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共用题干 New Research Lights the Way to Sup

tikufree2019-12-17  30
问题 共用题干New Research Lights the Way to Super-fast Computers
1. New research published today in the journal Nature Coniniunications,has demonstrated how glass can be manipulated to create a material that will allow computers to transfer information using light. This development could significantly increase computer processing speeds and power in the future.
2. The research by the University of Surrey,in collaboration with the University of Cambridge and the University of Southampton,has found it is possible to change the electronic properties of amorphous chalcogenides,a glass material integral to data technologies such as CDs and DVDs. By using a technique called ion doping,the team of researchers have discovered a material that could use light to bring together different computing functions into one component,leading to all-optical systems.
3. Computers currently use electrons to transfer information and process applications.On the other hand,data sources such as the Internet rely on optical systems:the transfer of information using light. Optical fibres are used to send information around the world at the speed of light,but these signals then have to be converted to electrical signal once they reach a computer,causing a significant slowdown in processing.
4 .“The challenge is to find a single material that can effectively use and control light to carry information around a computer. Much like how the web uses light to deliver information,we want to use light to both deliver and process computer data,”said project leader,Dr. Richard Curry of the University of Surrey.
5 .“This has eluded researchers for decades,but now we have shown how a widely used glass Call be manipulated to conduct negative electrons,as well as positive charges,creating what are known as‘pn-junction'devices. This should enable the material to act as a light source,a light guide and a light detecto—something that can carry and interpret optical information.In doing so,this could transform the computers of tomorrow,allowing them to effectively process infonna- tion at much faster speeds.”
6. The researchers expect that the results of this research will be integrated into computers within ten years .In the short term,the glass is already being developed and used in next-generation computer memory technology known as CRAM,which may ultimately be integrated with the advances reported.
选项 Paragraph 2_________A: Expectation of the discoveryB:The problem of current computers.C:.A new findingD: The purpose of the researchE: Public reaction to the discoveryF: The use of the new material
答案C
解析本段大意：由三所大学共同合作进行的研究发现，改变无定型硫属化合物的电子特性是有可能的。研究团队通过使用离子注入的技术，发现了一种可以使用光汇集不同的计算功能组合到一个组件的物质，形成全光系统。因此本段主要介绍研究团队的新发现，故选C。 本段第三句提到，光纤被用来在世界各地以光的速度传递信息，但是一旦信号到达一台电脑，这些信号必须转换为电信号，导致处理速度严重放慢。很显然，这是当前电脑的一个问题。故选B。 根据理查德的话可以知道，研究的目的是使用光来传递和处理计算机数据。本段主要介绍研究的目的，故选D。 本段主要介绍如何把应用广泛的玻璃处理成可以同时传导正、负电子的设备。也就是在研究中引入新的材料。故选F。 根据第一段“This development could significantly increase computer processing speeds and power in the future.”可知，研究结果可以提高电脑的数据处理速率。故选B。 根据第三段第一句可知，当前电脑是用电子（electrons）来传递信息的。 根据第二段的“…material that could use light to bring together different computing functions into one component, leading to all-optical systems.”可知，选F。其中的material 指的就是the new glass material。 根据第五段“This should enable the material to act as a light source… that can carry and interpret optical information.”可找出答案。故选A。
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