大学英语综合教程2课件
上海外语教育出版社出版
出版人庄智象
策划牟丽
责任编辑祝芸
校对测试蔡燕萍陈懋上海吾傲数码设计有限公司
顾问莫锦国
制作规划邬宏江
技术支持关健
制作人员卢涛
李茜严孜予
金属晶体练习题
金属晶体练习题 1.金属键的实质是( ) A．自由电子与金属阳离子之间的相互作用 B．金属原子与金属原子间的相互作用 C．金属阳离子与阴离子的吸引力 D．自由电子与金属原子之间的相互作用 2.金属的下列性质与金属晶体结构中的自由电子无关的是( ) A．良好的导电性B．良好的导热性 C．良好的延展性 D．密度大小 3.按下列四种有关性质的叙述，可能属于金属晶体的是( ) A．金属阳离子之间存在斥力 B．金属原子半径都较大，价电子较少C．金属中大量自由电子受到外力作用时，运动速度加快 D．金属受到外力作用时，各原子层容易发生相对滑动，但不会改变原来的排列方式，也不会破坏金属键 4.关于晶体的下列说法正确的是( ) A．在晶体中只要有阳离子就一定有阴离子 B．金属镁、金刚石和固体氖都是由原子直接构成的单质晶体 C．金属晶体的熔点可能比分子晶体的低，也可能比原子晶体的高 D．铜晶体中，1个铜离子跟2个价电子间有较强的相互作用 5.金属晶体堆积密度大，原子配位数大，能充分利用空间的原因是( ) A．金属原子价电子数少 B．金属晶体中有自由电子 C．金属原子的原子半径大 D．金属键没有饱和性和方向性 6.下列金属晶体中，金属阳离子和自由电子之间的作用最强的是( ) A．Na B．Mg C．Al D．K 7.铝硅合金(含硅%)凝固时收缩率很小，因而这种合金适合于 铸造。现有下列三种晶体：①铝；②硅；③铝硅合金。它们的熔 点从低到高的顺序是( ) A．①②③ B．②①③ C．③②① D．③①② 8.关于体心立方堆积型晶体(如图)结构的叙述中正确的是( ) A．是密置层的一种堆积方式 B．晶胞是六棱柱 C．每个晶胞内含2个原子 D．每个晶胞内含6个原子 9.石墨晶体是层状结构，在每一层内，每一个碳原子都跟其他3个 碳原子相结合。据图分析，石墨晶体中碳原子数与共价键数之比为
全大学英语综合教程第二版课题答案全集
【一】全新版大学英语综合教程1课后题 Unit 1 Growing Up Part II Language Focus Vocabulary Ⅰ.1. …down back and on in 2. been assigned to the newspaper’s Paris office. so extraordinary that I didn’t know whether to believe him or not. clear image of how she would look in twenty years’ time. the command the soldiers opened fire. bikes we’ll keep turning them out. 3. , rigid, to inspire tedious, What’s more, out of date ideas , career, avoid showing, hardly hold back Ⅱ. violating Ⅲ. , in upon Comprehensive Exercises Ⅰ. Cloze 1. back
and on out/in 2. Ⅱ. Translation 1. 1.As it was a formal dinner party, I wore formal dress, as Mother told me to. 2.His girlfriend advised him to get out of/get rid of his bad habit of smoking before it took hold. 3.Anticipating that the demand for electricity will be high during the next few months, they have decided to increase its production. 4.It is said that Bill has been fired for continually violating the company’s safety rules. /Bill is said to have been fired for continually violating the company’s safety rules. 5.It is reported that the government has taken proper measures to avoid the possibility of a severe water shortage. /The local government is reported to have taken proper measures to avoid the possibility of a severe water shortage. 2. Susan lost her legs because of / in a car accident. For a time, she didn’t know how to face up to the fact that she would never (be able to) walk again. One day, while scanning (through) some magazines, a true story caught her eye /she was attracted by a true story. It gave a vivid description of how a disabled girl became a writer. Greatly inspired, Susan began to feel that she, too, would finally be bale to lead a useful life. Unit 2 Friendship I. Vocabulary 1. Fill in the gaps with words or phrases given in the box. 1) absolutely 2) available
创新大学英语综合教程答案
创新大学英语综合教程答案
创新大学英语综合教程答案 【篇一：全新版大学英语(第二版)综合教程3答案 unit1-unit8】 ass=txt>unit 1 p3：after listening complete the following statements according to what you have heard. 1.taking a break 2.escaping relief out in the country fast move 3.the pollution of the citysmog 4.changes in the way we live p10: content questions pair work one of you asks the first six questions and the other answers. starting from question7, change roles. when you have finished, the teacher may want to put some of the questions to you to check your progress. 1. write and live on a farm. 2. because they grow nearly all of their fruits and vegetables. they have enough eggs, honey and wood. they are very close to nature and can enjoy the beautiful scenery. besides, they can go skiing and skating in winter. 3. no. sometimes the good life can get pretty tough. 4. they were buried under five feet of snow from december through march.
全新版大学英语综合教程2第二版答案
Unit 1 Key to Exercises Part I Pre-Reading Task Script for the recording: Ways of learning is the topic of this unit. It is also the topic of the song you are about to listen to, called Teach Your Children sung by Crosby, Stills and Nash. Teach Your Children Crosby, Stills and Nash You, who are on the road, Must nave a code that you can live by. And so, become yourselr, Because the past is just a goodbye. Teach your cbildren well, Their lather's hell did slowly go by. And reed them on your dreams, The one they picks, the one you'll mow by. Don't you ever ash them why, ir they told you, you will cry, So just look at them and sigh and know they love you. Appendix I - 93 - And you, oi tender years, Can't know the rears that your elders grew by. Ana so please help them with your youtb, They seek the truth before tbey can die. Teacb your parents well, Tbeir children's bell will slowly go by. And reed them on your dreams, Tbe one tbey picks, tbe one you'll kno w by.
金属晶体计算 教案
金属晶体2 计算 班级：姓名：小组：. 【学习目标】 1.通过复习金属晶体的堆积模型，能说出各模型的名称、配位数、空间利用率； 2.通过分析金属晶体晶胞的剖面图，能计算堆积模型的空间利用率； 3.通过小组讨论，能判断晶体的配位数、粒子数，并计算粒子半径、晶胞体积、密度； 4.通过阅读76页石墨晶体内容，能说出石墨晶体的结构特点。 【重点难点】 重点：金属晶体原子堆积模型的特点；空间利用率的计算 难点：晶胞的半径、体积、密度、空间利用率的计算 【导学流程】 一、基础感知 （一）石墨晶体结合课本76页，完成下列内容 1、石墨晶体中，每个碳原子采取杂化。 2、石墨晶体属于晶体，既有键，又有键，还有。兼具原子晶体、分子晶体、金属晶体的特征 3、石墨分层，层内碳原子通过结合，各层之间以结合，容易滑动，所以石墨质软。 4、石墨中碳原子个数与碳碳键数之比为 . （二）晶胞空间利用率的分析 【铺路搭桥】空间利用率 = 晶胞含有粒子的体积 / 晶胞体积? 100% =V球 /V 晶胞? 100% 1、体心立方堆积如图，在立方体的体对角线上球是相互接触的,假设晶胞边长 为acm，晶胞的体积为，原子半径r，r= a，一个晶胞中平均有 个原子，这些原子的体积总和为，该堆积方式的空间占有率表达式 为。 2、面心立方堆积中，设晶胞边长为a nm，则原子的半径r和边长a的关系为，该堆积方式的空间占有率表达式为。 3、金刚石晶胞如右图：金刚石晶胞中含有个碳原子，若碳原子半径 为r，金刚石晶胞边长为a，根据硬球接触模型，则r= .列式表示 碳原子在晶胞中的空间占有率.（不要求计算结果） 【思考1】清北：GaAs的熔点为1238℃。密度为ρg·cm-3，其晶胞结构如图所示。Ga和As的摩尔质量分别为M Ga g·mol-1和M As g·mol-1，原子半径分别为r Ga pm和r As pm，阿伏加德罗常数值为N A，则GaAs晶胞中原子的体积占晶胞体积的百分率为。 1、金属晶体中的原子堆积方式如图所示，这种堆积方式称为。1 个晶胞所含原子个数。六棱柱底边边长为a cm，高为c cm， 阿伏加德罗常数的值为，的密度为（列出计算式）。2、 已知金属铂晶胞结构如图所示。若铂原子半径为r pm,铂摩尔质量为Mg?mol?1,铂晶体的密度为ρg?cm?3, 则阿伏加德罗常数N A可表示为 mol?1(用有关字母列出计算式即可).
全新版大学英语综合教程教案
Teaching Planning College English Integrated Course Book Three Unit Two The Freedom Givers Zhong wen 1.Background Information Teacher: zhong wen Students: 56 sophomores Content of the textbook: unit-2 text A the Freedom Givers Textbook: foreign language teaching and research press Time duration：10 minutes 2.Textbook Analysis The author tells three stories about the Underground Railroad and early Black civil rights movement. The three stories are chosen because they are representative of all participants in this movement: John Parke r is a freed slave who later turned into a courageous “conductor”; Levi Coffin is a brave white “conductor”; Josiah Henson is a slave who struggled his way to freedom with the help of the Underground Railroad. We learn about the name of Josiah Henson at the beginning of the text, yet his full story is not told until the last part. In this way the author achieves coherence of text. 3.Students Analysis The class is made up of 56 students, with 30 girls and 26 boys ,who have a good knowledge of Basic English, but know very little about the American culture behind the language. So in this introduction part, It is necessary to introduce some background information to the students before reading 4.Teaching Objectives Students will be able to: 1.understand the main idea(early civil-rights struggles in the US, esp. the underground Railroad) 2.grasp the key language points and grammatical structures in the text, 3.conduct a series of reading, listening, speaking and writing activities related to the theme of the unit 4.Appreciate the various techniques employed by the writer (comparison and contrast, topic sentence followed by detail sentences, use of transitional devices,etc.); 5.Teaching Procedures: Greetings Step 1 Lead-in T: Today we are going to talk about the ethic heroes in American history, before the class, I’d like to introduce the slavery to all of you. T: Abraham Lincoln was the 16th president of the United States, during his term of office; he led the civil war and abolished the slavery. T: In the battle against slavery, not only did the president try his best to abolish this system, but also the people, especially the black people living in the South America try hard to fight for their own feat. Today, we will introduce some freedom givers in the American history. Before
大学英语综合教程2
5. Complete the following sentences with phrases or expressions from the passage. 1.The organization provides information on health issues to the public （您未填写此题） 2. what the Minister says, we will learn whether the Government's thinking has advanced.（您未填写 3. I'd like to say a word or two his proposal.（您未填写此题）
4. In response to your advertisement in the Bedfordshire Reporter, I am writing to the post of secretary.（您未填写此题） 5. Our company a 50% increase in production this year.（您未填写此题） Anwser: 1.at large, 2.on the basis of, 3.in support of, 4.apply for, 5.is aiming at 7.Translate the following sentences into English. 1.任何年满18岁的人都有资格投票(vote)。(be eligible to) Answer:Anyone over the age of 18 is eligible to vote. 2.每学期开学前，这些奖学金的申请表格就会由学校发给每一个学生。(apply for, scholarship) A form to apply for these scholarships is sent by the university to each student before the start of each semester. 3. 遵照医生的建议，我决定戒烟。(on the advice of) Answer:On the advice of my doctor, I decided to give up smoking. 4.公园位于县城的正中央。(be located in) Answer:The park is located right in the center of town. 5.这所大学提供了我们所需的所有材料和设备。(facilities) 2.Answer:The university provides all the materials and facilities we desire. 8. Read and compare the English sentences, paying attention to their italicized parts and
金属晶体四类晶胞空间利用率的计算
金属晶体四类晶胞空间利用率的计算 高二化学·唐金圣 在新课标人教版化学选修3《金属晶体》一节中，给出了金属晶体四种堆积方式的晶胞空间利用率。空间利用率就是晶胞上占有的金属原子的体积与晶胞体积之比。下面就金属晶体的四种堆积方式计算晶胞的空间利用率。 一、简单立方堆积： 在简单立方堆积的晶胞中，晶胞边长a等于金属原子半径r的2倍，晶胞的体积V晶胞=(2r)3。晶胞上占有1个金属原子，金属原子的体积V原子=4πr3/3 ，所以空间利用率V原3/ （3×(2r)3）=52.33﹪。 子/V晶胞= 4πr 二、体心立方堆积： 在体心立方堆积的晶胞中，体对角线上的三个原子相切，体对角线长度等于原子半径的4倍。假定晶胞边长为a ，则a2 + 2a2 = (4r)2，a=4 r/√3 ，晶胞体积V晶胞=64r3/ 3√3 。体心堆积的晶胞上占有的原子个数为2，原子占有的体积为V原子=2×（4πr3/3）。晶胞的空间利用率等于V原子/V晶胞=（2×4πr3×3√3）/（3×64r3）= 67.98﹪。 三、面心立方最密堆积 在面心立方最密堆积的晶胞中，面对角线长度是原子半径的4倍。假定晶胞边长为a,则a2 + a2 = (4r)2 ,a = 2√2r ,晶胞体积V晶胞=16√2r3。面心立方堆积的晶胞上占有的原子数为4，原子占有的体积为V原子= 4×（4πr3/3）。晶胞的空间利用率等于V原子/V晶胞=（4×4πr3）/(3×16√2r3)= 74.02﹪.
四、六方最密堆积 六方最密堆积的晶胞不再是立方结构。晶胞上、下两个底面为紧密堆积的四个原子中心连成的菱形，边长a = 2r ,夹角分别为60°、120°，底面积s = 2r×2r×sin(60°) 。晶胞的高h的计算是关键，也是晶胞结构中最难理解的。在晶胞的上、下两层紧密堆积的四个原子中，各有两个凹穴，中间层的原子在上、下两层正对的凹穴中。中间层的原子和上层形成凹穴的三个原子构成一个正四面体；和下层对应的三个原子也构成一个正四面体，这两个正四面体的高之和就是晶胞的高。正四面体的边长为2r,正四面体的高h 1 = 2√2r/√3 。晶胞的高为h = 4√2r/√3，晶胞的体积V晶胞=(2r×2r×sin(60°)×4√2r)/√3 = 8√2r3 。六方最密堆积的晶胞上占有2个原子，原子的体积V原 子= 2×（4πr 3/3）。晶胞的空间利用率为V 原子/V晶胞= （2×4πr 3）/（3×8√2r3 ） = 74.02 ﹪.
全新版大学英语综合教程第二版课后练习答案
全新版大学英语综合教程 第二版课后练习答案 This manuscript was revised on November 28, 2020
Unit1 Ways of Learning Vocabulary I 1. 1)insert 2)on occasion 3)investig ate 4)In retrospect 5)initial 6)phenomen a 7)attached 8)make up for 9)is awaiting 10)not; in the least 11)promote 12)emerged 2. 1)a striking contrast between the standards of living in the north of the country and the south. 2)is said to be superior to synthetic fiber. 3)as a financial center has evolved slowly. 4)is not relevant to whether he is a good lawyer. 5)by a little-known sixteen-century Italian poet have found their way into some English magazines. 3. 1)be picked up; can’t accomplish; am exaggerating 2)somewhat; the performance; have neglected; they apply to 3)assist; On the other hand; are valid; a superior II 1)continual 2)continuous 3)continual 4)continuous 5)principal 6)principal 7)principle 8)principles 9)principal III herself by herself/on her own by yourself/on your own Comprehensive Exercises
全新版大学英语综合教程1(第二版)答案
Unit 1 Growing Up Part II Language Focus Vocabulary Ⅰ. 1. 1.has been assigned to the newspaper’s Paris office. 2.was so extraordinary that I didn’t know whether to believe him or not. 3.a clear image of how she would look in twenty years’
time. 4.gave the command the soldiers opened fire. 5.buying bikes we’ll keep turning them out. 3. 1.reputation, rigid, to inspire 2.for 3.of 4.with 5.as
6.about 7.to 8.in, in 9.from 10.on/upon 2.surprise 3.pulled 4.blowing 5.dressed
6.scene 7.extraordinary 8.image 9.turn 10.excitement company’s safety rules. 5.It is reported that the government has taken proper measures to avoid the possibility of a severe water shortage. /The local government is reported to have taken proper measures to avoid the possibility of a
全新版大学英语(第二版)综合教程2习题答案
Key to Exercises of College English Book 2 Unit 1 ★Text A Vocabulary I. 1.1) insert 2) on occasion 3) investigate 4) In retrospect 5) initial 6) phenomena 7) attached 8) make up for 9) is awaiting 10) not…in the least 11) promote 12) emerged 2. 1) There is a striking contrast between the standards of living in the north of the country and the south. 2) Natural fiber is said to be superior to synthetic fiber. 3) The city’s importance as a financial center has evolved slowly. 4) His nationality is not relevant to whether he is a good lawyer. 5) The poems by a little-known sixteenth-century Italian poet have found their way into some English magazines. 3. 1) be picked up, can’t accomplish, am exaggerating 2) somewhat, performance, have neglected, they apply to 3) assist, On the other hand, are valid, a superior II. 1. 1) continual 2) continuous 3) continual 4) continuous 2. 1) principal 2) principal 3) principle 4) principles 5) principal III. 1. themselves 2. himself/herself 3. herself/by herself/on her own 4. itself 5. ourselves 6. yourself/ by yourself/on your own Comprehensive Exercise I. Cloze 1. 1) contrast 2) exaggerating 3) priority 4) on the other hand 5) promoting 6) pick up 7) assist 8) accomplish 9) on occasion 10) neglecting 11) worthwhile 12) superior 2. 1) end 2) perform 3) facing 4) competent 5) equipped 6) designed 7) approach 8) rest 9) definitely 10) quality II. Translation 1.1) It takes an enormous amount of courage to make a departure from the tradition. 2) Tom used to be very shy, but this time he was bold enough to give a performance in front of a large audience.
大学英语综合教程2复习资料全
Unit 1 Useful Expressions 1. 被系在…上be attached to… 2. 探索行为exploratory behavior 3. 偶尔on occasion 4. 父母的责任parental duties 5. 揭示，阐明throw light on 6. 最终目的an ultimate purpose 7. 要做的动作desired action 8. 所希望的结果desirable outcome 9. 关键critical point 10. 育儿观value of child rearing 11. 弥补某种错误行为making up for a misdeed 12. 回想起来in retrospect 13. 善意的well-intentioned 14. 前来帮助某人come to sb.’s rescue 15. 极其熟练、温和地with extreme facility and gentleness 16. 适用于apply to 17. 发展到evolve to 18. 发展创造力promote creativity 19. 值得追求的目标worthwhile goals . Sentence Translation 1. But one of the most telling lessons Ellen and I got in the difference between Chinese and American ideas of education came not in the classroom but in the lobby of the Jinling Hotel where we stayed in Nanjing. (=然而，我和艾伦获得的有关中美教育观念差异的最难忘的体验并非来自课堂，而是来自我们在南京期间寓居的金陵饭店的大堂。) 2. He probably got as much pleasure out of the sounds the key made as he did those few times when the key actually found its way into the slot. (=他从钥匙声响中得到的乐趣大概跟他偶尔把钥匙成功地塞进槽口而获得的乐趣一样多。) 3. I soon realized that this incident was directly relevant to our assigned tasks in China: to investigate the ways of early childhood education (especially in the arts), and to throw light on Chinese attitudes toward creativity. (=我很快意识到，这件小事与我们在中国要做的工作直接相关：考察儿童早期教育（尤其是艺术教育）的方式，揭示了中国人对创造性活动的态度。) 4. 我的中国同行，除了少数几个人外，对此事的态度与金陵饭店工作人员一样。(= With a few exceptions my Chinese colleagues displayed the same attitude as the staff at the Jinling Hotel.) 5. 但关键在于，在这个过程中，我们试图让本杰明懂得，一个人是能够很好地自行解
全新版大学英语综合教程标准答案全(第二版)
全新版大学英语综合教程答案全(第二版)
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全新版大学英语综合教程4 Text A课后练习答案 Unit One Fighting with the Forces of Nature Part II Text A Vocabulary 1) alliance 2) at the cost of 3) stroke 4) limp 5) minus 6) regions 7) eclarations 8) siege 9) raw 10) bide his time 11) have taken their toll 12) in the case of 2. 1) is faced with 2) get bogged down 3) is pressing on / pressed on 4) drag on 5) get by 6) dine out 7) have cut back 8) get through 3. 1) The rapid advance in gene therapy may lead to the conquest of cancer in the near future. 2) Production in many factories has been brought to a halt by the delayed arrival of raw materials due to the dock workers’ strike. 3) Sara has made up her mind that her leisure interests will/should never get in the way of her career. 4) Obviously the reporter's question caught the foreign minister off guard. 5) The introduction of the electronic calculator has rendered the slide rule out of date / obsolete. 4.1) Being faced with an enemy forces much superior to ours, we had to give up the occupation of big cities and retreat to the rural and mountainous regions to build up our bases. 2)Unity is crucial to the efficient operation of an organization. Failure to reckon with this problem will weaken its strength. In many cases, work may be brought to a halt by constant internal struggle in an organization. 3)The Red Army fought a heroic battle at Stalingrad and won the decisive victory against the Germans. In fact, this battle turned the tide in the Second World War. During this famous battle, the Soviet troops withstood the German siege and weakened the German army by launching a series of counterattacks. II. More Synonyms in Context 1) During the First World War, battles occurred here and there over vast areas. Some of the most dramatic fighting took place in the gloomy trenches of France and Belgium. 2) Elizabeth made careful preparations for the interview and her efforts / homework paid off. 3)1 spent hours trying to talk him into accepting the settlement, but he turned a deaf ear to all
全新版大学英语综合教程1答案
Appendix I Key to Exercises (Units 1-8) Unit 1 Part I Pre-reading Task Script for the recording: Have you ever heard of the pop singer, John Lennon? Here he is singing a song he wrote for his son. It's called Beautiful Boy. Close your eyes Have no rear The monster s tone He's on the run and your daddy's here Beautiful, beautiful, beautiful Beautiful boy Beautiful, beautiful, beautiful Beautiful boy Before you go to sleep Say a little prayer 1 John Lennon (1940-1980): First became famous as a singer and guitarist in the Beatles, a British rock group, writing many of their most successful hits. Later he left the group, but continued to be popular as a singer and songwriter.
Every day in every way It's getting better and better Beautiful, beautiful, beautiful Beautiful boy Beautiful, beautiful, beautiful Beautiful boy Out on the ocean sailing away I can hardly wait To see you come of age But I guess we’ll both just have to be patient ‘Cause it's a long way to go A bard row to hoe Yes it's a long way to go But in the meantime Before you cross the street Take my band Life is what happens to you While you're busy making other plans Beautiful, beautiful, beautiful Beautiful boy Beautiful, beautiful, beautiful Beautiful boy Before you go to sleep Say a little prayer Every day in every way It's getting better and better 1 A hard row to hoe: To hoe is to use a special farming tool, a hoe, to clear small weeds and break up the surface of the soil. The row referred to is a row of plants.