周二练习
周二练习
一．单词拼写。
1.I understand how ________(心烦意乱的)you must be feeling.
2.There was an ________(表情)of anger on her face.
3.Every form of transport has its own ________(优势)and _______(不利).
4.The bridge was badly _______(破坏)by the flood.
5.All the people are born ________(平等的)so they should share the same rights. 二．句型转换
1.I stayed awake in order that I could have a good look at the moon.
→I stayed awake ____ _____ _____have a good look at the moon.
2. He is less like his father, but more like his mother.
→He is _______like his mother_____his father.
3. I advised her to go to bed early and she agreed.
→I_______her _____ _____ _____bed early.
4 .The world seemed to be at an end.
___ ___ ___ the world was at an end.
5 . “ Would you plea se not open the window? She said.
She _________ me ________ ________ _________ the window
三．完形填空：
Dear Fred,
The news in your letter of the 25th __31__ a real surprise. I am very pleased indeed to hear __32__ your marriage, and I offer you my warmest congratulations. I wish you and your wife many years of happiness together and look forward __33__ you both. It must be nearly three years since we __34__. Your marriage proves that you are doing very __35__ in business. One can’t marry in these days of high prices and heavy taxes without a good income. I am still unmarried, __36__ I hope to marry next year. Do you remember Mary Smith, the girl __37__ was at college with us? She’s the girl who’s going to be my __38__, as soon as we __39__ afford to marry. I am still in the food business. I have not yet risen to be the manager of the company. In fact I have still a junior position, but I’m beginning to do quite well. __40__, congratulations on your marriage.
31. A. were B. are C. was D. is
32. A. of B. from C. that D. out
33. A. to see B. for seeing C. for see D. to seeing
34. A. met B. meet C. meeting D. to meet
35. A. good B. well C. bad D. better
36. A. so B. however C. but D. and
37. A. who B. whom C. which D. /
38. A. husband B. wives C. wife D. daughter
39. A. must B. should C. shouldn’t D. can
40.A.Therefore B. Once more C. In the end D. Otherwise
周二练习答案
单词拼写。
1upset.2expression 2.advantages 3disadvantages 4.damaged 5.equal
句型转换。
1.in order to
2.more;than
3.persuaded ;to go to
4. It seemed that
5. asked , not to
open
完型填空。
31—35CADAB 36—40CACDB
(通用版)2020版高考物理复习“22”定时训练-2016年(全国2卷)逐题仿真练(含解析)
2016年(全国2卷)逐题仿真练 24．(12分)(2019·福建泉州市期末质量检查)如图1甲所示，将两根足够长、间距为L 的平行光滑金属导轨固定在同一水平面内，左端接一阻值为R 的电阻，与导轨垂直的虚线ef 右边区域存在方向竖直向下的匀强磁场，质量为m 的金属杆PQ 静止在导轨上．现对杆施加一水平向右的恒定拉力，经过时间t ，杆进入磁场并开始做匀速直线运动，杆始终与导轨垂直并接触良好，导轨和杆的电阻均不计． 图1 (1)求匀强磁场的磁感应强度大小B ； (2)若杆进入磁场后的某时刻撤去拉力，杆运动的速度与此后的位移关系图象如图乙所示，求0～x 0与x 0～3x 0两个过程中电阻R 产生的热量之比． 答案 (1) mR L 2t (2)5 4 解析 (1)设拉力大小为F ，杆的加速度为a ，进入磁场时的速度为v 0，则F ＝ma 杆做匀加速运动，则v 0＝at 杆在磁场中做匀速运动，则F ＝F 安＝BIL I ＝E R E ＝BLv 0 联立解得：B ＝ mR L 2t (2)撤去拉力后，由题图乙可知，杆在x ＝x 0处的速度大小为v ＝2v 0 3
由能量关系，在0～x 0过程中，电阻R 产生的热量Q 1＝12mv 02－12mv 2 在x 0～3x 0过程中，电阻R 产生的热量Q 2＝12 mv 2 解得Q 1Q 2＝54 . 25．(20分)(2019·陕西渭南市教学质检(二))如图2，粗糙斜面与光滑水平面通过光滑小圆弧平滑连接，斜面倾角θ＝37°.小滑块(可看作质点)A 的质量为m A ＝1kg ，小滑块B 的质量为m B ＝0.5kg ，其左端连接一水平轻质弹簧．若滑块A 在斜面上受到大小为2N ，方向垂直斜面向下的恒力F 作用时，恰能沿斜面匀速下滑．现撤去F ，让滑块A 从距斜面底端L ＝2.4m 处，由静止开始下滑．取g ＝10m/s 2 ，sin37°＝0.6，cos37°＝0.8.求： 图2 (1)滑块A 与斜面间的动摩擦因数； (2)撤去F 后，滑块A 到达斜面底端时的速度大小； (3)滑块A 与弹簧接触后的运动过程中弹簧最大弹性势能． 答案 (1)0.6 (2)2.4m/s (3)0.96J 解析 (1)滑块A 沿着斜面匀速下滑时受力如图所示 由平衡条件知m A g sin θ＝F f ，F N ＝m A g cos θ＋F ，F f ＝μF N 解得μ＝ m A g sin θ F ＋m A g cos θ ＝0.6. (2)滑块A 沿斜面加速下滑时受力如图所示， 设滑块A 滑到斜面底端时速度为v 0，根据动能定理得 (m A g sin θ－μm A g cos θ)L ＝12 m A v 02
(英语)高三英语阅读理解专项训练及答案
（英语）高三英语阅读理解专项训练及答案 一、高中英语阅读理解 1．阅读理解 The setting was a packed gymnasium just before the start of a game against another school. There were five girls who were members of the Danville High School basketball team—all of them starters. They were not in uniform to play that night and would not be on the team for the rest of this season. They were there to admit their breaking of team rules. They were there to support their coach's decision to take them off the team. They were there to let the town know there was a problem in their little community that needed to be addressed. And they did it with sincere regret rather than defensiveness. While the school had been out for the New Year's holiday, the five girls had gone to the party with several of their friends. There was alcohol there. And they all drank some. Coach Rainville has a zero tolerance rule on drugs and alcohol for her members though it was a hard decision to make. When classes resumed and accounts of holiday parties were shared, rumors about the five girls began closing in on them. The coach said she couldn't back down on her rules. And the players—two junior students and three senior students—agreed. That night in the gym was part of their public support of the coach's decision. “We hope you will understand that we are not bad kids. What we did was definitely not worth it. We hope this event will make everyone realize that there is a big drug and alcohol problem in our community,” one of the senior students said, “And if you work with us to try to solve this problem, you will help us feel that we have not been thrown off our basketball team for nothing.” The five left the floor to deafening applause. The team may not win another game this year. But they've learnt something about personal responsibility, the effect of one's action on others, and honesty that will serve them well throughout life. （1）It can be inferred from the passage that the five girls who were kicked off the team were ________. A. very good players on the team B. addicted to alcohol and drugs C. three junior students and two senior students D. scolded by their parents for drinking alcohol （2）What did the girls do to support their coach's decision? A. They didn't fight for Danville High School any more. B. They all gave speeches to apologize in the local press. C. They admitted their mistake in public in the gymnasium. D. They would never drink any alcohol throughout their life. （3）Which word best describes the coach Rainville? A. Indifferent. B. Strict. C. Stubborn. D. Cruel. （4）Which would be the best title for the passage? A. Growing up with pain B. A bad mistake C. Team rules are everything D. Basketball girls in high school 【答案】（1）A
通用版2020版高考物理二轮复习“2+2”定时训练142015年全国2卷逐题仿真练含
2015年(全国2卷)逐题仿真练题号 24253334考点带电粒子在匀强电 场中的运动动力学方法分析板块模型扩散现象和气体性质光的性质和机械波 24．(12分)(2019·陕西渭南市教学质检(二 ))如图1所示，一电荷量为q 、质量为m 的带电粒子以初速度v 0由P 点射入匀强电场，入射方向与电场线垂直．粒子从Q 点射出电场时，其速度方向与电场线成30°角．已知匀强电场的宽度为d ，不计重力作用．则匀强电场的场强E 大小是多少？图1 答案 3mv 02 qd 解析 带电粒子在电场中做类平抛运动，根据运动的合成与分解得到： v y ＝＝v 0， v 0 tan30°3水平方向上：d ＝v 0t ，竖直方向上：v y ＝t ， Eq m 联立方程得：E ＝. 3mv 02 qd 25．(20分)(2019·重庆市第三次调研抽测)如图2所示，半径R ＝0.8m 的四分之一光滑圆弧轨道竖直固定于水平面上，4个相同的木板紧挨着圆弧轨道末端静置，圆弧轨道末端与木板等高，每块木板的质量为m ＝1kg ，长l ＝1.5m ，它们与地面间的动摩擦因数μ1＝0.1，木板与地面的最大静摩擦力等于滑动摩擦力．在第一块木板左端放置一个质量为M ＝2.5kg 的小铅块B (可视为质点)，现让一个与B 完全一样的铅块A 从圆弧顶端由静止滑下，经圆弧底端后与B 发生弹性正碰，铅块与木板间的动摩擦因数μ2＝0.2，g ＝10m/s 2.求： 图2
(1)铅块A 刚滑到圆弧轨道底端时对轨道的压力大小； (2)通过计算说明铅块B 滑上第几块木板时，木板才开始运动，并求出此时B 的速率．答案 (1)75N (2)3 2m/s 解析 (1)设A 刚滑到圆弧轨道底端时的速度为v 0，轨道对A 支持力大小为F N 由机械能守恒定律得：MgR ＝Mv 02 12由牛顿第二定律，有：F N －Mg ＝M v 02R 联立解得F N ＝75N ，v 0＝4m/s 由牛顿第三定律知：F N ′＝F N ＝75N (2)小铅块B 在木板上滑动时铅块对木板的摩擦力为：F f1＝μ2Mg ＝5N 当铅块B 滑动到第n (1≤n ≤4)块木板时，铅块所在木板及后面的木板受到地面的最大静摩擦力为：F f2＝μ1[M ＋(5－n )m ]g 要使木板滑动，应满足F f2
高三培优补差定时7+4训练 分推7
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完整初二英语阅读理解专项训练
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论阅读教学思维训练的层次性 摘要阅读教学是发展思维的教学。学习认知具有不同层次，思维亦有不同层次。阅读教学根据阅读能力的层次训练学生不同层次的思维能力，是每位教师必须注重的。培养学生不同层次的思维能力，使不同层次的思维形成一个思维整体，是阅读教学最终目的。 关键词阅读；阅读教学；思维层次 什么是阅读教学？“就是指语文教师指导学生通过视觉认识书写的文字符号，从中获得阅读技能和思想的程序。其实质就是对书面信息进行理解的复杂过程。”[1]阅读是思维的过程，阅读教学就是训练、发展思维的过程。目前，中学语文科的阅读教学还没有特别强调“发展思维能力”。1993年公布试用的九年义务教育全日制初级中学《语文教学大纲》中“阅读能力”部分规定是：“读一般的现代文，能领会词句在语言环境中的含义和作用，理解思想内容和文章的思路，了解基本的写作方法，具有一定的语言感受能力……初步具有欣赏文学作品的能力……”，整段文字强调了认知，理解，培养习惯，但没有明确“发展思维力”。而日本国语阅读教学指导原则是“以思考为主”。强调阅读的整体就是锻炼思考。而且在阅读教学单元目标中写得十分明白：“从社会的纠葛中，抓住人们对生活的种种态度——有怀着痛苦而生活的人，也有看到希望而生活的人，深入思考以发展思考力。”[2]（《故乡》小说，《浪》诗歌，《二人之友》小说，组成一单元）日本阅读教学重点放到“思维”上是值得我国参考借鉴的。尽管在中学语文教学大纲的阅读能力训练中没有标明“发展思维力”，但阅读教学本身就需要思维能力训练，认知、理解、运用本身就是思维的过程。许多语文教师也在实践中把阅读教学重心移到了思维训练上。特级教师于漪说：“教师应从学生思想感情、知识能力的实际出发，运用文章精要之处，开启学生思维的窍门……”[3]。著名特级语文教师宁鸿彬说：“为了培养创造型的‘四有’人才，我从智能因素和非智能因素两个方面去培养学生的创造能力，……培养他们有利于进行创造的良好个性心理品质，又以发展创造思维为核心。” [4]语文教育改革家魏书生认为：“一节课好坏的主要标准，只能看学生是否在进行积极思维，教师的讲解与学生的思维之间是否有一根看不见的线紧紧维系着。”[5] 可以说，语文阅读教学思维训练已渐渐成为语文界的共识，也成为阅读教学乃至整个语文教学的发展趋势。问题是许多语文教师在阅读教学中还把握不住思维训练的尺度，思维训练的教学缺乏清晰性和层次性。美国心理学家加涅在学习分类理论中蕴含着一个重要观点，即学习具有层次性。美国教育家布卢姆把教学目标分成六个层次，即：知识、领会、运用、分析、综合、评价。这是一个由低级到高级的学习过程，这一理论为我们语文阅读教学提供了一个很好的思考框架。我们在进行阅读教学时首先要考虑学生阅读水平的不同层次在此基础上考虑阅读思维训练的不同层次。朱绍禹教授把阅读教学分为复述性阅读、解释性阅读、评价性阅读、创造性阅读。其阅读水平层次性划分标准主要是以阅读过程中思维发展的程度为依据的，对中学阅读教学指导意义很大。如以鲁迅作品《故乡》为例，常见的阅读教学遵循如下步骤：第一步，扫清字词障碍，通读课文。第二步，理清故事线索，分析人物形象。第三步，概括小说主题。第四步，评价小说意义，概括写作特色。显然，阅读教学的四大目标是由浅入深的，其思维水平明显呈现出由低往高的层次性。教师必须预先明确这一点，在教学中才能有的放矢，拾级而上。正如朱绍禹教授所说：“为使学生的读文能力达到更高水平，语文教师需要了解阅读水平可以分几级，在什么情况下达到哪一级才算实现阅读教学目标。这是个衡量阅读能力的标准问题，对学生阅读能力的训练和以后的发展关系极大。”[6]朱先生“阅读水
2017高三阅读定时训练2
2017高三阅读定时训练2（16川） 一．阅读理解 C In the depths of the French Guianese rainforest, there still remain unusual groups of indigenous(土著的) people. Surprisingly, these people live largely by their own laws and their own social customs. And yet, people in this area are in fact French citizens because it has been a colony(殖民地) of the French Republic since 1946. In theory, they should live by the French law. However, their remote locations mean that the French law is often ignored or unknown, thus making them into an interesting area of “lawlessness” in the world. The lives of these people have finally been recorded thanks to the efforts of a Frenchman from Paris called Gin. Gin spent five months in early 2015 exploring the most remote corners of this area, which sits on the edge of the Amazon rainforest, with half its population of only 250,000 living in its capital, Cayenne. “I have a special love for the French Guianese people. I have worked there on and off for almost ten years,” says Gin. “I’ve been able to kee p firm friendships with them. Thus I have been allowed to gain access to their living environment. I don’t see it as a lawless land. But rather I see it as an area of freedom.” “I wanted to show the audience a photographic record touching upon the uncivilized life,” continues Gin. “I prefer to work in black and white, which allows me to show different specific worlds more clearly.” His black-and-white pictures present a world almost lost in time. These pictures show people seemingly pushed into a world that they were unprepared for. These local citizens now have to balance their traditional self-supporting hunting lifestyle with the lifestyle offered by the modern French Republic,which brings wit h it not only necessary state welfare,but also alcoholism, betrayal and even suicide. 28. Why does the author feel surprised about the indigenous people in French Guiana?22 A. They seldom follow the French law. B. They often ignore the Guianese law. C. They are separated from the modern world. D. They are both Guianese and French citizens. 29. Gin introduced the special world of the indigenous Guianese as _________. A. a tour guide B. a geographer C. a film director D. a photographer 30. What is Gin’s attitude towards the lives of the indigeno us Guianese? A. Cautious. B. Doubtful. C. Uninterested. D. Appreciative. 31. What does the underlined word“it” in the last paragraph refer to? A. The modern French lifestyle. B. The self-supporting hunting. C. The uncivilized hunting. D. The French Republic. D A warm drink of milk before bed has long been the best choice for those wanting a good night’s sleep. But now a study has found it really does help people nod off—if it is milked from a cow at night.
高考英语阅读理解专项训练及答案及解析
高考英语阅读理解专项训练及答案及解析 一、高中英语阅读理解 1．阅读理解 Traditional Chinese medicine (TCM) is gaining global popularity. According to a government white paper, TCM has been introduced in 183 countries and regions around the world. Westerners' understanding of TCM, however, may be limited to acupuncture, cupping and massage(针灸，拔罐和按摩). For instance, the purple, injury-like marks left on U. S. swimmer Michael Phelps，back from cupping for the purpose of relaxing his muscles and reducing pain became the center of attention during the Rio Olympics in 2016. As a matter of fact, Chinese herbs play a more important role in getting rid of diseases and keeping the body in good condition in the TCM treatment system than physical treatment. It is therefore disheartening to know that while 103 World Health Organization member countries have given approval to the practice of acupuncture, not many recognize Chinese herbal medicine. TCM falls far behind Western medicine owing partly to the slow development of Chinese herbs. Herbs are made into pills, powder and soup, and the kind of herbs used, their quality and quantity, and the processing of the ingredients (原材料) jointly determine the effectiveness of the prescription. Compared with Western medicine, which has standardized drug production processes and treatment methods, TCM lacks standardization, with the chemical composition and functions of its medicines being unclear and their effects being unstable. Fortunately, standardization has improved in recent decades, with an increasing number of factories producing patented TCM drugs. Another factor that has prevented the development of TCM prescription drugs is the lack of creativity. While Western medicine-making companies come up with new products every year, TCM drug producers tend to make medicines according to prescriptions handed down from the past. Chinese chemist Tu Youyou's winning the 2015 Nobel Prize in Physiology or Medicine for her research into malaria (疟疾) treatment may drive creativity to some extent in China's TCM industry. However, the current state of affairs cannot be changed within a short time. （1）Why does the author mention the example of Michael Phelps? A. Because he was injured in his swimming. B. Because cupping is a kind of important TCM treatment. C. Because westerners know a little about TCM. D. Because westerners attach great importance to TCM. （2）Why don't some member countries of WHO recognize Chinese herbal medicine? A. Because Chinese herbs can get rid of diseases. B. Because they only approve the practice of acupuncture. C. Because Western medicine is more effective. D. Because medicine made out of Chinese herbs develops slowly. （3）Compared with Western medicine, what is the weak point of TCM in Paragraph 4? A. The methods of planting herbs. B. The effectiveness of prescription. C. Lacking in standardization. D. Its stable functions.
思维训练课程指南
目录 一、《潜能思维训练》实施意见 (1) 二、《潜能思维训练》教案 (1) 《潜能思维训练》实施意见 第一章中国教育学会中育教育发展研究中心简介 一、中国教育学会 中国教育学会是中国最大的教育学术团体，有分支机构51个，单位会员48个，个人会员85万人。中国教育学会汇集了大量的教育科研成果；掌握着教育理论研究和实践探索的丰富经验；拥有活跃在各个教育学科和教育领域的科研、教学、管理人才。中国教育学会一直是党和政府联系广大教育工作者的桥梁和纽带，是发展教育科学的积极力量，为推动教育改革发展发挥着重要作用，是教育行政部门的得力参谋和助手。 二、中国教育学会中育教育发展研究中心 中国教育学会中育教育发展研究中心是中国教育学会举办的专业化的教育服务机构。中国教育学会中育教育发展研究中心秉承中国教育学会的宗旨和任务，发展基础教育实验学校和特色教学实验基地、组织教育培训活动、提供教育业务咨询、承办《中国教育学刊》、组织教育评价和教育学术交流活动。依托中国教育学会的人才、管理、品牌和科研等教育资源优势，中育教育发展研究中心形成了涵盖教育服务、管理、传媒、培训、国际教育、校外教育、学校设计等业务领域的综合型教育服务机构。 第二章《潜能思维训练》的推出背景 一、“潜能思维训练”的重要性 幼儿处在逻辑思维萌发及初步发展的时期，也是数学概念初步形成的时期。幼儿参加“潜能思维训练”的重要性在于： 1．使儿童进入“数学的思维”，体验数学在生活中的应用。 2．能提高儿童的抽象思维能力，促进其逻辑思维的发展。
3．能充分开发儿童大脑的功能，提升形象思维能力，强化空间智能，提高语言表达力。 4．能培养儿童良好的学习习惯和学习品质，以更好地适应小学阶段的学习。 二、学校数学教育的现状 在很多人心目中，数学课就是计算，几乎每个人的成长历程都经过数数、加减之类的所谓“数学启蒙”。怎样才算是真正“掌握了”数学知识呢？儿童学习数学，要从他们生活中熟悉的具体事物入手逐步开始。仅仅停留于具体问题的解决不能称为数学教育；而不从具体的事物出发或者脱离具体实践来教授抽象的数学运算，更是违背了数学的本质属性。幼儿园或者学校里，似懂非懂中学习数学运算的儿童不在少数，这些幼儿即使被教会了计算，也没有真正地学到数学，也没真正得到思维能力的训练。 三、《潜能思维训练》的理论依据 1．国家的要求。2001年7月教育部颁发了《幼儿园教育指导纲要》，《纲要》明确规定了科学领域（包含数学教育）的目标、内容和要求以及指导要点。这使我们明确了在幼儿数学教育中应建立情感、社会性、智力等全面协调发展的教育目标体系。 2．开发思维理论。思维是人脑对客观事物的本质和规律的间接的概括的反映；是人智慧的中枢，被恩格斯誉为“世间最美丽的花朵”。儿童的大脑是待燃的火把，《潜能思维训练》是一套新颖的儿童思维训练教材，是适合儿童的火种；通过生动有趣的内容，培养孩子的想象力、注意力、观察力和空间感知等，使孩子的认知能力、动手能力、思考和分析能力得到全面提高。 3．数学对幼儿智力发展的特殊价值。数学学科的结构和知识体系非常系统、严谨，其逻辑性十分突出，这对幼儿智力的发展有着特殊的价值。幼儿正处于逻辑思维萌发和初步发展时期，数学的学习对其初步逻辑思维能力的发展、良好思维品质的形成有着主要的作用。 四、《潜能思维训练》推广价值 21世纪已经到来，社会的发展不仅对人才数量的需求越来越大，而且对人才的质量要求也越来越高。数学已经渗透于科学技术、经济生活和现实世界中，对人类生活生存的品质有着重要的影响。良好的数学修养将为人的一生可持续发展奠定坚实的基础。 兴趣、好奇心、求知欲是幼儿学习数学的内部动力，而《潜能思维训练》的重要任务就是开发每个学生的大脑潜能，让孩子的个性健康发展，培养学生学习的兴趣和乐趣，促进其思维的发展。 第三章《潜能思维训练》的课程组成 一、《潜能思维训练》的课程体系 《潜能思维训练》分上下两册。遵循幼儿年龄特点和认知发展规律，设计了由易到难、由浅入深、贴近幼儿生活的活动内容，其中包括数的认识、量的比较、认识形体、时空概念等内容。有“数一数”、
高考物理二轮复习“2+2”定时训练7 2017年(全国1卷)逐题仿真练(含解析)
2017年(全国1卷)逐题仿真练 题号 24 25 33 34 考点 功能关系的应用 带电体在电场内的运动 分子动理论和气体性质 机械波和光 24．(12分)(2019·广东深圳市第二次调研)如图1(a)为玩具弹弓，轻质橡皮筋连接在把手上 A 、 B 两点，一手握住把手不动，使AB 连线水平， C 为自由伸长时橡皮筋中点轻弹夹的位置， 如图(b)．AO ＝OB ＝6cm ，另一手捏着装有质量为10g 弹珠的弹夹，从C 点由静止竖直向下缓慢移动到D 点，放手后弹珠竖直向上射出，刚好上升到离D 点20.15米高的楼顶处．测得∠ACB ＝44°，∠ADB ＝23°，取tan22°＝0.4，tan11.5°＝0.2，g ＝10m/s 2 ，不计空气阻力．求： 图1 (1)从C 到D 的过程中，弹珠重力所做的功及手所做的功； (2)若还将橡皮筋拉到相同长度，仅改变发射方向，弹珠向斜上方运动到高出释放点8m 处的速率． 第二次从释放到h ′＝8m 处，机械能守答案 (1)1.5×10－2 J 2J (2)15.6m/s 解析 (1)从C 到D ，弹珠重力做功：W G ＝mgh CD 由题图可得：h ＝h CD ＝OB tan11.5°－OB tan22°＝0.060.2m －0.060.4 m ＝0.15m 联立解得W G ＝1.5×10－2 J 从C 到D ，再到最高点的过程中， 由功能关系：W 手＝mgH －mgh ，其中H ＝20.15m 解得W 手＝2J (2)设弹珠在D 点的弹性势能为E p ，从D 到最高点，由功能关系：E p ＝mgH 恒， 则：E p ＝mgh ′＋12 mv 2
(英语)中考英语阅读理解专项训练及答案
（英语）中考英语阅读理解专项训练及答案 一、英语阅读（日常生活类） 1．阅读下列短文，从每题所给的A、B、C三个选项中选出最佳答案。 If you look at the top of your phone, you'll usually see a little symbol that says 3G or 4G. The "G" stands for the "generation" （代）of your mobile network. But the symbols will become things of the past after 5G networks fully arrive. On March 30, Shanghai vice-mayor Wu Qing made the first 5G video call on a Huawei Mate X Smartphone. Shanghai has also become the first city in China to start testing 5G networks. About 100 times faster than 4G networks, 5G will let people download and upload data（数据） faster than ever before. But 5G won't just bring faster mobile internet. People can use it for many other things as well. For example, 5G will help to make self-driving cars safer. Today's self-driving test cars have one problem-lag（延迟）. When the car "sees" an obstacle（障碍物）, it sends this information to a data center and receives instructions, However, it will be some time before it sends and receives this information. With this kind of lag, the cars might crash because they don't receive instructions in time. With 5G, this lag will be greatly lowered, making the cars safer. 5G could also be used to power the internet of things （IoT）, that is, a large online network that connects all things and people. Fast internet speeds will be the key to developing this technology. The IoT could be used in a lot of ways. For example, with IoT, your refrigerator could automatically （自动地） place an order online for eggs when it finds that there are no eggs left inside. （1）Which city was 5G tested for the first time? A. Beijing. B. Shanghai. C. Shenzhen. （2）What can we infer（推测） according to the passage?. A. 5G is widely used in China now. B. 5G networks will make our lives more convenient. C. There are no symbols at the top of our phones. （3）The writer uses self-driving cars as an example to . A. explain how 5G's fast speed can be helpful B. warn about the possible dangers of self-driving cars C. explain how self-driving cars work （4）What is IoT according to the passage? A. A robot that can do housework. B. An online store where you can buy anything. C. A large online network that connects things and people. （5）Which sentence is right according to the passage? A. 5G will help us buy eggs quickly. B. Robots can help us buy eggs online. C. Our refrigerator can order eggs online for us. 【答案】（1）B