2019年全国计算机等级考试四级试题及答案(一)
一、选择题：(共90题,分为1分题和2分题,满分120分。除标注2分题外,其它均为1分题。)
(1) 若或非门的输入变量为A和B,输出变量为Y,则A和B分别为下述哪一种情况时, Y才为1?
A) 1,0 B) 0,1 C) 0,0 D) 1,1
(2) 已知寄存器A存有带符号整数且只作算术移位,HA和LA分别代表其位和最低位。寄存器B存有带符号整数且只作逻辑移位,HB和LB分别代表其位和最低位。当寄存器A与B都有左移位发生时,下述哪一个命题是准确的? (2分)
A) LA与LB均成为0 B) LA与LB均成为1
C) LA变成0但LB保持原值 D) LA保持原值但LB的值改变
(3) 下述哪一种情况称为指令周期?
A) 取指令时间 B) 取操作数时间
C) 取指令和执行指令的时间 D) 存储操作结果的时间
(4) 设S是一个至少有两个元素的集合,且定义运算X*Y=X适用于S集中的所有元素X和Y,下列命题中哪一个命题必是真命题?
Ⅰ. *在S集中是可结合的
Ⅱ. *在S集中是可交换的
Ⅲ. *在S集中有单位元
A) 只有Ⅰ B) 只有Ⅱ C) Ⅰ和Ⅲ D) Ⅱ和Ⅲ
(5) 设Z是整数集,且设f：Z×Z→Z,对每一个∈Z×Z,有
f()=m2n。集合{0}的原象为(2分)
A) {0}×Z
B) Z×{0}
C) ({0}×Z)∩(Z×{0})
D) ({0}×Z)∪(Z×{0})
(6) 对于一个只有3个不同元素的集合A来说,A上的等价关系的总数为
A) 2 B) 5 C) 9 D) 取决于元素是否为数值
(7) 设有命题：对于组成元素为集合的集合C,存有函数为f：
C→∪C,使得对每一个
S∈C,有f(S)∈S。
该命题的否命题是
A) 对于集合C,对每个函数f：C→∪C,对每一个S∈C,都有f(S) ∈\ S
B) 对于集合C,存有函数f：C→∪C,使对每一个S∈C,有f(S) ∈\ S
C) 对于集合C,对每一个函数f：C→∪C,存有S∈C,使得f(S) ∈\ S
D) 对于集合C,不存有函数f：C→∪C,使对某些S∈C,没有f(S) ∈\ S
(8) 设(V,E)是一连通的无圈图,V包含
3个3度顶点
2个2度顶点
r个1度顶点
且V不再包含其他元素。E的元素个数为多少? (2分)
A) 6 B) 9 C) 15-r D) 5+5r
(9) 设连通图G的顶点数与边数与一立方体相同,即有8个顶点和12条边。任意一棵G的生成树的总边数为
A) 7 B) 8 C) 9 D) 10 (10) 设图G的顶点为五边形P的顶点,其边为P的边加上另一条连接P的两个不相邻顶点的边。下列命题中哪个(或哪些)命题是真命题?
Ⅰ. G中存有欧拉回路
Ⅱ. G中存有哈密尔顿回路
A) 均不是 B) 只有Ⅰ C) 只有Ⅱ D) Ⅰ和Ⅱ
第11-13题是在已知下述Pascal程序的基础上,并设在程序执行过程中无错误发生。
for h：=1 to n-1 do begin
2009年6月英语四级考试真题与答案真题： Part I Writing (30 minutes) Directions: F or this part, you are allowed 30 minute to write a short essay on the topic of students selecting their lectures. You should write at least 120 words following the outline given bellow: 1. 越来越多的博物馆免费对外开放的目的是什么？ 2. 也会带来一些问题 3. 你的看法？ Free admission to museums Part II Reading Comprehension (Skimming and Scanning) (15 minutes) Directions: In this part, you will have 15 minutes to go over the passage quickly and answer the questions on Answer Sheet 1.For questions 1-7, choose the best answer from the four choices marked A),B),C) and D). For questions 8-10, complete the
sentences with the information given in the passage. How Do You See Diversity? As a manager, Tiffany is responsible for interviewing applicants for some of the positions with her company .During one interview, she noticed that the candidate never made direct eye contact. She was puzzled and somewhat disappointed because she liked the individual otherwise. He had a perfect resume and gave good responses to her questions, but the fact that he never looked her in the eye said “untrustworthy,” so she decided to offer the job to her second choice. “It wasn’t until I attended a diversity workshop that I realized the person we passed over was the perfect person,” Tiffany confesses. What she hadn’t known at the time of the interview was that the candidate’s “different” behavior was simply a cultural misunde rstanding . He was an Asian-American raised in a household where respect for those in authority was shown by averting(避开) your eyes. “I was just thrown off by the lack of ye contact; not realizing it was cultural,” Tiffany says. “I missed out ,but will not miss that opportunity again.” Many of us have had similar encounters with behaviors we perceive
公共营养师四级技能考试题及参考答案（一） 考试时间（120分钟） 一、某大学英语班19-20岁女生20人，晚餐吃水饺。用2500克面粉（标准粉）、5公斤白菜（可食部）、1250克猪瘦肉、250克鸡蛋（可食部）、250克大豆油和100食盐，做成12.5公斤生水饺。1000克生水饺煮熟后重1200克，吃完晚餐后剩生水饺1公斤、熟水饺1.8公斤。按每人吃一样多计算，请回答以下问题。（25分） （1）计算每人吃生水饺多少克？ （2）完成表1第2列，并计算每人吃面粉、白菜、猪瘦肉、鸡蛋和食盐分别是多少？填入表1第3列。 表1. 每人吃水饺所含原料重量（克） 原料名称12.5公斤生水饺所用原 料重量（克）每人吃的生水饺所含原料重量（克） 面粉 白菜 猪瘦肉 鸡蛋 大豆油 食盐（3
并填入表3。 表2. 食物成分表 食物名称 食部 % 能 (K J) 量 (kc al) 蛋白质 (g ) 脂肪 (g ) 碳水化物(g ) 胡萝卜素 (μg) 维生素A (μg) 硫胺素(mg ) 核黄素(mg ) 尼克酸(mg ) 抗 坏 血 酸 (mg ) 钙 (mg ) 铁 (mg ) 锌 (mg ) 面粉(标准粉) 100 1439 344 11.2 1.5 71.5 — — 0.28 0.08 2.0 31 3.5 1.6 白菜 90 88 21 1.7 0.2 3.1 250 0.06 0.07 0.8 47 69 0.5 0.2 猪肉(肥、瘦) 100 1654 395 13.2 37.0 2.4 — 114 0.22 0.16 3.5 6 1.6 2.0 鸡蛋(红皮) 90 653 156 12.8 11.1 1.3 194 0.13 0.32 0.2 44 2.3 1.0 大豆油 100 3671 899 … 99.9 … — … 微 微 13 2.0 1.1 表3. 能量和主要营养素摄入量
英英英英英英 大学生英语四级真题 (共3套) 2018 年6 月英语四级真题一................................................................................................ .. 1 2018 年6 月英语四级真题二 (16) 2018 年6 月英语四级真题三 (31) 2018 年6 月英语四级真题（第1套） Part I Writing (30 minutes) Directions: For this part, you are allowed 30 minutes to write an a short easy on the importance of speaking ability and how to develop it.You should write at least 120 words but no more than 180 words. Part II Listening Comprehension(25 minutes) Section A Directions: In this section, you will hear three news reports. At the end of each news report, you will hear two or three questions. Both the news report and questions will be spoken only once. After you hear questions, you must choose the best answer from the four choices marked A), B), C) and D). Then mark the corresponding letter on Answer Sheet 1 with a single line through the centre. Questions 1 to 2 are based on the new report you have just heard. 1．A) The return of a bottled message to its owner's daughter. B)A New Hampshire man's joke with friends on his wife. C)A father's message for his daughter. D)The history of a century-old motel. 2.A) She wanted to show gratitude for his kindness. B)She wanted to honor her father's promise.
大学英语四级考试真题及答案(绝对完整） Part I Writing (30 minutes) Directions: For this part, you are allowed 30 minute to write a short essay on the topic of students selecting their lectures. You should write at least 120 words following the outline given bellow: 1. 越来越多的博物馆免费对外开放的目的是什么？ 2. 也会带来一些问题 3. 你的看法？ Part II Reading Comprehension (Skimming and Scanning) (15 minutes)Directions: In this part, you will have 15 minutes to go over the passage quickly and answer the questions on Answer Sheet 1. For questions 1-7, choose the best answer from the four choices marked A),B),C) and D). For questions 8-10, complete the sentences with the information given in the passage. How Do You See Diversity? As a manager, Tiffany is responsible for interviewing applicants for some of the positions with her company .During one interview, she noticed that the candidate never made direct eye contact. She was puzzled and somewhat disappointed because she liked the individual otherwise. He had a perfect resume and gave good responses to her questions, but the fact that he never looked her in the eye said “untrustworthy,” so she decided to offer the job to her second choice. “It wasn’t until I attended a diversity workshop that I realized the person we passed over was the perfect person,” Tiffany confesses. What she hadn’t known at the time of the interview was that the candidate’s “different” behavior was simply a cultural misunderstanding . He was an Asian-American raised in a household where respect for those in authority was shown by averting(避开) your eyes. “I was just thrown off by the lack of ye contact; not realizing it was cultural,” Tiffany says. “I missed out ,but will not miss that opportunity again.” Many of us have had similar encounters with behaviors we perceive as different. As the world becomes smaller and our workplaces more diverse, it is becoming essential to expand our under-standing of others and to reexamine some of our false assumptions . Hire Advantage At a time when hiring qualified people is becoming more difficult ,employers who can eliminate invalid biases(偏爱) from the process have a distinct advantage .My company, Mindsets LLC ,helps organizations and individuals see their own blind spots . A real estate recruiter we worked with illustrates the positive difference such training can make .
职业资格全省统一鉴定 公关员四级操作技能试卷 注 意 事 项 1、本试卷依据2001年颁布的《公关员》国家职业标准命制， 考试时间：120分钟。 2、请在试卷标封处填写姓名、准考证号和所在单位的名称。 3、请仔细阅读答题要求，在规定位置填写答案。 一、操作题（第1题～第7题，每题10分，共70分。） 1. 你公司准备举行一个假期集体去海南旅游的活动，请为这次活动写一份海报。
2. 演讲活动是社会组织有计划有目的的公关活动之一。某化妆品公司近期举办了一个“美丽大宣言”的演讲活动。活动结束后，小萧负责善后工作。小萧需要做的工作有哪些 3. 某市市政府新颁布了政府办公用品统一采购的办法，并召开新闻发布会。作为市政府的宣传人员，小王在写新闻发布稿时应注意哪些问题 4. 小悦刚采写了一篇公司新产品促销活动的新闻稿，但是对稿件的标题改来改去一直觉得不满意。请你就新闻标题写作给小悦提供建议。 5. 假如你是一位某公司公关部的职员，准备筹备一次新闻发布会，如何进行新闻发布资料的核实 6. 春节将至，天天公司将举行一个与重要客户联欢的文艺晚会。对于晚会的各项工作应该进行一个分解。如果你是该项目的负责人，请绘制一个分解结构图。 7. 危机发生以后，正是各种小道消息流传的高峰期。经理发现这些小道消息大多数是由内部员工的疑问得不到及时有效的解决而引起的，于是你被任命回答来自员工及亲属的询问。你会怎样完成这个任务呢 二、案例分析（第8题～第9题，每题15分，共30分。）
8. 以下是某公司对自己内部员工教育程度的调查统计表，请结合此表回答相关问题： （1）案例中统计表结构是否完整如不完整，应该如何使之完整 （2）案例中统计图表的横标目和纵标目分别是什么排列是否符合统计表的原则和要求 （3）案例中统计表中的数字存在哪些问题 9. 请阅读下面案例，然后分析并回答下列问题： 福特汽车（中国）有限公司自1995年10月25日进入中国后，不仅拓展在中国的汽车业务，而且以企业公民为己任，致力于推动中国经济、环保等回馈社会之举。
It's such an excitement to hear that you are planning to come to China to teach English. In response to your inquiry concerning the city to choose ,I would like to recommend Beijing to you.Listed below are some details. There are three reasons why I recommend Beijing to you. First of all, Beijing, as the capital of China, has many famous universities and parents also attach great importance to their children's education.Therefore, there is a great demand for excellent foreign teachers. Secondly, Beijing has a large number of English-speaking people which can help you adapt to the new environment faster. What's more，Beijing has abundant educational resources，which means you will have many opportunities to learn the Chinese culture you are interested https://www.doczj.com/doc/d28309490.html,st but not least, Beijing is my hometown,if you come here, we can play together and eat a lot of delicious food. It has been two years since I saw you last time and I can't wait to see you. T aking all the factors into account,I believe that you will have a enjoyable time in Beijing.I f you have any questions I will spare no effort to help you.I am looking forward to your early reply.
2017年12月英语四级真题 Part I Writing(25 minutes) Directions:For this part,you are allowed 30 minutes to write a short essay on how to best handle the relationship between parents and should write at least 120 words but no more than 180 words. Part II Listening Comprehension(25 minutes) Section A Directions:In this section,you will hear three news the end of each news report,you will hear two or three the news report and the questions will be spoken only you hear a question,you must choose the best answer from the four choices marked A),B),C)and D).Then mark the corresponding letter on Answer Sheet 1 with a single line through the centre. Questions 1 and 2 are based on the news report you have just heard.
2017年6月英语四级真题 作文一： For this part,you are allowed 30 minutes to write a short essay based on the picture below. You should start your essay with a brief account of the impact of the Internet on the way people communicate and then explain whether electronic communication can replace face-to-face contact.You should write at least 120 words but no more than 180 words. “Dear Andy-How are you? Your mother and I are fine.We both miss you and hope you are doing well.We look forward to seeing you again the nest time your computer crashes and you come down-stairs for something to eat,Love,Mom and Dad.” 作文二： For this part,you are allowed 30 minutes to write a short essay based on the picture below. You should start your essay with a brief account of the impact of the Internet on learning and then explain why doesn’t simply mean learning to obtain information. You should write at least 120 words but no more than 180 words.
大学英语四级听力题目答案及原文第套资料
Part II Listening Comprehension Section A News Report One 【话题预测】由college students，sleep，problem，stress，psychological 等词可推断，本则新闻与大学生 睡眠或心理健康有关。 【正确答案】1—2 B D 听力原文 You probably think college students are experts at sleeping, but parties, preparations for tests, personal problems and general stress can wreck a student’s sleep habits, which can be bad for the body and the mind. Texas Tech University is even offering a class called “Improving Your Sleep Habits”. People suffering from sleep loss are at an increased risk from obesity, psychological problems and car crashes. Students who don’t get enough sleep have poor attendance and lower grades. On top of all that, a new study published in the journal Learning and Memory finds you are probably better off
四级真题及答案
A Grassroots Remedy Most of us spend our lives seeking the na tural world. To this end, we walk the dog, pl ay golf, go fishing, sit in the garden, drink outside rather than inside the pub酒馆, have a picnic, live in the suburbs在郊外, go to t he seaside, buy a weekend place in the countr y. The most popular leisure休闲的 activity in Britain is going for a walk. And when jogger s (慢跑者) jog, they don’t run the streets. E very one of them instinctively本能的 heads to the park or the river. It is my profound深厚的 belief that not only do we all need nature, but we all seek nature, whether we know we a re doing so or not. But despite this尽管如此, our children ar e growing up nature-deprived (丧失). I spent my boyhood童年 climbing trees on Streatham Co mmon, South London. These days, children are robbed of 被剥夺了these ancient freedoms, due to 由于problems like crime, traffic, the los
大学英语四级真题及答案( 多套题及翻译） CET4 Part I Writing (30 minutes) Directions: For this part, you are allowed 30 minutes to write a short essay on the following topic. You should write at least 120 words but no more than 180 words. 目一：Suppose a foreign friend of yours is coming to visit your campus, what is the most interesting place you would like to take him/her to see and why? 假你的一位外国朋友来参你的校园，你最感趣的地方想他/ 她去看 ?什么 ? 目二：Suppose a foreign friend of yours is coming to visit your hometown, what is the most interesting place you would like to take him/her to see and why? 假你的一位外国朋友来参你的家，你最感趣的地方想他/ 她去看 ?什么 ? 目三：Suppose a foreign friend of yours is coming to visit China, what is the most interesting place you would like to take him/her to see and why? 假你的一位外国朋友来参中国，你最感趣的地方想他/ 她去看 ?什么 ? Part II Listening Comprehension (30 minutes) Section A Directions: In this section, you will hear 8 short conversations and 2 long conversations. At the end of each conversation, one or more questions will be asked about what was said. Both the conversation and the questions will be spoken only once. After each question there will be a pause. During the pause, you must read the four choices marked A), B), C) and D), and decide which is the best answer. Then mark the corresponding letter on Answer Sheet 1 with a single line through the centre. 注意：此部分在答卡 1 上作答。 1.A. See a doctor about her strained shoulder a ladder to help her reach the tea. the cupboard with a new one. the tea on a lower shelf next time. 1. W: I can’t seem to reach the tea at the back of the cupboard 。 M: Oh? Why don’t you use the ladder? You might strain your shoulder 。 Q: What does the man suggest the woman do? 2. A. At Mary Johnson’s B. In an exhibition hall C. At a painter’s studio. D. Outside an art gallery. 2. W: Since it’s raining so hard, let’s go and see the new exhibits 。 M: That ’s a good idea. Mary Johnson is one of my favorite painters 。 Q: Where does the conversation most probably take place?
烟草物流师（四级）技能鉴定试卷答案2 一、仓储管理（共40分） 第一题：物料管理（10分） 1. 简述物料管理的5原则（3分） 物料管理部门应保证物料供应的适时(Right time)、适质(Right quality)、适量(Right quantity)、适价(Right price)、适地(Right place)，这就是物料管理的5R原则，是对任何企业均适用且实用的原则。 2.在物料管理架构实施层面应做好哪些工作？（4分） (1)依存量管理或用料需求计划，进行物料采购、委托外加工、开立内部生产指令等实务工作。 (2)物料进厂时的点收、验货、退回等工作。 (3)进行物料验收后的入库归位，以及账务报表的编制工作。 (4)进行仓库内整理及盘点。 (5)依据生产命令或其他指令进行备料发料作业。 (6)执行其他出入库作业。 3.简述物料搬运的作用有哪些？（3分） （1）提高仓储设施的利用能力 （2）减少货物搬运的次数 （3）建立一个高效安全的工作环境 对物流领域来说，高效的工作环境非常重要，这一目标包含询：多内容，安全性就是其中—项。所有的物料搬运系统，不管是物流部门还是有关生产的部门，都必须在提高生产率的同时保证员工的人身安全，这就要求尽可能减少在仓库中短距离搬运时的体力劳动。 （4）提高物流服务水平 物料搬运作为物流系统的一个子系统，对提高物流系统运作效率、提高服务水平起着重要的作用。 第二题：出入库作业（10分） 1．请简述遇到包装破漏时应采取的处理办法。（5分） 答案：包装破漏问题主要是在储存过程中因堆垛挤压、装卸操作不慎等情况引起的，应根据 货主要求进行处理，如整理、更换包装等，否则造成的损失应由仓储部门承担。 2．请简述先进先出原则。（5分） 先进先出原则，是物料在出库时优先考虑的原则，指的是发出物料时要按物料入库的顺序把先入库的物料先发出去，后入库的物料后发出去，以防止不适当的积压，避免出现物料过期失效现象。 第三题：储存养护（10分） 1.请简述储位管理的方法步骤。（3分）
2019年12月英语四级听力真题原文【完整版】 News 1 A device that weighs less than one kilogram is part of a mission that will allow scientists to deliver fourth generation or 4G mobile coverage to the moon in 2019。 If successful， the tiny device will provide the moon with its first ever mobile phone network。 The lunar network will support high definition streaming of video and data between the moon and earth。 The network is part of a mission to the moon。 This is a project with the goal of landing the first privately paid for mission to the moon。 The 4G mission is set to launch from Cape Canaveral in the United States on a space X Falcon 9 rocket in 2019。 Mission to the moon intends to establish and test the first elements of a communications network on the moon。 The scientists working on the project opted to build a 4G rather than a fifth generation or 5G network。 This is because fifth generation networks are still in testing and trial phases。 This means that a 5G network may not yet be stable enough to work on the moon‘s surface Question 1：What are scientists planning to do? Question 2：Why did scientists choose to set up a 4G network in their mission? News 2 It‘s responded to a fire Wednesday night at an abandoned mall in Heywood。 The fire was reported at 9：26 pm at an old shopping center on Michigan Avenue near St。 Mary’s Church。 Six fire engines， two trucks and two chiefs
2014-2019历年大学英语四级真题及答案 2014年6月大学英语四级考试真题 Part I Writing （30 minutes） Directions: For this part, you are allowed 30 minutes to write a short essay on the following question. You should write at least 120 words but no more than 180 words. Suppose a foreign friend of yours is coming to visit China, what is the first place you would like to take him/her to see and why? Part II Listening Comprehension （30 minutes） Section A Directions: In this section, you will hear 8 short conversations and 2 long conversations. At the end of each conversation, one or more questions will be asked about what was said. Both the conversation and the questions will be spoken only once. After each question there will be a pause. During the pause, you must read the four choices marked A）, B）, C）and D）, and decide which is the best answer. Then mark the corresponding letter on Answer Sheet 1 with a single line through the centre. 1. A）The man should visit the museums. B）She can’t stand the hot weather. C）The beach resort is a good choice. D）She enjoys staying in Washington. 2. A）Her new responsibilities in the company. B）What her job prospects are. C）What the customers’ feedbac k is. D）The director’s opinion of her work. 3. A）Combine her training with dieting. B）Repeat the training every three days. C）Avoid excessive physical training. D）Include weightlifting in the program. 4. A）When she will return home. B）Whether she can go by herself. C）Whether she can travel by air. D）When she will completely recover. 5. A）The woman knows how to deal with the police. B）The woman had been fined many times before. C）The woman had violated traffic regulations. D）The woman is good at finding excuses. 6. A）Switch off the refrigerator for a while. B）Have someone repair the refrigerator. C）Ask the man to fix the refrigerator. D）Buy a refrigerator of better quality. 7. A）He owns a piece of land in the downtown area. B）He has got enough money to buy a house. C）He can finally do what he has dreamed of. D）He is moving into a bigger apartment. 8. A）She is black and blue all over. B）She has to go to see a doctor. C）She stayed away from work for a few days. D）She got hurt in an accident yesterday.
消防管理员（四级） 操作技能鉴定试题评分表及答案 考生姓名：准考证号： 试题评分表 员（签 名）： “评价要素”得分＝配分×等级比值 参考答案：（口试或笔试） 1. 消防安全重点单位对每名员工应当至少每年进行一次消防安全培训。 2. 有关消防法规、消防安全制度和保障消防安全的操作规程；本单位、本岗位的火灾危险性和防火措施；有关消防设施的性能、灭火器材的使用方法；报火警、扑救初起火灾以及自救逃生的知识和技能。 3. 公众聚集场所对员工的消防安全培训应当至少每半年进行一次，培训的内容还应当包括组织、引导在场群众疏散的知识和技能。 4. 下列人员应当接受消防安全专门培训：单位的消防安全责任人、消防安全管理人；专、兼职消防管理人员；消防控制室的值班、操作人员；其他依照规定应当接受消防安全专门培训的人员。 5. 单位应当组织新上岗和进入新岗位的员工进行上岗前的消防安全培训。 6. 组织相关人员定期参加消防专门培训、举办消防安全讲座或集中培训、召开会议、利用板报、画廊以及张贴消防标语、征订消防报刊杂志等形式、利用广播、电视、录像、多媒体等手段、灭火技能竞赛等。 7. 消防安全重点单位制定应制定灭火和应急疏散预案 8. 组织机构；报警和接警处置程序；应急疏散的组织程序和措施；扑救初起火灾的程序和措施；通讯联络、安
全防护救护的程序和措施。 9. 程序一：报、程序二：成立临时救灾指挥部、程序三：通报、程序四：疏散和救护、程序五：组织灭火器材、程序六：安全警戒。 10. 消防安全重点应按照灭火和应急疏散预案的要求，至少每半年进行一次演练，并结合实际，不断完善预案；其他单位按照灭火和应急疏散预案的要求，至少每年组织一次演练。