英文科技论文写作_北京理工大学中国大学mooc课后章节答案期末考试题库2023年

大数据技术导论_北京理工大学中国大学mooc课后章节答案期末考试题库2023年1.大数据是一个什么领域的问题？答案:多学科综合领域2.以下哪种技术对大数据技术的发展起了最重要基础支撑作用？答案:云计算技术3.科学研究的第三范式是计算思维-()答案:仿真模拟4.与大数据直接相关的职业不包括答案:首席执行官5.下面科学研究的四个范式顺序正确的是（）答案:经验范式-理论范式-模拟范式-数据密集型范式6.常见的分布式网络爬虫架构不包含（）答案:Master-worker7.以下哪项不是传统关系型数据库的弱点？答案:无法满足数据一致性和完整性的需求8.HBase是一种（）数据库答案:列式数据库9.访问HBase表中的行，不可以用以下哪种方式答案:通过某列的值区间10.HDFS中文件块默认保存几份（）答案:3 份11.下面与HDFS类似的框架是（）答案:GFS12.下列关于NoSQL数据库和关系型数据库的比较，不正确的是答案:NoSQL数据库很容易实现数据完整性，关系型数据库很难实现数据完整性13.下列数据库属于文档数据库的是答案:MongoDB14.NoSQL数据库的CAP不包含（）答案:持久性15.NoSQL数据库的BASE不包含（）答案:持续性16.关于NoSQL数据库和关系数据库，下列说法不正确的是：答案:NoSQL数据库和关系数据库各有优缺点，但随着NoSQL的发展，终将取代关系数据库17.下列关于数据可视化的介绍，不正确的是（）答案:雷达图不适用于多维数据18.下列不可以用于多维数据可视化的方法有（）答案:GMap19.数据度量的常用方法不包括：答案:聚类系数20.Spark的组件中，用于做查询分析的是（）答案:Spark SQL21.关于MapReduce，下列说法错误的是答案:Hadoop框架是用Java实现的，MapReduce应用程序则一定要用Java来写22.传统并行计算框架（比如MPI）和MapReduce并行计算框架相比较的特点不包含答案:前者相比后者学习起来更容易23.关于RDD论述正确的是（）答案:RDD提供一种高度受限的共享内存模型，是一个弹性分布式数据集24.Apache软件基金会最重要的三大分布式计算系统开源项目不包括（）答案:MapReduce25.以下哪项对数据隐私问题的影响相对最小答案:政府和企业成立安全联盟26.科学研究的第一到第四范式数据思维依次分别采用：仿真模拟、模型推演、关联分析、科学归纳答案:错误27.大数据处理中的批处理框架包含Flink、hadoop、jvm、Spark答案:错误28.系统的控制方式一般分为模型驱动和数据驱动答案:正确29.4V特征包含：数据规模大、数据密度低、数据处理速度快、价值密度低答案:错误30.模拟范式是以数据考察为基础，联合理论、实验和模拟一体的数据密集计算的范式答案:错误31.全表对比是一种需要计算MD5校验码的非增量抽取方法答案:错误32.大数据中的非结构化数据包括视频、图像、语音、文本答案:正确33.电子表格Excel、网页HTML均属于结构化数据答案:错误34.HBase依靠Hadoop存储底层数据答案:错误35.在分布式文件系统中，采用采用多副本冗余存储可以节约存储空间、保证数据可靠性、更容易检查数据错误并加快数据传输速度答案:错误36.分布式文件系统改变了数据存储和管理方式，相对于本地文件系统具有易扩展、低成本、强可靠、高可用的优势答案:正确37.Hadoop的框架最核心的设计是HDFS和MapReduce答案:正确38.HDFS 专为解决大数据存储问题而产生的，其具备了强大的跨平台兼容性，支持批和流数据读写，实现了低延时数据访问，并兼容廉价的硬件设备答案:错误39.目前，NoSQL的含义是“Not only SQL”，而不是“No SQL”。

英语技术写作MOOC单元测试英语技术写作单元测试紫邪超过提交次数还能做：“已经超过规定的测试次数或提交截止时间已过。

你可以作为自我学习进行测验，但提交的结果将无法获得学分。

”Test 11、单选（每题2分）1、Which of the following is not one of the features of technical documents?（D）A. Readable styleB. Clear organizationC. Effective visualsD. Writer-centeredness2、One of the purposes of technical writing is to enable people to perform a task or follow a procedure, that is, to __________ your readers.（不选C，选D）A. suggestB. persuadeC. informD. instruct3、When writing a technical document, keep two audiences in mind. Most documents are geared to an immediate audience of readers. This is your __________ audience.（B）A. semitechnicalB. primaryC. nontechnicalD. secondary4、________ are those with no specialized training, who lookfor the big picture instead of complex details. They expect technical data to be translated into words most people understand. （D）A. AudiencesB. ExpertsC. Informed personsD. Laypersons5、The most emphatic location in a pragraph is the __________ sentence. （C）A. middleB. lastC. firstD. second6、__________ is like trying new paint: you do not know whether you like the color until you see it on the wall. （C）A. EditingB. RevisingC. DraftingD. Planning7、The purpose of my document is to __________ company employees of the new absentee policy and to __________ them on how to follow the procedures properly. （C）A. instruct; persuadeB. suggest; informC. inform; instructD. persuade; suggest2、填空（每题3分）8、In most of your writing, you will carry out the task in a process consisting of five steps: planning, drafting, revising, editing and __________.proofreading9、Assessing your audience’s technical background is essential before deciding whether your document should be highly technical ___________, or nontechnical.semitechnical10、Clear writing means that the sentences can be understood in __________ reading.one11、Actually almost every day, we make decisions or take actions that depend on ____________ information.technical12、To help your audience spend less time reading, you must spend more time __________ for a style that is clear, concise, fluent, and appropriate in tone.revisingTest 21、单选（每题2分）1、The principle of __________ means that related items should be grouped together. （B）A. repetitionB. proximityC. contrastD. alignment2、The principle of __________ is that you should treat the same kind of information in the same way to create consistent patterns. （B）A. proximityB. repetitionC. contrastD. alignment3、The principle of __________ works in several different ways in technical documents, such as large type with small type, a cool color with a warm color, and etc. （D）A. alignmentB. repetitionC. proximityD. contrast4、The principle of __________ is what tells the reader that the invisible line connecting the text is much stronger. （B）A. proximityB. alignmentC. repetitionD. contrast5、We often use __________ tables to compare exact values. （D）A. summaryB. proseC. appendixD. numerical6、__________ charts are used to depict how the phases of a project relate. （D）A. OrganizationB. PieC. TreeD. Gantt7、Which of the following is serif typeface? （A）A. Times New RomanB. HelveticaC. ArialD. Tahoma2、填空（每题3分）8、The four basic principles of __________ are proximity, alignment, repetition and contrast.design9、All typefaces are divided into two broad categories: serif and __________ serif.sans10、Headers and __________ appear in the top and bottom page margins, respectively to provide chapter or article titles, authors’ names, dates, or other publication information.footersTest 31、单选1、Which of the following is the most suitable way for communication between people within an organization? （C）A. MicroblogsB. MessagingC. MemoD. Emails2、Which of the following is NOT a reason for using moderately formal tone for workplace communication? （C）A. Your documents may appear in a court of law.B. Your documents are legally the property of the organization for which you work.C. Your documents will be read by people on the move.D. Your documents may be read by your boss.3、Which of the following may hinder goodwill and communicate ineffectively? （C）A. Concise language.B. Logical organization.C. Sloppy appearance.D. Conventional format.4、Text messages can（B）A. increase intimidationB. allow the writer to deal with more than one taskC. attach other filesD. save more time compared with telephone call5、Text messages may have some potential problems EXCEPT （B）A. lost productivityB. easy documentationC. security issuesD. employee misuse6、Which of the following statements is FALSE? （C）A. Abbreviations can help build rapport among colleagues.B. Abbreviations can help people exchange information quickly.C. Abbreviations can be used to avoid misunderstanding.D. Abbreviations can be used when the readers can understand such abbreviations.7、Which of the following is NOT an advantage of email? （C）A. Email provides a company with extensive records for future reference.B. Email is useful when people are in different time zones.C. Email is very formal, including detailed attachments for professionals.D. Email can be easily stored and forwarded.8、Which of the following is the best subject line? （A）A. Inquiry about Sunday TrainingB. HelloC. IT’S IMPORTANTD. How are you?9、If you want to convey your messages effectively, you should（C）A. communicate more with high-tech readersB. establish friendship with your readers in advanceC. put the readers’ levels of k nowledge into considerationD. follow the email policy of the company your reader is working with10、Which of the following is NOT a key point in memos? （A）A. Complimentary closing.B. Discussion.C. Introduction.D. Identification lines.11、Which of the following can make the memo more reader-friendly? （C）A. Graphics.B. Boldfacing.C. All of the above.D. Headings.12、If you want to write an effective memo, you should NOT （C）.A. keep it brief and to the pointB. use visuals to display informationC. address more than one topicD. provide sufficient informationTest 41、判断题（每题2分）1、In a chronological résumé, what is most recent should belisted last. （×）2、In a functional resume, sections are presented in priority order—from least important to most important. （×）3、Skills summary should be placed early in the resume to make your major qualifications stand out. （√）4、A person with limited work experience should write his/her resume in the following order: Contact information –Objectives – Experience – Education – Professional memberships and affiliations - Certifications – Skills - Awards and honors. （×）5、A chronological resume clearly shows an applicant’s education and career development over time. （√）6、One of the purposes of a cover letter is to provide more details for the information in your resume. （×）7、A recent graduate might want to present his/her education before the work experience in the cover letter. （√）8、In the education paragraph of a cover letter, an applicant should discuss all the skills and knowledge he/she has gained from the university or college. （×）9、In the employment paragraph of a cover letter, an applicant should explain how the special skills gained from his/her previous work experience make him/her well-suited for the position he/she is applying for. （√）10、In the Objective section, you only need to state in which field you'd like to work. （×）11、Passive voice is usually used in describing positions or responsibilities in a resume. （×）12、The line spacing between items is important because it can make your resume appear clearly organized. （√）13、Sentence fragments are not allowed in a resume. （×）14、You use present perfect tense for jobs you held andpresent tense for jobs you currently hold. （×）15、Some applicants write a summary in the beginning of a resume to summarize all that he is writing in the following sections. （×）Test 51、判断题1、Instructions spell out the steps required for completing a task or a series of tasks. （√）2、If the instructions are for the technicians, plain language and a glossary for specialized terms are really necessary. （×）3、Leaving out some articles, some pronouns and some verbs can make the instructions short and brief, but somewhat difficult for readers to understand. （√）4、A title page must consist of the topic, contact information, warranties and a graphic. （×）5、Compared with numbers, bullet points and letters are better choices for helping readers locate steps. （×）6、Positive words, such as “Thank you” and “pleasure” may help achieve positive customer contact. （√）7、The imperative mood is often used in writing instructions, because it is more direct and economical. （√）8、It is necessary to ask someone to test the accuracy of the instructions and clarity of the steps. （√）9、The best policy to deal with potential dangers in writing instructions is to state disclaimers clearly. （×）10、“Caution” is used to alert readers about serious injury or serious damage to equipment. （×）11、Put safety information wherever you think the reader is likely to see it; sometimes a reasonable amount of repetition is effective. （√）12、Compound-complex sentences can keep readers focused on one step at a time, while short words, short sentences, and short paragraphs may create confusion. （×）Test 61、单选1、A(n) ____________ is a persuasive document that offers a solution to an identified problem or need. （A）A. proposalB. resumeC. instructionD. email2、In the __________ of proposals, you should demonstrate the need for the project, your qualifications for tackling the project, and your clear understanding of what needs to be done and how to proceed. （D）A. bodyB. appendixC. conclusionD. introduction3、In the __________ of proposals, you should reemphasize need and feasibility and encourage action. （A）A. conclusionB. bodyC. appendixD. introduction4、The __________ proposal seeks money from a government agency, foundation, or other funding source for a specified project. （A）A. grantB. salesC. planningD. research5、RFP is the short form of __________ for a Proposal. It outlines the proposal requirements and represents the first stage of creating a proposal, that is, analyzing the RFP. （C）A. RequisitionB. RequirementC. RequestD. Recruitment6、The __________ proposal asks for approval to begin a study or an investigation. （A）A. researchB. planningC. grantD. sales2、判断题7、Unsolicited proposals are those that have been requested by the audience. （×）8、Persuasiveness is the soul of a proposal. （√）9、Proposal often follow an introduction/body/conclusion structure. （√）10、A persuasive proposal might not be a readable one. （×）11、Exaggerated promises in persuasive proposals will not damage reputations. （×）12、The benefit list should show that you understand what readers will gain by adopting your plan. （√）Test 71、单选1、A(n) __________ report is a written answer to a problem ora need that arises in the workplace. （C）A. activityB. feasibilityC. recommendationD. progress2、__________ section is the most important part of a report where the writer clarifies and explains the significance of the results. （C）A. IntroductionB. ScopeC. DiscussionD. Options3、The writer explains why each criterion was chosen and why they are ranked as they are in the __________ section. （B）A. optionsB. scopeC. discussionD. introduction4、Which of the following is an analytical report? （B）A. Activity reportB. Feasibility reportC. Trip reportD. Progress report5、__________ reports answer t he question “Here’s what we should do and why”. （D）A. InformationalB. FeasibilityC. ProgressD. Recommendation6、Which of the following is NOT included in the front matter of a report? （D）A. Table of contentsB. Letter of transmittalC. AbstractD. Glossary7、If you don’t have time to read an entire formal report, you can consult its __________ fora general picture of the report. （D）A. introductionB. letter of transmittalC. conclusionD. abstract8、Which of the following should be included in the table of contents? （C）A. letter of transmittalB. title pageC. works citedD. the table of contents itself9、Which of the following pages are NOT numbered except __________? （C）A. the title pageB. the back of the title pageC. the table of contentsD. the back of the abstract10、The __________ refers to all the material and information preceding the text of the report. （B）A. back matterB. front matterC. abstractD. executive summary2、填空11、A __________ report is a document that describes what has been done and what is left to do on only one project.progress12、A progress report can take the following forms: letter, __________, email, or formal report.memo13、Activity reports and progress reports are similar because they both summarize activities over a specified period. But a(n) __________ report summarizes general activities of a work group over a specified time period.activity14、The __________ matter of a report may include supplementary material such as a glossary, appendices, and/or bibliography.back15、Use __________ numerals to number the report text pages.ArabicTest 81、单选1、__________ is considered primary data. （A）A. Your firsthand experience with a projectB. A printed copy of ISO standards for medical devicesC. Statistics about social media used in a published articleD. An existing brochure stored in the company’s content management system2、__________ is NOT considered secondary resource. （D）A. A published white paperB. An operating manualC. An online discussion forumD. Your interview transcript3、Which statement about citation is correct? （B）A. Both direct and indirect quotations require the use of quotation marks.B. Citation styles vary in different disciplines and fields.C. Technical writers can use up to three citation styles in one document.D. We should never cite a whole paragraph.4、While conducting an observation, which of the followings is NOT recommended? （D）A. Getting permission before the observation.B. Taking notes while on site.C. Keeping records of date, time of day, and duration of the observation.D. Informing everyone on side about your presence.5、While conducting an interview, which of the followings is NOT recommended? （A）A. Making comments and judgment when taking notes during the interview.B. Sending a thank-you email to the interviewee after your meeting.C. Chatting informally with the interviewee prior to the interview.D. Arriving the interview site a bit earlier than the appointment time.6、Repurposing is a strategy used in content management while dealing with an ongoingproject. Repurposing refers to the process of __________ when it is suitable to the current project. Repurposing can save time and resource.（D）A. receiving and storing informationB. planning and developing new contentC. researching and selecting materialsD. copying and converting existing content7、Why is it important to document sources correctly? （A）A. All of the choices.B. To avoid legal problems.C. To avoid ethical issues.D. To give credits to the original author.8、While creating technical documents, we should get permission or pay for the use of copyrighted sources except for: （B）A. internal useB. educational purposeC. non-commercial useD. international audience9、An engineering paper is most likely to follow: （C）A. APA styleB. MLA styleC. IEEE citation styleD. the Bluebook10、Which statement about plagiarism is NOT true? （B）A. Plagiarism is the theft of someone else’s intellectual property.B. Using a Weibo post without citation is generally acceptable because it is hard to trace the original source.C. Plagiarism is not acceptable in business, science, academia, or journalism.D. Technical writers don’t need to document common knowledge such as information that is widely known in the field.。

拳击入门_北京理工大学中国大学mooc课后章节答案期末考试题库2023年1.转体反应手靶练习，转体时身体重心可以（）？参考答案:控制重心不要起伏2.两人徒手步伐练习时应保持（）的距离。

参考答案:与开始时相同3.摇闪防守技术移动路线呈（）字形?参考答案:U字形4.左手直拳打持靶者（）手靶。

参考答案:左手5.后仰防守时双手收回（）位置?参考答案:下颌6.拳击预备姿势，两脚间距离？参考答案:与肩同宽7.前滑步时（）用力蹬地?参考答案:后脚脚掌8.勾拳技术适用于（）距离?参考答案:近距离9.打三拳组合拳时，始终有一只手放在（）位置防守?参考答案:下颌10.仰卧起坐手靶是提高（）控制能力的练习手段。

参考答案:核心区域11.左侧闪时身体重心移至？参考答案:左腿12.后仰防守主要是针对（）进攻时采取的防守技术?参考答案:直拳13.后仰反击，后仰距离（）为宜?参考答案:10厘米14.直拳手靶，持靶者靶位于（）。

参考答案:头部两侧15.移动手靶技术练习，要求（）出拳。

参考答案:移动同时16.摆拳击打路线为（）击打。

参考答案:弧线17.向左侧闪躲后反击应先出（）？参考答案:左手摆拳18.下潜反击手靶击头练习，应（）反击。

参考答案:起身后再反击19.后仰反击手靶练习，应后仰（）反击。

参考答案:回位同时20.攻防手靶包括进攻、防守、再（）。

参考答案:反击21.徒手空击练习的目的（）？参考答案:丰富战术头脑和想象力22.攻防手靶包括进攻、防守、再（）参考答案:反击23.两人徒手侧闪反击练习是为了提高（）？参考答案:防守能力和反击能力24.摇闪反击拍肩练习应注意（）？参考答案:先摇闪，在起身的同时反击25.阻挡防守反击时，反击拳路线（）？参考答案:不宜过大26.勾拳击打时，持靶者靶位应放在（）？参考答案:腹部正前方27.两人徒手攻防练习时，进攻方应向（）出拳。

参考答案:头部方向28.击打手靶时用（）部位击打。

参考答案:拳峰29.摆拳击打发力的过程是（）参考答案:从外向内30.勾拳击打时，持靶者靶位应放在（）参考答案:腹部正前方31.左手直拳打持靶者（）手靶参考答案:左手32.单人徒手空击练习时，可以（）？参考答案:以上都对33.格挡防守主要是针对对方（）进攻？参考答案:摆拳34.格挡防守是一项先用（）格挡，再进行反击的防守技术。

人工智能之模式识别_北京理工大学中国大学mooc课后章节答案期末考试题库2023年1.采用非线性激活函数可以实现感知器解决非线性分类问题。

参考答案:错误2.下列关于最大池化的说法中错误的是？参考答案:LeNet采用的是最大池化方法3.填充树法由顶向底的方法和由底向顶填充相反。

参考答案:正确4.语言可以是无限的但是句子必须是有限的。

参考答案:正确5.文法是由下列哪些参数构成的？参考答案:起始符S_终止符V_T_非终止符V_N_产生式P6.感知器算法应用什么方法求解准则函数的最优值？参考答案:梯度下降法7.下列关于对比散度算法的说法中错误的是？参考答案:深度信念网中多层受限玻尔兹曼机同时通过对比散度算法完成预训练8.下列选项中，属于模式识别系统的环节是？参考答案:分类器训练_模式采集_分类决策_预处理与特征生成9.分类器函数的VC维h越大，将使下列选项中的哪些数据发生变化？参考答案:置信风险越大_结构风险越大_分类器泛化能力越差10.利用SVM将低维空间中的非线性问题映射到高维空间，存在哪些问题？参考答案:不确定需要映射到多少维的空间上，非线性问题才会转化为线性问题_如何找到合适的映射函数φ_增加计算量，可能会因为维数灾难无法解决11.本课程中介绍的与句法模式识别相关的基本概念有？参考答案:字母表_句子（链）_文法_语言12.下列选项中属于贝叶斯分类器的特点的是？参考答案:分类决策存在错误率_先验概率已知，以新获得的信息对先验概率进行修正13.贝叶斯分类器的训练，是从样本集数据中估计出____。

参考答案:类条件概率_先验概率14.下列选项中属于特征降维的优点的是？参考答案:降低模式识别任务的复杂度_提升分类决策的正确率_用更少的代价设计出更加优秀的模式识别系统15.下列说法中正确的是？参考答案:聚类结果受特征选取和聚类准则的影响_数据聚类没有预先分好类的样本集_聚类结果受各特征量纲标尺的影响_数据聚类没有已知的分类决策规则16.设计一个组合分类器需要满足什么要求？参考答案:每个基分类器的训练集和训练结果要有差异_组合分类器需要重点考虑方差和偏差_基分类器的分类正确率大于50%17.下列选项中属于决策树分类器的特点的是？参考答案:需选择分支后两个子节点纯度最高的特征作为一个节点的测试特征_速度快，分类决策规则明确_未考虑特征间的相关性_有监督学习方法18.下列选项中属于Adaboost算法的特点的是？参考答案:异常数据（离群点）影响大_不易实现并行化训练_只能解决二分类问题_算法的组合过程能减小偏差19.下列选项中属于反馈型神经网络的是？参考答案:Hopfield网络_受限玻尔兹曼机20.调节以下哪些部分可以对神经网络的性能造成影响？参考答案:权值_激活函数_隐层单元_阈值21.下列选项中关于前馈网络和反馈网络的说法中正确的是？参考答案:前馈网络输出不作用在网络的输入中_前馈网络为静态网络_反馈网络下一时刻的输出与上一时刻的输出有关_反馈网络为动态网络22.下列选项中属于BP网络的不足的是？参考答案:容易陷入局部极小值_全连接网络计算大_隐层神经元数量难以确定_无法做到深度很深，会产生梯度消失23.下列选项中属于深度学习的特点的是？参考答案:需要大量样本进行训练_逐层抽象，发现数据集的特征_是层数较多的大规模神经网络_需要大规模并行计算能力的支持24.利用链式求导法则需要哪些信息？参考答案:损失函数与网络输出向量之间的函数关系_激活函数输出对净激励的导数25.深度信念网不能用于图像识别的原因是？参考答案:深度信念网为一维向量输入，不能直接用于二位图像_需要进行认知－重构的双向计算，学习速度不够快_受限玻尔兹曼机的层间全连接，权值数量太多26.Jp作为类内、类间可分性的概率距离度量时应该满足下列选项中哪些条件？参考答案:当两类完全不可分时，Jp等于0_当两类完全可分时，Jp取得最大值27.特征选择的算法包括以下哪些？参考答案:分支定界法_顺序后退法_穷举法_顺序前进法28.特征降维的方法包括特征选择和特征提取。

管理运筹学_北京理工大学中国大学mooc课后章节答案期末考试题库2023年1.需求为随机的单一周期的报童问题是要解决（）的问题。

答案:期望损失最小2.在经济订购批量存储模型的灵敏度分析中，当订货费或存储率预测值有误差时，该选择何种存储策略（）。

答案:选择原最优存储策略3.下例错误的结论是（）答案:检验数就是目标函数的系数4.在报童所订购报纸的模型中，下列哪些不等式不符合最优数量 Q*求解的是（）。

答案:__5.【图片】的可行域是（）：答案:6.根据最大最大原则为以下问题选出最优行动方案？【图片】答案:S27.A工厂生产同一规格的设备，每季度的单位成本依次是1万元、1.2万元、1.3万元、1.5万元。

设备当季度卖出不产生任何存储、维护费用，若积压一季度需存储、维护费用0.05万元，则设备的单位费用（单位：万元）为：答案:8.存储论要解决的问题是：答案:何时补充物资。

_当需要补充物资时，补充的数量是多少。

9.根据动态规划的时间参量是连续的还是离散的、决策过程的演变过程是确定性的还是随机性的，可以将动态规划的决策过程分为哪些决策过程：答案:离散随机性_连续随机性_离散确定性_连续确定性10.下列成本中属于存储成本的是：答案:购买物资所用资金的利息。

_仓库管理人员的劳务费。

_储存仓库的费用。

11.对偶价格小于0时，约束条件的常数项增加一个单位，则对于求min目标函数的线性规划，其最优值的数值会增大。

答案:正确12.关于线性规划的最优解判定，说法不正确的是（）答案:求目标函数最大值时，如果所有检验数都小于等于零，则有唯一最优解13.求目标函数值最小的线性规划单纯形表的大M法，在约束条件中加入人工变量是（）答案:为了构造约束系数矩阵中的单位矩阵14.求解目标函数值最大的线性规划问题中，在确定出基变量的时，根据minbi/ aij选取入基变量的原因是（）答案:确保下一步迭代新得到的bj值都≥015.关于线性规划的原问题和对偶问题的关系，两个问题的最优解的值一致。

1.单选题(1.5分)Which one should not be including in writing scientific papers?•A Scientific attitude.•B Logics in presention.• Our own feelings and emotions.•D Authentic language.2.单选题(1.5分)If the readers want to know the result of the paper quickly, which part can they read?•A Introduction.• Abstract.•C Discussion•D The whole paper.3.单选题(1.5分)Which of the following translation is authentic?•注意安全---- take care.•B第一教学楼---- No.1 teaching building.•C小心落水---- fall into water carefully.•D投诉电话---- law suit phone number.4.单选题(1.5分)Which statement is CORRECT when we read work of others?•A Comment on other people's work with an offensive attitude.• Comment on other people's work when you think the other people's work is valuable to the academic community.•C Use the word like this is nothing but…•D We don’t need to be generous because every work has its shortcomings.5.单选题(1.5分)Which one is NOT the main factor when the reviewer determine whether to accept your paper?•A The contribution of your paper.•B The novelty of methodology.• The number of references you cite.•D The quality of your model.6.单选题(1.5分)Which statement is NOT CORRECT in problem descriptions or formulation section?•A If you have descriptions of the approach or algorithm, you put it here.• If you have simulation results or numerical results, you put it here.•C If you want to emphasize the novelty of your method, you describe the unique features of the method.•D In this section, you want to let the contributions of the paper stand out.Which one is CORRECT when you list the references?•A It’s ok if you put as many references as you can.•B To enrich your paper, you should can list something that is not referred to in your paper.• Every reference you list here must be referred in the main text.•D It’s proper for you to list many home made references.8.单选题(1.5分)What should you do if you want to show acknowledgment?•A It’s not appropriate to put acknowledgment in the front page.• You can put a separate section of acknowledgment in your paper.•C If you acknowledge Albert Einstein, you should thank him based on the fact.•D The length of acknowledgment should be strictly constrained.9.单选题(1.5分)Generally speaking, what does the proof reading mean?• It means your paper has been scheduled to published in the next issues and you need to return it promptly.•B It means your paper has many problems and you need to return it promptly.•C It means your paper has been published and you need to return it promptly.•D It means your paper has been returned.Which of the following is CORRECT about equations and variables.•A If you clearly know the meaning of a variable, it’s ok that it is not defined.•B It’s ok if the papers are full of equations and variables.• Usually the equations and the symbols only serve as shorthand for presentation.•D You can write the equations in the form you like randomly.11.单选题(1.5分)Which of the following author names may not be the right format of the reference?•A X. Guan, Zhang, S., S. Li, Wu Wang.•B Guan, X, Zhang, S., Li, S., Wang, W.•C Xiaohong Guan, S. Zhang, S. Li, Wang, W.• Guan Xiaohong, Zhang, S., S.Li, W.Wang.12.单选题(1.5分)Which statement is correct to response to reviews?•A "How can you be so stupid?"•B "You don't even understand this."• "Thank you for your advises, it deed help in my work ,but I think…..."•D "What do I mean by this?"Which description of the feature of the review system is CORRECT?•A The author knows the reviewer, but the reviewer doesn’t know the author.• The authors don’t know the reviewer, but the reviewer knows the authors.•C The reviewers know each other.•D The author knows the reviewer, and the reviewer know the author, too.14.单选题(1.5分)For one hour’s talk , about how long should you prepare for it?•A 30 minutes .•B About one hour .•C About two hours• 7.5hours or more15.单选题(1.5分)What is a good presentation?•A Use many beautiful animations, but the content is not fulfilled.•B The topic of your presentation is interesting in your aspect.• The subject of your presentation is welcomed by the audience.•D The words in your slide are of large size to make the audience look clearly.Which statement is correct?• Don't keep the laser pointer on all the time.•B In order to relax ,you can keep your hands in your pocket.•C It is ok that you just read the PPT from the screen.•D Using a monotone delivery and uniform emphasis is also ok.17.单选题(1.5分)Which statement is correct when facing a question that you don’t know the answer?•A Taking lots of time thinking on the stage.•B Saying” I don’t know and you can ask google”.•C Complain the question is not a good question.• Saying “I don't know the answer now, but I can do some little study and answer you offline.”18.单选题(1.5分)Which is NOT the correct statement in the following?•A You can prepare some slides for some expected question.•B You can take the questions in the rehearsal as pre-reviews.• ) You cannot say I don't know even if you don’t have an answer.•D You can offer the approach to finding the answer if necessaryWhich statement is correct?•A It is ok to list many homemade references.• It is ok to list many references that are published recently.•C It is ok to list 3 pages of references if your paper just have 6 pages.•D It is ok to list many references that are 20 or 30 years old.20.单选题(1.5分)What should you do when you present a paper?•A Prepare slides strictly according to the time limit•B Make presentation and answer questions politely•C Read program carefully, locate your session and be aware the time slot for presentation• All the above21.单选题(1.5分)What does “no show ”mean in the video?•A You don’t submit the final paper.• You submit a paper to the conference and you do not show up.•C Don’t show off when you make presentation.•D You don’t do a good presentation.How long should the author usually spend on presenting the paper?•A About 2 or 3 minutes.• About 15 to 20 minutes.•C About an hour.•D About two hours or more.23.单选题(1.5分)When should we meet session chair ?• At author’s breakfast or just before the session•B At poster sessions.•C During other’s presentation.•D Just at any time.24.单选题(1.5分)Which part mainly determine the contributions of the paper?•A Validity or correctness of the method.• Originality or creativity of the concept.•C Clarity of the writing.•D Suitability of the readershipAs an AE, what information should you get after glancing over the paper?•A What the paper about.•B Its potential contributions.•C Who are other leading researchers in the area.• All the above.26.单选题(1.5分)How long should you spend on completing the review?•A One week.•B Two weeks.• Four to six weeks.•D Ten weeks or more.27.单选题(1.5分)What information should you give authors if you want they to revise?•A which parts to cut•B how the paper should be reorganized•C how the paper should be revised.• All the above.What are the tasks of a conference session chair ?•A Meeting the authors either in author's breakfast or just before the session.•B Introducing the authors.•C Controlling the presentation time and follow the schedule.• All the above.29.单选题(1.5分)In some conferences, What do you need to report to the program committee •A How many papers are presented•B Anyone no show•C How the session goes.• All the above.30.单选题(1.5分)Which disciplines contribute to “Quantum Informatics”?•A Information &Transportation.•B Information& biology.•C Information& chemistry.• Information& physicsWhen writing proposals, we should concentrate on the reviewers’ side.•正确•错误32.判断题(1.5分)If you find out there are several authors no show, you can say” Let me combine the session with somebody else, who is unsigned”.•正确•错误33.判断题(1.5分)A paper is usually reviewed by one reviewer.•正确•错误34.判断题(1.5分)To make it easier , you can send emails to all the reviewers simultaneously.•正确•错误35.判断题(1.5分)If you find the paper is really interesting, can you say, "I know the paper have not been published yet, so I can directly use the information?"•正确•错误36.判断题(1.5分)Serving as a reviewer can help you develop the capability of critical reading and providing critic reviews.•正确•错误Validity or correctness of the method .means whether your paper fits this conference or journal.•正确•错误38.判断题(1.5分)Plenary and keynote speeches are very important because it often discusses the future development and research directions.•正确•错误39.判断题(1.5分)In poster sessions, you can just leave the poster at designated area and hang out•正确•错误40.判断题(1.5分)When making a poster, printing out your PPT is also a good choice.•正确•错误41.判断题(1.5分)For your own paper, there is no need to ask for permission from publisher if you want to reuse the graph and picture of this paper.•正确•错误To make it easier, you can just list the one and use “et al” for the other if the reference paper have five authors.•正确•错误43.判断题(1.5分)In order to prepare a good presentation, you can record your talk and then rehearse and practice.•正确•错误44.判断题(1.5分)The pronunciations in slides is not very important so we can slur them.•正确•错误45.判断题(1.5分)In order to enhance performance, you should use slides as many as possible.•正确•错误46.判断题(1.5分)Don’t use too many variables and notations ,or the audience would forget.•正确•错误47.判断题(1.5分)If you use a circle to present something , you also could use it to present another thing in the same talk.•正确•错误If you have much information to show , it is ok to make a slide too crowded.•正确•错误49.判断题(1.5分)To make it easier ,it is ok to copy texts form your thesis to the slide directly.•正确•错误50.判断题(1.5分)The reviewer may wonder whether you understand recent development if you use many references 20/30 years ago.•正确•错误51.多选题(2.5分)In order to write good paper , what should be included in your work ?• Theoretic investigation.• Experiments.• Numerical testing.• Simulation.What information should the title show?• The contribution of the paper.• The unique features.•C The structure of the paper.• The core ideas.53.多选题(2.5分)What should you pay attention to in writing?• Avoiding direct translation.• Writing simple sentences if you are not influent in English.• Using software to do spelling check and grammar check.• Checking the spellings of names in references.54.多选题(2.5分)Which statements are correct ?• Never argue with reviewers and editor.• You should know when to give up for a particular paper worthwhile for no more efforts.• If the paper is rejected, you should make more effort, get more results and add them to the content of the paper, and write the new paper.•D If you decide to give up a particular paper ,you can argue with reviews or editors to show your anger.Which parts does a slide usually conclude?• Title.• Text.• Graphs and tables.• Images.56.多选题(2.5分)What should you do in Q&A?• Answer audiences’ questions politely.•B For simple questions, you can say ”the question is so easy and you should ask google”.• Deflect the answer to the point you want to emphasize for irrelevant questions• Admit and/or offer the approach to finding the answer, or offer answers later if no answer57.多选题(2.5分)Why it is important to share credit?• Because it is the basis for free sharing the idea and respect for the intellectual property right of scholars.• Because there is a harsh punishment for plagiarism.• Because it can help to develop credible intellectual atmosphere.• Because it can protect the right of scholars.Which statements are correct?• You can just participate the sessions you are interested in.•B You must participate all sessions• You should ask question appropriately and make comments politely.• You can choose one or two committee to participate.59.多选题(2.5分)Which parts should be included in rating scales ?• Originality or creativity of the concept.• Validity or correctness of the method.• Clarity of the writing.• Suitability of the readership60.多选题(2.5分)Which disciplines are included in “Micro sensor and wireless sensor networks”?●Biology.●Mechanical engineering●Information.●Physics & chemistry.。

大数据基础与应用_北京理工大学中国大学mooc课后章节答案期末考试题库2023年1.大数据的特性不包括答案:分布地域广2.Kafka 是一个高吞吐、分布式、基于发布订阅的消息系统，利用Kafka技术可在廉价PC Server上搭建起大规模消息系统。

答案:正确3.网络和层次化数据可视化的主要技术有力导图和TreeMap。

答案:正确4.如下关于大数据分析流程的哪一项是正确的？答案:数据采集、数据清洗、数据管理、数据分析、数据呈现5.大数据分析与传统的数据分析的区别主要在于：答案:大数据分析的对象是大规模类型多样的海量数据，使用的模型较为复杂；而传统数据分析则作用在有限的小规模数据集上，模型较为简单。

_传统数据分析主要是描述性分析和诊断性分析，而大数据分析主要是预测性分析。

_大数据分析主要是为了发现新的规律和知识，而传统数据分析主要是为了了解正在发生的事件及其原因。

6.1、大数据主要是由于数据规模巨大、来源分散、格式多样，所以需要新的体系架构、技术、算法和分析方法来对这些数据进行采集、存储和关联分析，以期望能够从中抽取出隐藏的有价值的信息。

答案:正确7.数据科学家主要负责开发、构建、测试和维护系统，比如数据库和大规模处理系统答案:错误8.大数据分析的目的是从类型多样的海量数据中挖掘出隐藏的有价值的信息。

答案:正确9.大数据分析能够应用在哪些领域？答案:交通医疗足球零售天文政治10.Hive的数据模型主要包括：答案:表（Tables）_桶（Buckets）_分区（Partitions）11.NoSQL数据库的主要类型包括：答案:图形数据库_键值数据库_文档数据库_列族数据库12.下列数据类型中，不属于Python内置数据类型的是：答案:dtype13.以下不属于高维数据可视化技术的是.答案:词云14.以下哪个是常见的大数据处理流程.答案:数据获取、数据清洗、数据分析、数据可视化15.测得一组身高（cm）数据如下：176、165、173、168、176、180、177、168、174、176，则其众数和中位数分别是：答案:176, 17516.数据清洗的方法不包括答案:数据可视化17.以下哪个不属于分布式文件系统HDFS的特有特性答案:随机读写18.以下哪种方法不属于预测性（有监督学习）模型答案:关联分析19.Apriori算法的加速过程依赖于以下哪个策略答案:剪枝20.Spark是使用以下哪种编程语言实现的？答案:Scala21.大数据分析与传统数据分析的不同之处在于答案:大数据分析是预测性分析22.对字符串中某一子串执行replace（）操作后，再次对其进行一次输出，则输出结果与原字符串答案:一定相同23.请计算下列数据{10,12,16,18,22,35,45,50,90,100}的p=40%的截断均值_____答案:3124.过拟合指的是（）答案:模型在训练集上表现的很好，但是在交叉验证集合测试集上表现一般25.决策树的生成由两个阶段组成：_____、______答案:判定树构建树剪枝26.假设有四个样本分布在坐标系中，已知A区两点分别（2,5）和（1,4），B区（8,1）和（9,2），若使用KNN算法（距离使用欧氏距离【图片】），求M（4,3）属于哪一区？答案:A27.以下关于日志采集工具Flume的说法不正确的是：答案:Flume适用于大量数据的实时数据采集28.以下关于数据分发中间件Kafka的说法不正确的是：答案:Kafka主要是使用c++、Java语言实现的29.以下关于分布式文件系统HDFS的说法不正确的是：答案:HDFS支持多用户写入，任意修改文件30.HDFS集群中管理文件系统的元数据、负责客户端请求响应的节点是：答案:NameNode31.HDFS（Hadoop 1.X版本中）默认的块大小是：答案:64 MB32.以下关于分布式数据库HBase的说法不正确的是：答案:HBase比传统关系数据库系统具有更加丰富的数据类型33.已知p = np.arange(20).reshape((4,5))，则p[3][2]的值是。

北京理工大学网络教育期末考试大学英语二3大学英语二-2005-0003 (题目数量：29 总分：100.0)1.单选题(题目数量：20 总分：40.0)1. She’s been reported missing and we’re checking her movements for the two weeks before she ## .A.vanishedB.survivedC.observedD.revealed答案:A2. —Tom told me that you collect stamps. —##.A.at do you mean?B.I don't think so.C.Why did he tell you?D.Yes, I do. Do you?答案:D3. “Is there anything in your personal life which would ## the party if it became public?”A.embarrassB.disturbC.wakenD.involve答案:A4. They provide information on methods to improve the ## training programs for older workers, including helping older workers to find productive employment.A.formationB.efficiencyC.selectionD.dignity答案:B5. If you don’t read, then ## you will forget how to read.A.mysteriouslyB.unfortunatelyC.positivelyD.eventually答案:D6. —Could you tell me where the nearest parking lot is? —##A.Don't ask me.B.Parking is very difficult.C.Sorry, I'm a stranger here.D.Sorry, you can't park here答案: C7. Burns can be caused when skin that isn’t used to the sun is ## to short bursts of strong sunlight.A.exposedB.snappedC.wrinkledD.revealed答案:A8. —David injured his leg playing football yesterday. —Really? ##?A.Who did thatB.What’s wrong with himC.How did that happenD.Why was he so careless答案:C9. He could see her lips ## and hoped she would not cry in public again.A.disturbingB.tremblingC.shakingD.stooping答案:B10. —Is it OK if I take this seat? —Sorry, ##.A.here you areB.take itC.it’s takenD.never mind答案:C11. Early in the morning, I was ## out of bed to repair a minor fault on the car.A.distractedB.draggedC.wakenedD.assigned答案:B12. A sob caught his throat and he coughed to ## it.A.prohibitB.maskC.emitD.crash答案:B13. —Bring me the bill, please. —##.A.You are welcomeB.Please wait for a moment, sirC.I'll hurry upD.Be quick答案:B14. As anyone who has ## an accident will tell you, the apparent security of cars is deceptive.A.sampledB.survivedC.vanishedD.Scraped答案:B15. Drinking a cup of hot water should help to ## the pain in the short term, but, if it persists, you should see a doctor as soon as possible.A.fortifyB.shiftC.wrapD.relieve答案:D16. “We have monitored in the area and there is no ## to health,”she said.A.suggestionB.hazard/doc/3c14543804.htmlplimentD.recipe答案:B17. —Thanks for the lovely party and the delicious food. —##.A.No, thanks.B.Never mind.C.Thank you for coming.D.That's all right.答案:C18. —Hey, Linda. You look so pale. What's the matter? —##?A.Thank you.B.Are you OK?C.I'm just getting over the flu.D.I'm feeling well.答案:C19. —Are you going on holiday for a long time? —##.A.It was a long timeB.Two weeks agoC.No, only a couple of daysD.Not long time ago答案:C20. We had decided that our last day would be spent ## one of the many activities which the hotel offered to arrange.A.consolidatingB.samplingC.proceedingD.selecting答案:B2.阅读理解(题目数量：1 总分：15.0)1. A study suggests that dirty air can reduce lung development. Researchers at the University of Southern California in Los Angeles published their work in the New England Journal of Medicine.About one thousand seven hundred children from different communities in Southern California took part in the study. The scientists tested the children every year for eight years, starting at age ten. They say this is the longest study ever done on air pollution and the health of children.The scientists found that children who lived in areas with the dirtiest air were five times more likely to grow up with weak lungs. Many were using less than eighty percent of normal lung strength to breathe.The damage from dirty air was as bad as that found in children with parents who smoke. Children with reduced lung power may suffer more severe effects from a common cold, for example.But the researchers express greater concerns aboutlong-term effects. They say adults normally begin to lose one percent of their lung power each year after age twenty. The doctors note that weak lung activity is the second leading cause of early deaths among adults. The first is smoking.By the time people are eighteen, their lungs are fully developed, or close to it. The doctors say it is impossible to recover from any damage.Researchers say they are still not sure how air pollution affects lung development. They believe that pollution affects the tiny air spaces where oxygen and carbon dioxide are exchanged.Arden Pope is an economics professor at Brigham Young University in Provo, Utah. Professor Pope wrote a commentary about the study. He noted that air quality in Southern California has improved since the study began in the early nineteen-nineties. Clean-air laws have reduced pollution from vehicles, industry and other causes.But dirty air is still a problem in areas of California and other places. Professor Pope says continued efforts to improve air quality are likely to provide additional improvements in health.答案:3.完型填空(题目数量：1 总分：20.0)1. While I was waiting to enter university, I saw an advertisement in a newspaper–a teaching job wanted at a school about ten miles from where I lived. Being very short of money and wanting to do something useful, I applied, fearing as I did so, that without a degree and with no of teaching my chances of getting the job were .However, three days later, a letter arrived, calling me to Croydon for a meeting with the headmaster. It was clearly the himself that open the door. He was shout and round. "The school," he said, "is made up one class of twenty-four boys between seven and thirteen.”I should have to teach all the subjects except art he taught himself. I should have to divide the class into groups and teach them in turn at three different . And I was not glad at the thought of teaching maths, a subject at which I wasn’t very at school. Worse perhaps was the idea of to teach them on Saturday afternoon because most of my friends would be enjoying themselves at that time.Before I had time to ask about my salary, he got up to his . "Now," he said, “You’d better meet my wife. She is the one who really this school.”答案:4.判断题(题目数量：5 总分：5.0)1. Jim's friends said that the noise pollution in their city was terrible, but they had to live with it. 译为：吉姆的朋友说他们那个城市的污染严重，但是他们只好住在那里。

英文学术写作实战_北京大学中国大学mooc课后章节答案期末考试题库2023年pare the following statements, and indicate which is the most academicversion:答案:First, we investigated whether a spider protein can be expressed in goat milk.2. Which of the following statements contain a lazy verb:答案:To have a complete view of RNA methylation profiles, we quantified themethylation content in various adult mouse tissues.3.你认为下面哪句话，属于摘要中对研究发现意义的探讨？答案:Together, the module and survey results confirm the need to include suchinquiry-based activities into the higher education classroom, thereby helping students hone their critical thinking and question asking skill set andfacilitating their professional development in astrobiology.4.以下哪个结构是本单元提倡的摘要结构和呈现顺序？答案:General Introduction- More detailed Background- Question/Gap in theliterature- Method- Results/Solutions- Conclusions/Summary/Assessment of Solutions5.According to the description listed below, choose the right readers.* Read the methods section and anything else that helps them finding asolution;* Big knowledge gap;* Possibly readers from a different area, looking for a method that can beused in their area;* Looking for clear introduction with many references.答案:The solution seeker6.Analyze the following statement, and then choose one of the options that youthink is best to use in academic writing:Adoption of this method is therefore of critical importance.答案:It is critical to adopt this method.7.Analyze the following statement, and then choose one of the options that youthink is best to use in academic writing:Detailed assessment of the transfer verification process is crucial.答案:Assessing the process involved in transfer verification in more detail iscritical.8.你认为下面哪句话，应该出现在摘要的第一句？答案:Innovation, defined as creativity with a purpose, is widely considered to be the engine of scientific progress.9.针对下面句子关于style的改写，哪个是正确的？There are some studies that have concluded that bamboo could be used by builders more widely than it is now as a construction material.答案:Recent studies have shown that bamboo is a suitable construction material, suggesting its wider use in the building industry.According to a number of recent studies, it is feasible to increase the use of bamboo in the construction industry.10.针对下面句子关于style的改写，哪个是正确的？OK, what are the reasons that coffee prices have fallen? There're a lot ofpossibilities.答案:A number of reasons may explain the decrease in the price of coffee.Several reasons are responsible for the falling price of coffee.A number of reasons may explain as to why the price of coffee has decreased.11.How can subheadings help the authors?答案:Help collaborating authors discuss and agree on the structure of the articleHelp authors stay on topic and avoid digressionHelp authors have clear writing structure during the writing stageHelp authors achieve contextual consistency in writing12.How to bridge the gap of knowledge between you and your readers?答案:proceed from the elementary to the profound.provide research background.set target readers.pay attention to the logic flow, so that the paper can be more comprehensive.13.以下哪些行为属于学术不端行为？答案:将同一研究结果提交多个出版社机构出版或提交多个出版物发表将作出创造性贡献的人排除在作者名单之外将本质上相同的研究成果改头换面发表14. Identify which two sentences listed below contain weak and hedgingexpressions:答案:It may be necessary for the spider to leave the branch on which it is standing, climb up the stem, and walk out along another branch.There is experimental work to show that a week or ten days may not be long enough and a fortnight to three weeks is probably the best theoretical period.15.Choose all the weak and hedging expressions in the following paragraph:There are many explanations for why musicians have superior cognitiveabilities to non-musician controls. First, it is possible that only the moreintellectually rigorous people continue with music training once they have been exposed to it. Practicing a musical instrument takes a tremendousamount of discipline. Individuals who are willing to work that hard may also work hard in academic settings, thus improving their cognitive abilities.Secondly, socio-economic class could be playing a role. In a study comparing scholastic aptitude among musicians and non-musicians, Phillips found adifference in the two groups, but once socio-economic class was taken into account the difference nearly disappeared (Phillips, 1976). It is possible that the differences between musicians and non-musicians is actually innate or caused by something not musically related in the environment.答案:could bemanymayit is possible that16.一篇完整的摘要需要包涵下面哪些内容？答案:What do the findings mean?Why did you do this study?Where is the gap? How?What did you find?17.Analyze the following text for verb use:By applying for an internet loan, students give away their personalinformation. Internet lenders always want to get hold of national ID and student ID card numbers. They also want to get information about their parents, college teachers and/or classmates as contacts.The verbs used in this text indicate that this text was not written for an academic article.答案:正确18.Choose true or false according to the statement.——Method section is usually described with passive voice.答案:正确19.There is no mistake related to abstract nouns or noun strings in this sentence:Previous reports suggested the importance of Fe ions for the success of this treatment.答案:错误20.每一条writer's diet的反馈都是必须修改的，因为它指出的都是我的错误。

通用学术英语写作_中国政法大学中国大学mooc课后章节答案期末考试题库2023年1. 5.First of all, watching TV has the value of sheer relaxation. Watchingtelevision can be soothing and restful after an eight-hour day of pressure,challenges, or concentration. After working hard all day, people look forward to a new episode of a favorite show or yet another showing of Casablanca or Sleepless in Seattle. 该段的衔接手段主要是_____与______。

参考答案:近义词（话题近义词 TV-television-show-showing; 主题近义词relaxation-soothing-restful）、上下义词(TV--Casablanca or Sleepless in Seattle)2. 2.We hear a lot about the negative effects of television on the viewer.Obviously, television can be harmful if it is watched constantly to theexclusion of other activities. It would be just as harmful to listen to DCs allthe time or to eat constantly. However, when television is watched inmoderation, it is extremely valuable, as it provides relaxation, entertainment, and education. 该段两大内容是________与_________。