2015年职称英语考试（理工类C）真题及答案(文字版)

　　19. The blood of each women was tested once a month during pregnancy.

　　A. Right

　　B. Wrong

　　C. Not mentioned

　　20. Kids with ADHD commonly fail in school.

　　A. Right

　　B. Wrong

　　C. Not mentioned

　　21. The women with high levels of PAHs in their blood were more likely to have kids with ADHD

　　A. Right

　　B. Wrong

　　C. Not mentioned

　　22. Traffic and home heating were considered to be the biggest sources of PAHs for the subjects in the research.

　　A. Right

　　B. Wrong

　　C. Not mentioned

　　第三部分：概况大意与完成句子

New research lights the way to super-fast computers

　　1)New research published today in the journal Nature Communications, 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 signalsonce 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 informa

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