高中英语 Unit 4 Sharing 第1课时同步检测 新人教版选修7
高二英语选修7同步检测 Unit 4 Sharing 第1课时
Ⅰ.单词拼写
1．In this quiet way, the first________(两星期)of her visit soon passed away.
2．Much new knowledge is________(遥远的)from the immediate interest of the ordinary person.
3．There is an active demand for________(作口译的人)during the trade fair.
4．An officer climbed on to the________(平台)and spoke to him.
5．I can not understand so abstract c________.
6．What things do you do w________or monthly, but not every day?
7．He tried to a________his daily plan to leave time for everything.
8．What you said is not r________to the matter in hand.
9．Do you know how a(n)________(宇航员)flies in a spacecraft?
10．The rising sun is especially beautiful to look at from this________(角度)．11．They celebrate their wedding a________annually.
12．The government calls on the youth to d________their blood voluntarily.
13．The purposes of the United Nations are to maintain international peace and s________.
14．The quickest way to sew is with a s________machine.
15．He gave his son some money for the p________of his school books.
16．Getting the balance between two________(政治的)forces involves a lot of arts.
17．The children's ________(门诊部)was open during school hours.
18．Having lost his job, he'd begun to interest himself in local________(志愿的)work.
19．It is quite necessary to know the age________(分布)in the population.
20．All the machines are listed in the________(目录)．
答案：1.fortnight 2.remote 3.interpreter 4.platform
5．concept 6.weekly 7.adjust 8.relevant 9.astronaut
10．angle 11.anniversary 12.donate 13.security
14．sewing 15.purchase 16.political 17.clinic
18．voluntary 19.distribution 20.catalogue
Ⅱ.完形填空
阅读下面短文，理解大意，从题中(1～20)所给的A、B、C、D四个选项中选出一个最佳答案。
This story is about a 92-year-old proud lady. She is fully__1__each morning by eight, with her hair fashionable coifed(戴头巾)and makeup perfectly applied，__2__she is legally blind. She is moving to a nursing home today. Her husband of 70 years old recently__3__， making the move necessary.
After many hours of waiting__4__in the lobby of the nursing home, she smiled sweetly when__5__her room was ready. As she directed her walker to the elevator, I provided a visual__6__of her tiny room, including the eyelet(圆孔眼)sheets that had been hung on her window.“I__7__it，”she stated with the enthusiasm of an eight-year-old who had just been__8__with a new puppy(小狗)．
“Mrs Jones, you haven't seen the__9__yet. Just wait.”“That doesn't have anything to do with it，”she replied.“__10__is something you decide on ahead of time. Whether I like my room or not doesn't__11__how the furniture is arranged. It's__12__I arrange my mind. I already__13__to love it. It's a decision I make every morning when I wake up.”
“I have a__14__. I can spend the day in bed listing the difficulty I have with the parts of my body that no longer work, or get out of bed and be__15__for the ones that do. Each day is a__16__， and as long as my eyes open I'll focus on the new day and all the happy__17__I've stored away...just for this time in my life.”
“Old age is__18__a bank account...you withdraw from what you've put in. So, my advice to you would be to__19__a lot of happiness in the bank account of memories. Thank you for your part in__20__my memory bank. I am still storing.”
文章大意：这是一篇夹叙夹议文，介绍一位92岁高龄的老人积极的人生态度：人生就像储蓄账户一样，我们应在年轻时多储存美好的记忆，以便在年迈时有丰富的记忆可提取。like表示“像……一样；如同”。
1．A.prepared B．devoted
C．occupied D．dressed
答案：D 根据下文“with her hair fashionable coifed(戴头巾)and makeup perfectly applied”推断她每天穿戴整齐，衣着讲究。
2．A.as if B．even though
C．in case D．so that
答案：B 尽管(even though)已经失明，她还是坚持这样(穿戴打扮)。
3．A.took over B．passed away
C．passed by D．turned away
答案：B 她丈夫最近“去世”了，搬家就很有必要了。pass away“去世”，符合语境。take over“接收”，pass by“经过”，turn away“拒绝”。
4．A.anxiously B．eagerly
C．patiently D．excitedly
答案：C 92岁的老人等待数小时还甜甜地微笑，说明她很有“耐心”。
5．A.told B．warned
C．explained D．suggested
答案：A 这是“when she was told that...”的省略。当她被告知房间准备好时，她甜甜地笑了。
6．A.appreciation
B．selection
C．description
D．expression
答案：C 当她拄着拐杖走向电梯时，我对她的小房间进行了视觉上的描述。description 表示“介绍，描述”。
7．A.love B．believe
C．need D．take
答案：A 从下文来看，老人是在用积极的心态面对生活，这里意为：我热爱我的房间。
8．https://www.360docs.net/doc/bf8256058.html,pared B．deserted
C．statisfied D．presented
答案：D 她说话时就像一个八岁的孩子得到了一只小狗一样高兴，富有激情。
9．A.puppy B．window
C．room D．nurse
答案：C 老人还没有住进房间就说很喜欢，这让人很惊讶。
10．A.Life B．Luck
C．Happiness D．Success
答案：C 老人说那没有关系。幸福(happiness)是你提前决定好的事情。
11．A.look on B．depend on
C．focus on D．take on
答案：B 我是否喜欢房间与里边的家具摆设没有关系。depe nd on“依靠，取决于”。
12．A.how B．what
C．whether D．when
答案：A 我如何安排我的想法才是重要的。
13．A.agreed B．forgot
C．remembered D．decided
答案：D 由上文的“you decide on ahead of time”可知答案。
14．A.purpose B．decision
C．choice D．power
答案：C 老人认为自己每天起床都面临一个“选择”：是积极面对还是消极应付。
15．A.upset B．thankful
C．lucky D．helpful
答案：B 是数落自己身体上不方便的地方，还是为那些还很管用的部位心存感激呢？
16．A.process B．gift
C．step D．puzzle
答案：B 每天都是(上帝赐予的)礼物(gift)。
17．A.experiences
B．characters
C．scenes
D．memories
答案：D 根据最后一段可知，平时应多储存幸福的记忆，那是年迈时的财富。
18．A.beyond B．like
C．over D．among
答案：B 老人比喻说，人生就像储蓄账户一样，年轻时多储蓄美好的记忆，年迈时就有丰富的记忆可提取。like表示“像……一样；如同”。
19．A.store B．gain
C．win D．taste
答案：A 根据下文“I am still storing”可知答案。store表示“贮存；储备”。
20．A.opening B．finding
C．filling D．adding
答案：C 谢谢你充实(fill)我的记忆宝库。
Ⅲ.阅读理解
阅读下面的文章，从题中所给的A、B、C、D四个选项中选出最佳答案。
Long ago, poems were recited out loud instead of being written down. When the Greeks first started the Olympics, they held poetry contest as well as athletic competitions.
Now, poetry competitions have been revived(恢复). This year 120,000 high school students competed in the first Poetry Out Loud National Recitation Contest, performing poems from memory for $100, 000 in prizes.
The first competitions were held in classrooms. The winners went on to school-wide contests, and then t hey competed in city and state competitions. Finally, the 50 state champions, along with the District of Columbia champion came to Washington, D．C. last week for the last showdown. After the 51 champions competed against one another,12 went on to the finals. Then the field was narrowed to five. The final five had one last chance to“perform”a poem. The overall champ, Jackson Hille, a high school senior from Ohio, won a $ 20,000 scholarship.
The National Endowment for the Arts and the Poetry Foundation started Poetry Out Loud because they realized that hearing a poem performed is a different experience from reading it on a page.
It's not just a matter of saying the words in the right order. It's the tone of voice, the pauses, the gestures, and the attitude of the person performing that bring the words to life.“Each time we hear somebody recite a poem, we find something fresh and interesting about it，”says National Public Radio Broadcaster Scott Simon, master of ceremonies for the finals. Hearing it in a new voice offers something new
to the listener.
Not only do the people hearing poems have a new experience, memorizing and presenting poems helps the participants(选手)understand those poems in a new way. Another benefit of a competition such as Poetry Out Loud is that the participants learn public-speaking skills that can help them for life.
文章大意：诗歌仅仅在书上阅读是远远不够的，通过朗诵和聆听，同一首歌会给人带来新的感受。
1．From the first paragraph, we can know________.
A．the Greeks were the first to write poems
B．the Olympics used to start with poem reciting
C．poems were spread orally in the past
D．athletes were asked to recite poems before competing
答案：C 推理判断题。从第一段中的“Long ago, poems were recited out loud instead of being written down.”可知，在很早以前诗歌只是口头朗诵的，故可知当时诗歌的传播方式为口头传授，故选C。
2．How many rounds of competitions did the champions take before they went to Washington, D．C.?
A．Three. B．Four.
C．Five. D．Six.
答案：B 细节理解题。从第三段的介绍中可知，参赛者经过在班里、在学校、然后在市里和州里的比赛后，才到华盛顿进行决赛。故B项正确。
3．According to the passage, hearing a poem recited by different people can________.
A．bring a new life to listeners
B．help listeners find their interest
C．make listeners learn the words
D．offer something new to listeners
答案：D 细节理解题。从倒数第二段中的叙述中可知，朗诵诗歌可以给听者带来新的感受。故选D。
4．One benefit the participants get from poem recitation competitions is that they can________.
A．become skilled in speaking in public
B．write good poems themselves
C．change their attitudes towards life
D．make friends with many great poets
答案：A 细节理解题。从文章最后一句话“Another benefit of a competition such as Poetry Out Loud is that the p articipants learn public-speaking skills that can help them for life.”可知A项正确。
5．What's the main idea of the passage?
A．Reciting poems improves your memory.
B．Remembering a lot of poems is fun.
C．Poets have a great time.
D．Poetry competitions freshen us up.
答案：D 主旨大意题。本文主要介绍了Poetry Out Loud诗歌朗诵比赛，承办方“The National Endowment for the Arts and the Poetry Foundation”认为通过这种方式，人们可以从新的角度体验和学习诗歌，参与者也从中受益匪浅。D项“诗歌比赛给我们全新的感受”最能表达全文的中心。
人教版新课标高中英语选修7课文原文
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人教版高中英语选修七Unit2同步精选及答案
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高中物理选修3-3知识点整理
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做无规则运动。 （3）热运动：分子的无规则运动与温度有关，简称热运动，温度越高，运动越剧烈 3、分子间的相互作用力 分子之间的引力和斥力都随分子间距离增大而减小。但是分子间斥力随分子间距离加大而减小得更快些，如图1中两条虚线所示。分子间同时存在引力和斥力，两种力的合力又叫做分子力。在图1图象中实线曲线表示引力和斥力的合力(即分子力)随距离变化的情况。当两个分子间距在图象横坐标0r 距离时，分子间的引力与斥力平衡，分子间作用力为零，0r 的数量级为1010 -m ，相当于0r 位置叫做平衡位置。当分子距离的数量级大于 m 时，分子间的作用力变得十分微弱，可以忽略不 计了 4、温度 宏观上的温度表示物体的冷热程度，微观上的温度是物体大量分子热运动平均动能的标志。热力学温度与摄氏温度的关系：273.15T t K =+ 5、内能 ①分子势能 分子间存在着相互作用力，因此分子间具有由它们的相对位置决定的势能，这就是分子势能。分子势能的大小与分子间距离有关，分子势能的大小变化可通过宏观量体积来反映。（0r r =时分子势能最小） 当0r r >时，分子力为引力，当r 增大时，分子力做负功，分子势能增加 当0r r <时，分子力为斥力，当r 减少时，分子力做负功，分子是能增加 ②物体的内能 物体中所有分子热运动的动能和分子势能的总和，叫做物体的内能。一切物体都是由不停地做无规则热运动并且相互作用着的分子组成，因此任何物体都是有内能的。（理想气体的内能只取决于温度） ③改变内能的方式
人教版高中英语选修7重点词词性转换
选修七 Unit1 1.profit n．收益；利润；盈利→ profitable adj. 有益的；有利可图的 https://www.360docs.net/doc/bf8256058.html,panion n．同伴；伙伴→ company n. 公司；商号；陪伴；同伴 3.adapt vt.使适应；改编→adaptation n．[U，C]适应；改编；改编的作品 4.absence n．[C，U]缺席；[U]缺乏→absent adj.缺席的；缺乏的→(present adj.出席的；在场的 5.access n．[U](接近的)方法；通路；可接近性(熟词生义) vt.进入；使用→accessible adj.可接近的；可进入的；可使用的 6.annoy vt.使……不悦；惹恼→annoyed adj.颇为生气的→annoying adj.使人烦恼的→annoyance n．[U]恼火 7.congratulate vt.祝贺；庆贺→congratulation n．[C]祝贺；贺词 8.beneficial adj.有益的；受益的→benefit n．& v.利益；好处；使受益 9.approval n．[U，C]赞成；认可→approve v.支持；赞成；同意→(disapprove v.不赞成→approving adj.赞许的 10.encouragement n．[U，C]鼓励；奖励→encourage v.鼓励；鼓舞→encouraging adj.鼓舞人心的 →encouraged adj.受到鼓舞的→courage n．[U]勇气；胆量 11.disability n．[U，C]伤残；无力；无能→disable vt.使残废；使失去能力→disabled adj.伤残的 12.ambition n．[U，C]雄心；野心→ambitious adj.有雄心的；有野心的 13.noisy adj.吵闹的；喧闹的→noisily ad v.吵闹地→noise n．[U，C]噪音 14.resign vi.& vt.辞职；辞去 15.conduct n．[U]行为；品行vt.指挥；管理；主持→ conductive adj. 传导性的；有传导力的→ conduction n.传导；输送 16.entry n.项目；进入；入口→ entrance n. 入口；进入；登场→ enter v.进入 17.abolish vt.废除；废止→ abolition n.废除；废止 18.resign vi. & vt.辞职；辞去（工作；职位等）→ resignation n.辞职；辞呈 19.slavery n.奴隶制→slave n.奴隶 20.assistance n.协助；援助→ assist vt. 帮助；协助→ assistant n.助手，助理 21.architect n. 建筑师→ architecture n. 建筑学 22.adequate adj.足够的；充分的→ adequately adv.足够地；充分地→ adequacy n. 足够；适当 23.handy adj.方便的；有用的→hand n.手；协助；手艺v. 给；传 24.basement n.地下室→base n. 底部；基地；基础；基数；vt. 以... 作基础
人教版高中英语选修七秋英语U3同步综合训练及答案.docx
高中英语学习材料 ***鼎尚图文理制作*** 2016秋英语人教版选修7U3同步综合训练及答案 选修7 Unit Three Under the sea 一、语法填空 阅读下面短文，按照句子结构的语法性和上下文连贯的要求，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。 Last year，my brother and I went to Miami for a vacation.Some of my friends who had been there before said 1 was a wonderful holiday destination.Before we went，we had planned for months.When the day came，we were ready. After our plane landed，we went to the hotel.We had made our reservation six months 2 (early)，but the man at the front desk said there had been a mistake.We 3 (tell)that our rooms hadn't been reserved for that week， 4 for the week after.I didn't understand 5 this would happen and my credit card had already been charged 6 the reservation.What's worse，the hotel had been fully booked.When we were wondering what to do，the manager came out.She was 7 (surprise)helpful.She apologized for the mistake and gave us a spare VIP room on 8 top floor.We had never stayed in such an amazing room，and we weren't charged extra. The next day，my brother and I went to the beach 9 we watched some people play volleyball.We got a little 10 (sunburn)，but the day had been so relaxing that we didn't mind. 二、完形填空 Every Saturday night my family and I go out and feed the homeless people in the city of Orlando. We wanted to see__1__ it was like in the life of a homeless person. One special thing I like to__2__ is that my family and I do not eat before we begin our journey so we know how，it feels to be__3__. We all get together in the__4__ and prepare the food .Some of the meals are sandwiches and cookies and a bottle of water. Sometimes my mom __5__ a steaming hot delicious meal. We then__6__ them all up to feed 30 or more people. Before my family and I get into the car we ask God for protection in a family__7__.A lot of
新课标高中英语选修七单词(人教版)[1]
选修7 英语单词 Unit 1 a mbition 野心ambitious 有野心的adapt 使适应 adapt to 适合absence 缺席 annoy 使…不悦annoyed 颇为生气的annoyance 烦恼 all in all 总而言之 as well as 和assistance 协助 abolish 废止 abolition 废止 all the best 一切顺利architect 建筑师adequate 充分的access 方法accessible 可接近的approval 认可 b ump 撞击 bench 长凳 beneficial 有益的bowling 保龄球basement 地下室 c lumsy 笨拙的 cut out 切去 conduct 行为certificate 证书community 社会companion 伙伴congratulate 祝贺congratulation 祝贺 d ictation 听写disability 伤残 disabled 伤残的 dignity 尊严 e xit 出口 entry 入口 eyesight 视力earphone 耳机encouragement 奖励 f ellow 同类的 firm 公司 fulfilling 令人满意的 g raduation 毕业 h earing 听力 handy 有用的 i mpair 削弱 italics 斜体 in other words 换句话说in many ways 在很多方面l ap跑道的一圈 literature 文献 m eet with 遇到microscope 显微镜 make fun of 取笑mainstream 主流 n oisy 吵闹的 never mind 不必担心 o utgoing 外向的outwards 向外 out of breath 上气不接下气p arrot 鹦鹉 politics 政治学 profit 收益 psychology 心理学psychologically 心理学地r ow 一行 resign 辞去 s lavery 奴隶制syndrome 综合症状suitable 适合的 software 软件 sit around 闲坐着 t ank 大容器 tortoise陆龟 w heelchair 轮椅
最新人教版高中英语选修7课文翻译[1]-2
马蒂的故事 你好。我叫马蒂．菲尔丁。我想你可能会说我是“百万人中才有一个”的那种人。换句话说，世界上像我这样的人并不多见。你瞧，我的肌肉有毛病，使我的身体非常虚弱，所以我不能像别人那样快跑或快步爬楼梯。再说，有时候我还会笨手笨脚、不小心摔掉东西，或磕碰到家具上。不幸的是，大夫们不知道如何治好我的病，但是我很开朗乐观，学会了适应身体的残疾。我的座右铭是：活一天算一天。 十岁以前，我跟其他人是一样的。我常常爬树、游泳、踢足球。说实在的，我过去常常梦想我会成为职业球员，代表我们的国家参加世界杯足球赛。后来，我的身体开始变得越来越虚弱，以至于只能坐在体育场的长凳上欣赏足球了。最后我到医院去做了检查，几乎住了三个月的医院。我想我至少做过十亿次检查了，包括有一次检查，他们从我的腿部切下一小块儿肌肉，放在显微镜下观察。即使做过了所有这些检查，也没有人能够确诊这个病。因此，很难知道将来会是个什么样子。 问题是我看上去跟平常人一样。因此，当我跑了很短的一段路之后，我就会喘不过气来，或者爬楼梯才爬到一半就得停下来休息。因此，上小学时有的孩子见了我这种情况就会笑话我。有时候我的身体太虚弱，上不了学，因此落了许多功课。每次缺课之后，我就觉得自己很笨，因为我比别人落后了。 我在中学时期的生活(比在小学时)要轻松多了，因为我的同学开始接受了我的状况。还有些同学看不到我的内心世界，但是我并不生气，只是不去理会他们罢了。总而言之，我生活得挺好。我很高兴我能做许多事情，比如写作和电脑编程。我有雄心壮志，长大后我要在开发电脑软件的公司里工作。去年我发明了一个电脑足球游戏，有一家大公司已经决定从我这儿买走。我的生活很充实，没有时间闲坐着顾影自怜。除了同我的朋友一起去看电影和足球比赛，我还花很多时间和我的宠物在一起。我有两只兔子、一只鹦鹉、一缸金鱼和一只乌龟。我得花大量时间来照顾这些宠物，但我觉得很值。此外，我还有好多功课，特别是在病了一段时间之后。 在许多方面，我身体的残疾倒使我心理上变得更加坚强、更加独立。我必须努力工作才能过上正常的生活，但这是值得的。假如我有机会跟健康孩子讲一句话，那么，这句话就是：身体残疾并不意味着生活不美满。因此，不要感到残疾人可怜，或者取笑他们，也别不理睬他们。要接受他们，给他们以鼓励，让他们能像你一样过得丰富多彩、充实美满。 谢谢你们读我的故事。．马蒂 致建筑师的一封信桑达斯女士 爱丽斯。梅杰 总建筑师剑桥街64号 影院设计公司班克斯敦 希尔街44号 班克斯敦 20(0年9月2,4日 亲爱的桑达斯女士： 今天我从报上了解到，您将成为班克斯敦新影院的建筑设计师。我希望您不介意我写信询问您是否已考虑到残疾顾客的需要。尤其是以下几点不知您是否考虑到了： 1．为乘坐轮椅的人进入电影院提供充分的便利。影院内的各个部分都安装电梯就会很方便。电梯的按钮应当让乘坐轮椅的人容易够到，电梯门应足够宽。在有些电影院里，(残疾人专用)电梯设在影院背后阴冷而不显眼的地方。由于残疾人必须要使用这些电梯，这就使残疾人感到比别的观众低一等。 2．给听力有障碍的人提供耳机。所有座位的旁边都装有耳机，而不是少数几个座位，那会有帮助。这样可以使那些听力有缺陷的观众和那些听力正常的朋友坐在一起欣赏，而不是让前者坐在一个特定的区域。
人教版高中英语选修7内容全解
人教版高中英语必修7内容全解 话题素材——好好生活 好词 1.sympathy n. 同情 2.overcome vt. 克服 3.determination n. 决心 4.optimistic adj. 乐观的 5.progress n. 进步 6.be confident of sth. 对某事有信心 7.work together 共事；共同努力8.be active in 积极从事于 9.dream of/about 梦想…… 10.be sorry for 为……感到难过/愧疚 11.make it a rule to do sth. 做某事成为规定 12.be skilled in/at sth. 在……方面熟练 13.be available 可以利用的；有空的；可获得的 14.be in the lead 领先
15.live/lead a．..life 过……的生活 佳句 1.It_is_also_a_virtue_to forgive and forget, especially in such a competitive and stressful society. 原谅和宽恕也是一种美德，尤其是在这样充满竞争和压力的社会。 2.In the past decades, advances in medical technology have made_it_possible_for_people_to_live longer than in the past. 在过去的几十年，医疗技术的进步已经使人们比过去活的时间更长成为可能。 3.In fact, we have to admit the fact that the quality of life is as_important_as life itself. 事实上，我们必须承认，生命的质量和生命本身一样重要。 [精美语篇] Wang Hong is my classmate. She is a lovely girl. But at the age of ten，she became disabled in a big fire，which made her left eye blind and right arm lost. She didn't give up anything in spite of her disability. Not only has she learned to take care of herself，but also she encourages other disabled people to face life bravely and lead an active life. Wang Hong learns hard and takes the head in our class. And we are all inspired by her. We hope other people don't look down upon the disabled. What healthy people should do is do what we can to help them，such as making public equipment more convenient for them to use. 高频单词 1．disability (n.) 伤残；无力；无能→disabled (adj.) 伤残的 2．adapt (vt.) 使适应；改编→adaptation (n.) 适应；改编；改写本
人教版高中物理选修31知识点归纳总结.doc
物理选修3-1 知识总结 第一章 第1节 电荷及其守恒定律 一、电荷守恒定律 表述1：电荷守恒定律：电荷既不能凭空产生，也不能凭空消失，只能从一个物体转移到另一个 物体，或从物体的一部分转移到另一部分,在转移的过程中，电荷的总量保持不变。 表述2、在一个与外界没有电荷交换的系统内，正、负电荷的代数和保持不变。 二、电荷量 1、电荷量：电荷的多少。 2、元电荷：电子所带电荷的绝对值1.6×10－19 C 3、比荷：粒子的电荷量与粒子质量的比值。 第一章 第2节 库仑定律 一、电荷间的相互作用 1、点电荷：带电体的大小比带电体之间的距离小得多。 2、影响电荷间相互作用的因素 二、库仑定律：在真空中两个静止点电荷间的作用力跟它们的电荷的乘积成正比，跟它们距离的平方 成反比，作用力的方向在它们的连线上。 2 2 1r Q Q k F 注意（1）适用条件为真空中静止点电荷 （2）计算时各量带入绝对值，力的方向利用电性来判断 第一章 第3节 电场 电场强度 一、电场 电荷（带电体）周围存在着的一种物质，其基本性质就是对置于其中的电荷有力的作用。 二、电场强度 1、检验电荷与场源电荷 2、电场强度 检验电荷在电场中某点所受的电场力F 与检验电荷的电荷q 的比值。 q F E = 国际单位：N /C 电场强度是矢量。规定：正电荷在电场中某一点受到的电场力方向就是那一点的电场强度的方向。 三、点电荷的场强公式 2r Q k q F E == 四、电场的叠加 五、电场线 1、电场线：为了形象地描述电场而在电场中画出的一些曲线，曲线的疏密程度表示场强的大小，
曲线上某点的切线方向表示场强的方向。 2、几种典型电场的电场线 3、电场线的特点 （1）假想的 （2）起----正电荷；无穷远处 止----负电荷；无穷远处 （3）不闭合 （4）不相交 （5）疏密----强弱 切线方向---场强方向 第一章 第4节 电势能 电势 一、电势能 1、电势能：电荷处于电场中时所具有的,由其在电场中的位置决定的能量称为电势能. 注意：系统性、相对性 2、电势能的变化与电场力做功的关系 3、电势能大小的确定 电荷在电场中某点的电势能在数值上等于把电荷从这点移到电势能为零处电场力所做的功 二、电势 1.电势：置于电场中某点的检验电荷具有的电势能与其电量的比叫做该点的电势 q E 电= ? 单位：伏特（V ） 标量 2.电势的相对性 3.顺着电场线的方向，电势越来越低。 三、等势面 1、等势面：电场中电势相等的各点构成的面。 2、等势面的特点 a:在同一等势面的两点间移动电荷，电场力不做功。 b:电场线总是由电势高的等势面指向电势低的等势面。 c:电场线总是与等势面垂直。 第一章 第5节 电势差 电场力的功 一、电势差：电势差等于电场中两点电势的差值 B A AB U ??-= 电电电电电电）＝－－＝－（－＝E E E E E W A B B A AB ?)(电势能为零的点点电＝A A W E
【名师整理】2020人教版高中英语同步单元词汇阅读理解串记(选修七)
新课标人教版选修7课文单元词汇串记 (B7 U1) Defeat Disability Yang’s ambition was to get an architect certificate or become a bowling master. But when he was conduct ing experiments with a microscope in the basement, a tank on the bench exploded, sending him flying outwards through the exit. He was out of breath while knowing he lost his eyesight as well as 70% of his hearing. In other words, he was disabled. Feeling clumsy, he was annoy ed at first though nobody made fun of him. He cut out going outdoors and just sat around at home talking to his parrot or tortoise silently. His sister resign ed to help him in many ways. Her assistance and encouragement were so beneficial to his psychology that he adapt ed to his disability soon and became outgoing again. In a college accessible to him, he studied politics and literature. He always sat in the front row near the entry without any absence and, with the help of his handy laptop, he studied well by means of dictation. His thesis, Abolish ing Slavery, met with all professors’ approval. After class, he and his companion s often played drum music, which was noisy but suitable for his hearing. After graduation, he made high profit s by designing software for a firm. All in all, in his community, he won his dignity and people’s congratulations. He always wished all the best to his disabled fellow s and encouraged them, “Never mind! All you have is adequate to get your achievement.” 中文翻译： 战胜残疾