综合英语(三)第一次作业(语法30题)
综合英语（三）（高/专）第一次作业（语法30题）题目1
Equipped with modern facilities, today's libraries differ greatly from _______.选择一项：
反馈正确答案是：those of the past
题目2
The young _______ eaten up almost everything on the table.
选择一项：
反馈正确答案是：have
题目3
Our house is about a mile from the railway station and there are not many houses _______.
选择一项：
反馈正确答案是：in between
题目4
The car accident happened at _______crossroads a few metres away from______bank.选择一项：
反馈正确答案是：the; the
题目5
If Mary ___shopping this afternoon, please ask her to write a shopping list first.选择一项：
反馈正确答案是：goes
题目6
His salary as a driver is much higher than ________.
选择一项：
反馈正确答案是：that of a porter
There _______a basketball match this afternoon.
选择一项：
反馈正确答案是：is going to be
题目8
The electric fan has blown away the terrible smell in the hall, ______?选择一项：
反馈正确答案是：hasn't it
题目9
Miss Wang wanted to know _______for the film.
选择一项：
反馈正确答案是：why he was late
The old lady is quarrelling as if she ______ mad.
选择一项：
反馈正确答案是：were
题目11
My wallet is nowhere to be found. I ____ in the store.
选择一项：
反馈正确答案是：must have dropped it 题目12
Nobody _________to smoke in the cinema.
选择一项：
反馈正确答案是：is allowed
The young lady coming over to us _____ our English teacher; the way she walks tells us that!
选择一项：
反馈正确答案是：must be
题目14
How ______ you say that you really understand the whole story if you have covered only part of the article?
选择一项：
反馈正确答案是：can
题目15
Are you going to fix the car yourself, or are you going to have it _______?
选择一项：
反馈正确答案是：fixed
Do you know ________ in English?
选择一项：
反馈正确答案是：how to say it
题目17
No matter _____, the little sisters managed to round the sheep up and drive them back home safely.
选择一项：
反馈正确答案是：how hard it was snowing
题目18
I don't know _______ to deal with such matter.
选择一项：
反馈正确答案是：how
Mathematics ________ study or science of numbers.
选择一项：
反馈正确答案是：is
题目20
The policeman gave the thief a blow in ___________ stomach.选择一项：
反馈正确答案是：the
题目21
You needn't make such a funny noise, _______?
选择一项：
反馈正确答案是：need you
- Nancy was badly injured in the accident yesterday and she was sent to hospital. - Oh, really? I_________. I ________ visit her.
选择一项：
反馈正确答案是：didn't know; will go to
题目23
-- What's his mother like? -- ______.
选择一项：
反馈正确答案是：She's tall and thin
题目24
When the railway is completed, we ____ get to town much easily.
选择一项：
反馈正确答案是：will be able to
I was giving a talk to a large group of people, the same talk I __________to half
a dozen other groups.
选择一项：
反馈正确答案是：had given
题目26
She _______ 100 pages of the book today.
选择一项：
反馈正确答案是：has already read
题目27
It was a great pleasure ________ me to be invited to the party.
选择一项：
反馈正确答案是：for
The wild flowers looked like a soft orange blanket _____ the desert.选择一项：
反馈正确答案是：covering
题目29
I am not used to speaking ____ public.
选择一项：
反馈正确答案是：in
题目30
There ________ a book and some magazines on the desk.
选择一项：
反馈正确答案是：
(完整word版)学术综合英语课后答案解析
Unit 1 C 1.The younger generation should continue to sustain and develop our fine traditions and long-standing culture. 2.In the course of preparing one’s speech, one should be clearly aware of how one could make effective use of statistics and examples to bolster one’s point of view. 3.An impromptu speech is one of the speaking skills that college students should learn and develop through practice. 4.By using simile and metaphor, you can make your language more vivid and more attractive to your audience. 5.The proper examples you cite might help reinforce the impression on your listeners and make your viewpoints more convincing. 6.When you are speaking, you should choose common and easy words and at the same time avoid clutter in your speech.
社会学概论第三次作业及答案
注：请20分钟以保存一次。每大题完成后请先保存再更换大题，试卷试题全部完成后提交。浏 览器请采用兼容模式。 第1大题 第2大题 第3大题 16小题，每小题2分，共32 分。（总分32.00） 1.中国城乡二元结构的核心是（ 2.00分） A. 二元就业制度 B. 二元教育制度 C. 二元福利保障制度 D. 二元户籍制度 2.( )是经济制度的核心容（ 2.00分） A. 分工 B. 契约 C. 市场和计划 D. 产权 3.( )是社会制度的主体（ 2.00分） A. 组织系统 B. 策略系统 C. 知识系统 D. 设施系统 4.( )具有极鲜明的政治色彩。（2.00分） A. 亚洲型城市 B. 欧洲型城市 C. 美国型城市
D. 中东型城市 5.按照世界通常标准，基尼系数在( ) 属于正常状态。（2.00分） A. 超过0． 4 B. 达到0． 6 C. 0．3以下 D. 0．3～0．4之间 6.( )以工商业市民为主体，功能上具有多样性，城市结构极为复杂。（2.00分） A. 亚洲型城市 B. 中东型城市 C. 美国型城市 D. 欧洲型城市 7.按照婚姻形式的不同，家庭可以分（2.00分） A. 父权家庭、母权家庭和平权家庭 B. 一夫一妻，一夫多妻以及一妻多夫 C. 核心家庭和扩大家庭 D. 父系制、母系制和双系制 8.在中国，( )阶层之间的边界开始形成（2.00分） A. 20世纪80年代 B. 20世纪70年代
C. 21世纪开始 D. 20世纪90年代 9.( )把人们分成白领和蓝领两个阶级。（2.00分） A. 林德的两个阶级模式 B. 马克思的阶级模式 C. 米尔斯的阶级模式 D. 三个阶级理论 10.在美国和加拿大的中部和西部地区，那里的农村社区大都由( )而来。（2.00分） A. 社会组合 B. 自然起源 C. 群体运动 D. 农村建设 11.( )是经济制度的调节方式。（2.00分） A. 产权 B. 市场和计划 C. 分工 D. 契约 12.按照世界通常标准，基尼系数( )就算进入警戒状态。（2.00分） A. 0．3～0．4之间
语法综合测试100题
中考语法综合练习 一、用所给动词的适当形式填空: 1、Tom (be) in Paris since 2 years ago. 2、I (be) to the Great Wall twice. 3、My uncle (be) in this city for many years. 4、We (visit) our teacher already. 5、 May (go) home yet? 6、He (read) the book 3 times. 7、They just (leave) the farm. 8、She (not play) football these days. 9、My friend (see) the film before. 10、He never (meet) a foreigner. 11、He (give) you the answer as soon as he (come) back. 12、There (be) a meeting tomorrow. Please (come) on time. 13、My mother (work) for 3 years. 14、 (be) there much snow last winter? No, there (not). 15、We (start) at 10 if it (stop) raining. 16、The plane (take off) in a moment. 17、It (rain) for 3 days. There are too much rain is year. 18、How long you uncle (live) in Beijing.
大学英语第三次作业
第三次在线作业 单选题 (共40道题) 收起 1.（ 2.5分） – Can I help you? --__________. ? A 、I want that blue dress. ? B 、 OK. ? C 、That’s OK. ? D 、I can help you. 我的答案：A 此题得分：2.5分 2.（2.5分） – What else do you want? -- ___________. ? A 、Nothing else. ? B 、I’m fine. ? C 、What do you want? ? D 、It doesn’t matter. 我的答案：A 此题得分：2.5分 3.（2.5分） – What kind of room do you want? -- _____. ? A 、Room 1. ? B 、I have no idea. ? C 、I want a single room. ? D 、I’m sorry. 我的答案：C 此题得分：2.5分 4.（2.5 分） – Have you made a reservati on? -- ____________. ? A 、Yes, I have. ? B 、I did. ? C 、Yes, I will. ? D 、Thank you. 我的答案：A 此题得分：2.5分 5.（2.5分） – Excuse me, where can I che ck out? -- ____________. ? A 、At the reception desk. ? B 、You’re welcome. ? C 、Nice to see you. ? D 、When you are ready. 我的答案：A 此题得分：2.5分 6.（2.5分） – I really enjoyed the concert. -- _______. ? A 、What will you do tomorrow? ? B 、I’m glad to hear that. ? C 、It’s my pleasure. ? D 、I’m sorry to hear that. 我的答案：B 此题得分：2.5分 7.（2.5分） – What do you think of this concert? -- ________. ? A 、I don’t think so.
学术综合英语unit1_5课后习题答案解析
Task 2 A contrary to implicit assertion look up adapted Sustain unbiased In the course of metaphor clutter B bolster credible impromptu sparingly anecdote Credentials testimony hypothetical paraphrase juxtaposition Task 3 Translation B.发言提纲是有效发言的基础。通过写发言提纲，你可以确保你的思想是相关联的，你的思路从一点谈到另一点，你的讲话结构是连贯的。通常，准备讲演你可以采用两种提纲方式：详细准备提纲和简单发言提纲。 在准备发言提纲中，应该写出你的特定目的及中心思想，并以连贯的方式确定主要观点和次要观点，发言提纲应该由简要的提要组成，这些提要在你讲话时能够给予你一些帮助。发言提纲还应该包括帮助你记忆的重点词或重点短语。在写发言提纲时，可采用准备提纲的模式，尽可能使你的发言提纲简要，同时，要确保提纲清晰，易于辨认。 C. 1. The younger generation should continue to sustain and develop our fine traditions and long-standing culture. 2. In the course of preparing one’s speech, one should be clearly aware of how one could make effective use of statistics and examples to bolster one’s point of view. 3. An impromptu speech is one of the speaking skills that college students should learn and develop through practice. 4. By using simile and metaphor, you can make your language more vivid and more attractive to your audience. 5. The proper examples you cite might help reinforce the impression on your listeners and make your viewpoints more convincing. 6. When you are speaking, you should choose common and easy words and at the same time avoid clutter in you speech. 7. When you write a paper, citing the views from some experts is a good way to make your ideas more credible. 8. A good method of delivering a speech will improve its quality and will help convey the speakers’ ideas clearly and interestingly. 9. You should mot blindly use a word that you are not sure about, and if you are not sure, look up the word in a dictionary. 10. Your language should adapt to the particular occasion and audience. If your language is appropriate in all respects, your speech is successful. D. Before you deliver an academic speech, you should, first of all, get well prepared for it. Then, you should make your major points clear in your speech, and your speech should be well organized. When speaking, you should not speak too fast, and your language should be exp licit. Don’t always read the notes you prepared beforehand. From time to time, you should look at your audience. On one hand, you can show your respect to your audience, and on the other hand, you will be able to go on with your speech more smoothly.
天津大学在线作业做题答案管理学(第三次作业) -
天津大学在线作业-管理学-第三次作业 作业答题结果 题目正确答案你刚刚晋升为车间主任，在你被提升之前，车间生产平稳发展，但现... B 企业在挑选人才的时候一定要本着候选者越多越好的原则，最大可能... B 人力资源管理中认为，既有企业中没有用好之人，也有本身无用之人... B 在极为有利的情况下，人际关系型的领导者是有效的领导者。 B 参与型的领导是设定富有挑战性的目标，并期望下属发挥他们的最佳... B 在企业人力资源管理过程中，针对某个空缺的职位，对申请者进行有... C 确立目标是（）工作的一个主要方面 A 最基本的，又是比较简单的结构形式是（） A 组织变革的阻力是消极的，应该坚决予以杜绝。 B 事业部制的优点之一是高层权力比较分散。 B 本次作业总分
作业答题结果 题目正确答案下列那一项没有正确描述现代绩效管理 A 在极为有利的情况下，人际关系型的领导者是有效的领导者。 B 判断一个组织分权程度的主要依据是： D 从组织工作角度看，下面哪种情况会造成组织工作的窒息? D 在人员的配备中，以下哪一条不是需要考虑的人员配备原则： A 一个管理者如果想在管理生涯中获得成功一定要在一个工作岗位上做... B 企业在挑选人才的时候一定要本着候选者越多越好的原则，最大可能... B 某公司高层决策者对人力资源部提出目标，要求经过努力必须在一定... D 领导效率的高低和领导工作的成功与否是由领导行为本身决定的。 B 领导者是激发他人自己找到解决问题的方法，而管理者是解决问题以... A 本次作业总分 作业答题结果
题目正确答案人力资源区别于其他物质资源的一个最重要的特定，就在于它是一种... A 领导者是激发他人自己找到解决问题的方法，而管理者是解决问题以... A 领导者的职位影响力与其本人的素质条件有一定的关系。 B 职业生涯规划因一般只是涉及到个人，一般只是对员工具有重要意义... B 从组织工作角度看，下面哪种情况会造成组织工作的窒息? D 人力资源管理中认为，既有企业中没有用好之人，也有本身无用之人... B 你刚刚晋升为车间主任，在你被提升之前，车间生产平稳发展，但现... B 一个管理者如果想在管理生涯中获得成功一定要在一个工作岗位上做... B 人力资源管理中最难建立、最难操作的是有效的员工绩效评价。 A 下列那一项没有正确描述现代绩效管理 A 本次作业总分 作业答题结果
小学语法综合测试题
语法综合测试题 一、按要求写出下列各词的不同形式（15分）： book（复数）happy（副词）big（比较级） I（名词性物主代词）he(形容词性物主代词) good（副词） us（主格）quickly（形容词）heaviest（原级） potato（复数）interesting（比较级）she（宾格）come（动词-ing形式）read（过去式）carry（第三人称单数） 二、单项选择（50分）： （）1.We have some but we need some . A. tomatos ; potatos B. tomatoes ; potatos C. tomatoes ; potatoes D. tomatos ; potatoes ( ) 2. sun is bigger than moon. A. / ; / B. A ; a C. the ; the D. The ; the ( ) 3.I have egg and apple for breakfast. A. a ; a B. an ; an C. a ; an D. an ; a ( ) 4.Can you tell about the story? A. I B. me C. my D. mine ( ) 5.This is book, is on the shelf. A. I ; you B. my ; yours C. mine ; yours D. my ; your ( ) 6.Those boxes are too . A. heavy B. heavily C. heavier D. heaviest ( ) 7.Monday is day of the week. A. two B. the two C. the second D. second ( ) 8.He studies very well he studies hard. A. but B. so C. if D. because ( ) 9.-----How do you go to school? ------ bus. A. On B. For C. By D. In ( ) 10.-----May I borrow your ruler? ------Y es, you . A. can B. may C. need D. must ( ) 11. They in the same class now. A. is B. are C. was D. were
英语2第三次作业答案
课程名称：英语Ⅱ(1) 作业标题：第三次记分作业 答题说明： 一、单选题 1、We have our house ________ every week by a cleaner. clean 2、— Nice weather, isn’t it --- _____. ’m not sure know it well , it is , it isn’t 3、It is very convenient ________ here. live 4、-- Hello, could I speak to Don please -- _____. are you ’s the problem you Jane ’s speaking 5、— What’s the problem, Harry --- _____. problem trouble at all
you for asking me about it can’t remember where I left my glasses 6、I don’t want you to make any trouble, _________, I urge you to solve the problem. the contrary as 7、— Which language do you speak at home -- _____. speak English very well can speak English and French is my mother tongue , most of the time 8、The bedroom needs __________. decorate 9、— Do you think the exam will be put off -- _____. good news exam is difficult likely was put off yesterday 10、— Let’s take a walk. -- _____. , let’s , thanks , please , thank you 11、He, as well as I, __________ a student.
第三次测试练习题及答案(练习题3-1-2)
单项选择 ================================================== 1.题号：3835 以下程序的输出结果是 min() {int n[6]={1,2,3,4},i,j,k=2; int sum=0, min; min = n[0]; for(i=0;i<6;i++){ sum += n[i]; if( min>n[i] ) min=s[i]; } pritnf("%d,%d\n",sum, min); } A、10,1 B、6,1 C、10,0 D、0,0 答案： C 1.题号：3553 若有以下定义和语句: int a[15]={1,2,3,4},x; 则对a数组元素非法引用的是(). A、x=a[a[2]]; B、x=a[a[7]-1]; C、x=a[a[2]-1]; D、x=a[a[7]+1];
B 2.题号：3640 以下程序段给数组所有的元素输入数据,请选择正确答案填入(). #include
初中英语语法综合练习-填空和选择各100题
初中英语语法综合练习 一、用所给词的适当形式填空： 1.Please make ______for my bike.(room) 2.The beautiful scenery of Qingdao ______a large number of people to visit every year.(attract) 3.Our room is on the eleventh floor. What about ______?? (you) 4.Summer is the ______ season of the year.? (hot) 5.We must ______our classroom clean and tidy every day.(keep) 6. ______of Chinese are looking for ways to learn English well before Beijing 2008 Olympic.(thousand) 7.The book is rather interesting. It's ______reading again.（worth） 8.Thank you for ______me your dictionary. I'll return it to you soon.(lend) 9.Hard work brings ______.(successful) 10.We should do something to stop waste water from ______rivers and seas.（pollute） 11.The old man put on his sweater and ______out alone.(go) 12.One of the ______comes from South Africa.（science） 13.I think I can do ______in French this year than last year. （well） 14.After three ______study, we worked out the physics problem.（month） 15. I went upstairs and ______at the door. (knock) 16.The children are playing ______in the park. (happy) 17.Her brother enjoys ______very much. (surf) 18.I have ______a seat on the plane, but the flight was canceled.(book) 19.She lay______for hours thinking over her business.(wake) 20.Please turn to another ______. I don't like this show. (channel) 21."Help! Help! I ______!"the little boy cried in the river.(dead) 22.There is a big difference between you and ______.(I) 23.He often ______speaking English with foreigners.(practice) 24.We have some problems______there.(get) 25.Katy thinks ______in town is more exciting than in the country.(live) 26.I heard her ______when I walked past her room.(sing) 27.Telll me the ______number, don't use "about"or "or so".(exactly) 28.We lived in a place ______Gum Tree. (call) 29.My daughter says he's feeling even______today.(ill) 30.The weather gets warmer, and the days get ______. (long) 31.In which country is the weather most like ______?(China) 32.----Jim, have you written a letter to your aunt? ?? ----Yes, Mum. I ______ one last week.(write) 33.Look at the sign:"No ______!". I am afraid you can't smoke here.(smoke) 34.Don't keep me ______for a long time.(wait) 35.The police have caught the thief who matches the man's ______.(describe) 36.Help ______to some fish, children.(you) 37.You'd better go to see the doctor and have your bad teeth______out. (pull) 38.Bad luck!I had my purse______.(steal) 39.The cars made in America are much cheaper than ______in Germany.(that) 40.John became a doctor after he ______up.(grow) 41.The match ______in the league last month was wonderful.(hold) 42.I am sure that our team will ______theirs.(beat) 43.Both of the two rulers are______. I want to buy a third one.(break) 44.----This digital camera is really cheap! ?? ----The cheaper, the ______. I am short of money , you see.(good) 45.How long has your mother ______here?(be) 46.All the students are busy______ ready for the coming exam.(get) 47.The children looked ______.(happy)
综合英语(一)第三次作业(交通大学)
1. Mary felt really _______ when she failed again in the driving test. 选择一项： a. frustrated b. satisfied c. neglected d. achieved 2. The machines _________ every two months. 选择一项： a. checked b. are checked c. are being checked d. are checking 3. This new organization was established to ________ the friendly relationship betwe en the two countries. 选择一项： a. promote b. intend c. raise d. explore 4. Kevin, you ____ leave all your books on the floor like this! 选择一项： a. mustn’t b. needn’t c. would rather not d. wouldn’t 5. Last year I __________ many movies. 选择一项： a. have watched b. watch c. had watched d. watched 6. —Paul, this is my friend, Alice. —___________. 选择一项： a. How do you like the party?
第三次作业题目及答案
第三次作业 一．填空题（20分） 1．劳伦斯曲线是用来衡量_______________________________________________ ______________的曲线。 2．衡量社会收入分配平均程度的曲线称为____________________________曲线，根据这种曲线计算出的反映社会收入分配平等程度的指标是_________________________________。 3．劳动的供给曲线是一条______________________________的曲线。 4．利息是___________________这种生产要素的价格。 5．个人收入减去_____________________________等于个人可支配收入。 6．国民生产总值以___________________________________为统计标准，国内生产总值以________________________________为统计标准。 7．平均消费倾向与平均储蓄倾向之和等于_______，边际消费倾向与边际储蓄倾向之和等于_______。 8．消费函数图中的45°线表示在这条线上任何一点都是____________________ ___________________。 9．总需求曲线是一条向______________________________倾斜的曲线，这表明总需求与物价水平成_________________________变动。 10．根据总需求－总供给模型，总供给不变时，总需求增加，均衡的国内生产总值__________________________，物价水平______________________。 二、单项选择题（20分） 1．劳动的供给曲线（）。 A．向右下方倾斜 B．向右上方倾斜 C．向后弯曲 D．是一条水平线 2．使地租不断上升的原因是（）。 A．土地的供给与需求共同增加 B．土地的供给不断减少，而需求不变 C．土地的需求不断增加，而供给不变 D．土地的供给与需求共同减少
5. 语法综合填空
Ⅳ. 语法填空。(10分) (2019·广东深圳)阅读下面短文，在空格处填入一个适当的词或使用括号中词语的正确形式填空，并将答案填写在答题卡规定的位置上。(共10小题，每小题1分) Jason and Andy are twins. They share a lot of things, including room, food and toys. One Saturday, Jason and Andy went out 46._________ (play) with a toy car. Both of them wanted to be the owner of the car, so they shouted at each other. 47. _________ (They) mother heard the boys arguing. She came out and told them to take turns to play with the toy car, but the twins wouldn’t. A few days later. Mother brought 48. _________ pet dog home. “Can’t we each have our own pet dog?” asked the boys. They were 49. _________ (tire) of sharing everything. “No! The dog must 50. _________ (share).” Mother said. “You will have to feed the dog and make sure it does not get into anythi ng wrong.” Several days later, the dog got into mother’s room 51. _________ (secret) and made a mess there. Jason saw the dog playing with mother’s clothes. He quickly went to find Andy and told him 52.________ the dog had done. “Oh, no! It’s our duty to clean up the mess!” 53. _________ (cry) Andy. The boys picked up the clothes and put them away rapidly. “Just think, Jason,” said Andy, “what a big mess two 54.________ (dog) would made!” “I agree 55. _________ you,” laughed Jason, “Maybe sharing isn’t so bad!” 【答案】46. to play 47. Their 48. a 49. tired 50. be shared 51. secretly 52. what 53. cried 54. dogs 55. with (2019湖北荆门)第二节综合填空(共10小题；每小题1分，满分10分) 阅读下面短文，在空白处填入适当的内容（1个单词）或括号内单词的正确形式（不超过3个单词） Xi'an celebrated the first-ever China Hanfu Day 56 April 18. There were catwalk shows(走秀) and traditional music concerts which 57 (hold) by people wearing traditional Chinese clothing. Hanfu fans from all over China gathered there to take 58 (photo) and put them online for a Hanfu photo competition, which lasted until May 18. China Hanfu Day is on the third day of the third 59 of the Chinese lunar calendar (农历), which is said to be the birthday of the Yellow Emperor. In ancient China, this day was also known 60 Shangsi Festival (上巳节). Its purpose is to encourage young Chinese 61 (take) pride in traditional clothing, as well as Chinese culture. Hanfu is the traditional clothing of the Han people who lived in China before the Qing Dynasty. It has a history of about 3,000 years and it 62 (change) greatly so far. However, some of 63 (it) main characteristics(特点) remain. For example, there are two parts that overlap(交叠) on the front, which is called "jiao ling". Another main characteristic of Hanfu is that it usually uses ribbons (系带) instead of buttons. China is becoming a leading country in the world, and the Chinese public feels more confident(自信的) about its traditional culture 64 ever before. Wearing traditional clothing might be an interesting way of showing 65 they feel about this. 【答案】56. on 57. were held 58. photos 59. month 60. as 61. to take 62. has changed
英语综合作业
假定你是假日酒店的前台工作人员Linda。根据以下内容填写来访客人留言表。内容： 1.来访客人：李华，男，PKK公司总经理助理；联系电话： 2.来访时间：12月20日上午10点 3.被访客人:Mr. John Smith，住假日酒店422房间 4.事由：李华来酒店与Mr. John Smith商谈工作，Mr. John Smith外出 5.留言：李华约Mr. John Smith明天去PKK公司洽谈业务。李华明天上午9： 00驾车来酒店接他；下午安排Mr. John Smith参观公司一条新建成的生产线。 Holiday Inn Visitor’s Message Mr. / Ms. （1) Mr. John Smith Room No. (2) 442 While you were out Mr./ Ms. (3)Li Hua , Assistant to General Manager Of (4) PKK Ltd Telephone (5) □Telephoned √Came to see you □Will call again □Will come again □Asked you to call back Message: (6) Li Hua who has invited you to discuss business with him tomorrow at PKK company will pick you up at the hotel, 9 o’clock in the morning. Next , He will show you around a new assembly line of the company. Clerk (7) Linda Date (8) December 20th Time (9) 10 .
本科第三次作业答案
本科第三次作业 （第十六周课程讲完之后交，用学院统一的作业纸书写，学院文印室有卖，要求抄题。）1.一个系有多个学生，每个学生只能在一个系注册；一个学生可以选修多门课程，每门课 程可以有许多个学生选修。用一个ER图表示“系”、“学生”、“课程”的数据联系。 2.设对乐曲的采样频率是每秒44 100次，采样值用32位表示。计算录制1小时的音乐需 要的多少存储容量？ 存储容量=44100×32×3600/(8×1024×1024)=605.6M 3.显示器的解像度为1024×768位，每个像素的颜色要用16个位来表示，计算一幅画面 需要多少个字节来存储。 显示器的解像度为1024×768位，每个像素的颜色要用16个位来表示，计算一幅画面需要多少个字节来存储。需要字节数=1024×768×16/8=1572864 4.数据管理技术的发展经历了那几个阶段？ 数据管理技术的经历了3个阶段，即：人工管理阶段、文件系统阶段和数据库系统阶段。 5.数据库技术的主要特点是什么？ 数据库系统的主要特点是：(1)数据的结构化、(2)数据的共享性、 (3)数据的独立性、(4)数据的完整性、(5)数据的灵活性、(6)数据的安全性。 6.教材202页第4题。描述波形音频和MIDI音乐的区别？ 波形音频和MIDI音乐的区别：与声音波形相比，MIDI数据不是声音而是指令，所以它的数据量要比波形声音少的多。MIDI可在多媒体应用中与其他波形声音配合使用，形成伴奏的效果。MIDI声音尚不能做到在音质上与真正的乐器完全相似，无法模拟出自然界中其他乐曲类声音。 7.教材202页第6题。多媒体数据为什么可以压缩？视频标准有哪些？ 由于多媒体数据为中的相关性很强，并且有大量的冗余信息，当人们采用适当的压缩方法后，可以得到很大的压缩比。常用的视频标准有：AVI、DVAVI、 8.教材202页第7题。简述数据加密和解密的工作原理是什么？ 加密的工作原理是发送对数据进行伪装，即使这些数据被窃取，非法用户得到的也是一对杂乱无章的垃圾数据，不能获得任何信息。解密的工作原理合法用户接收导数据后，通过事先指定的处理方法将这些数据还原为原始数据。 9.教材202页第8题。什么样的计算机程序被称为计算机病毒？计算机病毒具有哪些特
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