练习一

化学练习册答案选修一【练习一：化学键与分子间力】1. 化学键有哪些类型？答：化学键主要有三种类型：离子键、共价键和金属键。

2. 什么是离子键？答：离子键是指正离子和负离子之间通过静电吸引形成的化学键。

3. 什么是共价键？答：共价键是指两个原子之间通过共享电子对形成的化学键。

4. 金属键的特点是什么？答：金属键的特点是电子在金属原子之间自由移动，形成电子云，使得金属具有导电、导热和延展性等特性。

5. 范德华力是什么？答：范德华力是分子间的一种弱相互作用力，包括色散力、偶极力和诱导力。

【练习二：化学反应速率与化学平衡】1. 影响化学反应速率的因素有哪些？答：影响化学反应速率的因素包括温度、压力、反应物浓度、催化剂以及反应物的表面积等。

2. 什么是化学平衡？答：化学平衡是指在一个封闭系统中，正向反应和逆向反应进行得一样快，反应物和生成物的浓度保持不变的状态。

3. 勒夏特列原理是什么？答：勒夏特列原理指出，如果一个处于平衡状态的系统受到外部条件（如温度、压力或浓度）的改变，系统会自动调整，使得新的平衡状态抵消这种改变的影响。

4. 如何通过改变条件来影响化学平衡？答：可以通过改变温度、压力或反应物和生成物的浓度来影响化学平衡。

【练习三：溶液的酸碱性】1. 什么是pH值？答：pH值是表示溶液酸碱性的一个数值，pH值小于7表示酸性，等于7表示中性，大于7表示碱性。

2. 什么是缓冲溶液？答：缓冲溶液是一种能够抵抗小量酸或碱加入而保持pH值基本不变的溶液。

3. 强酸和弱酸的区别是什么？答：强酸在水中完全电离，而弱酸在水中部分电离，因此强酸的溶液pH值较低，而弱酸的溶液pH值较高。

【练习四：氧化还原反应】1. 什么是氧化还原反应？答：氧化还原反应是指在化学反应中，原子或离子之间发生电子转移的反应。

2. 氧化剂和还原剂的区别是什么？答：氧化剂是能够使其他物质氧化的物质，即它接受电子；还原剂是能够使其他物质还原的物质，即它提供电子。

人教版三年级数学上册第一单元
第3课时《练习一》课后练习题（附答案）
1.下面是阳阳下午放学回家后时间安排情况。

（1）爸爸5:15下班，从单位走回家需要45分钟，他在吃晚饭前（）分钟到家。

（2）阳阳家吃晚饭用了25分钟，他们是（）时（）分吃完晚饭的。

（3）读书时，爸爸和妈妈陪阳阳一起阅读了40分钟，请你在下面的时间轴上用“↓”表示出他们开始阅读的时刻。

2.某旅游景点循环巴士运营时间如下表，每隔30分钟发一次车。

该巴士一天一共发了多少次车？
参考答案
1.（1）5 （2）6 30 （3）
2.（11:20-9:00）÷30分=5（次）（4:20-2:00）÷30分=5（次）5+5=10（次）
答：该巴士一天一共发了10次车。

四上数学练习一姓名：学号：一、读数：184020：（）1567009：（）6302050：（）50060003：（）2060800：（）4302000：（）二、写数：八万九千二百三十：（）五百零三万四千：（）二十五万零七百：（）一百万零五十：（）四千三百零二万三千五百：（）六万八千零一：（）三、写数：九百万、四十万、六万、五千组成的数是（）。

三千万、五万、七百组成的数是（）。

八千万、九十组成的数是（）。

四、用0，0，0，9，8，7，6这七个数字按要求组成七位数。

1、读三个0：（）3、读一个0：（）2、读两个0：（）4、所有的0都不读：（）五、10个一万是（）；10个一千万是（）。

一百万有10个（）；10个（）是一百万。

一亿里面有（）个万。

六、800500600这个数的最高位是（）位，它是（）位数。

“8”表示8个（），“5”表示（）个（），“6”表示（）。

七、在数位顺序表中，从个位起，万位是第（）位，亿位是第（）位。

百万位的右边是（）位，百万位的左边是（）位。

一个六位数的最高位是（）位；最高位是千万位的数是（）位数。

四上数学练习二姓名：学号：例书本p15，省略百位后面的尾数，1843527≈1843500或1843527≈18435百省略千位后面的尾数，1843527≈1844000或1843527≈1844千省略万位后面的尾数，1843527≈1840000或1843527≈184万例2、省略万位后面的尾数，改写成以“万”为单位的数。

7580000＝758万7584410≈758万（不能写成7580000）省略亿位后面的尾数，改写成以“亿”为单位的数。

92000000000＝900亿1295330000≈13亿（不能写成1300000000）1、读数或写数。

三千零六十八万零五百三十五亿六千零二万八千五百（）（）一千一百零九亿零四十万八百零三万零五十（）（）401004002002500050000（）（）20800005000390001540000（）（）2、省略万位后面的尾数，改写成以“万”为单位的数。

邮政营业（初级）练习一一、单选题1. 义务兵免费信件应由相关军事单位逐件以红色加盖总参谋部统一制发的（）三角形戳记。

A. 义务兵B. 义务兵免费C. 义务兵免费信件D. 免费2. 以下关于邮政职业道德内容的理解，表述错误的是（）。

A. 邮政从业人员应具有：热爱邮政的忠心、奉献邮政的诚心、发展邮政的信心B. 员工是邮政企业的一分子，是邮政企业持续、稳定发展的基础C. 邮政企业也是员工生存和发展的依赖，他们是互相依存、互相促进的关系D. 西藏自治区藏族女邮递员尼玛拉木是践行邮政职业道德的典范3. 五笔字型汉字输入法中，末笔字型识别码即根据“（）分区，字型判位”。

A. 字根所在键B. 字型C. 笔画D. 键名字4. 以下姓氏拼音错误11的是（）。

A. 长孙（zhǎng sūn）B. 子车（zǐjū）C. 羊舌（yáng shé）D. 缑亢（hóu kàng）5. 国家对邮政企业提供邮政（）给予补贴。

A. 普遍服务、规范服务B. 普遍服务、特殊服务C. 普遍服务、优质服务D. 普遍服务、星级服务6. 下列邮件中，不属于国内普通邮件的是（）。

A. 平常信函B. 印刷品专袋C. 平常印刷品D. 普通包裹7. 双页或折叠式的以及不符合尺寸、纸质规格要求的各种明信片，应由用户套封后按（）交寄。

A. 明信片B. 印刷品C. 包裹D. 信函8. 关于国内信函、印刷品计费特点，以下叙述正确的是（）。

A. 按重量分段计费B. 按距离分段计费C. 按规格计费D. 按运输方式计费9. 寄达地为三区的国内特快专递邮件一件，重（）克，应收资费47元。

A. 800B. 1000C. 1500D. 200010. 国内盲人读物按（）交寄时，可免费寄递。

A. 挂号信函B. 平常邮件C. 特快专递邮件D. 保价邮件11. 以下选项中，不属于电子汇兑大集中系统组成部分的是（）。

A. 汇兑全国中心B. 汇兑渠道接入前置系统C. 电子稽查系统D. 账务管理系统12. 营业人员在收寄国内包裹时，可以收寄的情况（）。

《练习1》教学反思《练习1》教学反思1练习1的“处处留心”部分，主要是让学生记住各个省市的简称。

因为这部分知识较难，所以我是想尽办法，只为帮助孩子更好地记住这些简称。

一、充分预习先让学生充分地做好预习，找找各省市都在中国地图的哪里，特别是看看“鸡头”“鸡脚”“鸡尾”“鸡的心脏”都分布了哪些省市？并让孩子自己对应写好简称的各个省市，读熟。

二、激发兴趣课始，我询问孩子在哪儿见过这些简称，孩子们都说在汽车牌照上。

于是，班上就出现了一个个小小介绍员，很多孩子都知道家乡江苏的简称是苏，有外地学生告诉大家她家是安徽的，所以她家的汽车牌照上是皖，有一位学生说他爸爸在山东工作，所以在山东上了牌照是鲁三、归类记忆在这些简称中，我让孩子们分类记，有些简称是取省市名称中的一个字，这是孩子们最容易记的。

有比较难记的，我教给孩子们一些巧办法，比如重庆的简称是渝，我告诉孩子们重庆的酸菜鱼很有名，可以通过谐音记住它；贵州的简称是黔，贵就是富贵，有钱啊；湖南的简称是湘，湖南有个比较有名的主持人就叫李湘四、利用板报上完了练习一中有关省、市、自治区的简称歌，我在黑板报上贴上世界地图、中国地图，写上简称歌。

这样，对于简称歌的教学在学生日常的学习生活中得以延续下去，不然，戛然而止的教学会让学生遗忘得更快。

《练习1》教学反思2《练习1》中“口语交际”一题，通过搜集资料，准备导游词，当众作介绍，培养学生的综合表达能力，激发学生热爱祖国、热爱家乡的思想感情。

考虑到单纯地表达比较枯燥，所以在教学中，我努力创设多种情境，让学生进入角色，先说后写，在乐学乐写这样一种状态中学习，效果还可以。

一、创设情境。

上课开始，我让一个学生上台表演，当了一回小导游，将烟台的海介绍给大家听。

通过场景再现，学生们迅速进入情境，边表演边思考，请人帮忙明显利索多了。

情境像魔法棒，将学生的思维迅速聚拢，激发学生的学习兴趣，注意力更集中，思路更清晰，学得更快更好！二、先说后写。

五年级数学练习一亲：好好练习哦！爸爸相信你是最棒的孩子！！！（每天做一单元，没学的就先不要做哦！）班级姓名一、口算0．7＋0．9= 0．125×80= 8．24＋3．76=62．5×80= 4．1－3．8= 0．32÷16=14＋0．78= 6．4÷16= 14．6－0．34=5÷10= 1．3＋8．56= 0．7－0．55=2．4×5= 1－0．03= 8．1÷3=3．6÷12= 250×0．04= 30．5＋3．05=3．75×400= 0．78＋2．2= 1．5×8=6×1．5= 25×0．04= 9．6÷16=5－0．08= 3．25＋0．75= 10－0．1=0．17×4= 7．4÷2= 0．16÷8=二、列竖式计算1．64＋2．35= 8．34－6．22= 22．4÷7= 0．48×350=12．6＋3．4= 10－7．64= 9．52÷34= 8×1．36=13．88－6．29= 9．25×16= 8÷50= 0．99＋1．128．448÷14= 32×6．07=12．6＋7．43= 29÷22（保留2位小数）三、简便计算0.25×27×4 45×36＋64×45 1.25×320×25 0.96×25 9.9×999＋9.9 1.08×1258×25×1.25×16 489×101－489 33×1.0328×45＋30×13 5.6×9＋56 0.98×54小数计算练习二班级姓名一、直接写出结果。

COLLEGE ENGLISH TEST PAPER四级辅导练习一Part I Reading ComprehensionDirections：There are 4 passages in this part. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A), B), C) and D). You should decide on the best choice and mark the corresponding letter on the Answer Sheet with a single line through the center.Q u e s t i o n s1t o5a r e b a s e d o n t h e f o l l o w i n g p a s s a g e.Psychologist George Spilich and colleagues at Washington College in Chestertown, Maryland, decided to find out whether, as many smokers say, smoking help s them to “think and concen trate.” Spilich put young non-smokers, active smokers and smokers deprived (被剥夺) of cigarettes through a series of tests.In the first test, each subject (试验对象) sat before a computer screen and pressed a key as soon as he or she recognized a target letter among a grouping of 96. In this simple test, smokers, deprived smokers and nonsmokers performed equally well.The next test was more complex, requiring all to scan sequences of 20 identical letters and respond the instant one of the letters transformed into a different one. Non-smokers were faster，but under the stimulation of nicotine (尼古丁), active smokers were faster than deprived smokers.In the third test of short-term memory, non-smokers made the fewest errors, but deprived smokers committed fewer errors than active smokers.The fourth test required people to read a passage, then answer questions about it. Non-smokers remembered 19 percent more of the most important information than active smokers, and deprived smokers bested those who had smoked a cigarette just before testing. Active smokers tended not only to have poorer memories but al so had trouble separating important information from insignificant details.“As our tests became more complex.” Sums up Spilich, “non-smokers performed better than smokers by wider and wider margins” He predicts, “smokers might per form adequately at many jobs---until they got complicated. A smoking airline pilot could fly adequately if no problems arose, but if something went wrong, smoking might damage his mental capacity.”1. The purpose of George Spilich's experiments is ___A____.A) to test whether smoking has a positive effect on the mental capacity of smokersB) to show how smoking damages people's mental capacityC) to prove that smoking affects people's regular performanceD) to find out whether smoking helps people's short-term memory2. George Spilich's experiment was conducted in such a way as to ____C___.A) compel the subjects to separate major information from minor detailsB) put the subjects through increasingly complex testsC) check the effectiveness of nicotine on smokersD) register the prompt responses of the subjects3. The word “bested”(Line 3, Para. 5) most probably means __B_____.A) beat B) envied C) caught up with D) made the best of4. Which of the following statements is true ？CA) Active smokers in general performed better than deprived smokers.B) Active smokers responded more quickly than the other subjects.C) Non-smokers were not better than other subjects in performing simple tasks.D) Deprived smokers gave the slowest responses to the various tasks.5. We can infer from the last paragraph that ______B_.A) smokers should not expect to become airline pilotsB) smoking in emergency cases causes mental illnessC) no airline pilots smoke during flightsD) smokers may prove unequal to handing emergency casesQuestions 6 to 10 are based on the following passage.There is no denying that students should learn something about how computers work, just as we expect them at least to understand that the internal combustion engine(内燃机) has something to do with burning fuel, expanding gases and pistons (活塞) being driven. For people should have some basic idea of how the things that they use do what they do. Further, students might be helped by a course that considers the computer's impact on society. But that is not what is meant by computer literacy. For computer literacy is not a form of literacy(读写能力)；it is a trade skill that should not be taught as a liberal art.Learning how to use a computer and learning how to program one are two distinct activities, A case might be made that the competent citizens of tomorrow should free themselves from their fear of computers. But this is quite different from saying that all ought to know how to program one. Leave that to people who have c hosen programming as a career. While programming can be lots of fun, and while our society needs some people who are experts at it, the same is true of auto repair and violin-making.Learning how to use a computer is not that difficult, and it gets easier all the time as programs become more “user-friendly”. Let us assume that in the future everyone isgoing to have to know how to use a computer to be a competent citizen. What does the phrase “learning to use a c omputer”mean It sounds like “le arning to drive a car”, that is, it sounds as if there is some set of definite skills that, once acquired, enable one to use a computer.In fact, “learning to use a computer” is much more like “learning to play a game”, but learning the rules of one game may not help you play a second game, whose rules may not be the same. There is no such a thing as teaching someone how to use a computer. One can only teach people to use this or that program and generally that is easily accomplished.6. To be the competent citizens of tomorrow, people should D_______.A) try to lay a solid foundation in computer scienceB) be aware of how the things that they use do what they doC) learn to use a computer by acquiring a certain set of skillsD) understand that programming a computer is more essential than repairing a car7. In the second paragraph “violin-making” is mentioned to show that ___A____ .A) programming a computer is as interesting as making a violinB) our society needs experts in different fieldsC) violin making requires as much skill as computer programmingD) people who can use a computer don't necessarily have to know computer programming8. Learning to use a computer is getting easier all the time because __B_____ .A) programs are becoming less complicatedB) programs are designed to be convenient to usersC) programming is becoming easier and easierD) programs are becoming readily available to computer users9. According to the author, the phrase “learning to use a computer”(Lines3,4,Para.3) means learning ______C_.A) a set of rules B) the fundamentals of computer scienceC) specific programs D) general principles of programming10. The author's purpose in writing this passage is __B_____.A) to stress the impact of the computer on societyB) to explain the concept of computer literacyC) to illustrate the requirements for being competent citizens of tomorrowD) to emphasize that computer programming is an interesting and challenging job Q u e s t i o n s11t o15a r e b a s e d o n t h e f o l l o w i n g p a s s a g e.The way people hold to the belief that a fun-filled, painfree life equals happiness actually reduces their chances of ever attaining real happiness, If fun and pleasure are equal to happiness then pain must be equal to unhappiness. But in fact, the opposite is true more often than not things that lead to happiness involve some pain.As a result, many people avoid the very attempts that are the source of true happiness. They fear the pain inevitably brought by such things as marriage, raising children, professional achievement, religious commitment (承担的义务), self improvement.Ask a bachelor(单身汉) why he resists marriage even though he finds dating to be less and less satisfying. If he is honest he will tell you that he is afraid of making a commitment. For commitment is in fact quite painful. The single life i s filled with fun, adventure, excitement. Marriage has such moments, but they are not its most distinguishing features.Couples with infant children are lucky to get a whole night's sleep or a three day vacation. I don't know any parent who would choose the word fun to describe raising children. But couple who decide not to have children never know the joys of watching a child grow up or of playing with a grandchild.Understanding and accepting that true happiness has nothing to do with fun is one of the most liberating realizations. It liberates time now we can devote more hours to activities that can genuinely increase our happiness. It liberates money buying that new car or those fancy clothes that will do nothing to increase our happiness now seems pointless. And it liberates us from envy we now understand that all those who are always having so much fun actually may not be happy at all.11. According to the author, a bachelor resists marriage chiefly because __C_____ .A) he is reluctant to take on family responsibilitiesB) he believes that life will be more cheerful if he remains singleC) he finds more fun in dating than in marriageD) he fears it will put an end to all his fun adventure and excitement12. Raising children, in the author's opinion, is ___B____.A) a moral duty B) a thankless jobC) a rewarding task D) a source of inevitable pain13. From the last paragraph, we learn that envy sometimes stems from ____A___.A) hatred B) misunderstanding C) prejudice D) ignorance14. To understand what true happiness is one must ___B____.A) have as much run as possible during one's lifetimeB) make every effort to liberate oneself from painC) put up with pain under all circumstancesD) be able to distinguish happiness from fun15. What is the author trying to tell us CA) Happiness often goes hand in hand with pain.B) One must know how to attain happiness.C) It is important to make commitments.D) It is pain that leads to happiness.Q u e s t i o n s16t o20a r e b a s e d o n t h e f o l l o w i n g p a s s a g e.It's very interesting to note where the debate about diversity(多样化) is taking place. It is taking place primarily in political circles. Here at the College Fund, we have a lot of contact with top corporate(公司的) leaders；none of them is talking about getting rid of those instruments that produce diversity. In fact, they say that if their companies are to compete in the global village and in the global market place, diversity is an imperative. They also say that the need for talented, skilled Americans means we have to expand the pool of potential employees. And in looking at where birth rates are growing and at where the population is shifting, corporate America understands that expanding the pool means promoting policies that help provide skills to more minorities, more women and more immigrants. Corporate leaders know that if that doesn't occur in our society, they will not have the engineers, the scientists, the lawyers, or the business managers they will need.Likewise, I don't hear people in the academy saying. “Let's go backward. Let's go back to the good old days, when we had a meritocracy (不拘一格选人才)” (which was never true---we never had a meritocracy, although we've come closer to it in the last 30 years). I recently visited a great little college in New York w here the campus has doubled its minority population in the last six years. I talked with an African American who has been a professor there for a long time, and she remembers that when she first joined the community, there were fewer than a handful of minorities on campus. Now, all of us feel the university is better because of the diversity. So where we hear this debate is primarily in political circles and in the media---not in corporate board rooms or on college campuses.16. The word “imperative”( Line 5, Para. 1) most probably refers to something ___D____.A) superficial B) remarkable C) debatable D) essential17. Which of the following groups of people still differ in their views on diversity BA) Minorities. B) Politicians. C) Professors. D) Managers.18. High corporate leaders seem to be in favor of promoting diversity so as to __C_____.A) lower the rate of unemploymentB) win equal political rights for minoritiesC) be competitive in the world marketD) satisfy the demands of a growing population19. It can be inferred from the passage that _B______.A) meritocracy can never be realized without diversityB) American political circles will not accept diversityC) it is unlikely that diversity will occur in the U. S. mediaD) minorities can only enter the fields where no debate is heard about diversity.20. According to the passage diversity can be achieved in American society by ____A___.A) expanding the pool of potential employees.B) promoting policies that provide skills to employeesC) training more engineers, scientists lawyers and business managersD) providing education for all regardless of race or sexPart II Vocabulary and structureDirections: There are 20 incomplete sentences in this part. For each sentence there are four choices marked A), B), C) and D). Choose the ONE answer that best completes the sentence. Then mark the corresponding letter on the Answer Sheet witha single line through the center.1. The shy girl felt _C______ and uncomfortable when she could not answer her teacher's questions.A) amazed B) awkward C) curious D) amused2. Frequently single-parent children __C_____ some of the functions that the absent adult in the house would have served.A) take off B) take after C) take in D) take on3. He gives people the impression ____D___ all his life broad.A) of having spent B) to have spent C) of being spent D) to spend .4. A peculiarly pointed chin is his most memorable facial __A____.A) mark B) feature C) trace D) appearance5. John Dewey believed that education should be Ba preparation for life, that a person learns by doing, and that teaching must ____B___ the curiosity and creativity of children.A) seek B) stimulate C) shape D) secure6. Criticism and self-criticism is necessary ___C____ it helps us to find and correct our mistakes.A) by that B) at that C)on that D) in that7. However, at times this balance in nature is ___B____, resulting in a number of possibly unforeseen effects.A) troubled B) disturbed C) confused D) puzzled8. The patient's health failed to such an extent that he was put into D_______ care.A) tense B) rigid C) intensive D) tight9. Does everyone on earth have an equal right _____B__ an equal share of its resources.A) by B) at C) to D) over10.Americans eat ___C____ as they actually need every day.A) twice as much protein B) twice protein as much twiceC) twice protein as much D) protein as twice much11.In 1914, an apparently insignificant event in a remote part of Eastern Europe ______A_ Europe into a great war.A) inserted B) imposed C) pitched D) plunged12. We had to __C_____ a lot of noise when the children were at home.A) go in for B) hold on to C) put up with D) keep pace with13.What he said just now had little to do with the questionC _______ discussion.A) on B) in C) under D) at14.Over a third of the population was estimated to have no ______C_ to the health service.A) assessment B) assignment C) exception D) access15.Excuse me. If your call's not too urgent, do you mind __B_____ mine firstA) I make B) if I make C) me to make D) that I make16.Professor Taylor's talk has indicated that science has a very strong ____D___ on the everyday life of non-scientists as well as scientists.A) motivation B) perspective C) impression D) impact17. After a few rounds of talks, both sides regarded the territory disputeA _______ .A) being settled B) to be settled C) had settled D) as settled18.Floods cause billions of dollars worth of property damage ____A___.A) relatively B) actually C) annually D) comparatively19.We are all for your proposal that the discussion ____C___.A) be put off B) was put off C) should put off D) is to put off20.These goods are ____C___ for export, though a few of them may be sold on the home market.A) essentially B) completely C) necessarily D) remarkablyPart III ClozeDirections: There are 20 blanks in the following passage. For each blank there are four choices marked A), B), C), and D) on the right side of the paper. You should choose the ONE that best fits into the passage. Then mark the correspon ding letter on the Answer sheet with a single line through the center.The task of being accepted and enrolled (招收) in a university begins early for some students. Long __!__ they graduate from high school. These Students take special __2__ to prepare for advanced study. They may also take one of more examinations that test how__3__ prepared t hey are for the university.In the final year of high school, they __4__ applications and send them, with their student records, to the universities which they hope to __5__ .Some high school students may be __6__ to have an interview with representatives of the university. Neatly , __7__ , and usually very frightened, they are __8__to show that they have a good attitude and the __9__ to succeed.When the new students are finally __10__ ，there may be one more step they have to __11__ before registering for classes and __12__ to work. Many colleges and universities __13__ an orientation (情况介绍) program for new students. __14__these programs, the young people get to know the __15__ for registration and student advising, university rules, the __16__ of the library and all the other __17__ services of the college or university.Beginning a new life in a new place can be very __18__. The more knowledge students have __19__ the school, the easier it will be for them to __20__ to the new environment. However, it takes time to get used to college life.A1. A) as B) after C) since D) beforeC2. A) courses B) disciplines C) majors D) subjectsB3. A) deeply B) widely C) well D) muchC4. A) fulfill B) finish C) complete D) accomplishB5. A) attend B) participate C) study D) belongC6. A) acquired B) considered C) ordered D) requiredA7. A) decorated B) dressed C) coated D) wornD8. A) decided B) intended C) settled D) determinedA9. A) power B) ability C) possibility D) qualityC10. A) adopted B) accepted C) received D) permittedD11. A) make B) undergo C) take D) passC12. A) getting B) putting C) falling D) sittingD13. A) offer B) afford C) grant D) supplyB14. A) For B) Among C) In D) OnC15. A) processes B) procedures C) projects D) provisionsA16. A) application B) usage C) use D) utilityA17. A) major B) prominent C) key D) greatB18. A) amusing B) misleading C) alarming D) confusingA19. A) before B) about C) on D) atB20. A) fit B) suit C) yield D) adapt。

练习一（苏教版语文六下教案）【教学目标】1.掌握识字策略，训练孩子快速阅读课文，掌握课文大意。

2. 学会通过读、背歌谣，培养语感，开拓视野，丰富生活。

3. 喜欢诗歌，愉悦情感，在欣赏和鉴赏的过程中培养学生的审美能力。

4.引导学生学会读、明白诗歌的想象，加深对作者意图的理解。

5.进一步提高学生的口语表达能力，启发学生对词语、语言的感悟。

【教学重难点】1、确保学生能够准确朗读课文，快速掌握课文大意。

2、引导学生欣赏和鉴赏诗歌，学会读懂诗歌所表现的情感。

3、培养学生的口语表达能力，启发学生对词语、语言的感悟。

【教学过程】一、热身1、唱歌谣。

2、快速识字。

3、复习短音、长音。

二、导学1、让学生欣赏地球之歌。

2、引导学生体验地球的奇妙和他人带给我们的一切。

三、阅读理解1、朗读课文三遍，引导孩子记忆，理解并讲述简单的课文大意。

2、细读文章，引导孩子对故事中的事情进行分类。

3、童话故事中的事情分类：（1）森林中的事：草木，树叶，花朵，河流，鸟语等（2）动物的行为：家猫，小松鼠，小蜜蜂，小鸟等（3）季节的变化：春天，夏天，秋天，冬天（4）地球表面的现象：日落，日出，彩虹等（5）我们自己：走路，跑步，跳跃，坐着四、学生活动1、阅读诗歌并回答问题：（1）什么是四季？（2）为什么会有四季？（3）四季交替带来了哪些不同的景象？（4）作者对春天、夏天、秋天、冬天的感受各是什么？2、分组模仿朗读。

3、背诵诗歌。

四、巩固1、邀请学生分享自己的感受。

2、成果展示。

【课堂疑难问题】1、为什么会有四季？答：四季是由于地球围绕太阳公转且地球自转的阴暗面和阳光均衡分布。

太阳会距离地球远近而造成四季变化。

2、为什么春天万物复苏？答：春天一般是年末冬季气温升高、湿度增大、阳光照射加强是植物生长的条件得以完整的促进。

【板书设计】四季歌（乐谱写于黑板）课堂笔记四季是由地球围绕太阳公转且自转的阴暗面、阳光均衡分布所致。

春天：阳光明媚，万物复苏夏天：气温上升，炎热潮湿秋天：凉爽，丰收的季节冬天：寒冷、大雪封山。