燃料電池的優(yōu)點(diǎn)，即A、B、C所述內(nèi)容。最后一句說(shuō)，科學(xué)家預(yù)計(jì)，在不到三年的時(shí)間里這種新技術(shù)便可在大眾的流行產(chǎn)品中使用。所以D是正確選擇。