考核作业(综合测试题)
技能认证轨道交通综合考试(习题卷1)
技能认证轨道交通综合考试(习题卷1)第1部分：单项选择题，共44题，每题只有一个正确答案,多选或少选均不得分。
1.[单选题]下列关于建筑施工现场厕所的叙述，哪项是不正确的( )。
A)厕所蹲位数量应根据施工现场作业人员的人量设置，一般为1：25～1：30。
B)应设置水冲式或移动式厕所，地面应硬化，墙面刷白，纱门纱窗齐全。
C)有女职工时应分设男女厕所，蹲坑间宜设置隔板,隔板高度不宜低于0.9m。
D)厕所应由市政派人，定期进行清扫.冲刷.消毒，防止蚊蝇孳生，化粪池应及时清掏。
答案:D解析:2.[单选题]临边作业必须设置高度不低于( )m的防护栏杆.安全网及警示标志。
A)1.1B)1.2C)1.3D)1.4答案:B解析:3.[单选题]当扬尘监测数据超过( )时，应立即开启喷淋降尘设备(PM10监测指标)A)50微克/立方米B)100微克/立方米C)150微克/立方米D)200微克/立方米答案:C解析:4.[单选题]影响地铁安全运营的内部环境通常是指( )环境。
A)自然B)社会C)作业D)以上均不是答案:C解析:5.[单选题]以下名字，不能作为C语言标识符的是：A)ThisIsQingdaoUniversityB)$$C)monkey~1D)_答案:C解析:6.[单选题]已经回复的有效乘客投诉次数与有效乘客投诉次数之比称为( )。
D)乘客有效投诉率答案:C解析:7.[单选题]若x为浮点型，则表达式x=10/4为（ ）A)2.5B)2C)2D)3答案:B解析:8.[单选题]下列关于建筑施工现场办公.生活等临时设施的选址的叙述，哪项是不正确的( )。
.A)不能满足安全距离要求的，任何情况下都不能设置。
B)应考虑与作业区相隔离，周边环境必须具有安全性，如不得设置在高压线下。
C)不得设置在沟边.崖边.河流边.强风口处.高墙下。
D)不得设置在滑坡.泥石流等灾害地质带上和山洪可能冲击到的区域。
答案:A解析:9.[单选题]绝缘手套应定期检验电( )性能，不符合规定的不得使用。
中国传媒大学22春“广告学”《广告策划》作业考核题库高频考点版(参考答案)试题号5
中国传媒大学22春“广告学”《广告策划》作业考核题库高频考点版（参考答案）一.综合考核(共50题)1.在为企业的产品进行行业分析之前，需要明确企业产品所归属的行业，但是通常这个结论并不是非常明确的，而是要以制定市场策略的需要出发，进行合理的归属判断，使得这一行业范畴对于本次产品的市场和竞争研究来说不会过于宽泛，也不会过于狭窄。
()A.错误B.正确参考答案：B2.可以通过以下手段比较企业间的竞争优势：()A.市场占有率B.技术领先C.定价D.企业理念与形象参考答案：ABCD3.报纸是视觉媒介，通过印刷在平面纸张上的文字、图片、色彩、版面设计等符号传递信息。
利用视觉供人阅读，是报纸媒介最大的特点，是与其它媒介相区别的最鲜明特征。
()A.错误B.正确参考答案：B4.当一个行业的产品和服务差别性比较弱，很难区别时，竞争基本上是基于()A.质量B.价格C.服务D.资本参考答案：B5.对竞争对手的基本市场概况做监测，主要可以从下面几个方面入手?()A.竞争对手间的市场现状B.竞争对手的历史背景C.与竞争对手进行产品比较D.竞争对手对市场发展趋势的关注参考答案：ABCD6.广告费用不属于商品成本构成的一部分。
()A.错误B.正确参考答案：A7.对现有市场来说，行业的市场规模即为同行业的产品销量总合，是可以通过对已有市场数据的收集整理而计算或推算出来的。
()A.错误B.正确参考答案：B8.差别化行业产品易于实施产品差别化战略，以下哪些品牌适合这样做?()A.洗发水B.白酒C.牙膏D.大米参考答案：ABC9.在制造产品时，很需要有如何才能将产品卖出去的主意，这就是()，这个理念是指为制造畅销品所想出与消费者联系起来的好主意，其关键就是要把视角从产品的身上转到消费者的身上。
B.商品概念C.销售重点D.表现概念参考答案：B10.请选择适合目前中国的代际群体：()A.90代B.蚁族C.X-世代D.新富阶级参考答案：AB11.一个销售者_____的市场，是一个不记名的市场。
综合英语(进阶)过程性考核作业一
试题列表填空题题型：填空题客观题答案不允许乱序分值20分难度：一般得分：201A1. Fill in the blanks with the words or expressions given in a word bank below. Each choice in the bank is identified by a letter. Please mark the corresponding letter for each blank.A. gives way toB. are liable toC. parallelsD. resorted toE. peculiarF. saddled withG. calculateH. boostI. prospectJ. stand up forThere is a real need to 1Hacademic achievement in schools and help with the development of a student's overallcharacter.Being a single parent, there is no way for her to 2G the time and energy she has devoted to her children for the past 10 years.Not until recently have we realized that the increasing world population may lead to a potential gloomy 3I for humanity: starvation.Because women often restrict their diet in an effort to control weight, they may not consume enough iron-rich food and 4B experience an iron deficiency.During the weeks of discussions, delegations from groups who are interested in the resolutionmay call on representatives to 5J their point of view.Ernest Hemingway's keen insight into his society, ardent love for people and perceptive abilitieshelped him to form his own 6E characteristic of writing.The change in smoking habits 7C a change in the incidence of lung cancer. The more people smoke, the more chances ofoccurrence for lung cancer.As a result of her divorce, she was obviously 8F the double burden of playing the role of both mother and father.As our sweet childhood 9Aadolescence's temptation of love, we begin to learn, as adults, that most pleasures do not lastforever.In the economic recession, employers 10Dthe reduction of costs, most particularly in wages, in order to survive in the competitive world markets.第10空分值：2分正确答案：H；G；I；B；J；E；C；F；A；D题型：填空题客观题答案不允许乱序分值20分难度：一般得分：182A2. Read the passage and select one word for each blank.A. unavoidablyB. transitionC. enormousD. radicalE. MeanwhileF. definitelyG. adulthoodH. traditionalI. tendJ. resentThe odyssey years refer to a life stage that young people have to go through. It's described as an unsteady or fluid journey that young people need to take before they enter 1 G .The contemporary generation, also called pre-adults, adolescents, the lost generation, extended adolescents or emerging adults, are living in a society full of 2D changes. They graduated into one of the worst economies in decades, saddled with 3C pressure. According to a news report, half of recent college graduates are unemployed or underemployed with low-wage service jobs. Research shows that young people, with prideful attitudes, 4T to be more depressed and less motivated if they are underemployed for just nine months.Since they usually 5 J competitive pressure, they often resort to heavy drinking to help distract them from their painand stress.6 E , they act with rebellious behaviors, keep a distance from their parents, or even run away from home.In this 7 B phase, many young people unfortunately underestimate the satisfaction that comes fromjoining the working world.During this unavoidable stage of their life, they are moving back home, going back to school or embracing unpaid internships as new starter jobs. Lacking 8 H aspirations, they are marrying later and starting families still later. However, they 9 Fenjoy having fun. Obviously, in this unique phase, many young people think real life starts later, but they are actually falling behind. They don't really understand that they are 10 Afacing peculiar challenges and dealing with a phenomenon that is a matter of choice in many cases.第10空分值：2分正确答案：G；D；C；I；J；E；B；H；F；A题型：填空题客观题答案不允许乱序分值10分难度：较难得分：103A3. Read the passage and choose the best answers.Passage One. Questions 1 to 5 are based on the following passage.A recent global survey of 2,000 high-net-worth individuals found about 60% were not planning on a traditional retirement. Among U.S. participants, 75% expected to continue working in some capacity even after stepping away from full-time jobs. "Many of these people made their wealth by doing something they're passionate(有激情的) about," says Daniel Egan, head of behavioral finance for Barclays Wealth Americas. "Given the choice, they prefer to continue working." Barclays calls these people "nevertirees".Unlike many Americans compelled into early retirement by company restrictions, the average nevertiree often has no one forcing his hand. If 106-year-old investor Irving Kahn, head of his own family firm, wants to keep coming to work every day, who's going to stop him?Seventy-eight-year-old Supreme Court Justice Ruth Bader Ginsburg's job security is guaranteed in the Constitution.It may seem that these elderly people are trying to cheat death. In fact, they are. And it's working. Howard Friedman, a professor at UC Riverside, found in his research that those who work hardest and are successful in their careers often live the longest lives. "People are generally being givenbad advice to slow down, take it easy, stop worrying, and retire to Florida," he says. He described one study participant, still working at the age of 100, who was recently disappointed to see his son retire."We're beginning to see a change in how people view retirement," says George Leeson, co-director of the Institute of Population Ageing at Oxford. Where once retirement was seen as a brief reward after a long struggle through some miserable job, it is now akin(近似) to being cast aside. What Leeson terms "the Warren Buffett effect" is becoming more broadly appealing as individuals come to "view retirement as not simply being linked to economic productivity but also about contribution."Observers are split on whether this is a wholly good thing. On the one hand, companies and financial firms can benefit from the wisdom of a resilient(坚韧的) chief. On the other hand, the new generation can find it more difficult to advance —an argument that typically holds little sway to a nevertiree.1. What do we learn about the so-called "nevertirees"?CA) They are passionate about making a fortune.B) They have no choice but to continue working.C) They love what they do and choose not to retire.D) They will not retire unless they are compelled to.2. What do Irving Kahn and Ruth Bader Ginsburg have in common?AA) Neither of them is subject to forced retirement.B) Neither of them desires reward for their work.C) Both cling to their positions despite opposition.D) Both are capable of coping with heavy workloads.3. What is the finding of Howard Friedman's research?DA) The harder you work, the bigger your fortune will be.B) The earlier you retire, the healthier you will be.C) Elderly people have to slow down to live longer.D) Working at an advanced age lengthens people's life.4. What is the traditional view of retirement according to the passage?CA) It means a burden to the younger generation.B) It is a symbol of a mature and civilized society.C) It is a compensation for one's life-long hard work.D) It helps increase a nation's economic productivity.5. What do critics say about "nevertirees"?DA) They are an obstacle to a company's development.B) They lack the creativity of the younger generation.C) They cannot work as efficiently as they used to.D) They prevent young people from getting ahead.正确答案：C；A；D；C；D学生答案：C；A；D；C；D题型：填空题客观题答案不允许乱序分值10分难度：较难得分：104A4. Read the passage and choose the best answers.Passage Two. Questions 1 to 5 are based on the following passage.When we talk about Americans barely into adulthood who are saddled with unbearable levels of debt, the conversation is almost always about student loan debt. But there's a growing body of evidence suggesting that today's young adults are also drowning in credit-card debt —and that many of them will take this debt to their graves.More than 20% overspent their income by more than $100 every single month. Since they haven't built up their credit histories yet, it's a safe bet that these young adults are paying relatively high interest rates on the resulting credit card debt.Although many young people blame "socializing" as a barrier to saving money, most of them aren't knocking back $20 drinks in trendy(时尚的)lounges. They're struggling with much more daily financial demands.To a disturbingly large extent, the young and the broke are relying on credit cards to make it until their next payday. This obviously isn't sustainable in the long run, and it's going to put a huge drag on their spending power even after they reach their peak earning years, because they'll still be paying interest on that bottle of orange juice or box of spaghetti(意式面条) they bought a decade earlier.A new study out of Ohio State University found that young adults are accumulating credit card debt at a more rapid rate than other age groups, and that they're slower at paying it off. "If what we found continues to hold true, we may have more elderly people with substantial financial problems in the future," warns Lucia Dunn, professor of economics at Ohio State. "If our findings persist, we may be faced with a financial crisis among elderly people who can't pay off their credit cards."Dunn says a lot of these young people are never going to get out from under their credit card debt. "Many people are borrowing on credit cards so heavily that payoff rates at these levels are not sufficient to recover their credit card debt by the end of their life, which could have loss implications for the credit card issuing banks."1. What is the main idea of the first paragraph?AA) Many young Americans will never be able to pay off their debts.B) Credit cards play an increasingly important role in college life.C) Credit cards are doing more harm than students loans.D) The American credit card system is under criticism.2. Why do young people have to pay a higher interest on their credit card debt?BA) They tend to forget about the deadlines.B) They haven’t developed a credit history.C) They are often unable to pay back in time.D) They are inexperienced in managing money.3. What is said to be the consequence of young adults relying on credit cards to make ends meet? DA) It will place an unnecessary burden on society.B) It will give them no motivation to work hard.C) It will exert psychological pressure on them.D) It will affect their future spending power.4. What will happen to young adults if their credit card debt keeps accumulating according to Lucia Dunn?BA) They will have to pay an increasingly higher interest rate.B) They may experience a financial crisis in their old age.C) Their quality of life will be affected.D) Their credit cards may be cancelled.5. What does Lucia Dunn think might be a risk for the credit card issuing banks?CA) They go bankrupt as a result of over-lending.B) They lose large numbers of their regular clients.C) Their clients leave their debts unpaid upon death.D) Their interest rates have to be reduced now and then.正确答案：A；B；D；B；C学生答案：A；B；D；B；C题型：填空题客观题答案不允许乱序分值10分难度：较难得分：105A5. Read the passage and choose the best answers.Passage Three. Questions 1 to 5 are based on the following passage.In recent years, a growing body of research has shown that our appetite and food intake are influenced by a large number of factors besides our biological need for energy, including our eating environment and our perception of the food in front of us.Studies have shown, for instance, that eating in front of the TV (or a similar distraction) can increase both hunger and the amount of food consumed. Even simple visual cues, like plate size and lighting, have been shown to affect portion size and consumption.A new study suggested that our short-term memory also may play a role in appetite. Several hours after a meal, people's hunger levels were predicted not by how much they'd eaten but rather by how much food they'd seen in front of them —in other words, how much they remembered eating.This disparity (差异) suggests the memory of our previous meal may have a bigger influence on our appetite than the actual size of the meal, says Jeffrey M.Brunstrom, a professor of experimental psychology at the University of Bristol."Hunger isn't controlled solely by the physical characteristics of a recent meal. We have identified an independent role for memory for that meal," Brunstrom says. "This shows that the relationship between hunger and food intake is more complex than we thought."These findings echo earlier research that suggests our perception of food can sometimes trick our body's response to the food itself. In a 2011 study, for instance, people who drank the same 380-calorie (卡路里) milkshake on two separate occasions produced different levels of hunger-related hormones (荷尔蒙), depending on whether the shake's label said it contained 620 or 140 calories. Moreover, the participants reported feeling more full when they thoughtthey'd consumed a higher-calorie shake.What does this mean for our eating habits? Although it hardly seems practical to trick ourselves into eating less, the new findings do highlight the benefits of focusing on our food and avoiding TV and multitasking while eating.The so-called mindful-eating strategies can fight distractions and help us control our appetite, Brunstrom says.1. What is said to be a factor affecting our appetite and food intake?AA) How we perceive the food we eat.B) What ingredients the food contains.C) When we eat our meals.D) How fast we eat our meals.2. What would happen at meal time if you remembered eating a lot in the previous meal?DA) You would probably be more picky about food.B) You would not feel like eating the same food.C) You would have a good appetite.D) You would not feel so hungry.3. What do we learn from the 2011 study?BA) Food labels may mislead consumers in their purchases.B) Food labels may influence our body’s response to food.C) Hunger levels depend on one's consumption of calories.D) People tend to take in a lot more calories than necessary.4. What does Brunstrom suggest we do to control our appetite?CA) Trick ourselves into eating less.B) Choose food with fewer calories.C) Concentrate on food while eating.D) Pick dishes of the right size.5. What is the main idea of the passage?BA) Eating distractions often affect our food digestion.B) Psychological factors influence our hunger levels.C) Our food intake is determined by our biological needs.D) Good eating habits will contribute to our health.正确答案：A；D；B；C；B学生答案：A；D；B；C；B简答题题型：简答题主观题分值30分难度：中等得分：261A6. Translation. Translate the following passage into Chinese.Studying the humanities improves our ability to read and write. No matter what we do in life, we will have a huge advantage if we can read complex ideas and understand their meaning. We willhave a bright career if we are the person in the office who can write a clear and elegant analysis of those ideas! Studying the humanities makes us familiar with the language of emotion and the creative process. In an information economy, many people have the ability to produce a useful product such as a new MP3 player. Yet, very few people have the ability to create a spectacular brand: the iPod. Most importantly, studying the humanities invests us with great insight and self-awareness, thereby releasing our creative energy and talent in a positive and constructive manner.正确答案：学习人文学科会提高我们的阅读和写作能力。
山财自考37线性代数考核作业(已填好问题详解)
线性代数（经管类）综合试题一（课程代码 4184）一、单项选择题（本大题共10小题，每小题2分，共20分）在每小题列出的四个备选项中只有一个是符合题目要求的，请将其代码填写在题后的括号内。
错选、多选或未选均无分。
1.设D==M≠0，则D1==( B )．A.－2MB.2MC.－6MD.6M2.设 A、B、C为同阶方阵，若由AB = AC必能推出B = C，则A应满足 ( D )．A. A≠OB. A = OC.|A|= 0D. |A|≠03.设A，B均为n阶方阵，则 ( A)．A.|A+AB|=0，则|A|=0或|E+B|=0B.(A+B)2=A2+2AB+B2C.当AB=O时，有A=O或B=OD.(AB)-1=B-1A-14.二阶矩阵A，|A|=1，则A-1= ( B)．A. B. C. D.，则下列说法正确的是( B )．A.若两向量组等价，则s = t .B.若两向量组等价，则r()= r()C.若s = t，则两向量组等价.D.若r()=r()，则两向量组等价.6.向量组线性相关的充分必要条件是 ( C )．A. 中至少有一个零向量B. 中至少有两个向量对应分量成比例C. 中至少有一个向量可由其余向量线性表示D. 可由线性表示7.设向量组有两个极大无关组与，则下列成立的是( C )．A. r与s未必相等B. r + s = mC. r = sD. r + s > m8.对方程组Ax = b与其导出组Ax = o，下列命题正确的是( D )．A. Ax = o有解时，Ax = b必有解.B. Ax = o有无穷多解时，Ax = b有无穷多解.C. Ax = b无解时，Ax = o也无解.D. Ax = b有惟一解时，Ax = o只有零解.9.设方程组有非零解，则k = ( D)．A. 2B. 3C. -1D. 110.n阶对称矩阵A正定的充分必要条件是( D )．A. |A|>0B.存在n阶方阵C使A=C T CC.负惯性指标为零D.各阶顺序主子式均为正数二、填空题（本大题共10小题，每小题2分，共20分）请在每小题的空格中填上正确答案。
西安交通大学16年3月课程考试《传热学》作业考核试题
请同学及时保存作业,如您在20分钟内不作操作,系统将自动退出。
西安交通大学16年3月课程考试《传热学》作业考核试题试卷总分：100 测试时间：--单选题判断题一、单选题（共 30 道试题，共 60 分。
）V1. 冬天时节，棉被经过白天晾晒，晚上人盖着感觉暖和，是因为（）。
A. 棉被中蓄存了热量，晚上释放出来了B. 棉被内表面的表面传热系数减小了C. 棉被变厚了，棉被的导热系数变小了D. 棉被外表面的表面传热系数减小了满分：2 分2. 流体流过短管内进行对流换热时其入口效应修正系数（）。
A. =1B. >1C. <1D. =0满分：2 分3. 下列材料中导热系数最大的是（）。
A. 纯铜B. 纯铁C. 黄铜D. 天然金刚石满分：2 分4. 空间辐射热阻与（）无关。
A. 表面粗糙度B. 表面尺寸C. 表面形状D. 表面间的相对位置满分：2 分5. （）是在相同温度条件下辐射能力最强的物体。
A. 灰体B. 磨光玻璃C. 涂料D. 黑体满分：2 分6. 有一台放置于室外的冷库，从减少冷库冷量损失的角度，冷损失最小的冷库外壳颜色为（）。
A. 绿色B. 蓝色C. 灰色D. 白色满分：2 分7. 灰体表面热阻与（）有关。
----------------------------精品word文档值得下载值得拥有----------------------------------------------A. 表面粗糙度B. 表面尺寸C. 表面材料D. 表面位置满分：2 分8. 采用蒸汽和电加热器对水进行加热，下列说法正确的是（）。
A. 采用蒸汽对水进行加热易使容器烧毁B. 采用电加热器对水进行加热易使容器烧毁C. 采用蒸汽和电加热器对水进行加热，使容器烧毁的可能性一样D. 采用蒸汽和电加热器对水进行加热，都不会使容器烧毁的满分：2 分9. 不稳态导热采用有限差分方法求解温度场，关于差分方程，下列说法错误的是（）。
2022-2023年安全员考试知识点题库
2022-2023年安全员考试知识点题库综合测试题(共200个，分值共：)1、从事高处作业的工人，必须年满（）周岁。
B.18C.20D.25选择答案：BCD正确答案：B2、起重机的附着锚固应符合的要求，在附着框架和附着支座布设时，附着杆倾斜角不得超过（）。
A.10°B.15°C.20°D.25°正确答案：A3、《中华人民共和国建筑法》，自（）开始实施A.B.D.正确答案：B4、施工单位应当建立健全教育培训制度，加强对职工的教育培训，未经教育培训或者考核不合格的人员（）A.不得上岗作业B.应当下岗C.可以上岗作业D.调到其他岗位就职正确答案：A5、电梯井口除设置固定栅门外（门栅网格的间距不应大于15cm），还应在电梯井内( )设置一道平网。
A.每隔两层（不大于10m）B.每隔三层（不大于12m）C.每隔三层（不大于15m）D.每隔四层（不大于15m）正确答案：A6、建筑施工安全检查评分表分为（）个等级。
选择答案：正确答案：B7、使用直爬梯进行攀登作业时，超过（）米时，应加设防护笼。
A.2B.5C.7正确答案：C8、支模、粉刷、砌筑等各工种进行上下立体交叉作业时，不得在（）方向上操作。
A.同一垂直B.同一横面C.垂直半径外D.不同垂直正确答案：A9、劳动安全卫生设施必须符合国家规定的标准。
新建、改建、扩建工程的劳动安全卫生设施必须与主体工程（）。
A.同时设计B.同时施工C.同时验收D.同时投入生产和使用E.同时竣工正确答案： A,B,D10、《安全生产法》中明确了（）A.生产经营单位必须做好安全生产的保证工作B.从业人员进行安全生产所享有的权利C.对违法单位和个人的法律责任追究制度D.明确了从业人员为保证安全生产所应尽的义务E.确立了安全生产检查制度正确答案：A,B,C,D11、不属于企业取得安全生产许可证所应当具备安全生产条件的是（），A.建立、健全安全生产责任制，制备完备的安全生产责任制度和操作规程B.安全投入符合安全生产要求C.设置安全生产管理机构，配备专职安全生产管理人员D.企业负责人学历要求为本科以上正确答案：D12、一般意义上讲，“安全生产”这个概念，是指在社会生产活动中，通过（）的和谐运作，使生产过程中潜在的各种事故风险和伤害因素始终处于有效控制状态，切实保护劳动者的生命安全和身体健康。
大学英语(B)(2)形成性考核作业3(综合性大作业)
单选题题型：单选题客观题分值2分难度：中等得分：21阅读Passage One，回答C-1到C-4四个问题。
请从A、B、C、D四个选项中选出可以填入题干空白处的最佳选项。
Passage OneThe fourth round of heavy smog that hit Beijing in four weeks has sent more people to the hospital with respiratory(呼吸的) illnesses and led to calls for laws to control the pollution.Pan Shiyi, a real estate developer, said he is planning to propose(提出) a Clean Air Act to the local government. As a representative of the Beijing Municipal People’s Congress, he started an online survey at 9:20 am. Within three hours，more than 25,000 web users, or 99 percent of total respondents, welcomed his proposal on Sina Weibo, China’s Twitter.They have good reasons to stand alongside Pan. The latest round of haze(雾霾) reduced visibility to under 500 meters in many parts of the city. The smog has also led to a great increase in respiratory illnesses, particularly among children and the elderly. Anxious parents and doctors about all blame the smoggy air for the illnesses. Though most schoolchildren are home for the winter holidays, the bad air can easily move indoors. Besides, ordinary medical masks fail to provide adequate protection, so some people have turned to gas masks and respirators(呼吸器). The causes of the scary smog are rather mysterious, though experts blame excessive emissions and the mountains around Beijing that trap pollution in winter, unless there is adequate wind to clear it away. Some critics have pointed fingers at China’s top two oil firms, China National Petroleum Corp and China Petrochemical Corporation, saying the companies’outdated production technologies produce large quantities of substandard, highpolluting gas fuel. Meanwhile, concerned Beijingers have moved their brainstorming sessions to cyberspace. If Pan’s proposal for a Clean Air Act is adopted, netizens say the new law should include items providing for “carfree days”in times of smog, higher standards for vehicle fuel, stricter restrictions on industrial and exhaust gas emissions，and more effective protection for the public.Beijing is not the only city that has ever lost the blue sky. Five days of thick fog caused thousands of deaths in Britain in December 1952, urging the government to pass the first Clean Air Act in 1956, which introduced smokeless zones and cleaner fuels to reduce pollution. That may provide some experience for Beijing to refer to.C-1. Why did Pan Shiyi started an online survey?ATo investigate the public’s opinions on pollution.BTo tell people the danger of the smoggy weather.CTo call on more people to support his proposal.DTo collect supporting evidences for his proposal.正确答案：D学生答案：D题型：单选题客观题分值2分难度：中等得分：22阅读C-1题干中Passage One材料，完成本题。
2022 年全国职业院校技能大赛(中职组)现代物流综合作业赛项职业素养考核赛题(08)
2022年全国职业院校技能大赛中职组现代物流综合作业赛项（试题八）职业素养考核赛题（一）一、单项选择题（本大题共40小题，每小题1分，共40分）1. 下列属于公路运输技术与装备的是（）。
A. 线路B. 货运场站C. 信号设备D. 车站2. 在经济合理区域范围内，根据客户要求，对物品进行拣选、加工、包装、分割、组配等作业，并按时送达指定地点的物流活动是（）。
A. 运输B. 配送C. 装卸搬运D. 流通加工3. 配送站点作业的差异多发生在交货环节，常见的作业异常不包括．．．（）。
A. 交错客户B. 客户拒收C. 上车漏装D. 少交货品4. 发达国家政府倡导绿色物流配送的对策是在三个方面制定相关的政策，下列不属于．．．这三个方面的是（）。
A. 污染发生源B. 交通量C. 交通流D. 物流系统5. 下列可以作为零担货物办理托运的货品是（）。
A.活鸡活鸭B. 易爆炸品C. 电脑主机D. 易燃液体6. 铁路货物运输的作业流程不包括．．．（）。
A. 发送作业B.途中作业C. 到达作业D. 跟踪作业7. 海洋运输货物保险的基本险中，保险费率最高的是（）。
A. 平安险B. 锈损险C. 水渍险D. 一切险8. 仓储管理系统的英文简称是（）。
A. DCMISB. SaaSC. TMSD. WMS9. 观察图片，选出图片中物流拣选机器人在操作中使用的对应系统是（）。
A.举升装置B.碰撞检测系统C.充电系统D.导航系统10. 下列不是托盘的优点的是( )。
A.自重量小B.装盘容易C.节省包装材料，降低包装成本D. 容量大11. 装车作业异常多发生在（）。
A. 集货环节B. 点货环节C. 上车环节D.包装环节12. 物流或者快递公司在各个末端配送区域设置的物流作业节点，是最底层的配送作业设施的是（）。
A. 配送中心B. 分拨中心C. 配送站点D. 集散中心13. 已经成为跨境电商的标配和趋势，无品类限制的跨境电商物流方式是（）。
综合英语(基础)过程性考核综合大作业 (4)
单选题题型：单选题客观题分值3分难度：简单得分：31Passage One“Daddy let’s take a walk.”It’s an April day in Virginia. He nods, puts his hands on the arms of his wheelchair whispers something that makes little sense. I try to help him up, but he is too heavy and limp（不强壮的）.“Come for a walk, and then —I’ve brought you a surprise.”The white curtains surge（蜂拥向前）in the breeze（微风）.Shivering（颤抖）, he complains（抱怨）it’s chilly（寒冷）. “It’s cold, I’m tired. Can’t we go home now?”Suddenly we’re far away in a time long past in part of a harbor I’ve never seen before. December, Chicago, I’m five, and cold. One glove is lost. My feet are tired. His legs are longer; he strides（进展）quickly through melting（融化）snow, toward buildings like airplane sheds with immense（巨大的）doors.This is the most exciting place I have ever been. Suddenly my fatigue（疲劳）is gone. I could walk along here forever, at least until I find out how to get aboard（在船、飞机、火车上）one of the boats.We slow down our pace. Smaller sheds now. A green diner. Smells of fish and smoke. We enter a little hut（小屋）. Barrels（桶）of salty water, string bags of shellfish（水生有壳动物）, bundles（捆）of fish laid out on ice.“Daddy, look at that snake!”“No, that’s an eel,（鳗）”says Daddy. “Smoked. We’ll take a portion （一部分）home for supper.”“I certainly won’t eat that!”“All right,”he says, and carries the smelly package. As we walk back he tells me about migrations（迁徙）of eels to the Sargasso Sea: how eels come down Dalmatian rivers and swim across the Mediterranean and then the whole Atlantic, until they reach the warm Sargasso Sea. Here they lay their eggs, and then the baby eels swim back to the native rivers of their parents.Back at last in the apartment he unwraps（包，裹）the eel, opens his pocket knife and slices carefully.“I won’t eat it,”I say suspiciously（猜疑地）.“Try one bite, just for me.”“I won’t like it.”While he hangs up our coats, I test one pinch（一小撮）. Smelly, smoky, and salty.He goes into the kitchen to heat milk for me and tea for himself. I test another pinch. Then another. He returns with the steaming cups.The eel has vanished（消失）.Because it is Sunday and I am five, he forgives me. Time slows down and the love flows in —father to daughter and back again.At 19, I fly out to Japan. My father and I climb Mount Fuji. High above the Pacific, and hours up the slope（斜面）, we picnic on dried eel, seaweed crackers, and cold rice wrapped in the eel skin. He reaches the peak（山顶）first.As the years stretch（延续）, we walk along waterways all over the world. With his long stride he often overtakes（追上）me. I’ve never known anyone with such energy.Some days, time flies with joy all around. Other days, time rots like old fish.Today in the nursing home in Virginia, anticipating （预期）his reluctance（勉强）, I beg boldly and encourage him, “Please, Daddy, just a little walk. You are supposed to exercise.”He can’t get out of his chair. Not that he often gets up on his own, but once in a while he’ll suddenly have a surge of strength. I stoop（俯身）to lift his feet from the foot restraints（安全装置）, fold back the metal pieces which often scrape（摩擦）his delicate （易碎的）paper-thin skin. “Come now you can stand.”He grips the walker and struggles forward. Gradually（逐渐地）I lift and pull him to his feet. Standing unsteadily, he sways（摇摆）and then gains his balance.“See, you made it! That’s wonderful! All right, I’ll be right behind you my hand in the small of your back. Now forward, march!”He is impatient with the walker as I accompany（陪伴）him to the dining room. I help him to his chair, and hand him a spoon. It slips from his fingers. Pureed（捣压成酱）tuna（金枪鱼）is heapedon a plastic plate. I encourage him, sing him old songs, tell stories, but he won’t eat. When I lift a spoonful of gray fishy stuff to his mouth, he says politely “I don’t care for any.”Nor would I. Then I take the small smelly package covered in white wrapping paper from a plastic bag. He loves presents and he reaches forward with awkward（笨拙的）fingers to try to open it. The smell fills the room.“Look, Daddy they’ve been out of it for months, but at last this morning at the fish seller near the Potomac, I found some smoked eel.”We unwrap it and then I take out the Swiss Army Knife my beloved aunt gave me “for safekeeping”, and slice the silvery flesh.“What a beautiful picnic,”my father beams.He takes a sip（一小口）of his champagne（香槟酒）, and then with steady fingers picks up a slice of eel and downs it easily. Then another, and another, until he eats the whole piece. And again, time slows down and the love flows in-daughter to father and back again.Understand Passage One and choose the best answer to each of the following questions (1-8):1.Why does the daughter find it difficult to help her father stand up?A Because he is tired.B Because he is reluctant to stand up.C Because he has hurt one of his legs.D Because he is heavy and weak.学生答案：D老师点评：题型：单选题客观题分值3分难度：简单得分：322. The following situations make the daughter think of her childhood except for _____.A fatigueB sicknessC cold weatherD reluctant to walk学生答案：B老师点评：题型：单选题客观题分值3分难度：简单得分：333. What makes the daughter’s fatigue go away?A She gets aboard a boat.B She is glad to see airplanes.C She finds the harbor very exciting.D She has some portion of smoked eel.学生答案：C老师点评：题型：单选题客观题分值3分难度：简单得分：344. How does the daughter react when her father suggests they take some smoked eel home for supper?A She agrees with her father’s idea.B She is curious if it is good to eat.C She immediately refuses to have it.D She is suspicious as it looks like a snake.学生答案：C老师点评：题型：单选题客观题分值3分难度：简单得分：355. What can we tell from “The eel has vanished”(Para. 19)?A The daughter has thrown away the eel.B The father finishes the eel very quickly.C The daughter likes the eel and has eaten it up.D The father and the daughter eat up the eel together.学生答案：C老师点评：题型：单选题客观题分值3分难度：简单得分：366. What has the daughter done to make her father cheer up again?A She tells stories to him.B She sings songs to him.C She takes a walk with him.D She brings him some smoked eel.学生答案：D老师点评：题型：单选题客观题分值3分难度：简单得分：377. Why does the daughter mention smoked or dried eel several times in the text?A To express her deep love for her father.B The recall how her father takes good care of her.C To stress the common things between her and her father.D To show the loving moments between her and her father.学生答案：D老师点评：题型：单选题客观题分值3分难度：简单得分：388. What is the purpose of the story?A To express the love between the daughter and her father.B To advise how to build a father-daughter relationship.C To describe how important smoked eel is to the father and daughter.D To show what a daughter can do to return the father’s love for her.学生答案：A老师点评：题型：单选题客观题分值3分难度：简单得分：39Passage TwoOfficer Jonda’s pulse quickened. Road conditions were dangerous on that cold, dark winterynight. The fierce storm made it hard to see, but she could tell the car ahead of her was in trouble. It was swaying. It was not swaying violently, and was still barely（几乎不）within the lane（小路）, but on the winding road in the fierce November rain, it was enough. Jonda had a sixth sense for accidents and lived in terror（恐惧）of them ever since that awful（糟糕的）night so many years ago. She still couldn’t abolish（废止）the terrible image（印象）of that teenager screaming for help, her help. Help that she had been unable to give as she was driven back by the intense heat of the car fire.Her subsequent report on the incident had dutifully noted the facts, as she had been trained to write them, facts that did not include screams or pain. It was strange to talk about them one way: a string of facts for a police report; and to think about them in another: burning metal and deep tire tracks on the slippery（滑的）concrete（混凝土）, bits of safety glass like primitive（简单的）crystals（水晶）reflecting（反射）in pools of blood. These were memories Jonda could never really turn off. She leaned（依，靠）on her training for support, and these days she never ignored （忽略）any signs of the next accident. She made a gesture to turn on the patrol（巡逻队）car’s flashing lights, but her partner, David, beat her to it; he too had sensed the danger. “Let’s pull that car over before someone gets hurt,”he said.The big car slowed, but not enough to stop at the warning sign as the driver slammed（猛放）on the brakes. The car slipped off the road into the Dalton River.Jonda quickly brought the police car to a halt（停止）and got out. Yelling（叫喊）at David to call for backup（后备人员）help, she slipped down the side of the road to the water’s edge.The rain had swelled（逐渐增加）the river into a raging monster（妖怪）. It roared（吼叫）well over its banks, rushing swiftly with tree limbs（大树枝）caught in the raging current（水流）. And half submerged（淹没）in the current was the car. As big as it was, the force of the water had heaved（推，拉）it against a tree, the passenger seat submerged, water rushing over the windshield. “Dear Lord（主）!”Jonda prayed. “Never again!”This is too much too familiar, Jonda thought.The driver would not have had time to make it out, Jonda knew. Her flashlight beam barely cut through the heavy rain, but she could still see the trapped driver screaming and banging the window. And the car was filling up with water.“David, I need the window hammer!”Jonda called over her radio and rushed toward the car. By the time she was at the driver door, the water was rushing up to her waist, and unbelievably cold, like her legs had been encased in ice. If she didn’t work quickly, she could lose the feeling in her lower（较低的）body and collapse（突然倒下）.Through the window, Jonda saw the woman with water up to her chest. A work badge（徽章）pinned to her chest identified（显示出）her as Sandy. And she was old, 65 or 70. She would not last long in the icy water. Her eyes, betraying（流露）her intense fear, were locked on Jonda’s. “Save me,”she screamed.David caught up with Jonda and passed her the window hammer. “Ma’am,”she yelled through the window, “I need you to turn away from the glass! I’m going to break through!”The woman turned her head, and Jonda struck. The glass, thick as the old car was big, barely cracked（裂开）. And with a heavy heart Jonda felt the car heave. The current was loosening it from the tree.Jonda struck again with all her might and this time, mercifully, the window broke into little pieces. Water rushed in and the car heaved again, soon to be carried downstream.The woman tried to speak through her shivering lips. “Tell my grandchildren I love them,”she moaned（抱怨）.Jonda leaned in and wrapped her arms around the woman. “We’re not going to lose you, Sandy! Put your arms around my neck and hold on! David, grab（抓住）my waist and pull!”With all her strength in the icy water, Jonda grabbed the slender（苗条的）woman out of her seat and through the broken window, David pulling at her waist. The car heaved one last time, and just as the woman cleared it, it was swallowed by the water.The woman was crying in Jonda’s arms. “It’s all right, ma’am,”Jonda said tears streaking （快速移动）down her cheeks, unable to let go of the woman. “We didn’t lose you! We didn’t lose you!”she cried. Stiff（僵硬的）and sore, Sandy cried, “Thank you!”Since the accident, the two women have become close friends. “She’s a fantastic woman,”Sandy says. “She just refused to let me die. I’m forever grateful to her.”But Jonda feels she has much to be grateful for too, because finally, she is healed（复原）and free of the acute（严重的）nightmares（噩梦）of her past.Understand Passage Two and choose the best answer to each of the following questions (9-16):9. Why did Jonda’s pulse quicken while she was driving?A Because the weather was terrible.B Because the car ahead was in trouble.C Because the car ahead was blocking her view.D Because the road was dangerous with many bends.学生答案：B老师点评：题型：单选题客观题分值3分难度：简单得分：31010. Why did Jonda fail to save the teenager many years ago?A Because she was too terrified to take any action.B Because she was pulled back by some other people.C Because the road was too slippery to move forward.D Because the car was on fire and she could not get near it.学生答案：D老师点评：题型：单选题客观题分值3分难度：简单得分：31111. After she failed to save the teenager, Jonda _____.A tried hard to avoid dealing with similar accidentsB decided to receive training to become more capableC became very sensitive to signs of potential accidentsD tried to get rid of the memories of the teenager’s accident学生答案：C老师点评：题型：单选题客观题分值3分难度：简单得分：31212. What caused the car ahead of Jonda to slip into the Dalton River?A The car did not slow down.B The car had a braking problem.C The car was barely within the lane.D The car failed to stop at the warning sign.学生答案：D老师点评：题型：单选题客观题分值3分难度：简单得分：31313. What did Jonda mean by “This is too much, too familiar”(Para. 5)?A She had saved many people’s lives from similar accidents.B She had seen too many similar accidents on this road.C This reminded her of the terrible accident involving that teenager.D This reminded her of another accident where a car fell into a river.学生答案：D老师点评：题型：单选题客观题分值3分难度：简单得分：31414. Why did Jonda have to work quickly when she was trying to save Sandy?A Because Sandy was seriously hurt.B Because the car window was broken.C Because Sandy had already become unconscious.D Because she could collapse soon学生答案：D老师点评：题型：单选题客观题分值3分难度：简单得分：31515. Why did Sandy ask Jonda to tell her grandchildren that she loved them?A Because she missed her grandchildrenB Because she thought she was going to die.C Because Jonda reminded her of her grandchildren.D Because Jonda would contact her grandchildren.学生答案：B老师点评：题型：单选题客观题分值3分难度：简单得分：31616. Why does Jonda feel she has much to be grateful for too?A Because she survived the accident.B Because Sandy is forever grateful to her.C Because Sandy has become her close friend.D Because she got rid of the guilty feeling by helping Sandy.学生答案：D老师点评：题型：单选题客观题分值3分难度：简单得分：317Passage ThreeConfucius is one of a handful of individuals who have shaped world history. His fame can be compared to great leaders and emperors, but Confucius neither commanded an army nor ruled a state yet his teachings shaped the soul of China. Confucianism，the great system of moral philosophy, or Confucius as he is known in the West, became the basis for personal and government morality in China. For a period of almost 1,500 years, the teachings of Confucius formed the basis of the Chinese state religion. Even today his teachings continue to influence modern China and its culture.Confucius was born in the year 551 B．C. in the state of Lu, in what is now the modern Chinese province of Shandong. At the age of 19, Confucius married and entered into government service for the state of Lu. He also began acquiring a band of disciples who were drawn to his teachings about personal behavior and morality.In 497 B．C. when Confucius was 54 years old, he was forced to leave the state. He traveled throughout China, surrounded by a band of faithful followers, teaching his moral philosophy. He eventually returned to his native state of Lu, where he attempted to influence the ruler. Confucius died in 479 B.C.. His son and his most promising pupils had died before him and it seemed that his teachings would not take root. But his students had collected many of his sayings in a book which came to be known as The Analects of Confucius, and in time the seeds that Confucius had planted took root and spread throughout China. In time, Confucianism became the official state religion of China.Understand Passage Three and choose the best answer to each of the following questions (17-20):17. Which of the following statements can best describe the influence of Confucius?A He is one of the greatest leaders in the world history.B He is one of the few persons who have influenced the world history greatly.C His contributions to the world are only second to those of some great leaders.D Confucianism is still the basis of the Chinese state religion.学生答案：B老师点评：题型：单选题客观题分值3分难度：简单得分：31818. The following facts can reflect the popularity of Confucianism EXCEPT “_____”.A Many students studied under Confucius in his early life.B Many students followed Confucius when he traveled around China.C After Confucius passed away, his students circulated his thoughts.D Many kings invited Confucius to help with their rule.学生答案：D老师点评：题型：单选题客观题分值3分难度：简单得分：31919. It can be inferred from the text that _____.A Everybody in ancient China believed in ConfucianismB Confucius may not have been so successful in his political lifeC Confucius is the most powerful person in shaping the world historyD Confucianism doesn’t have any effect on Chinese culture any longer 学生答案：B老师点评：题型：单选题客观题分值3分难度：简单得分：32020. The best title of the text is “_____”.A The Life Story of ConfuciusB The Influence of Confucius ThoughtsC The Political Life of ConfuciusD The Ups and Downs in the Life of Confucius学生答案：A老师点评：题型：单选题客观题分值2分难度：简单得分：221Translate the following expressions into English.1.人间天堂2.世界八大奇迹3.除夕4.拜年5.春联6.辞旧迎新7.灯谜8.农历新年9.燃放烟花爆竹10.传统节日21、”人间天堂“翻译为A pay a New Year call/visitB riddles written on lanternsC Chinese lunar New YearD traditional festivalE paradise on earthF eight wonders of the worldG New Year’s EveH Spring Festival coupletsI usher out the passing year and usher in the newJ set off fireworks and firecrackers学生答案：E老师点评：题型：单选题客观题分值2分难度：简单得分：222Translate the following expressions into English.1.人间天堂2.世界八大奇迹3.除夕4.拜年5.春联6.辞旧迎新7.灯谜8.农历新年9.燃放烟花爆竹10.传统节日22、”世界八大奇迹“翻译为A pay a New Year call/visitB riddles written on lanternsC Chinese lunar New YearD traditional festivalE paradise on earthF eight wonders of the worldG New Year’s EveH Spring Festival coupletsI usher out the passing year and usher in the new J set off fireworks and firecrackers学生答案：F老师点评：题型：单选题客观题分值2分难度：简单得分：2 23Translate the following expressions into English.1.人间天堂2.世界八大奇迹3.除夕4.拜年5.春联6.辞旧迎新7.灯谜8.农历新年9.燃放烟花爆竹10.传统节日23、”除夕“翻译为A pay a New Year call/visitB riddles written on lanternsC Chinese lunar New YearD traditional festivalE paradise on earthF eight wonders of the worldG New Year’s EveH Spring Festival coupletsI usher out the passing year and usher in the new J set off fireworks and firecrackers学生答案：G老师点评：题型：单选题客观题分值2分难度：简单得分：2 24Translate the following expressions into English.1.人间天堂2.世界八大奇迹3.除夕4.拜年5.春联6.辞旧迎新7.灯谜8.农历新年9.燃放烟花爆竹10.传统节日24、”拜年“翻译为A pay a New Year call/visitB riddles written on lanternsC Chinese lunar New YearD traditional festivalE paradise on earthF eight wonders of the worldG New Year’s EveH Spring Festival coupletsI usher out the passing year and usher in the new J set off fireworks and firecrackers学生答案：A老师点评：题型：单选题客观题分值2分难度：简单得分：2 25Translate the following expressions into English.1.人间天堂2.世界八大奇迹3.除夕4.拜年5.春联6.辞旧迎新7.灯谜8.农历新年9.燃放烟花爆竹10.传统节日25、”春联“翻译为A pay a New Year call/visitB riddles written on lanternsC Chinese lunar New YearD traditional festivalE paradise on earthF eight wonders of the worldG New Year’s EveH Spring Festival coupletsI usher out the passing year and usher in the new J set off fireworks and firecrackers学生答案：H老师点评：题型：单选题客观题分值2分难度：简单得分：2 26Translate the following expressions into English.1.人间天堂2.世界八大奇迹3.除夕4.拜年5.春联6.辞旧迎新7.灯谜8.农历新年9.燃放烟花爆竹10.传统节日26、”辞旧迎新“翻译为A pay a New Year call/visitB riddles written on lanternsC Chinese lunar New YearD traditional festivalE paradise on earthF eight wonders of the worldG New Year’s EveH Spring Festival coupletsI usher out the passing year and usher in the new J set off fireworks and firecrackers学生答案：I老师点评：题型：单选题客观题分值2分难度：简单得分：2 27Translate the following expressions into English.1.人间天堂2.世界八大奇迹3.除夕4.拜年5.春联6.辞旧迎新7.灯谜8.农历新年9.燃放烟花爆竹10.传统节日27、”灯谜“翻译为A pay a New Year call/visitB riddles written on lanternsC Chinese lunar New YearD traditional festivalE paradise on earthF eight wonders of the worldG New Year’s EveH Spring Festival coupletsI usher out the passing year and usher in the new J set off fireworks and firecrackers学生答案：B老师点评：题型：单选题客观题分值2分难度：简单得分：2 28Translate the following expressions into English.1.人间天堂2.世界八大奇迹3.除夕4.拜年5.春联6.辞旧迎新7.灯谜8.农历新年9.燃放烟花爆竹10.传统节日28、”农历新年“翻译为A pay a New Year call/visitB riddles written on lanternsC Chinese lunar New YearD traditional festivalE paradise on earthF eight wonders of the worldG New Year’s EveH Spring Festival coupletsI usher out the passing year and usher in the new J set off fireworks and firecrackers学生答案：C老师点评：题型：单选题客观题分值2分难度：简单得分：2 29Translate the following expressions into English.1.人间天堂2.世界八大奇迹3.除夕4.拜年5.春联6.辞旧迎新7.灯谜8.农历新年9.燃放烟花爆竹10.传统节日29、”燃放烟花爆竹“翻译为A pay a New Year call/visitB riddles written on lanternsC Chinese lunar New YearD traditional festivalE paradise on earthF eight wonders of the worldG New Year’s EveH Spring Festival coupletsI usher out the passing year and usher in the new J set off fireworks and firecrackers学生答案：J老师点评：题型：单选题客观题分值2分难度：简单得分：2 30Translate the following expressions into English.1.人间天堂2.世界八大奇迹3.除夕4.拜年5.春联6.辞旧迎新7.灯谜8.农历新年9.燃放烟花爆竹10.传统节日30、”传统节日“翻译为A pay a New Year call/visitB riddles written on lanternsC Chinese lunar New YearD traditional festivalE paradise on earthF eight wonders of the worldG New Year’s EveH Spring Festival coupletsI usher out the passing year and usher in the newJ set off fireworks and firecrackers学生答案：D老师点评：简答题题型：简答题主观题分值20分难度：简单得分：161A local environmental group is recruiting volunteers at the moment. You are willing to be one of them. Write an email to the recruiters, telling them:(1) why you want to be a volunteer;(2)what you can do for the group;(3) when you will be available.You should write about 100words. Do not sign your own name at the end of your email. Use ‘’Wang Lin”instead.学生答案：XX Environmental Protection Organization Hello:I am ｆｒｏｍClass 7 ｆｒｏｍMechanical Engineering. My name is Wang Lin. I am a member of the Youth Volunteer organization of Jiangsu Open University. I am honored to be selected as an outstanding volunteer by my class. In the past, I always adhere to the volunteer spirit of "dedication, friendship, mutual aid and progress". I love this activity very much. I would also like to participate in this activity.Since the beginning of the school, I have participated in a variety of volunteer activities, including bicycle maintenance, civilized supervision, CD action and so on. I have benefited a lot ｆｒｏｍthe volunteer activities for nearly half a year. First of all, it enriched my personal experience, as a contemporary college student, must be through the wind and rain, see the world, long knowledge, increase ability, make contributions, is to read ten thousand books, travel ten thousand miles; is to learn scientific and cultural knowledge, serve the social people; is to grow in learning, in practice.Some people say that volunteer service is "giving roses to others, leaving fragrance in hand", which is true. I never thought about getting anything when I participated in activities, but sometimes a thank you and a smile are enough to make me have no regrets, which makes me feel very glorious and proud.I heard that your organization is recruiting volunteers, and I really want to join me. After joiningme, I can organize public welfare and environmental protection publicity for the team, and provide green travel guarantee services for the masses.Of course, I prefer to organize such activities when I have holidays or breaks, because I have to finish my studies.I hope the organization can put me to volunteer activities. Try your best to contribute to the society.Wang LinOn May 15,2023。
西安交通大学16年9月课程考试工程热力学作业考核试题
C.功
D.压力
满分：2分
28.逆卡诺循环制冷系数的范围是（）。
A.大于1
B.大于零，小于1
C.大于零
D.小于零
满分：2分
29.如循环的目的是从低温热源吸热，则该循环是（）。
A.制冷循环
B.热机循环
C.正循环
D.热泵循环
满分：2分
30.由等温放热过程、绝热压缩过程、等温加热过程和绝热膨胀过程所组成的循环是（）。
B.正确
满分：2分
13.动稳定校验是为了检验电器在短路发生时，在电流的电动力作应下，电器承受的应力是否超出电器的最大允许应力。（ ）
A.错误
B.正确
满分：2分
14.隔离开关不允许带负荷操作。（ ）
A.错误
B.正确
满分：2分
15.短路冲击电流发生在最严重短路发生后的秒。（ ）
A.错误
B.正确
满分：2分
西安交通大学16年9月课程考试《工程热力学》作业考核试题
试卷总分：100测试时间：--
一、单选题（共30道试题，共60分。）
1.在p-v图上，一个比容增加的可逆过程线表示该过程是一个（）过程。
A.吸热
B.放热
C.对外做功
D.消耗外界功
满分：2分
2.在定容过程中，空气吸收的热量有（）转化为对外做功量。
A.速度
B.限度
C.速率
D.数量
满分：2分
23.在定容过程中，空气吸收的热量有转化为内能增加量（）。
A. 50％
B.％
C.％
D. 100％
满分：2分
24.对于一定质量的理想气体，不可能发生的过程是（）。
A.气体绝热膨胀，温度降低
东北大学22春“行政管理”《人事测评》作业考核题库高频考点版(参考答案)试题号2
东北大学22春“行政管理”《人事测评》作业考核题库高频考点版（参考答案）一.综合考核(共50题)1.智力是从事艰难、复杂、抽象、敏捷和创造性的活动的能力，并且是能集中精力，保持情绪稳定以从事这种活动的能力。
()A.正确B.错误参考答案：A2.这是我国历史上首个由中国人自编的“中国人个性调查表”是()。
A.加利福尼亚心理测验B.人性假设分析C.中国人人格量表QZPSD.中国人个性调查表参考答案：D3.测评标准通常由构念、标度、标号构成，称为测评标准的三要素。
()A.正确B.错误参考答案：A4.某种一般能力在某种活动领域得到特别的发展就可能成为特殊能力的组成部分。
()A.正确B.错误参考答案：AA.正确B.错误参考答案：A6.一个团体越是异质，其分数分布的范围也就越大，信度系数也就越高。
()A.正确B.错误参考答案：A7.态度的形成是一个孕育的过程，它一旦形成，便会成为人的个性结构中的主要组成部分，表现持久稳定的特点，改变起来不太容易。
()A.正确B.错误参考答案：A8.以下不属于态度的功能的选项是()A.调节行为的方向和对象的选择B.接收、处理与传送信息C.预设对象或事物的反映模式D.导致情绪上的不同体验参考答案：B9.下列哪个选项不是评价中心的特点?()A.动态性B.综合性C.逼真性D.及时性参考答案：D10.测评指标在测评体系中的重要性或测评指标在总分中所占的比重称为()A.定量B.定性C.权重D.标的参考答案：C11.1919年，美国武德沃斯发表了第一个自陈人格量表()，这开了人格问卷测量之先河。
A.工业管理的一般原理B.个人资料调查表C.心理测量D.科学管理原理参考答案：B12.结构证据是通过分析测验各部分和它打算测量的构念的关系获得的效度证据。
()A.正确B.错误参考答案：A13.测验的难度与信度没有直接对应关系，但是当测验太难或太易时，则分数的范围就会缩小，从而提高信度。
()A.正确B.错误参考答案：B14.下列哪项是评价中心的缺点()。
综合英语(进阶)过程性性考核作业三
试题列表填空题题型：填空题客观题答案不允许乱序分值20分难度：简单得分：201C1. Fill in the blanks with the words or expressions given in a word bank below. Each choice in the bank is identified by a letter. Please mark the corresponding letter for each blank.A. motivatingB. pay a big pricees down toD.enlighteningE.violatesF.would ratherG. makeconcessionsH. come in handyI. prejudicedpose1. If youFbe alone, we will leave here.2. The Prime Minister has made it clear that he won'tGto the strikers.3. It is a good opportunity for us to invest in the project, but itCmoney in the end; that is how much money we can afford to invest.4. You will need to prove the noise made by your neighborEthe regulations.5. She frowned at the sales report, making an effort toJherself before she talked to the employees.6. Although personally we believe this to be of only secondary importance, its potential rolein Ainnovative acts cannot be ignored.7. Please don't forget the Tourist Guide, which shouldHwhen you travel to different places in Asia and Europe for the next few weeks.8. She didn't want to marry him and wasIagainst him because he didn't meet her expectations for marriage.9. You willBfor not learning English; you never know how much you will miss without being able to speak English.10. To study a number of subjects in the humanities has been both enjoyable andD, providing me with a new and different perspective on the world in which we live.正确答案：F；G；C；E；J；A；H；I；B；D学生答案：F；G；C；E；J；A；H；I；B；D题型：填空题客观题答案不允许乱序分值20分难度：一般得分：202C2. Read the passage and select one word for each blank.A. vanishB.absolutelyC.rivalD.impliesE.accumulatingF.betterG.TheoreticallyH.ratherI.becauseJ.probabilityIn my opinion, making a decision 1Dthat there are several options for us to think about. Sometimes, we have to choose from 2 Coptions, and in such a case we want not only to identify as many of these difficult choices as possible, but also to choose the one that has the highest 3Jof success. To achieve this goal, every carefully chosen decision must be made in the light of a preset standard. Also, "Do it" or "Don't do it" does not qualify as a set of alternative choices. Only "Do this" or "Do something else" really qualifies. (By Steven)4G, the winning strategy of decision-making is to sufficiently reduce uncertainty to allow a reasonable choice to be made. However, many of us are expectedly unreasonable. We can't bear to let any opportunities 5A nor can we even stand the temporary pain. We have a tendency to seek more information than required to make a complicated decision. However, when too much information is sought and obtained, 6Hthan restricted options, several problems can arise. (By Judy)That's 7Btrue. For example, when so much information is available, our decision-making ability actually declines 8Ithe information can no longer be managed with conscious effort. A major problem caused by information overload is forgetfulness. We are naturally prejudiced that more is 9F. However, when too much information is taken into memory, especially in a short period of time, some of the information that was received earlier will be pushed out. Therefore, 10Eevidence shows that more is not necessarily better. (By Jason)正确答案：D；C；J；G；A；H；B；I；F；E学生答案：D；C；J；G；A；H；B；I；F；E题型：填空题客观题答案不允许乱序分值10分难度：较难得分：103C3. Reading comprehension. Questions 1 to 5 are based on the following passage.For millions of years before the appearance of the electric light, shift work, all-night cable TV and the Internet, earth's creatures evolved on a planet with predictable and reassuring 24-hour rhythms. Our biological clocks are set for this daily cycle. Simply, our bodies want to sleep at night and be awake during the day. Most women and men need between eight and eight and a half hours of sleep a night to function properly throughout their lives. (Contrary to popular belief, humans don't need less sleep as they age.)But on average, Americans sleep only about seven and a half hours per night, a marked drop from the nine hours they averaged in 1910. What's worse, nearly one third of all Americans get less than six hours of sleep on a typical work night. For most people, that's not nearly enough.Finding ways to get more and better sleep can be a challenge. Scientists have identified more than 80 different sleep disorders. Some sleeping disorders are genetic. But many problems are caused by staying up late and by travelling frequently between time zones or by working nights. Dr. James F. Jones at National Jewish Medical and Research Centre in Denver says that sleep disorders are often diagnosed as other discomforts. About one third of the patients referred to him with possible chronic fatigue syndrome actually have treatable sleep disorders. "Before we do anything else, we look at their sleep," Jones says.Sleep experts say that most people would benefit from a good look at their sleep patterns. "My motto(座右铭) is 'Sleep defensively'," says Mary Carskadon of Brown University. She says people need to carve out sufficient time to sleep, even if it means giving up other things. Sleep routines —like going to bed and getting up at the same time every day —are important. Pre-bedtime activities also make a difference. As with Elsner, who used to suffer from sleeplessness, a few life style changes —avoiding stimulants and late meals, exercising hours before bed-time, relaxing with a hot bath —yield better sleep.1. What do we learn about human sleep from the second paragraph?A) Most people need less sleep when they grow older.B) Most people need seven and a half hours of sleep every night.C) On average, people in the US today sleep less per night than they used to.D) For most people, less than six hours of sleep on a typical work night is enough.2. For our bodies to function properly, we shouldA.A) sleep for at least eight hours per nightB) believe that we need less sleep as we ageC) adjust our activities to the new inventionsD) be able to predict the rhythms of our biological clocks3. According to the author, many sleeping disorders are caused byB .A) other diseasesB) improper sleep patternsC) pre-bedtime exercisesD) chronic fatigue syndrome4. Which of the following measures can help you sleep better?DA) Having late meals.B) Travelling between time zones.C) Staying up late.D) Taking a hot bath.5. What does the author mean by saying "Sleep defensively" (Para. 4)?CA) People should go to a doctor and have their problems diagnosed.B) People should exercise immediately before going to bed every night.C) People should sacrifice other things to getting enough sleep if necessary.D) People should give up going to bed and getting up at the same time every day.正确答案：C；A；B；D；C学生答案：C；A；B；D；C题型：填空题客观题答案不允许乱序分值10分难度：较难得分：104C4. Passage Two. Questions 1 to 5 are based on the following passage.Some 23 million additional US residents are expected to become more regular users of the US health care system in the next several years, thanks to the passage of health care reform. Digitizing medical data has been promoted as one way to help the already burdened system manage the surge in patients. But putting people's health information in databases and online is going to do more than simply reduce redundancies (冗余). It is already shifting the very way we seek and receive health care."The social dynamics of care are changing," says John Gomez, vice president and chief technology strategy officer at Eclipsys, a medical information technology company. Most patients might not yet be willing to share their latest CT scan images over Facebook, he notes, but many parentspost their babies' ultrasound(超声波) images, and countless patients nowadays use social networking sites to share information about conditions, treatments and doctors.With greater access to individualized health information —whether that is through a formal electronic medical record, a self-created personal health record or a quick instant-messaging session with a physician —the traditional roles of doctors and patients are undergoing a rapid transition. "For as long as we've known, health care has been 'I go to the physician, and they tell me what to do, and I do it'," says Nitu Kashyap, a physician and research fellow at the Yale Center for Medical Informatics. Soon more patients will be arriving at a hospital or doctor's office having reviewed their own record, latest test results and recommended articles about their health concerns. And even more individuals will be able to skip that visit altogether, instead sending a text message or e-mail to their care provider or consulting a personal health record or smart-phone application to answer their questions.These changes will be strengthened by the nationwide shift to electronic medical records, which has already begun. Although the majority of US hospitals and doctors' offices are still struggling to start the changeover, many patients already have electronic medical records —and some even have partial access to them. The MyChart program, in use at Cleveland Clinic, the University of Texas Southwestern Medical Centre at Dallas and other facilities, is a Web portal(门户) through which patients can see basic medical information as well as some test results.Medical data is getting a new digital life, and it is jump-starting a "fundamental change in how care is provided", Gomez says.1. What does the author say about putting patient information in databases and online?DA) It enables more Americans to join the health care system.B) It contributes to the passage of health care reform.C) It increases the burden of the US health care system.D) It changes how people seek and receive health care.2. What do many patients use social networking sites to do according to John Gomez?CA) To improve their social interactions.B) To post their latest CT scan images.C) To share information about their health care.D) To show their babies' recent pictures.3. According to Nitu Kashyap, more patients in the future willC .A) refuse to follow their doctors' adviceB) be more dependent on their doctorsC) leave out their visit to doctors' offices and hospitalsD) have their illness cured through e-mail4. It is stated in the fifth paragraph thatD.A) nationwide digitalization of medical data will begin soonB) most of US hospitals and doctors are against the shiftC) patients are worried about the security of their health informationD) patients are starting to make use of their electronic medical records5. The best title for this passage could beA .A) The Future of Your Medical DataB) Challenges Against Doctors and HospitalsC) Benefits of the US Health Care ReformD) How to Access and Share Your Health Information正确答案：D；C；C；D；A学生答案：D；C；C；D；A题型：填空题客观题答案不允许乱序分值10分难度：较难得分：105C5. Passage Three. Questions 1 to 5 are based on the following passage."Sushi tastes amazing. A great steak is just amazing." Those are not the words you expect to hear from a leader of the vegetarian movement. But that's how Graham Hill, founder of the sustainability website Tree Hugger, feels about the fleshier components of his diet. He is a self-described "weekday vegetarian", a compromise that came about after years of trying —and failing —to adhere to a strictly vegetarian diet.For the past year, Hill has preached the cause of partial vegetarianism to help fight global warming. According to the UN, the livestock industry produces 18% of the world's green house gases. Part-time vegetarians, also known as flexitarians, choose what to eat and when. The popular Meatless Monday movement, which began in 2003, has been backed by many celebrities, including Paul McCartney, who has spearheaded(率先) his own Meat Free Monday campaign. Last year the Belgian city of Ghent picked Thursday as its Veggieday, calling for meat-free options to be served that day in schools and public institutions.The drive to avoid eating meat on certain days is not new. Catholics have long been urged to abstain(自我克制) on Fridays. But environmentalists have only recently caught on. "The surge is due to a sense of a plateau. You've already reached out to the base of strict vegetarians, and it's hard to get beyond those numbers," says Peter Singer, a Princeton philosophy professor and the author of Animal Liberation. "People should go further, but it's progressed in the right direction."Although the American Dietetic Association (ADA) doesn't track the number of part-timers, the group says roughly 2.5% of Americans are strictly vegetarian, a diet that poses no health risks as long as practitioners get enough protein from beans and other nonmeat sources. "A partial-vegetarian plan is a little more user-friendly," says Dawn Jackson Blatner, a flexitarian and ADA spokesperson.The goal for many activists is simply to get more people to eat less meat. "Absolute purists should be living in a cave," says Ingrid Newkirk, president of People for the Ethical Treatment of Animals (PETA). "Anybody who witnesses the suffering of animals and has a glimmer of hope of reducing that suffering can't take the position that it's all or nothing. We have to be pragmatic. Screw the principle."1. The first quote of the passage is intended to show thatD.A) sushi and steak are both Hill's favorite foodB) the vegetarian movements are popularC) Hill isn't a qualified leader of the vegetarian movementD) it's difficult to be a strict vegetarian2. What is said about Graham Hill?CA) He doesn't eat meat only on weekdays.B) He doesn't want to be a strict vegetarian.C) He is an environmentalist.D) He failed to lose weight.3. Why does Paul McCartney support the Meatless Monday movement?AA) He wants to help fight global warming.B) He'd like to take this to promote his popularity.C) He is a Catholic avoiding eating meat on Mondays.D) He is an advocate of protecting animals.4. What can be inferred from Paragraph 4?BA) Part-time vegetarians account for nearly 2.5% of Americans.B) A fully vegetarian diet may have no bad effect on health.C) Partial vegetarians are healthier than strict vegetarians.D) Many celebrities are part-time vegetarians.5. According to Ingrid Newkirk,C .A) people should adhere to a strictly vegetarian dietB) everybody should act to fight global warmingC) a partial-vegetarian plan works more sensiblyD) people should stop eating meat since it's bad for health正确答案：D；C；A；B；C学生答案：D；C；A；B；C简答题题型：简答题主观题分值30分难度：中等得分：261C6. Translation. Translate the following passage into Chinese.When women work for women, a different dynamic often takes over. Susan, a cashier in a Toronto auction house, says that she has explored friendships with some of her female bosses and feels she can rely on them more. While women may feel more at ease with a female boss, men often have to make concessions to the new working styles. Brian, a marine biologist, says, "It took me a couple of years before I felt comfortable enough to relax around a female manager. In fact, my relations with her were much more businesslike."正确答案：当女性为女上司工作时，往往会用一种不同的工作和交流方式。
市场营销学实践部分考核作业完整版-答案全
综合测试题综合测试题一一、单项选择题（本大题共30小题，每小题1分，共30分）在每小题列出的四个备选项中只有一个是符合题目要求的，请将其代码填写在题后的括号内。
错选、多选或未选均无分。
1．企业奉行“消费需求导向”的原则，是贯彻（B ）A．推销观念B．市场营销观念C．产品观念D．生产观念2．企业在调整业务投资组合时，对某些问号类业务单位，欲使其转入明星类单位，宜采取哪种战略？（ C ）A．保持B．收割C．发展D．放弃3．如果企业的市场占有率为100％，即企业成为独占者时，企业潜量与市场潜量相比（B ）A．大于B．等于C．小于D．无法比较4．假设消费者的货币收入不变，如果物价下跌，则消费者的实际收入（A ）A．增加B．减少C．不变D．可能增加，也可能减少5．消费者购买决策过程的顺序通常为（A ）A．引起需要一收集信息一评价比较一决定购买一购后行为B．引起需要一评价比较一收集信息一决定购买一购后行为c．收集信息一评价比较一引起需要一决定购买一购后行为D．决定购买一引起需要一评估比较一收集信息一购后行为6．一些连锁超市强调“天天平价”，吸引了很多精打细算的顾客，这种市场定位的依据是（C ）A．使用者定位B．使用场合定位C．顾客利益定位D．竞争定位7．人们装修房屋购买地板时，实质上购买的是对美好家庭生活的追求，这是地板的（A ）A．核心产品B．期望产品C．潜在产品D．形式产品8．我国洗衣机行业正处于成熟期，生产厂家可以采取（D ）A．集中策略B．收缩策略c．快速撇脂策略D．调整营销组合9．企业选择复用包装策略的目的是（C ）A．节约成本B．方便顾客购买和使用C．通过给消费者额外利益而扩大产品销售D．避免某一商品推销失败而影响其他商品的声誉10．有些企业利用消费者以数字认识的某种心理将价格定在整数水平以下，使消费者产生便宜感和信赖感。
这种定价策略属于（C ）A．差别定价B．声望定价C．尾数定价D．招徕定价11．某商店经营以下四类产品，适宜采用声望定价是（B ）A．小食品B．高档化妆品C．儿童服装D．文具用品12．以下关于渠道冲突的论述中，正确的一项是（D ）A．垂直渠道冲突是指同一渠道层次中各企业间的冲突B．渠道冲突是有害的，必须努力消除C．水平渠道冲突更为普遍D．渠道冲突不同于渠道竞争13．所要求的服务水平越高，则订购点（A ）A．越高B．越低C．不变D．无法判断14．企业销售人员在访问推销过程中可以亲眼观察到顾客的反应，并揣摩其心理，不断改进推销陈述和推销方法，最终促成交易。
南开大学22春“信息安全”《软件工程与软件测试技术》作业考核题库高频考点版(参考答案)试题号3
南开大学22春“信息安全”《软件工程与软件测试技术》作业考核题库高频考点版（参考答案）一.综合考核(共50题)1.系统成本只包括开发成本。
()A.正确B.错误参考答案：B2.增量模型本质上是一种()。
A.线性顺序模型B.整体开发模型C.非整体开发模型D.螺旋模型参考答案：C3.循环测试要覆盖含有循环结构的所有路径是不可能的。
()A.正确B.错误参考答案：A4.数据流图的基本目的它描述系统由哪几部分组成，各部分之间的联系等，以直观的图形清晰地描述了系统数据的流动和处理过程。
()A.正确B.错误参考答案：AA.正确B.错误参考答案：B6.自返关联不属于类间关联。
()A.正确B.错误参考答案：B7.Jackson 方法根据()来导出程序结构。
A.数据流图B.数据间的控制结构C.数据结构D.IPO图参考答案：C8.面向对象程序设计中，基于父类创建的子类具有父类的所有特性属性和方法，这一特点称为类的()。
A.多态性B.封装性C.继承性D.重用性参考答案：C9.下列错误的是()。
A.尽量不使用数据耦合B.少用控制耦合和标记耦合C.限制公共环境耦合的范围D.完全不用内容耦合10.()是表达系统类及其相互联系的图示，它是面向对象设计的核心，是建立状态图、协作图和其他图的基础。
A.部署图B.类图C.组件图D.配置图参考答案：B11.分层DFD是一种比较严格又易于理解的描述方式，它的顶层图描述了系统的()。
A.细节B.输入与输出C.软件的作者D.绘制的时间参考答案：B12.详细设计阶段的基本任务是()A.确定每个模块所采用的算法B.确定每个模块所使用的数据结构C.确定每个模块的接口细节D.为每个模块设计出一组测试用例参考答案：ABCD13.在折中方案中设置的优先级一般是模糊的。
()A.正确B.错误参考答案：AA.正确B.错误参考答案：A15.以下属于面向对象的设计语言的是()。
A.FORTRAN语言B.Pascal语言C.C语言D.Java语言参考答案：D16.需求分析的主要方法有()。
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综合测试题线性代数（经管类）综合试题一（课程代码4184 ）一、单项选择题（本大题共10小题，每小题2分，共20分）在每小题列出的四个备选项中只有一个是符合题目要求的，请将其代码填写在题后的括号内。
错选、多选或未选均无分。
a n a12 a13 _2a n 3a n - -a12 a i31.设D= a21a22a23=M工Q 则D1=-2a21 3a21 - -a22 a23a31a32a33-2為3a31 - _ a32a33(B )A. —2MB.2MC.—6MD.6M2. 设A、B、C为同阶方阵，若由AB = AC必能推出B = C,贝S A 应满足(D ).A. ASB. A = O CJ A |= 0 D. | A|M03. 设A, B均为n阶方阵，贝S ( A ).A. |A+AB|=0,贝S |A|=0 或|E+B|=0 B.(A+ B)2=A2+2AB+ B2C.当AB=O 时，有A=O 或B=OD.(AB)-1=B-1A-1(a b、4二阶矩阵A= , |A|=1,则A-1= (B ).2 d丿d b、r d _b、 a _b > a bA. BJ C. D.<c a 丿V_c a 丿(—c d 丿ic d 丿5. 设两个向量组::||| 与-:-JH - t，则下列说法正确的是A. 若两向量组等价，则s = t .B. 若两向量组等价，则r（：：、川：飞）=r（出-1）C. 若s = 1，则两向量组等价.D. 若心「: s）= dll 11），则两向量组等价•6. 向量组:.:JU : s线性相关的充分必要条件是（C ）.A. - - ?||| :s中至少有一个零向量B. = = III；s中至少有两个向量对应分量成比例C. : : :III - s中至少有一个向量可由其余向量线性表示D. s可由一「川匚s-i线性表示7. 设向量组〉i「2,...,〉m有两个极大无关组〉i1,〉i2,…,〉ir与ji/' j2,.../' js，则下列成立的是（C ）.A. r与s未必相等B. r + s = mC. r = sD. r + s > m8. 对方程组Ax = b与其导出组Ax = o,下列命题正确的是（D ）.A. Ax = o有解时，Ax = b必有解.B. Ax = o有无穷多解时，Ax = b有无穷多解.C. Ax = b无解时，Ax = o也无解.D. Ax = b有惟一解时，Ax = o只有零解.丄2片x2_ X3 = 09. 设方程组X2 kx^0有非零解，则k = ( D ).x-i x2=0A. 2B. 3C. -1D. 110. n阶对称矩阵A正定的充分必要条件是(D ).A. |A|>0B.存在n阶方阵C使A=C T CC.负惯性指标为零D.各阶顺序主子式均为正数二、填空题(本大题共10小题，每小题2分，共20分)请在每小题的空格中填上正确答案。
错填、不填均无分。
11. 四阶行列式D中第3列元素依次为-1, 2, 0, 1，它们的余子式的值依次为5, 3, -7, 4,贝S D = -15 .12若方阵A满足A2 = A,且A^E，则|A|= _______ .113若A为3阶方阵，且| A b-，则|2A|= _4____________ .‘10 -1 2、14设矩阵A= 2 -1 -2 6的秩为2,则t = _-3 _____.<3 1 t 4」15设向量：=(6, 8, 0), ：=(4 , 3 5),则C / )= ____ .16设n元齐次线性方程组Ax = o, r(A)= r < n,则基础解系含有解向量的个数为n-r 个.17设:=(1 , 1, 0)，:尸(0, 1, 1), ：3=(0, 0, 1)是R3的基,则1 =(1 , 2, 3)在此基下的坐标为(1,1,2) ________ .18设A为三阶方阵，其特征值为1, -1, 2,则A2的特征值为19.二次型 f (x 1,x 2,x 3^ 2x f - 3x 2 - x ；2- 4x 1x 2- 2x 2x 3的矩阵 A =(2 -2 0、 -2312 3）2 4相似，贝S A 的特征值为0 3」「1 20.若矩阵A 与B = 0 <0二、计算题（本大题共 6小题，每小题9分，共54 分）一 1 1- x 1 21.求行列式1 1 1 + y 11 1的值.1 1 - y1 + x 111.解： 1 1 -x 11 1 1 1 + y 111 1 1 - y1 + x 1 0 0=xy1 10 0 1 + y 10 1 11 + X 1 1 1 1 -x -x0 01 1y 1 0 0 —■y -y x 0 0 01 1 0 02 2=x y .0 0 y 0 0 0 11(1 1 -r「22.解矩阵方程： -2 1 1X = 3,1 1 1 丿2丿1-n公令A= -2 11 B= 3<1 11」(11 -1 1 0 0"1 -1 1 0 0) 因为(AE )= -21 1 0 1 0 T0 3 -1 2 1 01 1 0 0 1」<0 0 2-1 01」/ 00 1 1/1 11 03 33 30 10 1 1 1 所以A 1 11 12 3 62 3 60 0 11 0111122丿<2223. 求向量组:■=( 1,1, 2, 3 )，:二=(-1,— 1, 1, 1 ), ；=(1,3, 3, 5 ), :=(4,- 2, 5, 6 )的秩和一个极大线性无关组，并将其余向量用该极大无关组线性表示..解：将已知向量按列构成矩阵，并对其进行行变换:由 AX =B ,得:X =A -1B = 1 1、3 3 21 \1 11 3 = 33 60 1 6Z -121 2 12「1 -1 1 4、「1 -1 14、/ T T T1 -13 -20 02 _6©13a 4)=T2 13 50 3 1 -3<3 15 6丿<0 4 2 -6」「1 -11 4、 「1-1 14 、0 07、2_61 1-30 1 0 0TTT■1 1 -30 1-30 0 1 -3<0 0-26 J <0 0 00 丿 <0 0 0 0丿所以，,G2^3^4)=：3,极大无关组为a化卩3；a 47。
1- 笑3.2% — x 2 + X3 + X 4 = 124. a 取何值时，方程组t x i + 2x 2 - X3 + 4x^2有解？并求其通解♦ % + 7x 2 _4x 3 + 11& = a(要求用它的一个特解和导出组的基础解系表示) 解：对方程组的增广矩阵施以初等行变换：_1 1 1 1 "'12 _1 4 2 、 A = 1 2 -1 4 20 -5 3 -7-3<1 7 -4 11a」10 5 _3 7a- 2」「1 2_1 4 2t 0 -53 -7 -3 (0 00 0a - 5 丿若方程组有解，则r( A ) = r(A )，故a=5. 当a=5时，继续施以初等行变换得:1 6 4A 5 5 5 3 7 3-3 - 3，原方程组的同解方程组为:5 5 50 0 01 0A T 0 10 04 1 6 x i 飞-5X3-5X 4{,X 3,X 4为自由未知量，令X 3=X 4=0,得原方程组的3 3 7X2V 齐一訐5 0 <01 6X 1 = _ 5 X 3 _ 5 X 4\ ,x 3,x 4为自由未知I 3 7X^5X ^5X 4一个特解:与导出组同解的方程组为: 量，令 X 31 5 3 5 1 分别取6 57 5 0 所以, 0?1」,得到导出组的基础解系:方程组的全部解为:丿 甘 '、、1)r 6)------ 15 55 33 7|+ C1-+ C 255 5 01 0 6<0丿< 1」其中，c i ，C 2为任意常数.v二2 0 025. 已知A= 1 2 -1，求 A 的特征值及特征向量，并判断 A< 1 01」能否对角化，若能，求可逆矩阵 P ,使P -AP = A （对角形矩阵）.解：矩阵A 的特征多项式为：扎-20 0|^E —A 卜 -1 Z - 21 =（九 一2）2（丸一1）, -1丸—1对于=2，求齐次线性方程组（2 E- A ） x = o 的基础解系,矩阵A 的对应于特征值2的全部特征向量为:（-1 0 0、「10 0E_ A = -1 -1 1T0 1 -1 ,得基础解系：11-1 0 0 丿<0 0 0 ；l1丿求齐次线性方程组（E- A ） x = o 的基础解系,,从而矩阵 所以，A 的特征值为:「0 0 0雲d 0 -n 2E - A = -1 0 1 T 0 0 0<-1 0 1」<0 0 0」■Z 1A 1 J0 O<1>1q 1 + C 2 0c 1,c 2不全为零o<1>A 的对应于特征值 ^1的全部特征向量为：c（廿0）.得基础解系: ,从而 对于3=1,26.2 2 2f (x 1,x 2,x 3) =2冷 - x 34X 〔X 2 - 4X ]X 3 - 4x 2x 3解：f (x 1,x 2,x 3) = x f 2x 2 - x ； 4%x 2- 4X 〔X 3 - 4x 2x 32 2 2 2 2二[X i 4X I (X 2 _ X 3) 4(X 2 _ X 3) ] _ 4(X 2 _ X 3) + 2X 2 - X 3 _ 4X 2X 3 =(x 12x 2- 2x 3)2 - 2x 2 4x 2x 3- 5x ；2 2 2 2= (X i 2X 2 - 2X 3)- 2(X 2 - 2X 2X 3 X 3)- 3X 32 2 2= (X i 2X 2 -2X 3)-2(X 2 -X 3)-3X 3.z0 1 0'[2 0 0、1 所以，A 相似于对角矩阵，且P =1 0 1 ,A = 02 0.<0 1 b<0 0 1」因为三阶矩阵A 有三个线性无关的特征向量3©11、i = X i 2x2 - 2x 令^2= ^2 - X3目3=兀X i = % - 2 讨2，即x^-y2 y 3 ,X3=出得二次型的标准形为: 2 2 2yi - 2y2 - 3y3 .四、证明题（本大题共6分）27.设向量：1 =(1,-1,1),：2 = (1,1,1),：3 = (0,0,1)，证明向量组m3是R3空间中的一个基.1 1证：因为t 11 1 0 = 020 = 2工0，所以a 1a2a31线性无关，所以向量组2/- 3是R3空间中的一个基.线性代数（经管类）综合试题二（课程代码4184 ）一、单项选择题（本大题共10小题，每小题2分，共20 分） 在每小题列出的四个备选项中只有一个是符合题目要求的， 请将 其代码填写在题后的括号内。