富锦楼将跟大家是介绍关于英语职称考试真题的，希望可以帮你解惑。
国家电网公司组织的专业技术人员电力英语和计算机水平考试，他们分别的难度如何
不难。
整个测验的难度，自然取决于组成测验的各个项目的难度。根据测验总分的分布，可以知道整个测验的难度。如果测验难度适当，则标准化样本的测验分数，应该大致为正态分布。
若测验难度不当，测验分数可能出现两种典型的偏态分布。一种是正偏态分布，分数集中在低端。这表明测验太难，缺乏足够数量的较易项目，本来应该在正态曲线的左端分布范围较大的被试，在这个项目上得零分或接近零分。测验因此不能区分能力水平低端的被试。
另一种是负偏态分布，分数集中在高端。这表明测试太易，缺乏足够数量的较难项目。本来应该在正态曲线右端分布范围较大的被试，在这个项目上得满分或接近满分。测验因此不能区分能力水平高端的被试。
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
国家电网公司组织的专业技术人员电力英语和计算机水平考试，他们分别的难度如何
不难。
整个测验的难度，自然取决于组成测验的各个项目的难度。根据测验总分的分布，可以知道整个测验的难度。如果测验难度适当，则标准化样本的测验分数，应该大致为正态分布。
若测验难度不当，测验分数可能出现两种典型的偏态分布。一种是正偏态分布，分数集中在低端。这表明测验太难，缺乏足够数量的较易项目，本来应该在正态曲线的左端分布范围较大的被试，在这个项目上得零分或接近零分。测验因此不能区分能力水平低端的被试。
另一种是负偏态分布，分数集中在高端。这表明测试太易，缺乏足够数量的较难项目。本来应该在正态曲线右端分布范围较大的被试，在这个项目上得满分或接近满分。测验因此不能区分能力水平高端的被试。
