课程咨询

雅思备考规划

扫码添加助教免费咨询雅思备考规划

扫码关注回复雅思获取最新雅思口语题库和备考资料

雅思阅读实战模拟题及答案(3)

2015-06-18 11:30:04来源:网络 柯林斯词典

  Key and Explanations:

  1. D

  See Paragraph 3: ...Alex Mischenko, of Cambridge University. Using commercially available paraelectric film, he and his colleagues have generated temperature drops...

  2. C

  See Paragraph 5: The first Pentium chips sold by Dr Moore's company, Intel, in 1993, ran at 60m cycles a second.

  3. F

  See Paragraph 8: ...Rama Venkatasubramanian, of Nextreme Thermal Solutions in North Carolina, claims to have made thermoelectric refrigerators that can sit on the back of computer chips and cool hotspots by 10℃.

  4. E

  See Paragraph 8: Ali Shakouri, of the University of California, Santa Cruz, says his are even smaller梥o small that they can go inside the chip.

  5. B

  See Paragraph 9: To improve on this, IBM's research laboratory in Zurich is experimenting with tiny jets that stir the liquid up and thus make sure all of it eventually touches the outside of the channel--the part where the heat exchange takes place.

  6. TRUE

  See Paragraph 2: ...paraelectric materials. These act like batteries when they undergo a temperature change: attach electrodes to them and they generate a current.

  7. FALSE

  See Paragraph 3 (That may be enough to change the phenomenon from a laboratory curiosity to something with commercial applications. ) and Paragraph 4 (As to what those applications might be, Dr Mischenko is still a little hazy. He has, nevertheless, set up a company to pursue them. He foresees putting his discovery to use in more efficient domestic fridges?

  8. FALSE

  See Paragraph 5: Heat is released every time a logical operation is performed inside a microprocessor, so the faster the processor is, the more heat it generates. Doubling the frequency quadruples the heat output.

  9. NOT GIVEN

  See Paragraph 9: In the future, therefore, a combination of microchannels and either thermoelectrics or paraelectrics might cool computers.

  10. D

  See Paragraph 6: Tweaking the processor's heat sinks ?has reached its limit. So has tweaking the fans that circulate air over those heat sinks. And the idea of shifting from single-core processors to systems?also seems to have the end of the road in sight.

  11. heat

  See Paragraph 1: Today's high-tech world, however, demands high-tech refrigeration. Heat pumps are no longer up to the job. The search is on for something to replace them.

  12. paraelectric

  See Paragraph 3: Using commercially available paraelectric film, he and his colleagues have generated temperature drops five times bigger than any previously recorded.

  13. thermoelectric

  See Paragraph 7: ...the thermoelectric effect. Like paraelectric materials, this generates electricity from a heat source and produces cooling from an electrical source. Unlike paraelectrics, a significant body of researchers is already working on it.

  14. radiator

  See Paragraph 9: The last word in computer cooling, though, may go to a system even less techy than a heat pump--a miniature version of a car radiator.


为你特别匹配的雅思超值课程,祝你和雅思分手!
  • 新东方11月雅思公开讲座

    新东方雅思11月公开讲座

    新东方教师直播教你全科技巧!

    每天1小时

    查看详情
  • 雅思机考实战

    雅思机考实战

    剑桥雅思正版题目机考实战!

    每天1小时

    查看详情
  • 【知心雅思】6分录播课 (A类)

    【知心雅思】6分录播课 (A类)

    适合人群:想要冲6分的考生

    课时:434

    查看详情
  • 【知心雅思】6.5分录播课 (A类)

    【知心雅思】6.5分录播课 (A类)

    适合人群:想要冲6.5分的考生

    课时:464

    查看详情
  • 【知心雅思】7分录播课 (A类)

    【知心雅思】7分录播课 (A类)

    适合人群:想要冲7分的考生

    课时:443

    查看详情
雅思备考资料包

扫码添加助教

免费获取雅思备考资料包

更多资料
更多>>
更多内容

移动学习

二维码

2024年9月-12月雅思口语题库

扫码即可免费领取最新雅思口语题库
更多>>
更多公开讲座>>

2024年雅思考试机经

扫码免费领取【雅思考试机经】

考试机经
更多>>
更多资料