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职称英语考试真题及答案理工类A级概括大意
第3部分：概括大意与完成句子(第23—30题，每题1分，共8分)
下面的短文后有2项测试任务：(1)第23——26题要求从所给的6个选项中为第2——5段每段选择1个最佳标题;(2)第27——30题要求从所给的6个选项中为每个句子确定1个最佳选项。
First Image-recognition Software
1. Dartmouth researchers and their colleagues have created an artificial intelligence software that uses photos to locate documents on the Internet with far greater accuracy than ever before.
2. The new system, which was tested on photos and is now being applied to videos, shows for the first time that a machine learning algorithm (运算法则) for image recognition and retrieval is accurate and efficient enough to improve large-scale document searches online. The system uses pixel (像素) data in images and potentially video — rather than just text — to locate documents. It learns to recognize the pixels associated with a search phrase by studying the results from text-based image search engines. The knowledge gleaned (收集) from those results can then be applied to other photos without tags or captions (图片说明), making for more accurate document search results.
3. "Over the last 30 years," says Associate Professor Lorenzo Torresani, a co-author of the study, "the Web has evolved from a small collection of mostly text documents to a modern, massive, fast-growing multimedia data set, where nearly every page includes multiple pictures or videos. When a person looks at a Web page, he immediately gets the gist (主旨) of it by looking at the pictures in it. Yet, surprisingly, all existing popular search engines, such as Google or Bing, strip away the information contained in the photos and use exclusively the text of Web pages to perform the document retrieval. Our study is the first to show that modern machine vision systems are accurate and efficient enough to make effective use of the information contained in image pixels to improve document search."
4. The researchers designed and tested a machine vision system — a type of artificial intelligence that allows computers to learn without being explicitly programmed — that extracts semantic (语义的) information from the pixels of photos in Web pages. This information is used to enrich the description of the HTML page used by search engines for document retrieval. The researchers tested their approach using more than 600 search queries (查询)on a database of 50 million Web pages. They selected the text-retrieval search engine with the best performance and modified it to make use of the additional semantic information extracted by their method from the pictures of the Web pages. They found that this produced a 30 percent improvement in precision over the original search engine purely based on text.
23. Paragraph 1 _
24. Paragraph 2 _
25. Paragraph 3 _
26. Paragraph 4 _
A. Function of the new system
B. Improvement in document retrieval
C. Publication of the new discovery
D. Problems of the existing search engines
E. Popularity of the new system
F. Artificial intelligence software created
27. The new system does document retrieval by _.
28. The new system is expected to improve precision in _.
29. When performing document retrieval the existing search engines ignore __ __
30. The new system was found more effective in document search than the _
A. using photos
B. description of the HTML page
C. current popular search engines
D. document search
E. information in images
F. machine vision systems
参考答案：第3部分：概括大意与完成句子(第23—30题，每题1分，共8分)
23-26. F A D B
27-30.A D E C
2011版职称英语考试历年真题及全真模拟试卷的序言
外语能力是衡量专业技术人员素质和专业水平的一个重要方面，特别是在经济全球化和我国对外开放不断发展的新形势下，测试专业技术人员对外文文献的阅读理解能力势在必行。
全国专业技术人员职称英语等级考试是由国家人事部组织实施的一项国家级外语考试。考试按职称的系列、级别分为A、B、C三个等级，按照专业不同分为综合、理工和卫生三个类别。总体来说，职称英语考试主要考查考生理解书面英语的能力，“要求应试者能综合运用英语语言知识(词汇、语法)和阅读技巧来理解本专业或一般的英语书面材料”。
为帮助广大考生了解考试内容及题型设计，并顺利通过考试，天合教育职称外语考试研究中心深入研究了历年职称英语考试大纲和真题，组织大连外国语学院等名校的专家、学者，立足考试，开拓创新，编写了这套《职称英语考试历年真题及全真模拟试卷》(综合类、理工类、卫生类)。该套试题为《2011年全国专业技术人员职称英语等级考试系列用书》(综合类、理工类、卫生类)中的一部分。各类别的试卷由2008、2009、2010年的C级、B级和A级九套真题以及C级、8级和A级六套全真模拟题组成。
本套图书有以下特点：
真题再现，丰富、完整，全面展现题型特点及高频考点：该套试题收纳了近三年的考试真题，为考生全面展现出近年来的命题规律及高频考点、热点，使考生真正做到有的放矢，从容备考。
答案解析详尽透彻，总结考点、分析重点、化解难点：九套真题均配有详细的试题解析，各题型不仅配有试题题目的翻译，而且增加了对各选项之间的区分讲解，重点词汇辅以典型例句和译文。历年真题的透析，让考生真正把握试题规律，领悟解题技巧，掌握学习方法。
模拟试题精炼适用，收纳考试热点、预测命题趋势：精选的六套模拟题预测了2011年考试的方向，涵盖了近年考试的热点考点，犹如真题再现，保证了考生学习的针对性和高效性，使考生在较短的时间内取得最大的学习收获。
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