第2课小海龟画图习题答案

第2课小海龟画图习题答案

(1)P9页试一试

?CS

?FD 100

?BK 50

?LT 90

?FD 50

?BK 100

?HT

(2)P10页显身手

TO SHANG

RT 90

FD 120

BK 60

LT 90

FD 100

BK 50

RT 90

FD 50

END

(3)P10页显身手

TO TIAN

FD 100 RT 90 FD 100 RT 90 FD

100 RT 90 FD 100 RT 90

FD 50 RT 90

FD 100 BK 50

LT 90 FD 50 BK 100

END

(4)P10页显身手

TO AO

FD 90 RT 90

FD 45 RT 90 FD 45 LT 90 FD 60

LT 90 FD 45 RT 90 FD 45

RT 90 FD 90

RT 90 FD 150

END

(5)P11页试一试

?CS

?RT 30 FD 90

?RT 120 FD 90

?RT 120 FD 90

(6)P11显身手

TO QIZI

FD 100

RT 120

FD 50

RT 120

FD 50

END

(7)P11显身手

TO XIAOSHAN

RT 30 FD 90 RT 120 FD 90

LT 120 FD 60 RT 120 FD 60

LT 120 FD 30 RT 120 FD 30

RT 120 FD 180

END

(8)P11显身手

TO FENGCHE

FD 70 RT 120 FD 140 RT 120

FD 70 RT 120 FD 140 RT 120

FD 70 RT 120 FD 140 RT 120

END

《认识小海龟》教学设计

《初识LOGO》教学设计 德积小学符海珊 一、教材分析 本课是一节PCLOGO的入门课,通过生动的例子,展现LOGO的魅力,在这个基础上,学习LOGO的界面基本操作以及隐龟、显龟、前进、后退、清屏复位、退出这几个基本命令,为以后更深入地学习LOGO语言打下基础。 二、学情分析 学生在此之前,已经熟练掌握了窗口的操作及文字输入,对几何图形的概念,如角度、长度等也进行过较为系统的学习,在此基础上学习这门专为儿童而设计的LOGO语言很符合五年级学生的知识水平,有利于学生了解人与计算机的对话原理,培养学生的思维能力和创新能力,为以后在信息技术领域的长足发现打下基础。 这一节课,是开启LOGO语言学习的第一课,尽管要掌握的技能少而简单,但却是非常重要的一课,是否能引起学生的学习兴趣,成为较技能目标外一个同样重要的目标,因为,在教学设计方面,特别采用生动形象的故事情节贯穿整个教学过程,用浅显生动的语言来让学生理解较为抽象的概念。使学生产生浓厚的学习兴趣。另外,还注重了良好学习习惯的形成,特别是小组合作学习方面,形成互相研究、互相帮助、互相检查,互相欣赏、互相监督的学习氛围,让学生不单单掌握操作技能,而且学会学习的方法,培养良好的学习习惯和正确的、负责任的信息技术素养,这节课在教学过程中主要运用了任务驱动、自主探究、小组合作等教育方法,让学生在学习中勇于尝试,主动发现问题,解决问题。 三、教学目标及重点难点 1、知识与技能 (1)学会启动和退出Pc Logo。 (2)认识Pc Logo的界面。 (3)学会打开和运行Pc Logo程序。 (4)学会隐龟HT、显龟ST、前进FD、后退BK、清屏复位CS命令的使用。 2、过程与方法 (1)通过运行指挥小海龟画出神奇图形的过程,初步让学生掌握与小海龟沟通的方法。 (2)懂得运用Logo命令指挥小海龟隐身、现身、前景和后退。 (3)初步让学生掌握Logo程序设计的思维方式与实现方法。 3、情感态度与价值观 (1)充分调动学生的积极性,让学生去发现问题、分析问题和解决问题。 (2)引导学生思考、探索,让学生感受Logo语言的神奇魅力,激发学生的学习兴趣。 (3)培养学生细心谨慎的良好学习态度和习惯。增强团结互助的团队精神,形成互助学习的良好学习氛围。 四、教学重难点 重点:掌握隐龟HT、显龟ST、前进FD.后退BK、清屏复位CS命令的使用。 难点:隐龟HT、显龟ST、前进FD.后退BK、清屏复位CS命令的灵活运用。

有趣的Logo语言--小海龟画图

有趣的Logo语言 最近有些同学总在抱怨Logo语言很难,尤其是用重复命令画图,不知道该从哪里下手。其实Logo语言是很有趣的。下面我们就一起来看看我的小海龟画得这些画(图1),漂亮吧! (图1) 想知道这些画是怎么画出来的吗?画图之前我们先来分析一下。这些图形仔细看看都有一定的规律,都是一些相似的基本图形旋转一周的组成的,所以我们只需要找到其中的规律并且算出需要旋转的次数就可以了。下面我们就一起来画。 (图2) 这个图形(图2)是由图中的红色部分旋转10次组成的。 首先我们先来画出长方形的三条边,为了方便后面的绘制,长方形的第二条边我们用后退命令来画;fd 50 rt 90 fd 25 lt 90 bk 50 其次,画完后右转一周的十分之一;fd 50 rt 90 fd 25 lt 90 bk 50 rt 360/10 最后利用重复命令重复10次。Repeat 10[fd 50 rt 90 fd 25 lt 90 bk 50 rt 360/10]

(图3) 这个图形(图3)是由图中的红色部分旋转8次组成的。 首先我们先画出正方形的三条边;fd 50 rt 90 fd 50 rt 90 fd 50 其次,画完后右转一周的八分之一;fd 50 rt 90 fd 50 rt 90 fd 50 lt 360/8 最后,利用重复命令重复8次。Repeat 8[fd 50 rt 90 fd 50 rt 90 fd 50 lt 360/8] (图4) 这个图形(图4)是由图中的红色部分旋转五次围成的,其中红色部分又是由一条直线与一个等边三角形组成,我们可以重复命令画出这个等边三角形,然后再用重复命令重复5次完成图形的绘制。所以一共需要用到两次重复命令。 首先我们先来画出基本图形中的直线;fd 50 其次用重复命令画出基本图形中的三角形;fd 50 repeat 3[fd 50 rt 120] 再次将小海龟右转一周的五分之一;fd 50 repeat 3[fd 50 rt 120] rt 360/5 最后利用重复命令重复5次。Repeat 5 [fd 50 repeat 3[fd 50 rt 120] rt 360/5] (图5) 这个图形是由8个等边三角形旋转8次围成的,其中的等边三角形我们可以使用重复命令完成,然后再利用重复命令重复8次完成图形的绘制。所以一共用到了两次重复命令。 首先我们先利用重复命令完成基本图形等边三角形的绘制:repeat 3[ bk 50 lt 120] 其次我们要让小海龟后退30步并右转一周的八分之一,准备画下一个三角形:repeat 3[bk 50 lt 120] bk 30 rt 360/8 最后我们需要让小海龟重复前面的步骤8次就可以了:repeat 8[repeat 3[bk 50 lt 120] bk

新视野大学英语第二册(第二版)课后翻译原题与答案

01. 她连水都不愿喝一口,更别提留下来吃饭了。 She wouldn't take a drink, much less would she stay for dinner. 02. 他认为我在对他说谎,但实际上我讲的是实话。 He thought I was lying to him, whereas I was telling the truth. 03. 这个星期你每天都迟到,对此你怎么解释? How do you account for the fact that you have been late every day this week? 04. 他们利润增长,部分原因是采用了新的市场策略。 The increase in their profits is due partly to their new market strategy. 05. 这样的措施很可能会带来工作效率的提高。 Such measures are likely to result in the improvement of work efficiency. 06. 我们已经在这个项目上投入了大量时间和精力,所以我们只能继续。 We have already poured a lot of time and energy into the project, so we have to carry on. 07. 尽管她是家里的独生女,她父母也从不溺爱她。 Despite the fact that she is the only child in her family, she is never babied by her parents. 08. 迈克没来参加昨晚的聚会,也没给我打电话作任何解释。 Mike didn't come to the party last night, nor did he call me to give an explanation. 09. 坐在他旁边的那个人确实发表过一些小说,但决不是什么大作家。 The person sitting next to him did publish some novels, but he is by no means a great writer. 10. 他对足球不感兴趣,也从不关心谁输谁赢。 He has no interest in football and is indifferent to who wins or loses. 11. 经理需要一个可以信赖的助手,在他外出时,由助手负责处理问题。 The manager needs an assistant that he can count on to take care of problems in his absence. 12. 这是他第一次当着那么多观众演讲。 This is the first time that he has made a speech in the presence of so large an audience. 13. 你再怎么有经验,也得学习新技术。 You are never too experienced to learn new techniques. 14. 还存在一个问题,那就是派谁去带领那里的研究工作。(Use an appositional structure.) There remains one problem, namely, who should be sent to head the research there. 15. 由于文化的不同,他们的关系在开始确实遇到了一些困难。 Their relationship did meet with some difficulty at the beginning because of cultural differences. 16. 虽然他历经沉浮,但我始终相信他总有一天会成功的。 Though he has had ups and downs, I believed all along that he would succeed someday. 17. 我对你的说法的真实性有些保留看法。 I have some reservations about the truth of your claim. 18. 她长得并不特别高,但是她身材瘦,给人一种个子高的错觉。 She isn't particularly tall, but her slim figure gives an illusion of height. 19. 有朋自远方来,不亦乐乎?(Use "it" as the formal subject.) It is a great pleasure to meet friends from afar. 20. 不管黑猫白猫,能抓住老鼠就是好猫。(as long as) It doesn't matter whether the cat is black or white as long as it catches mice. 21. 你必须明天上午十点之前把那笔钱还给我。 You must let me have the money back without fail by ten o'clock tomorrow morning. 22. 请允许我参加这个项目,我对这个项目非常感兴趣。 Allow me to take part in this project: I am more than a little interested in it. 23. 人人都知道他比较特殊:他来去随意。(be free to do sth.) Everyone knows that he is special: He is free to come and go as he pleases. 24. 看她脸上不悦的神色,我似乎觉得她有什么话想跟我说。 Watching the unhappy look on her face, I felt as though she wished to say something to me. 25. 他说话很自信,给我留下了很深的印象。(Use "which" to refer back to an idea or situation.)

新视野大学英语4册第二版课后习题答案.doc

新视野大学英语(第2版)第4册Unit 1答案 III. 1. idle 2. justify 3. discount 4. distinct 5. minute 6.accused 7. object 8. contaminate 9. sustain 10. worship IV. 1. accusing... of 2. end up 3. came upon 4. at her worst 5. pa: 6. run a risk of 7. participate in 8. other than 9. object to/objected V 1. K 2. G 3. C 4. E 5. N 6.0 7.1 8. L 9. A 10. D Collocation VI. 1. delay 2. pain 3. hardship 4. suffering 5. fever 6. defeat 7. poverty 8. treatment 9. noise 10. agony Word building VII. 1. justify 2. glorify 3. exemplifies 4. classified 5. purified 6. intensify 7. identify 8. terrified VIII. 1. bravery 2. jewelry 3. delivery 4. machinery 5. robbery 6. nursery 7. scenery 8. discovery sentence Structure IX. 1. other than for funerals and weddings 2. other than to live an independent life 3. other than that they appealed to his eye . . ` 4. but other than that, he'll eat just about everything . 5. other than that it's somewhere in the town center X. 1. shouldn't have been to the cinema last night 2. would have; told him the answer 3. they needn't have gone at all 4. must have had too much work to do 5. might have been injured seriously XIII. 1 .B 2.A 3.C 4.D 5. B 6.A 7.B 8.A 9. C 10.A II.D 12.C 13. D 14.A 15. C 16.D 17.B 18.C I9. A 20.D 新视野大学英语(第2版)第4册Unit 2答案 Section A Comprehension o f the text 1. He lived a poor and miserable life during his childhood. 2. Because no one in Britain appeared to appreciate his talent for comedy. His comic figures did not conform to British standards. 3. Because his dress and behavior didn't seem that English. 4. It was the first movie in which Chaplin spoke. 5. He used his physical senses to invent his art as he went along without a prepared script. 6. His transformation of lifeless objects into other kinds of objects, plus the skill with which he executed it again and again. 7. She brought stability and happiness to him and became a center of calm in his family. 8. Comic. Vocabulary III. 1. coarse 2. betrayed 3. incident 4. postponed 5. execute 6. surrounding 7. applause 8. extraordinary 9. clumsy 10. sparked IV. 1. for 2. against 3. up 4. about 5. up 6. to 7. down 8. down 9. in 10. on V. l. I 2.J 3.B 4.D 5.E 6.G 7.F 8.L 9.N 10.A Collocation
VI. 1. service 2. help/hand 3. influence 4. guarantee 5. visit 6. span . 7. welcome 8. spirit 9. duties 10. buildings Word Building

新视野大学英语册第二版课后习题答案全解

Unit 1答案2版)第4册新视野大学英语(第4. but other than that, he'll eat just about everything . 5. other than that it's somewhere in the town center III. X. 1. idle 2. justify 3. discount 4. distinct 5. minute 1. shouldn't have been to the cinema last night 6.accused 7. object 8. contaminate 9. sustain 10. worship told him the answer 。2. would haveIV. 3. they needn't have gone at all 1. accusing... of 2. end up 3. came upon 4. at her worst 5. pa: 4. must have had too much work to do 6. run a risk of 7. participate in 8. other than 9. object to/objected 5. might have been injured seriously 1. 这种植物只有在培育它的土壤中才能很好地成长。Collocation The plant does not grow well in soils other than the one in which it has been VI. developed. 1. delay 2. pain 3. hardship 4. suffering 5. fever 研究结果表明,无论我们白天做了什么事情,晚上都会做大约两个小时2. 6. defeat 7. poverty 8. treatment 9. noise 10. agony 的梦。Word building Research findings show that we spend about two hours dreaming every night, VII. no matter what we may have done during the day. 1. justify 2. glorify 3. exemplifies 4. classified 有些人往往责怪别人没有尽最大努力,以此来为自己的失败辩护。3. 5. purified 6. intensify 7. identify 8. terrified Some people tend to justify their failure by blaming others for not trying their VIII. best. 1. bravery 2. jewelry 3. delivery 4. machinery 我们忠于我们的承诺:凡是答应做的,我们都会做到。4. 5. robbery 6. nursery 7. scenery 8. discovery We remain true to our commitment: Whatever we promised to do, we would sentence Structure do it. 连贝多芬的父亲都不相信自己儿子日后有一天可能成为世界上最伟大的5. IX. 音乐家。爱迪生也同样如此,他的老师觉得他似乎过于迟钝。1. other than for funerals and weddings Even Beethoven's father discounted the possibility that his son would one day 2. other than to live an independent life become the greatest musician in the world. The same is true of Edison, who 3. other than that they appealed to his eye . . ` 1 / 7 seemed to his teacher to be quite dull. sentence structure 当局控告他们威胁国家安全。6. They were accused by the authorities of threatening the state security. X. 1. it is a wonder to find

第1课 认识小海龟——初识logo语言 教学设计

第1课认识小海龟——初识Logo语言教学设计 一、教学对象分析 本课是学生学习Logo语言的入门课程,学生一般是5至6年级的学生。由于在过去的学习中学生从未接触到机械语言等深奥的概念;因而在课堂上,教师应对这部分的内容加以补充。毕竟Logo语言与以往的单纯软件不同,Logo语言比较注重学生思考能力的培养和锻炼。学生只有理解机械语言等概念的基础才能更好地了解Logo语言。 二、教学内容分析 本课主要教学内容是广教版小学《信息技术》教材第三册(下)第1课认识小海龟—初识Logo语言。由于教材内容相应比较集中在Logo语言软件的使用教学上,因而在教学中,教师应该对什么是机械语言以及Logo语言的介绍进行适当的补充,扩展学生的知识面。 三、教学目标 (一)知识性目标 1、通过阅读课本,知道Logo是一种计算机语言,Logo语言中的语句又称为命令; 2、通过老师的讲解、上网搜索的方式,初步了解什么是计算机语言; 3、通过阅读课本,掌握Logo窗口,特别是原点、提示符、绘图窗口、命令窗口的认识; 4、通过学习,让学生知道FD、BK等命令是哪些英语单词的缩写,帮助学生记忆命令。 (二)技能性目标 1、通过学习,学会Logo语言的两种基本打开方式:桌面快捷方式和通过开始菜单打开 2、参照课本图1-4,学会运行Logo程序; 3、初步学会FD、BK、HT、ST、CS等命令,并能运用FD、BK命令绘画线段图形。 (三)情感性目标 1、通过老师对计算机语言的介绍,拓展学生的知识面,激发学生的学习兴

趣。 2、通过让学生输入简单的命令,指挥小海龟不同的方向画出直线,让学生感受到灵活运用知识的作用。 四、教学重点和难点 (一)重点: 1、认识Logo窗口的; 2、掌握Logo的基本命令的写法及其作用。 (二)难点: 1、让学生知道什么是计算机语言;计算机语言的作用是什么? 五、教学环境与资源 计算机 六、教学时间 1课时 七、教学过程 (1)看图激发学习兴趣:1、“最近,老师在上网查阅资料时,在网上找到了一些有趣漂亮的图片,你们想看吗?” 2、“你们知道这些有趣的图形,我们是用什么软件画出来的?” 【在学生回答后,老师告诉学生我们用的软件是什么。】 3、“你们想不想在电脑里也能画出这么有趣的图形。” (2)新授课 1、在我们学习画图之前,我们同学首先要对这个软件有一定的了解,这样我们以后才能更好的画图。 2、Logo语言是一种计算机语言。老师这里有一篇关于Logo语言的介绍,可以帮助同学们更好地了解Logo【课件显示简介,学生阅读,教师适当地向解释什么是计算机语言。】 3、Logo语言就是我们这个学期学习的主要内容;今天是我们的第一节课,我们先来认识一个Logo语言。 【板书:第1课认识小海龟——初识Logo语言】 4、“工欲善其事,必先利其器”下面认识“PC Logo for windows”,这个就是我们学习Logo语言所要用到的软件。老师已经把这个软件安装在电脑上,也把它的快捷方式放置在桌面上。我们同学试一下在桌面上把PC Logo的图标找出来,并把软件打开。

新视野大学英语2册课后题答案

新视野大学英语Book II课后练习题答案 Unit 1 Section A Language focus 3.Words in use 1.condense 2.exceed 3.deficit 4.exposure 5.asset 6.adequate https://www.360docs.net/doc/9119059170.html,petent 8.adjusting 9.precisely 10.beneficial 4.Word building Words learned new words formed -al/ial manager managerial editor editorial substantial substance survive survival traditional tradition marginal margin -cy Consistent consistency Accurate accuracy Efficiency efficient -y Recover recovery Minister ministry assemble assembly 5. 1.editorial 2.recovery 3.accuracy 4.substance 5.managerial 6.margin 7.assembly 8.Ministry 9.survival 10.tradition 11.consistency 12.efficient

6.Banked cloze 1.L 2.C 3.J 4.A 5.I 6.O 7.N 8.E 9.H 10.F 7.Expressions in use 1.feel obliged to 2.be serious about 3.run into 4.distinguish between 5.thrust upon 6.was allergic to 7.get lost 8.be attracted to 9.make sense 10.looked upon as 9.Translate the following paragraph into Chinese. 人们普遍认为英语是一种世界语言,经常被许多不以英语为第一语言的国家使用。与其他语言一样,英语也发生了很大的变化。英语的历史可以分为三个主要阶段,古英语,中古英语和现代英语。英语起源于公元5世纪,当时三个日耳曼部落入侵英国,他们对于英语语言的形成起了很大的作用。在中世纪和现代社会初期,英语的影响遍及不列颠群岛。从17世纪初,它的影响力开始在世界各地显现。欧洲几百年的探险和殖民过程导致了英语的重大变化。今天,由于美国电影,电视,音乐,贸易和技术,包括互联网的大受欢迎,美国英语的影响力尤其显著。 10.Translate the following paragraph into English Chinese calligraphy is a unique art and the unique art treasure in the world. The formation and development of the Chinese calligraphy is closely related to the emergence and evolution of Chinese characters. In this long evolutionary process,Chinese characters have not only played an important role in exchanging ideas and transmitting culture but also developed into a unique art form.Calligraphic works well reflect calligraphers’ personal feeling, knowledge, self-cultivation, personality, and so forth, thus there is an e xpression that “seeing the calligraphers’ handwriting is like seeing the person”. As one of the treasures of Chinese culture, Chinese calligraphy shines splendidly in the world’s treasure house of culture and art. Section B 4.words in use 1.mysterious 2.desperate 3.devise 4.negotiate 5.recalled 6.specifically 7.depict 8.ignorance 9.expand 10.confusion 5.Expressions in use

新视野大学英语第二版第一册课后翻译题目+答案。

一 1、对于网络课程,学生不仅可以选择何时何地地学习,在回答问题之前他们还可以有时间思考答案。(not only...but also...) 2、网上学习的想法使她非常兴奋,而她认为网上学习毫无意义和用处。(while) 3、与以英语为母语的人交谈是非常有益的体验,从中我们能学到许多东西(communicate with) 4、如今,越来越多的人可以利用互联网查找他们需要的信息。(have access to) 5、他要她放弃工作在家照顾孩子,但是她觉得这个要求太过分了。(give up) 6、既然我们已尽学完了这门课程,就应该多做些复习。(now that) 1. Not only can students choose when and where to learn for an online course, but they can also take time to think through answers before making a reply. 2. She is excited by the idea of online learning while be considers it meaningless and useless. 3. Communicating with native English speakers is a very rewarding experience from which we can learn a lot. 4. Today, more and more people have access to the Internet through which they look for the information they need. 5. He wants her to give up working and stay home to look after the children. She feels, however, that this is too much for her. 6. Now that we have finished the course, we shall start doing more revision work. 二 1、当她就要关掉音乐时,她父亲冲进她的房间,朝着她喊道:“难道你就不能把音乐关小一点?” 2、酒吧老板一直在看那个姑娘跳舞,一面却假装没有看。 3、桑迪如此喜欢摇滚以至不顾父亲的反对而将音量放大。 4、像往常一样,当他的父母不喜欢他的穿着时,便开始唠叨他。 5、在会上,他们讨论了如何保持师生间的沟通渠道畅通。 6、一想到这些年幼的男孩和女孩被父母强迫沿街讨钱我就生气。 1. As she was about to turn off the music, her father burst into he room and shouted at her, “Can’t you turn down the music a little bit?" 2. the owner of the bar kept watching the girl dancing while pretending not to. 3. Rock music appealed to Sandy so much that she turned it up, paying no attention to her father’s objection. 4. As usual, when his parents don’t like what he wears, they start bugging him. 5. At the meeting they discussed how to keep the lines of communication open between teachers and students. 6. It makes my blood boil to think of these young boys and girls who are forced by their parents to beg for money along the streets. 三 1、即使报酬并不优厚,我还是觉得接受那个新职位。 2、这项工作在实际开始干之前,一直被认为是十分简单的 3、既然你计划移居加拿大,你就必须努力适应冬季的严寒天气。 4、他承诺帮助我们买下那幢房子,但有点勉强。

六年级下册信息技术教案-11.“小海龟”画图形|华中师大版(新版)

小海龟画图形 一、教学目标 1、使学生熟练使用PC logo软件; 2、使学生学会用PC logo的小海龟制作出等边三角形,正36边形等图; 3、培养学生学习电脑的兴趣,实际动手操作能力和创新能力。 二、教学重点 1、掌握“小海龟画图”全部内容; 2、学会用PC logo的小海龟制作出等边三角形,正36边形等图。 三、教学难点 学会用PC logo的小海龟制作出等边三角形,正36边形等图。四、教学用具 电脑小黑板 五、教学过程 (一)谈话提问,导入新课 老师说:同学们拿出信息技术课本,打开课本。提问上节课,我们学习了什么? 学生答:小海龟画图。 老师问:画了哪些图啊?学生答:等边三角形等图 接着打开幻灯片,回顾知识点:平角等于多少度?等边三角形每个角都是多少度?什么是内外角? (二)出示任务,明确目标

出示(黑板)学习内容,让学生明确学习目标(学习内容与步骤,见板书)。 (三)教师上机操作,学生观看(学生边看幻灯片边观看老师上机操作) 1、启动PC logo软件.. ①分析图形 ②分析小海龟画图的步骤 定起点,定长度:如图1,首先小海龟向前前进100步,确定小海龟旋转的方向(左旋120度),然后前进100步,然后左旋120度,在前进100步。 2,写出画每条线的logo命令. 将分析过程写成logo命令 Fd 100 Lt 120 Fd 100 Lt 120 Fd 100 (其他2个图的分析过程以及命令如图一相似) (四)练习拓展,巩固新知 完成新课任务后,练习与新课相关的内容,巩固新知识。如(小山,风车等) (五)反思体验,课堂小结

这节课我们学习了哪些知识?还有哪些不明白的问题? 六、板书设计 (一)画图的一般过程 1. 分析图形; 2. 确定画图步骤; 3. 写相应命令。 (二)画图的几个关键点 1. 定起点,长度; 2. 掌握好方向; 3. 记牢命令格式。

《小海龟画正五边形》教学设计

《小海龟画正五边形》教学设计及反思 【教学目标设计】 1.知识目标:学会指挥小海龟准确地画出正多边形,学会使用变量命令。 2.能力目标:通过编程练习,培养严谨、认真、科学的编程习惯,提高计算能力、思维能力和推理能力。 3.情感目标:在独立思考的基础上,同学之间相互协作,以组为单位相互竞赛,养成积极进取的学习习惯。 【教学重点、难点】 教学重点:变量的功能及格式。 难点:1、让学生自己“悟”出重复命令中的内容 2、重复次数和重复内容间的关系。 教具:1张大纸,做表格,板书用。 【教学对象分析】 本节课是和华师版小学信息技术第四册下册第4课的内容,学生在此以前学会了LOGO 的基本命令。这节课命令形式从单一命令到复合命令,命令功能从一步操作到多步操作,学生的认识过程也从形象过度到抽象,学生对LOGO语言有更多的认识,更深刻的理解。【教学方法】 任务驱动法、启发式教学法、发现教学法。 【教学过程】 一、游戏,激趣导入 师:我找一个同学和老师一起表演游戏。同学们注意观察。 师:我下命令,这个同学按我命令行走。前进100步,向右转90度,前进100步,向右转90度,前进100步,向右转90度,前进100步,向右转90度。 师:发现这个同学走了个什么图形? 现在展示的就是画正四边形的命令组,仔细观察这四组命令有什么共同点? 生:全部都是重复的,一样的命令。 师:计算机应该给我们方便、快捷的服务,这样重复输入你感觉怎么样?有没有更好、更方便的方法一次完成这些操作呢?LOGO中就有这样的命令,好,看老师的。repeat 4 [fd 100 rt 90] 老师棒不棒?学习完这节课,你会发现,原来你自己也非常棒。 师:今天这节课我们就学习logo中的重复命令省时省力来画图。 板书:省时省力来画图 二、教授新知 出示四条。 师:仔细看这命令,你发现这四条命令与老师输入的一条命令有什么相同点不同点?生:重复了4次,中括号里的内容是一样的。 师:我们重复了4次,重复这个单词就是REPEAT。 输入命令时要注意什么呢?中括号。 师:好,自己试一试,感受一下重复命令的魅力。

新视野大学英语读写教程第二版课后习题答案1-4册

新视野大学英语(第2版)第1册Unit1答案 III. 1. rewarding 2. communicate 3. access 4. embarrassing 5. positive 6. commitment 7. virtual 8. benefits 9. minimum 10. opportunities IV. 1. up 2. into 3. from 4. with 5. to 6. up 7. of 8. in 9. for 10.with V. 1.G 2.B 3.E 4.I 5.H 6.K 7.M 8.O 9.F 10.C Sentence Structure VI. 1. Universities in the east are better equipped, while those in the west are relatively poor. 2. Allan Clark kept talking the price up, while Wilkinson kept knocking it down. 3. The husband spent all his money drinking, while his wife saved all hers for the family. 4. Some guests spoke pleasantly and behaved politely, while others wee insulting and impolite. 5. Outwardly Sara was friendly towards all those concerned, while inwardly she was angry. VII. 1. Not only did Mr. Smith learn the Chinese language, but he also bridged the gap between his culture and ours. 2. Not only did we learn the technology through the online course, but we also learned to communicate with friends in English. 3. Not only did we lose all our money, but we also came close to losing our lives. 4. Not only do the workers want a pay increase, but they also want reduced working hours. 5. Not only is the house expensive, but it is also too far away from my company. Translation VIII. 1. Not only can students choose when and where to learn for an online course, but they can also take time to think through answers before making a reply. 2. She is excited by the idea of online learning while be considers it meaningless and useless. 3. Communicating with native English speakers is a very rewarding experience from which we can learn a lot. 4. Today, more and more people have access to the Internet through which they look for the information they need. 5. He wants her to give up working and stay home to look after the children. She feels, however, that this is too much for her. 6. Now that we have finished the course, we shall start doing more revision work. IX. 1. 我永远都不会忘记那位老师,是他告诉我学外语是有趣的、有价值的。如果没有他,我的英语说得不会像现在这样好。 2 没有任何其他语言能像英语那样让你感受到多姿多彩的世界文化。有了过硬的英语知识,你就可以体验奇妙的文化之旅。 3. 写作不仅仅要写老师布置的话题,而且要写自己感兴趣的东西,例如,给朋友写电子邮件。 4. 远程教学课程是指授课者与学生通过计算机通信技术进行交流的课程。 5. 英语不但是世界上最有用的语言,也是世界上最易学、易用的语言之一。 6远程教学课程在时间安排上给予学生更多的自由,但与其他课程比,这些课程要求学生有更强的自律能力。Cloze 1. B 2.A 3.B 4.B 5.C 6,C 7.B 8.A 9.a 10.B 11.A 12.A 13.B 14.A 15.B Structured Writing XII. I am proud to say that I succeeded in learning a foreign language. It was a real challenge and, needless to say, it took a lot of practice. I carried a small dictionary with me everywhere I went as well as a notebook in which I listed new words I came across. I also managed my time carefully so that I met the standards of the course and finished assignments on time. After years of persistence, I reaped the benefits of all my hard work. Section B Reading Skills 1. 1.C 2.B 3.D 4. A 5. B Comprehension of the Text II. 1.C 2.A 3.B 4.C 5.D 6.B 7.C 8.D Vocabulary 1. community 2. effective 3. unique 4. committed 5. reinforce 6. perspective 7. explicit 8. challenge 9. hindered 10. arose IV. 1. for 2. with 3. on 4. on 5. on 6. of 7. in 8. up 9. of 10.In

相关文档
最新文档