MIT-SCIENCE-Lectures-13bingopretverbreg
他做出了史上最变态课程,挂科率90%,MIT大牛却抢破头
他做出了史上最变态课程，挂科率90%，MIT大牛却抢破头酷玩实验室作品最近后台总有小伙伴问我蛋蛋姐，我想学编程，怎么开始？或者是蛋蛋姐，我数学特别差，还有办法成为工程师吗？讲真，我还真知道一个人他能帮助你们教会你想学的一切这个事情是这样的：在麻省理工这个聚集了人类最高智商的地方有一门课仍然有90%的挂科可能这门课叫做《如何自制一切》How to make almost anything主导这门课的令人闻风丧胆的教授名叫Neil GershenfeldNeil 是研究数字制造的其实我也不知道具体是什么意思但是总而言之他可以用包括激光切割机、3D打印机等等的设备制作出很多很多东西用他的话说用他的办法可以制造出你想自制的一切他曾经在实验室花了大概50万美元购置了所有需要的设备然后他发现这些设备根本用不上因为学生们完全不知道该怎么用在很长一段时间里Neil的所有精力都花在了教学生使用这些设备上于是他想，既然如此我干脆开一门课系统地来教大家使用这些器材吧这就是这门可怕的课《如何自制一切》How to make almost anythingNeil 在第一天上课时就会让你深思熟虑是否要退课因为在这一个学期里你需要DIY出一件尚不存在的能够被用得上的物品而且为了实现这个任务你需要学习：如何自制网站、3D设计和建模、交互设计、电路设计、掌握机械原理，并且自己完成编程所以你需要大量的基础知识比如设计、编程的基础假如你什么都不会的话你很可能一整个学期都在学怎么制作网站。
然后就挂科了。
这门课到底有多难呢？据说这门课有一般有60个学生都是MIT的研究生然后会有一个教学团队由44位教授、研究员、助教构成恩，也就是说，平均2个人服务3个人大部分人还是挂科了。
怎么样，是不是看得有种热血沸腾的赶脚。
呵呵哒。
给你看一下我们的课程大纲好了不要太爱我以第4节课：3D扫描和3D打印为例基本上你在这门课里可以学到关于3D打印和3D扫描的一切无论是原理（指南，论文）还是产品（现有哪些产品可以用）还是软件（常用的开源的闭源的软件）以至于材料（去哪买组装和打印需要的材料）Neil教授的网页上有所有的跟3D打印和扫描有关的资源网站上的每一个链接都可以打开里面是详细到吓死人的资料这一节课的课后作业是这样的：设计一个在不用3D打印的情况下很难制作的物件，再做一个3D扫描的工具。
2024年人教版四年级上册英语第二单元课后练习题(含答案和概念)
2024年人教版四年级上册英语第二单元课后练习题（含答案和概念）试题部分一、选择题：1. Which word is the opposite of "big"? ( )A. smallB. tallC. shortD. youngA. bigB. smallC. tallD. short3. What is the plural form of "child"? ( )A. childsB. childC. childrenD. childes4. Which letter makes the /k/ sound in the word "king"? ( )A. kB. cC. qD. g5. Which word is a noun? ( )A. runB. jumpC. bookD. happyA. tallB. tallerC. tallestD. talling7. What is the past tense of "go"? ( )A. goedB. goC. wentD. gone8. Which word means "not"? ( )A. noB. notC. nonD. none9. Which word is an adjective? ( )A. runB. quicklyC. fastD. runningA. rideB. ridingC. ridedD. rides二、判断题：1. "Cat" and "dog" are both nouns. ( )2. The word "run" can be a noun. ( )3. "She" and "he" are pronouns. ( )4. The word "big" is an adjective. ( )5. "I am" and "he is" are both present tense. ( )6. The past tense of "read" is "red". ( )7. "Eat" and "ate" are the same word. ( )8. "Jump" and "jumps" are the same tense. ( )9. "Go" and "went" are the same word. ( )10. "Yes" and "no" are both adjectives. ( )三、填空题：1. The opposite of "hot" is ________.2. I ________ a book every day.3. She is ________ than her mother.4. The sun ________ in the sky.5. My birthday is in ________.6. He ________ to school bus.7. We ________ to the park yesterday.8. The cat is ________ the table.9. I can ________ a bicycle.10. She ________ her homework in the evening.11. ________ is your favorite color?12. They are ________ in the classroom.13. I ________ an apple and a banana.14. He ________ to the library every weekend.15. She ________ a letter to her friend.16. ________ are you from?17. The dog is ________ the garden.18. I ________ a cake for my birthday.19. They ________ a movie last night.20. ________ is your favorite subject?四、简答题：1. What is the capital city of France?2. How many days are there in a week?3. What is the opposite of "happy"?4. Write a sentence using the word "because".5. What is the past tense of "write"?6. Describe your best friend.7. What do you do in the morning?8. Why is reading important?9. What is your favorite season and why?10. Write a sentence using the word "although".三、填空题答案：1. cold2. read3. shorter4. shines5. June6. goes7. went8. under9. ride10. does11. What12. sitting13. eat14. goes15. wrote16. Where17. in18. made19. saw20. Math四、简答题答案：1. Paris2. Seven3. sad4. I stayed home because it was raining.5. wrote6. My best friend is kind and funny. We like to play soccer together.7. I brush my teeth, eat breakfast, and go to school.8. Reading is important because it helps us learn new things and improves our vocabulary.9. My favorite season is summer because I like to go swimming and enjoy the warm weather.10. Although it was late, she decided to finish her homework.词汇：题目涉及了反义词、动词形式、形容词比较级、名词单复数等基础词汇知识。
MIT-SCIENCE-Lectures-drkp_tn_al_nul
An important and easy-to-neglect issue in building the frame is the weight of the water it will need to support.One cubic foot of water contains about 71/2 gallons and weighs approximately 63 pounds [2]. For a pool of any reasonable size, this quickly adds up; for large volumes of water, careful structural analysis will be important to ensure that the frame will be able to hold the weight, especially if the pool is being recessed into a platform. One simple way to minimize the amount of water used and thus the amount of weight that must be supported is to make the pool less deep; this is often a very reasonable option since the actual depth of the pool will always not be obvious to the audience.The frame should then be covered with plywood (given the loads it will be sup-porting, something substantial like 3/4 ′′ plywood should be used. It then needs to be covered with a pond liner so that it can be filled with water. These are readily available from garden stores as waterproof plastic sheets, which can be cut to size and fit into the pool.The pool can then be filled with water. Once filled, it should be emptied or changed regularly — the last thing anyone needs on the stage is a place for bacteria and other unpleasant things to grow, and a stagnant pool of water fits that bill all too well. A pool treatment can also be useful here, though ones containing chlorine are not ideal due to their distinctive smell.3 Building the waterfallMany of the same techniques from building a pool of water apply to building a waterfall. Again, we will need to use a waterproof pond liner around a frame and support structure. The difference, of course, is that the waterfall will be a stream (albeit one that sometimes flows horizontally and sometimes flows vertically), so it will not have as much depth.This allows the support structure to be more lightweight.A common means for building streams is to construct a set of curved ribs, then lay a thin layer of plywood or lauan over it that conforms to the curve of the ribs. This should then be covered with the pond liner.The water should flow through the stream and down the waterfall into the pool, which serves as a reservoir. It then needs to be returned to the top of the waterfall; for this, a pump is required. A household sump pump, available from the Home Depot or similar hardware store in the $100 range, is probably the easiest option.ℵ0-2For especially large installations, a common pump may not suffice. One option is to obtain a larger pump; McMaster-Carr carries sump pumps up to 3/4 hp and effluent pumps up to 2 hp, though the latter may be a bit expensive for this purpose at over $700[3]. A simple alternative is to use multiple smaller pumps. Submersible pumps are best for this application: other types of pumps may allow the pump to be placed further away from the pool, reducing noise, but adding a drain to the pool requires creating and sealing a hole in the liner, which only adds complexity. Sump pumps may pump into a standard garden hose, which is certainly easy to find and easy to work with. However, the pump will be able to operate more efficiently if PVC pipe (usually or 11/2 ′′ , though it depends on the pump) is used.11/4 ′′The pressure created by a pump, especially a large one, may be rather high. This could lead to the unusual effect of the water spewing forcefully upward or in a powerful stream — which, while useful for a fountain, isn’t very realistic in a stream effect.The solution here is to increase the diameter of the pipe by using couplers with successively larger diameters. This causes the same amount of water to flow through a larger area, and thus with less force.Waterfalls and streams are generally rather noisy. The sound of water flowing down the stream and into the pool can be a rather pleasant one, and can be a helpful part of the sound design for creating the outdoor atmosphere. If, however, that doesn’t fit with the sound designer’s vision, it becomes the technical designer’s problem to fix.Reducing the velocity of the flowing water is an obvious solution with an obvious drawback.Adding rocks and similar objects to the stream will help reduce the volume of water that needs to flow, reducing the noise created (and also allowing a smaller, quieter pump to be used). It is also quieter to not have water fall directly from the waterfall into the pool; instead, it should flow onto a surface that slopes into the pool.References[1] M. Powers, “Pools, waterfalls, etc.” available at /howto/water/pools.htm.[2] P. Carter, Backstage Handbook, 3rd ed. Louisville, Kentucky: Broadway Press,1994.ℵ0-3[3] McMaster-Carr, Inc. /.ℵ0-4。
MIT基础数学讲义(计算机系)lecture1
Lecture 1 5 Sep 97
What is a Proof? 1 What is a Proof?
Axiom 1 If a = b and b = c, then a = c.
This seems very reasonable! But sometimes the right choice of axiom is not clear.
Axiom 2 (Euclidean geometry) Given a line l and a point p not on l, there is exactly one line
many lines through p parallel to l.
No one of the three preceding axioms is better than the others all yield equally good proofs. Of course, a di erent choice of axioms makes di erent propositions true. Still, a set of axioms should not be chosen arbitrarily. In particular, there are two basic properties that one would want in any set of axioms it should be consistent and complete.
外研版英语初二上学期期中试卷及解答参考
外研版英语初二上学期期中复习试卷及解答参考一、听力部分（本大题有20小题，每小题1分，共20分）1、What does the boy want for breakfast?A) Toast and tea.B) A sandwich and coffee.C) Pancakes and orange juice.Answer: C) Pancakes and orange juice.Explanation: In the dialogue, the mother asks the boy what he would like to eat in the morning. The boy responds by saying he’s craving something sweet and not too heavy, which leads him to request pancakes. He also mentions that he’d prefer orange juice t o wash it down rather than a heavier drink like milk or coffee.2、Where did the girl lose her backpack?A) At the library.B) On the school bus.C) In the park.Answer: A) At the library.Explanation: During the conversation between the girl and her friend, she recalls the last place she remembers having her backpack with her was when she was studying at the library. She mentioned she had taken it off to sit morecomfortably and must have forgotten to take it with her when she left.3.You are listening to a conversation between two friends, Alice and Bob. They are discussing their weekend plans. Listen to the conversation and answer the following question:How does Alice feel about Bob’s suggestion for the weekend?A. ExcitedB. UninterestedC. SadD. AnnoyedAnswer: AExplanation: In the conversation, Alice responds with enthusiasm to Bob’s suggestion, indicating that she is excited about it.4.Listen to a short dialogue between a teacher and a student about a school project. The student is asking for clarification on the requirements. Listen and answer the following question:What does the teacher say is the deadline for the project?A. Next FridayB. Two weeks from todayC. This FridayD. Next MondayAnswer: BExplanation: The teacher explicitly states that the project is due two weeksfrom today, which corresponds to option B.5、Listen to the conversation and answer the question.M: Hi, Lisa, how was your trip to Beijing last weekend?W: It was amazing! I saw the Great Wall and the Forbidden City. Do you know what I found most surprising?M: No, what was it?W: The Great Wall is so huge that I couldn’t even see the end of it from one side. It’s like a giant snake winding through the mountains.Question: What was the woman most surprised about her trip to Beijing?A. The Forbidden City.B. The Great Wall.C. The mountains.D. The weather.Answer: BExplanation: The woman mentions that she found the Great Wall “so huge that I couldn’t even see the end of it from one side,” indicating that it was the most surprising aspect of her trip.6、Listen to the passage and complete the following sentence.The Internet has revolutionized the way we communicate. It allows us to connect with people from all over the world in just a few clicks. One of the most popular ways to communicate online is through social media platforms. These platforms have become an integral part of our daily lives, helping us stay connected withfriends, family, and colleagues. However, they can also have negative effects on our mental health if used excessively. It is important to maintain a healthy balance between online and offline activities.Question: What is one of the most popular ways to communicate online?A. Email.B. Video calls.C. Social media platforms.D. Instant messaging.Answer: CExplanation: The passage directly states, “One of the most popular ways to communicate online is through social media platforms.”7.You are listening to a conversation between two friends, Alice and Bob. They are discussing their weekend plans.Alice: Hi Bob, do you have any plans for the weekend?Bob: Yeah, actually, I’m planning to go hiking in the mountains.Alice: That sounds amazing! Are you going alone?Bob: No, I’m bringing along a group of friends.Alice: How long do you think it will take to complete the hike?Bob: It should take us about 4 hours to get to the top and then another 3 hours to come back down.Question: How long will Bob and his friends be hiking in total?A) 7 hoursB) 6 hoursC) 5 hoursD) 4 hoursAnswer: A) 7 hoursExplanation: Bob mentioned that it would take them 4 hours to reach the top and another 3 hours to come back down, which totals to 7 hours of hiking.8.Listen to a short dialogue between a teacher and a student, discussing the student’s grades.Teacher: Hi Sarah, how are your grades so far this semester?Sarah: Hi Mr. Smith, they’re okay. I’m a bit worried about my math grade.Teacher: I see. What’s the issue?Sarah: Well, I’ve been struggling to understand some of the more complex problems.Teacher: I understand. Let’s schedule a study session for next week. We’ll go over the topics you’re having trouble with.Sarah: That sounds great, thank you, Mr. Smith.Question: What does Sarah need help with?A) Her writing skillsB) Her science gradeC) Her math gradeD) Her reading skillsAnswer: C) Her math gradeExplanation: Sarah explicitly mentions that she is worried about her math grade and struggling to understand complex problems, indicating that she needs help with her math grade.9.You are listening to a conversation between a student and a teacher.Student: Professor, I’m really struggling with the new math ass ignment. Could you help me understand it better?Teacher: Of course! The first thing you need to do is to break down the problem into smaller parts. Let’s go through it step by step.Question: What is the student asking the teacher?A. To borrow the teache r’s math book.B. To help with the new math assignment.C. To explain the grading system.D. To cancel the upcoming math test.Answer: BExplanation: The student says, “I’m really struggling with the new math assignment,” which indicates that they are aski ng the teacher for help with their assignment.10.You are listening to a news report about a recent event in the city.Anchor: Good evening, everyone. We have some breaking news to report. A major traffic accident occurred earlier today on Route 5. According to our sources, several vehicles were involved in the collision, and emergency services are currently on the scene.Question: What is the news report primarily about?A. A new shopping center opening in the city.B. A recent traffic accident on Route 5.C. The city’s new recycling program.D. A sports event being held in the city.Answer: BExplanation: The news report specifically mentions a “major traffic accident” and provides details about the incident, such as the location and the involvement of emergency services, making option B the correct answer.11.You are listening to a conversation between two students, Alice and Bob, talking about their weekend plans.Question: What does Alice plan to do on Saturday afternoon?A. Go shopping.B. Visit a friend.C. Watch a movie.Answer: BExplanation: In the conversation, Alice says, “I’m planning to visit my friend on Saturday afternoon.” Therefore, the correct answer is B.12.You are listening to a teacher, Mr. Smith, giving instructions to his students about a school project.Question: What are the students supposed to do for the school project?A. Write a report.B. Prepare a presentation.C. Conduct an experiment.Answer: BExplanation: Mr. Smith mentions, “Each group is required to prepare a presentation about the topic.” Hence, the correct answer is B.13.Listen to the conversation between two students, Tom and Lucy, talking about their weekend plans. Choose the best answer to complete the sentence.Tom: “Hey Lucy, are you going anywhere this weekend?”Lucy: “Yeah, I’m planning to visit my grandparents. How about you?”Tom: “I’m not sure yet. Maybe I’ll go hiking or stay at home and study.”What is Tom’s current plan for the weekend?A. To visit his grandparents.B. To go hiking.C. To stay at home and study.D. Not mentioned.Answer: CExplanation: In the conversation, Tom says, “I’m not sure yet. Maybe I’ll go hiking or stay at home and study.” This indicates that he has not decided on his plan yet, but he has mentioned two possibilities: going hiking or staying at home to study. However, since the question asks about his current plan, the correct answer is that his plan is not mentioned.14.Listen to a short passage about different types of sports equipment.Answer the question by choosing the correct option.Question: What is the main purpose of wearing a helmet while playing ice hockey?A. To protect the player’s neck.B. To protect the player’s head.C. To protect the player’s hands.D. To protect the player’s feet.Answer: BExplanation: The passage mentions that wearing a helmet is essential for sports like ice hockey. It states, “A helmet is worn to protect the player’s head from injuries.” Therefor e, the main purpose of wearing a helmet while playing ice hockey is to protect the player’s head.15.You are listening to a conversation between two students, Alice and Bob, discussing their weekend plans.Alice: Hey Bob, what are you planning to do this weekend?Bob: I’m thinking of going hiking with a group of friends. How about you, Alice?Alice: That sounds fun! I was actually planning to go to the library to study for my upcoming exams.Question: What is Bob planning to do this weekend?A. Go to the libraryB. Go hiking with friendsC. Study for examsD. Visit a friendAnswer: BExplanation: In the conversation, Bob mentions that he is planning to go hiking with a group of friends, which is option B.16.You are listening to a weather forecast for a major city.Weather Forecast: The weather forecast for today is as follows. It will be partly cloudy with a high of 25 degrees Celsius. There is a 30% chance of scattered showers in the afternoon. The wind will be blowing at 10-15 kilometers per hour from the east.Question: What is the expected weather condition in the afternoon?A. ClearB. RainyC. SunnyD. CloudyAnswer: BExplanation: The weather forecast states that there is a 30% chance of scattered showers in the afternoon, indicating that the weather will be rainy.17.You are listening to a conversation between two students discussing their weekend plans.Student A: Hi, Mark. What are you doing this weekend?Student B: Oh, I’m planning to go hiking in the mountains. It’s supposed tobe a beautiful day.Student A: That sounds great! Are you going alone?Student B: No, I’m bringing my sister along. She’s an experienced hiker. Student A: Wow, that’s impressive. I wish I had someone to go with me. Student B: Well, maybe next time. How about you? What are your plans? Student A: I’m actually going to visit my grandparents in the countryside. It’s been a while since I’ve seen them.Student B: That’s a nice way to spend your weekend. Enjoy your time with them!Question: What is Mark planning to do this weekend?A) Visit his grandparentsB) Go hiking with his sisterC) Spend time aloneD) Have a party with friendsAnswer: B) Go hiking with his sisterExplanation: In the conversation, Mark mentions that he is planning to go hiking in the mountains and he will be bringing his sister along, indicating that the correct answer is B) Go hiking with his sister.18.You are listening to a radio report about a new health trend.Narrator: According to recent studies, there’s a new health trend that’s gaining popularity. It’s called “Forest Bathing,” or “Shinrin-Yoku” in Japanese. This practice involves spending time in nature, particularly in forests, to improve mental and physical health.Question: What is the new health trend called?A) Nature WalkB) Forest BathingC) Shinrin-YokuD) Outdoor FitnessAnswer: B) Forest BathingExplanation: The radio report specifically mentions “Forest Bathing” as the new health trend, so the correct answer is B) Forest Bathing. The other options are not mentioned in the report.19.You are listening to a conversation between two friends, Alex and Sam. They are discussing their weekend plans.Alex: “Hey Sam, what are you doing this weekend?”Sam: “I’m thinking of going hiking in the mountains. How about you?”Alex: “That sounds great! I was planning to visit my grandparents. But maybe I can go hiking with you instead.”Sam: “Sure, I’d love that! We can make it a double adventure.”Question: What is Alex originally planning to do this weekend?A) Visit his grandparentsB) Go hikingC) Go to the mountainsD) Have a double adventureAnswer: A) Visit his grandparentsExplanation: The question asks about Alex’s original plan. In the conversation, Alex mentions, “I was planning to visit my grandparents,” indicating that this was his original plan before considering hiking with Sam.20.You are listening to a weather report for the city of New York.Weather Report: “The current temperature in New York is 15 degrees Celsius. There is a 70% chance of rain in the next few hours. The wind is blowing at 10 kilometers per hour from the northeast. Temperatures will drop to around 10 degrees overnight.”Question: What will the temperature be overnight in New York?A) 15 degrees CelsiusB) 10 degrees CelsiusC) 5 degrees CelsiusD) 20 degrees CelsiusAnswer: B) 10 degrees CelsiusExplanation: The weather report states, “Temperatures will drop to around 10 degrees overnight,” which directly answers the question about the overnight temperature in New York.二、阅读理解（30分）Reading ComprehensionPassage:In the small town of Maplewood, there was once a lively library that wasthe heart of the community. The library was known for its wide variety of books, friendly staff, and cozy atmosphere. However, over the years, the library faced many challenges, including a declining number of visitors and financial difficulties.One day, a young librarian named Emily decided to take matters into her own hands. She believed that the library needed to adapt to the changing times and attract more people to its doors. With the help of her colleagues, Emily came up with a plan to revitalize the library.They started by hosting a series of events and workshops, including storytelling sessions, book clubs, and art classes. They also introduced new technology, such as e-readers and online resources, to make the library more accessible to the community. As a result, the library began to attract more visitors, and its popularity grew.One of the most successful events was a book fair, which was held in the library’s parking lot. The fair featured a variety of books, from classic literature to the latest bestsellers. Local authors and illustrators were invited to participate, and many people from the community came to support the event. The fair not only generated revenue for the library but also brought the community together.As the library’s popularity grew, Emily and her colleagues continued to innovate. They started a community garden outside the library, which provided a space for people to learn about gardening and connect with nature. They alsopartnered with local schools to create a reading program that encouraged students to visit the library regularly.Today, the Maplewood Library is thriving. It is a place where people of all ages come to learn, grow, and connect. Thanks to Emily’s vision and determination, the library has become an integral part of the community once again.Questions:1.What was the main problem faced by the Maplewood Library?A. A lack of booksB. A declining number of visitorsC. Financial difficultiesD. A lack of technology2.Which of the following events was NOT part of Emily’s plan to revitalize the library?A. Storytelling sessionsB. Book clubsC. Art classesD. Hosting a movie night3.How did the book fair contribute to the library’s popularity?A. It helped generate revenue for the library.B. It brought the community together.C. It encouraged students to visit the library regularly.D. All of the above.Answers:1.B. A declining number of visitors2.D. Hosting a movie night3.D. All of the above.三、完型填空（15分）Section III: Reading Comprehension (10 points)Read the following passage and fill in each blank with one of the words given below. There are two extra words which do not fit into the passage.Last year, my family and I decided to take a trip to the countryside. We were looking forward to a relaxing weekend away from the hustle and bustle of the city. Our plan was to visit a small village that my grandparents had often talked about.On our first morning, we woke up early and had a quick breakfast. After packing our bags, we set off in our car. The journey was longer than we expected, but the beautiful scenery along the way made it worth it. We passed through lush green forests and over rolling hills. The air was fresh and the sky was clear blue.As we arrived in the village, we were greeted by the friendly villagers. They were eager to share their stories and traditions. We spent the afternoon exploring the village, visiting the local market, and trying some deliciouslocal food. One of the highlights was a traditional folk music performance that evening. The music was so captivating that we couldn’t help but dance in the street.However, we soon realized that the weekend was not going to be as relaxing as we had hoped. The village was very lively, with people constantly coming and going. We tried to find a quiet spot to rest, but it was impossible. The noise and activity were overwhelming.1.We were looking forward to a______weekend away from the city.a.peacefulb.noisyc.busyd.quiet2.The journey was______than we expected.a.shorterb.longerc.quickerd.slower3.The scenery along the way was ______.a.boringb.beautifulc.uglyd.confusing4.The villagers were ______.a.unfriendlyb.friendlyc.silentd.distant5.The folk music performance was ______.a.boringb.fascinatingc.monotonousd.annoyingAnswers:1.a. peaceful2.b. longer3.b. beautiful4.b. friendly5.b. fascinating四、语法填空题（本大题有10小题，每小题1分，共10分）1、The cat,___________usually sleeps in the sun, is black.A. whichB. thatC. whoD. it答案：A解析：本题考查定语从句的关系词。
MIT-SCIENCE-Lectures-ps5q
where c1 and c2 are constants greater than or equal to one which parameterize the disutility of effort. Assume that it is common knowledge that c2 is equal to one, but that c1 is known only to player 1, with player 2’s prior being that nature chooses c1 from the probability density function 2 5 x if x ∈ [2, 3] f (x) = 0 otherwise. Find the Bayesian Nash equilibrium of this game. 4. Consider the following strategic situation. Two opposed armies are poised to seize an island which is currently unoccupied. Each army’s general can choose either to “attack” or to “not attack”. In addition, each army is either strong or weak with its strength being known to its general alone. General 1’s prior is that army 2 is strong with probability 1 2 (and that this event is independent of army 1’s strength) and general 2’s prior is that army 1 is strong with independent probability 1 3 . These priors are common knowledge among the players. Suppose that the payoffs in the game are reflect additively both the benefit of capturing the island and cost suffered in fighting. Specifically assume that the island is worth M if captured, and that an army captures the island if and only if it attacks when its opponent does not or it attacks when its rival does also, but it is strong and its rival is weak. (Note that when two weak or two strong armies fight neither captures the island.) The cost of fighting is s if an army is strong and w if an army is weak (with s < w) regardless of the strength of the attacking rival army (with no fighting costs being incurred if one or both armies choose not to attack and there is no battle). Identify all of the pure strategy Bayesian Nash Equilibria of this game. 5. Glenn Ellison and Josh Angrist are trying to meet for lunch. At twelve o’clock each of them must go to one of two places: Florentina’s or the trucks behind the swimming pool. Because they need to talk about something, assume that each receives a benefit of 2 3 utils if they meet. Assume also that each incurs a disutility cost of w from waiting in line outside Florentina’s in the cold. Because Josh came in on the subway just before noon he knows how long the Florentina’s line is, i.e. he knows w, while Glenn’s prior is that w is distributed uniformly on [0, 1]. While it is common knowledge that Josh is completely indifferent between the food choices at each place, assume that Glenn incurs a disutility of 3d if he eats at the trucks. The strength of Glenn’s dislike for the trucks varies from day to day — assume that Glenn knows d while Josh’s prior is that d is distributed uniformly in [0, 1]. To summarize the payoffs, when the wait at Florentina’s is w and Glenn’s disutility from going to the trucks is d the payoffs in the game are (with Josh as player 1)
MIT-SCIENCE-Lectures-lec13a
where �b is the buoyancy difference across the base of the mixed layer. Then the rate of increasing PE is P Efe = �bhwe /2 (12.7) where we = dh/dt, the entrainment velocity. Energy balance If the rate of increase of PE due to entrainment is equal to the TKE fluxes due to buoyancy forcing and wind stress (minus that component lost to dissipation) then P Efe = T KEfw + T KEfb± B 0 + |B 0 | B0 − |B0 | +n �bwe h/2 = mu + 2 2
Course requirements Class attendance and discussion, bi-weekly homework assignments, final exam.
Reference texts Andrews, Holton, and Leovy, “Middle atmosphere dynamics”
�3
�
h 2
(12.8)
Then we , the entrainment rate can be found: we = (2/h)mu�3 + [(B0 − |B0 |) + n(B0 + |B0 |)]/2 �b (12.9)
If the buoyancy flux is stabilizing and sufficiently strong to counteract the effect of the wind, then this will give we < 0. In this case, h is reduced so that we = 0. This gives 2mu�3 h= (12.10) −B0 This agrees with the Monin-Obukhov length scale if m = 1/(2�) = 1.25. The tracers in the m.l. are then modified by entrainment:
MIT-SCIENCE-Lectures-lec1present
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河南省南阳市英语初一上学期试题与参考答案(2024年)
2024年河南省南阳市英语初一上学期自测试题与参考答案一、听力部分（本大题有20小题，每小题1分，共20分）1、Question: How old is the student who is speaking?A) 12 years oldB) 13 years oldC) 14 years oldD) 15 years oldAnswer: B) 13 years oldExplanation: The student mentions in the conversation that they just started their first year of high school, which is typically the age of 13 in many educational systems.2、Question: What is the student’s favorite subject?A) MathB) EnglishC) ScienceD) HistoryAnswer: C) ScienceExplanation: The student explicitly states during the conversation thattheir favorite subject is science, showing a keen interest in the subject.3.Listen to the following dialogue and choose the best answer to the question you hear.A. They are discussing their weekend plans.B. They are comparing their favorite foods.C. They are asking for directions.D. They are talking about the weather.Answer: AExplanation: The dialogue is about their weekend plans, so the correct answer is A. They are discussing their weekend plans.4.Listen to the following conversation and choose the best answer to the question you hear.A. The man is asking the woman for a favor.B. The woman is explaining her schedule.C. The man is offering to help the woman.D. The woman is inviting the man to an event.Answer: CExplanation: The man is offering to help the woman, which means the correct answer is C. The man is offering to help the woman.5、You hear a conversation between two friends at a bookstore. The first friend says, “I’ve been looking for a book on ancient history for a while now. Any suggestions?”A)The second friend suggests a book on modern history.B)The second friend suggests a book on science.C)The second friend suggests a book on ancient history.D)The second friend suggests a book on art history.Answer: CExplanation: The first friend mentions looking for a book on ancient history, so the second friend’s suggestion should be related to that topic. Therefore, the correct answer is C, as it suggests a book on ancient history.6、You hear a teacher explaining a new concept in mathematics to the class. The teacher says, “In order to solve this problem, we need to understand the concept of factors and multiples.”A)The teacher is discussing geometry.B)The teacher is discussing algebra.C)The teacher is discussing trigonometry.D)The teacher is discussing statistics.Answer: BExplanation: The teacher mentions the concept of factors and multiples, which are related to algebra. The other options (geometry, trigonometry, and statistics) are not directly related to the concepts of factors and multiples. Therefore, the correct answer is B, as it suggests the teacher is discussing algebra.7、Listen to the following conversation and choose the best answer for each question.A. Where are they going for the weekend?B. What are they planning to do on Friday evening?C. How will they get to the city?W: Hi, Mark! Have you decided where to go for the weekend?M: Yeah, we’re thinking about going to the city. There are so many interesting places to visit there.W: That sounds great! When are you leaving?M: We’re planning to leave on Friday evening. We’ll drive there.W: How long will it take to get there?M: About three hours, depending on the traffic.Questions:1.What are they discussing?A. A movie they watched last night.B. A weekend trip.C. Their favorite restaurant.2.Where are they planning to go?A. The city.B. The countryside.C. The beach.3.When are they planning to leave?A. On Friday evening.B. On Saturday morning.C. On Sunday afternoon.Answers:1.B2.A3.A解析：1.通过对话内容可知，他们正在讨论周末去哪里玩，所以答案是B。
中英双语狭义相对论公开课
关于狭义相对论的公开课，以下是一些推荐的选项：Here are some recommended options for an open class on special relativity:MIT公开课：物理学-狭义相对论：这门课程由MIT提供，涵盖了狭义相对论的核心概念，包括长度收缩、时间膨胀、洛伦兹变换、相对论运动学和多普勒频移等。
共计52条视频，适合对狭义相对论有深入了解需求的学习者。
MIT Open Course: Physics - Special Relativity: This course is provided by MIT and covers the core concepts of special relativity, including length contraction, time dilation, Lorentz transformation, relativistic kinematics, and Doppler shift. A total of 52 videos are suitable for learners who have a deep understanding of special relativity.北京师范大学公开课：相对论：这是由梁灿彬教授讲解的公开课，涵盖了相对论的广泛内容。
该课程共有148集，适合初学者和进阶学习者。
Beijing Normal University Open Course: Relativity: This is an open course taught by Professor Liang Canbin, covering a wide range of topics in relativity. This course has a total of 148 episodes, suitable for beginners and advanced learners.狭义相对论简明教程：这个教程适用于初中生和高中生，旨在让他们能够听懂相对论的基本概念。
研词电子讲义Unit13
Unit 13complaint1.plainplain3.explain explanationnecessity1.necessary2.necessarilynecessity2015翻译Of necessity, colonial America was a projection of Europe.参考译文：不可避免地，殖民地时期的美国反映出欧洲的特点。
release1.leashunchreleaserelease2014阅读4"The Heart of the Matter," the just-released report by the American Academy of Arts and Sciences (AAAS), deserves praise for affirming the importance of the humanities and social sciences to the prosperity and security of liberal democracy in America.参考译文：美国人文与科学院（AAAS）最新发布的研究报告《问题的核心》值得称赞，因为其肯定了人文学科和社会科学对美国自由民主体制的安全和繁荣的重要性。
operate1.operation2.operational3.operatorfade2017翻译(46) but even as the number of English speakers expands further there are signs that the global predominance of the language may fade within the foreseeable future.参考译文：(46) 但是即使当下英语使用者的人群还在进一步扩大，仍有迹象表明：在可预见的未来，英语可能会逐渐失去其全球主导地位。
2023年陕西省专升本英语考试真题及答案
2023年陕西省专升本英语考试真题及答案全文共6篇示例，供读者参考篇12023 Shaanxi English Upgrade Test: A Kid's TakeHi guys! My name is Lili and I'm a 4th grader here in Xi'an. My big sister Meimei just took this crazy important English test called the Shaanxi Province Exam for Upgrading from Junior College to Bachelor's Degree Programs. She studied sooooo hard for months! I helped her practice some of the speaking parts. It was nuts!Meimei said the reading section was first. They had to read some long passages about things like environmental science, modern technology, and Chinese economics. Then they had to answer multiple choice questions testing if they understood the main ideas, details, vocabulary from context, and the author's purpose and tone. Meimei struggled a bit with the economics passage cuzbiz English has lots of hard words.Next was the listening part. They played recordings of lectures, conversations, and radio shows. The questions were also multiple choice, asking whatthe main ideas were, whothespeakers were, their opinions on things, and other details. Meimei said one conversation was really fast between two professors arguing aboutclimate change data. She missed a couple questions on that one.Then came the writing section - two tasks. First was an email responding to a situation, like applying for a job or complainingabout a product. Meimei had to write a proper email with greeting, bodyldear Mrs.Smith, I am writing to express my sincere interest in the positionof...>, and a closing. The second task was a longessayarguingfor or against some controversial statement. Meimei wrote about whether aiunsurism should be banned. She tried to have good examples, reasoning, vocabulary, and organization for thisone.Meimei's favorite was the speaking section at the end. She had to have a "conversation" with a computer by listening to questions or prompts, then speaking her responses into a mic. Things like introducing herself, explaining a concept, stating anddefendingan opinion, and proposingasolution to some problem. The computer didn't actually understand or respond to her - it just recorded her speaking for the graders to listen to later. Meimei saidthiswas where practicing with me reallypaidoff!When it was all over, Meimei felt pretty good about mostof it, but knew she probably made some silly mistakes here and there. Now we're all just waiting for her score to see if she qualifies toenter the bachelor's degreeprogramor has to take the test again next year. Keeping our fingerslittlefingers> crossed!Okay, wanna see some of the actual test questions my sis encountered? Here are just a few examples:Reading:According to the passage, which of the following is NOT a benefit of increased urban farming?A) Reduced pollution from transporting foods long distancesB) More employment opportunities for city residentsC) Lowered rates of dietary health issues like obesityD) Elimination of need for rural agricultural areasListening:What does the professor imply is the primary cause of the gender wage gap?A) Discrimination in hiring practicesB) Women taking timeofffrom careers to raise childrenC) Differences in the college majors men and womenchooseD) Variations in the average number of hours men and women workWriting (Email Prompt):You recently hired an English tutor to help improve your speaking and writing abilities. However, after a few sessions you have been dissatisfied with the quality of instruction. Write an email to the tutoring company expressing your complaints and requesting either a differenttutor or a refund.Speaking (Opinion Prompt):Some people believe that mobilephone use should be completely prohibited while operating a vehicle, as it is a significant safety risk and modern hands-free options are still too distracting. Others argue that hands-free calling and voicecontrol software make phone use safe if done responsibly. What is your opinion on this issue? Explain your position using logical reasoning and examples.Answers:Reading: D) Elimination of need for rural agricultural areasListening: C) Differences in the college majors men and women chooseWriting: Reader's choice - well-organized email with appropriate format, content, and polite toneSpeaking: Reader's choice - coherent response with clear opinion, developed reasoning, relevant examples, good structureWhew! As you can see, it was a verrrrry thorough and challenging test for my poor sister. Kudos to anyone who can pass this beast! Math, coding, and Chinese sections too? No thanks, I'll stick to 4th grade homework for now! Let me know if you all have any other questions!篇2My Big English Test Adventure!Hi there! My name is Li Ming and I'm in 5th grade. I just took a really big English test called the 2023 Shaanxi Province English Proficiency Test for academic credential holders. It was super hard but also kinda fun! Let me tell you all about my big adventure with this test.First off, I had to study a whole bunch to get ready. My English teacher Miss Zhang made us practice listening, reading,writing, speaking - you name it! She said this test was going to be really important for kids like me who want to go to a good university later on. I didn't really get why at first, but my mom and dad kept telling me how critical English is these days. "Work hard on your English, Ming Ming," they'd say. "It will open up so many opportunities for you!"So I buckled down and hit the books...or I guess I should say I hit the English practice tests! We did listening exercises where we had to pick out key details from conversations. The reading passages were pretty dense for a 10-year-old, let me tell you. Writing was maybe the hardest part - I had to write a whole essay just like this one for the test! Can you believe it? Speaking was fun though. We got to have mock conversations and describe pictures out loud. Piece of cake for a chatty kid like me!Test day finally came and I was sooo nervous. We all had to get to the testing center super early in the morning. It was in this huge auditorium at the university near my house. My palms were sweating as the proctor passed out the test booklets. "Don't be scared, Ming Ming," Miss Zhang whispered before we started. "Just do your best!"The listening section kicked things off. I had to listen really carefully to some conversations between people and answermultiple choice questions about what they said. Like I mentioned, listening practice helped a ton to get me ready for that part.Next up was the reading section which totally drained my brain. I had to power through several long passages on all kinds of topics - science, history, literature, you name it. The questions got progressively harder too, asking for main ideas, making inferences, defining tricky vocabulary words. I just tried my best and filled in the bubbles.Writing time rolled around after that. We had two prompts to choose from - one was telling a story based on a picture and the other was giving our opinion on something. I went with the opinion essay and wrote my little 5th grade heart out about how kids my age should get less homework. A girl can dream, right?Last but not least was the speaking section. One by one, we had to go in another room and have a recorded conversation with a test grader. They asked me to describe a scene from a picture, which was explaining some steps in a process (making paper airplanes if I remember right). Definitely one of the easier parts for a motor mouth like yours truly.Whew, I was pooped after that whole shebang! The test took practically all day. Miss Zhang said she was proud of us no matter what though. I really hoped I did well, just so all the hardwork paid off, you know? My parents took me out for pizza that night to celebrate being done.A few weeks went by before the results finally came out. I'll never forget the day Miss Zhang passed back the test reports in class. I was shaking as I opened the envelope with my scores...AND I PASSED! I got high enough marks to be eligible for academic credential programs. A huge weight lifted off my shoulders.My parents were over the moon, too. All those late nights and practice tests were worth it. "We always knew you could do it, Ming Ming!" my dad exclaimed as he swept me up in a bear hug. Miss Zhang beamed and said she couldn't wait to help me prepare for the academic credential exams down the road.So that's the whole story of my big English test experience. It was hard work, but also kinda fun in a way. An adventure for sure!I know I've still got a long road of English learning ahead, but this test makes me feel ready to take it on. The sky's the limit, right? Well, I'm off to keep studying...gotta stay on top of my English game! Thanks for reading, friends!篇3The Biggest Test Ever!Hi there! My name is Lily and I'm 10 years old. I'm in the 5th grade at Sunshine Elementary School in Xi'an, Shaanxi Province. Today I want to tell you all about the super important English test that happened in my province this year - the 2023 Shaanxi Academic Examination for upgrading from junior college to undergraduate! It was a really big deal.Even though I'm just a kid and still in elementary school, I heard a lot about this test from my parents, teachers, and even on TV. They said it was one of the biggest and most challenging English tests in all of China for students trying to go from a junior college degree to a full bachelor's degree at a university. Thousands and thousands of students took it across Shaanxi hoping to get a high enough score to upgrade their education. Can you imagine how nervous they must have been?From what I could understand, the test had a few different sections including listening, reading, writing, translation, and using language points correctly. My mom said the listening section was super hard because they had to understand recordings with different accents and background noises. The reading section used really long academic passages too. I can't even imagine trying to understand all those big words and ideas!If I had to take a test like that, my little brain would probably explode.For the writing part, the students had to write a whole essay in English on a serious topic given to them during the test. My dad told me one of the essay prompts was about sustainable urban development and how to make cities more environmentally friendly. He said you really had to know a ton of vocabulary words related to the environment, urban planning, and policy to write a good essay. Those words are so advanced that they make my tongue twist into a knot just trying to say them! How are regular people supposed to know all that??Then there was the translation section where the test takers had to translate complex paragraphs perfectly between English and Chinese. My parents said this section is a huge challenge because you have to really understand the grammar, context, and connotations of both languages flawlessly. One small misunderstanding or mistake and the whole meaning could get messed up. No pressure though, right?The language points section covered all the tiny details and irregular cases in English grammar, like subjunctive moods or conditional perfect tenses. I've never even heard of things like that before! My English teacher Ms. Roberts says grammar isimportant, but some of the rules on this test sounded harder than ancient Chinese philosophy. I'm just a kid trying to remember basic sentence structures and when to use "a" or "the"!Phew, I'm getting tired just talking about all the difficult parts of this test. How in the world did those students prepare for something so incredibly challenging? My parents said many of them took monthly practice tests for over a year. They read practice materials every day, attended lectures, hired personal tutors, and pretty much dedicated their whole life to this one exam. Can you believe that? Even I don't study that much for my spelling quizzes!The test was held on April 15th across different rooms and buildings in Xi'an. Apparently the locations were so secure with monitoring systems that nobody could cheat in any way. I've been to some of the test buildings before for other events and they looked like hardcore military bases, not schools! The exam lasted over 3 hours too. I can hardly sit still for my 1-hour math tests without getting antsy.A few weeks later, the incredible scores and answer keys were finally released online and on TV. The reading passages covered topics like international business law (huh??), surgicalrobotics (are robots going to operate on me some day?), and archaeological discoveries of ancient Mayan cities (cavaliers and mayonnaise cities??). I definitely wouldn't have understood any of those readings!The sample essay answers looked like they were written by world-famous university professors or something. The words and sentences were so perfect and intelligent. My attempts at writing usually involve a lot of erasing, crossed-out words, and doodles in the margins. I have a hard time even filling up one page, never mind writing a multi-page masterpiece about urban environmental policies!From what I saw, pretty much everything about this exam was way too hard for a little kid like me. The listening, reading, writing, translation, grammar…I'm just not cut out for testing at that level. At least not yet! I've got a long way to go before I can even dream of passing an exam like that. The junior college students who took it must be super brave and smart. I was really impressed learning all about it.In the end, only the top scoring students were allowed to upgrade their junior college diplomas to bachelor's degrees from universities. It's crazy how one single test on one single day could completely change the course of someone's education andfuture career! If I ever have to take a terrifying high-stakes test like that when I'm older, I'll definitely be spending a lot more time studying than playing video games. This 2023 Shaanxi exam was no joke!Well, that's all I've got to say about the biggest English test of the year here in Shaanxi Province. Even though it went way over my head as a fifth grader, I tried my best to understand and explain it to you all. I have a brand new respect for any student who could ace that incredibly difficult exam. If you ever find yourself getting nervous about a spelling quiz or math test, just remember how much harder the 2023 Shaanxi Academic Exam was! We're pretty lucky we don't have anything that intense to deal with as elementary schoolers. I'm going to go appreciate how easy my life is by playing outside and eating ice cream. Thanks for listening!篇4The 2023 Shaanxi English Upgrading Test - A Kid's ViewHi friends! My name is Little Wang and I'm going to tell you all about the big English test I had to take last month. It was called the 2023 Shaanxi Province English Test for Upgradingfrom Junior College to Undergraduate. That's a really long name! I'll just call it the Upgrading Test.The Upgrading Test was really hard. There were listening, reading, writing, and translation sections. I had to sit at a desk for four whole hours! My little legs were getting tired from all that sitting.The listening part was first. I put on my headphones and the nice lady's voice came on telling me to listen carefully. There were conversations between two people and I had to choose the right answer about what they said. Some of the conversations were about going shopping or making plans. Other conversations were news reports about things happening in Shaanxi Province. I tried really hard to listen but it was tough!After listening, we did the reading section. There were longer passages to read about science, history, culture, and lots of other topics. I liked the passage about the Terra Cotta Warriors best because I learned about that on a field trip last year. But some of the other reading passages used words I didn't know and had difficult sentences to understand.Once we finished the terribly long reading section, it was time for writing. We had to write a short essay of 100-120 words on a randomly assigned topic. The topic I got was "The Benefitsof Learning English." I wrote about how learning English can help me make friends around the world and travel to different countries one day. I bet my writing looks like chicken scratch though!The very last section was translation. We had to translate sentences from English into Chinese and from Chinese back into English. Some of the vocabulary was really advanced for a kid like me. I tried my best but I'm sure I made quite a few mistakes. Translating is just so hard!Finally, after what felt like an entire day, the Upgrading Test was over. My hand was sore from all that writing and reading. My brain was fried from trying to focus for so long. I really hoped I did okay.A few weeks later, our teacher posted the Upgrading Test answers for our class. I hurried to check my work. Here are some of the questions and answers from the different sections:Listening SectionQuestion: What did the man say about the restaurant?A) The food was delicious.B) The service was slow.C) It was too expensive.D) The location was inconvenient.Answer: BReading SectionAccording to the passage, which of the following regions in China is known for producing high quality silk?A) GuangdongB) ShaanxiC) ZhejiangD) YunnanAnswer: CWriting Section[Example Essay Question] The Benefits of Learning EnglishLearning English provides many important benefits. First, it allows communication with people from different countries and cultures. Second, studying English can help create job opportunities both locally and globally. English skills make an individual more competitive in the career marketplace. Finally, learning English expands one's understanding of the world byproviding access to books, movies, websites and other resources produced in the English language. Overall, learning English is extremely advantageous in our interconnected world.Translation SectionTranslate the following sentence into Chinese:The ancient capital city of Xi'an is home to the famous Terracotta Warriors.西安这座古都是著名的兵马俑的所在地。
英语幽默笑话句子
英语幽默笑话句子1. Why did the scarecrow win an award? Because he was outstanding in his field.2. Why don't scientists trust atoms? Because they make up everything!3. Why don't skeletons fight? They don't have the guts.4. I used to play piano by ear, but now I use my hands.5. Why did the bicycle fall over? It was two-tired.6. I'm reading a book about anti-gravity. It's impossible to put down!7. What do you call fake spaghetti? An impasta.8. Why don't eggs tell jokes? They might crack up!9. What do you call a bear with no teeth? A gummy bear.10. Why don't scientists trust atoms? Because they make up everything!11. How do you organize a space party? You "planet"!12. Why did the tomato turn red? Because it saw the salad dressing.13. What did the big flower say to the little flower? "Hi, bud!"14. I used to be a baker, but I couldn't make enough dough.15. How does a penguin build its house? Igloos it together!16. Why don't skeletons fight? They don't have the guts.17. What do you get when you cross a snowman and a vampire? Frostbite.18. What do you call a bear with no teeth? A gummy bear.19. Why did the scarecrow win an award? Because he was outstanding in his field.20. How does a penguin build its house? Igloos it together!21. I don't trust stairs. They're always up to something.22. What do you call fake spaghetti? An impasta.23. What do you call a fish with no eyes? Fsh.24. Why did the stadium get hot after the game? Because all the fans left.25. Why did the coffee file a police report? It got mugged!26. Why did the cookie go to the doctor? It was feeling crumby.27. What do you call a snobbish criminal going downstairs? A condescending con descending.28. Why did the math book look sad? Because it had too many problems.29. How do you catch a squirrel? Climb a tree and act like a nut!30. Why don't eggs tell jokes? They might crack up!31. What do you call a snowman with a six-pack? An abdominal snowman.32. What did the grape say when it got stepped on? Nothing, it just let out a little wine.33. Why don't scientists trust atoms? Because they make up everything!34. Why don't skeletons fight? They don't have the guts.35. How do you fix a broken tomato? Tomato paste.36. Why did the bicycle fall over? It was two-tired.37. What did one wall say to the other? "I'll meet you at the corner."38. What do you call a bear with no teeth? A gummy bear.39. How does a penguin build its house? Igloos it together!40. Why did the scarecrow win an award? Because he was outstanding in his field.41. I'm reading a book about anti-gravity. It's impossible to put down!42. What do cows do for fun? They go to the moooo-vies.43. Why don't eggs tell jokes? They might crack up!44. I used to play piano by ear, but now I use my hands.45. How do you organize a space party? You "planet"!46. What did the big flower say to the little flower? "Hi, bud!"47. Why don't ants get sick? Because they have little anty-bodies.48. What do you get if you cross a snowman and a vampire? Frostbite.49. Why don't eggs tell jokes? They might crack up!50. How does a penguin build its house? Igloos it together!总结：以上提供了50个英语幽默笑话句子，希望能给你带来一些欢乐和轻松的时刻。
第11讲 题型专练：阅读七选五15篇(解析版)七年级英语上册
第11讲题型专练：阅读七选五15篇对应七上牛津译林2024各单元话题一、答题技巧：1、答题前应先速读全文，理解文章主旨和文章框架。
切忌边看文章边作答。
2、作答时应先细读每个选项,注意填的选项与上下文语义是否衔接、逻辑是否连贯。
3、每选择一个选项，都要确保其他选项均不能填入该空格处。
4、作答完成后，还应再次通读全文,检查填的选项是否正确。
二、解题策略1.根据空格位置解题。
(1)当空格设在段首时,最可能存在以下两种情形:一是空格处可能是段落主题句。
此时，考生应仔细阅读段落内容,选择与段落大意一致的选项。
二是空格处可能是过渡句，起承上启下的作用。
这种情况下，考生需要瞻前顾后，即阅读上一段结尾部分及空格后面内容，寻找能将前后内容衔接起来的过渡句。
(2)当空格设在段中时，空格处多应填入过渡性句子或细节句。
这种情况下，空格处往往与上下文存在某种语义逻辑关系，如转折关系、因果关系、递进关系。
这时应仔细阅读前后句子，根据文中关键词，在备选项中寻找语义、逻辑与之关联的选项。
(3)当空格设在段尾时，空格处通常是为概括性的结论，这时应注意查找包含结论、总结的选项，如therefore、as a result、so等表达。
2.根据逻辑线索解题。
语篇是连贯的，换言之,语篇之所以不是一堆散乱的语言片段，是因为组成语篇的各部分(段落、句子、短语等)之间具有一定的逻辑语义关系。
语篇中的各种逻辑关系通过一些标志词体现，牢牢抓住这些逻辑关系词，问题往往可迎刃而解。
以下是一-些逻辑关系的标志词:(1)转折让步关系:but、yet、however、although、instead、though、while、whereas despite等。
(2)并列递进关系:and、or、also、besides、even 、similarly、in the same way、meanwhile、furthermore、moreover等。
(3)因果关系:therefore、thus、as a result、for this reason 、of course等。
学而思夯基宝英语篇
学而思夯基宝英语篇Han Yu EnglishHan Yu is a well-known education brand in China, providing high-quality English learning materials and courses for students of all ages. The Han Yu English series is designed to help students improve their English skills in a fun and engaging way. The series covers a wide range of topics, from basic grammar and vocabulary to more advanced reading and writing skills. With its interactive and comprehensive approach, Han Yu English has become a popular choice for English learners in China.The Han Yu English series includes a variety of learning materials, such as textbooks, workbooks, and audio-visual resources. These materials are carefully designed to meet the needs of different learning styles and abilities. The textbooks are structured to gradually build students' language proficiency, while the workbooks offer plenty of exercises and activities to reinforce the learning. The audio-visual resources, including videos and interactive games, provide an immersive learning experience that is both enjoyable and effective.One of the key features of Han Yu English is its focus on real-life communication. The series emphasizes practical language use in everyday situations, helping students to develop their speaking and listening skills in a natural way. By using authentic language and contextualized activities, Han Yu English enables students to apply what they have learned to real-life communication, making the learning process more meaningful and effective.In addition to its comprehensive learning materials, Han Yu English also offers a range of courses and programs to support students' English learning journey. These include online courses, tutoring services, and study abroad programs, all designed to provide students with personalized and effective learning experiences. The courses are taught by experienced and qualified English teachers, who use innovative teaching methods to engage students and help them achieve their language learning goals.Overall, Han Yu English is a trusted and effective resource for English learners in China. With its high-quality materials, interactive learning approach, andpersonalized support, Han Yu English has helped countless students improve their English skills and achieve their language learning goals.汉语英语篇汉语是中国著名的教育品牌，为各个年龄段的学生提供高质量的英语学习材料和课程。
MIT-SCIENCE-Lectures-handout_16_
2024-2025学年冀教版小升初英语试卷与参考答案
2024-2025学年冀教版英语小升初自测试卷与参考答案一、听力部分（本大题有12小题，每小题2分，共24分）1、What is the weather like today?A. It’s sunny.B. It’s cloudy.C. It’s rainy.Answer: AExplanation: The question asks about the weather today. The correct answer is “It’s sunny,” which is option A. The other options, B. It’s cloudy and C. It’s rainy, do not match the given information.2、How old is the student who is talking about his favorite sport?A. 12 years old.B. 14 years old.C. 10 years old.Answer: BExplanation: The student is talking about his favorite sport, and the question asks for his age. The correct answer is “14 years old,” which is option B. The other options, A. 12 years old and C. 10 years old, are not mentioned inthe conversation.3、What are the speakers talking about in this conversation?A. The weather forecast for the next week.B. The school trip planned for next month.C. The latest sports news.Answer: BExplanation: The conversation focuses on discussing the school trip that is scheduled to take place next month, which indicates that the topic is related to school activities and not weather or sports news.4、Listen to the dialogue and answer the question.How does the man feel about the new book?A. ExcitedB. BoredC. DisappointedAnswer: AExplanation: In the dialogue, the man expresses his enthusiasm and excitement about the new book he just received, suggesting that he is looking forward to reading it.5.Listen to the conversation between two students, Tom and Lily, talking about their weekend plans. Then answer the question.Question: What does Tom plan to do on Saturday afternoon?A. He will go to the library.B. He will visit his grandparents.C. He will go shopping with Lily.Answer: BExplanation: In the conversation, Tom says, “I’m going to visit my grandparents on Saturday afternoon.” Therefore, the correct answer is B.6.Listen to the following dialogue between a teacher and a student abouta school project. After listening, choose the correct answer to the following question.Question: What is the student’s main concern about the project?A. He is not sure about the deadline.B. He needs help with the research.C. He is worried about the difficulty of the topic.Answer: BExplanation: The student says, “I’m a bit confused abou t the research part of the project. Can you help me find some sources?” This indicates that the student’s main concern is about the research part, making answer B the correct choice.7.What does the speaker usually do in the morning?A. Watch TV.B. Read a book.C. Do exercise.D. Cook breakfast.Answer: CExplanation: The speaker mentions that every morning, they go to the park for a run, which indicates they do exercise.8.Which of the following is NOT mentioned as a hobby of the speaker?A. Painting.B. Singing.C. Writing.D. Cooking.Answer: DExplanation: The speaker talks about painting, singing, and writing as their hobbies, but does not mention cooking.9.You are listening to a conversation between two students, Alice and Bob, discussing their favorite subject in school.Student A: “I think my favorite subject is definitely History. It’s so interesting to learn about different cultures and time periods.”Student B: “I agree, History is fascinating. But I actually prefer Science. It’s amazing how much we can learn about the world around us.”Question: What subject does Bob prefer?A. HistoryB. ScienceC. EnglishD. MathAnswer: B. ScienceExplanation: Bob states that he prefers Science, indicating that his favorite subject is Science, not History, as mentioned by Student A.10.Listen to a short dialogue between a teacher and a student about homework.Teacher: “Hello, John. How was your homework assignment for today?”Student: “It was okay, Mrs.Smith. I think I did well on the math problems, but I’m not sure about the English essay.”Question: What subject is the student having difficulty with?A. MathB. EnglishC. ScienceD. HistoryAnswer: B. EnglishExplanation: The student explicitly mentions that they are not sure about the English essay, indicating that they are struggling with the English subject.11.How old is Tom?A. He is ten years old.B. He is eleven years old.C. He is twelve years old.D. He is thirteen years old.Answer: BExplanation: The question asks for Tom’s age. The correct answer is “He iseleven years old,” which is option B.12.What is the weather like today?A. It is sunny.B. It is rainy.C. It is windy.D. It is snowy.Answer: BExplanation: The question asks about the current weather condition. The correct answer is “It is rainy,” which is option B.二、选择题（本大题有12小题，每小题2分，共24分）1、What is the main purpose of the following sentence in a text?A. To provide a factB. To persuade the readerC. To summarize the textD. To introduce a new characterAnswer: B. To persuade the readerExplanation: The purpose of a sentence in a text can often be determined by its context and the overall message the author is trying to convey. If the sentence is used to influence the reader’s opinion or actions, it is likely intended to persuade.2、Choose the correct word to complete the sentence:The book___________on the table is the one I borrowed from the library.A. lyingB. laidC. liesD. layAnswer: A. lyingExplanation: The correct form of the verb to use here is the present continuous tense, which describes an action happening at the moment of speaking. “Lying” is the gerund form of the verb “lie,” which is used here to describe the action of the book being on the table at the present moment.3、What does the sentence “The cat is sleeping on the mat” mean in English?A)The dog is sleeping on the rug.B)The bird is singing on the tree.C)The mouse is running under the bed.D)The cat is sleeping on the mat.Answer: DExplanation: The correct answer is D because the sentence is a direct translation of the question into English. The other options are either in the wrong tense, incorrect subject, or describe a different scenario.4、Choose the correct word to complete the sentence:She_______her homework last night.A)didB)doesC)doD)is doingAnswer: AExplanation: The correct answer is A) did. The sentence is in the past tense, indicating that the action of doing homework happened in the past. The other options are either in the present tense or not suitable for completing the sentence in the past tense context.5.Choose the correct word to complete the sentence.If it rains tomorrow, we will cancel the picnic.A. shouldB. couldC. wouldD. mightAnswer: C. wouldExplanation: The sentence is talking about a conditional situation that is not yet certain. “Would” is used to express a future action that is dependent on a present condition.6.Select the sentence that has the correct use of the past tense.A. She goes to the store every weekend.B. He had finished his homework by 6 PM yesterday.C. They were eating ice cream at the park.D. We are playing soccer now.Answer: B. He had finished his homework by 6 PM yesterday.Explanation: The past tense is used to describe actions that happened in the past. “Had finished” is the correct past perfect tense form, indicating that the action of finishing the homework was completed before another past action (6 PM yesterday). The other options use present tense or present continuous tense, which are not appropriate for past events.7.Choose the correct word to complete the sentence:The cat is very___________and always keeps the house clean.A)dirtyB)cleverC)lazyD)noisyAnswer: B) cleverExplanation: The sentence implies that the cat has a specific trait that helps it keep the house clean. Among the options, “clever” is the word that best fits this context, suggesting that the cat’s intelligence is part of why it keeps the house tidy.8.Select the word that does not belong in the following list:a) appleb) bananac) graped) carAnswer: D) carExplanation: The list contains fruits (apple, banana, grape), which are alltypes of produce. The word “car” is an object and not a fruit, making it the word that does not belong in the list.9.Which of the following sentences has the correct use of the past tense?A. She went to the store yesterday.B. She goes to the store yesterday.C. She is going to the store yesterday.D. She will go to the store yesterday.Answer: AExplanation: The correct use of the past tense in English is to indicate an action that has already been completed. Option A correctly uses the past tense with the verb “went” to describe an action that occurred in the past. Options B, C, and D all contain errors: B uses the present tense “goes,” C uses the present continuous tense “is going,” and D uses the future tense “will go,” which are not appropriate for describing past actions.10.Choose the word that best completes the sentence.The cat is_______on the windowsill.A. layingB. lainC. lieD. layingAnswer: AExplanation: The correct verb form to complete the sentence is the presentparticiple “laying,” which is used to describe an ongoing action in the present. Option A “laying” is the correct choice. Option B “lain” is the past participle and would be used for perfect tenses, not for the present continuous. Option C “lie” is the base form of the verb and would not be appropriate in this context. Option D “laying” is a misspelling of the correct answer, “lying,” which is the present participle of “lie” and would also be correct but not as precise as “laying” for the context of the sentence.11.Choose the correct answer to complete the sentence.The teacher asked us to write a composition about our favorite __________.A. bookB. movieC. placeD. personAnswer: BExplanation: The correct answer is “movie” because the sentence is asking about a composition about one’s favorite activity or thing, and “movie” fits this context best. The other options do not make as much sense in the context of writing a composition about one’s preferences.12.Select the word that is different from the rest.A. excitingB. interestingC. boringAnswer: CExplanation: The word “boring” is diff erent from the rest because it has a negative connotation, while “exciting,” “interesting,” and “humorous” are all positive adjectives describing the level of enjoyment or interest in something.三、完型填空（10分）Section 3: Cloze TestRead the following passage and choose the best word for each blank from the options given. There is one extra option which does not fit in the context.John was a curious boy who loved to learn about new things. Every weekend, he would visit the local library and borrow books on a variety of subjects. One day, he came across a book about space exploration. It was filled with fascinating facts and pictures of distant planets.1.John was always________ about learning new things.A. interestedB. happyC. excitedD. curious2.He would go to the library and________ books on different topics.A. readC. returnD. find3.The book on space exploration was________ to him.A. boringB. fascinatingC. confusingD. overwhelming4.John was amazed by the pictures of distant planets in the book.A. He was not surprised.B. He found them quite interesting.C. He thought they were not real.D. He was disappointed by them.5.John decided to________ more about space exploration.A. learnB. forgetC. stopD. ignoreAnswers:1.D2.B3.B4.B5.A四、阅读理解（26分）Reading ComprehensionPassage:It was a sunny morning in the small town of Ji. The children were excited because they were going to have their primary school graduation exams. The exams were important because they would determine which high school they could attend.Li Ming was a very bright student. He had been studying very hard for the past few months. He knew that if he did well on the exams, he would have a good chance of getting into a top high school. His parents were very proud of him and encouraged him every day.The day of the exams finally arrived. Li Ming woke up early and had a healthy breakfast. He reviewed his notes one last time before heading to the school. He felt confident and ready to face the challenges ahead.The exam room was filled with students. Everyone was nervous but determined. The teacher distributed the papers, and the exam began. Li Ming worked diligently, answering each question carefully. He finished the test in record time and felt satisfied with his performance.After the exam, Li Ming and his friends gathered outside the school. They were all relieved that it was over. They looked forward to celebrating theirgraduation soon.Questions:1.Why were the children excited on the day of the exams?A. They were going to have a holiday.B. They were going to have a graduation party.C. They were going to attend their primary school graduation exams.D. They were going to receive their report cards.2.What did Li Ming’s parents do to encourage him?A. They scolded him for not studying hard.B. They took him to a movie.C. They bought him a new toy.D. They encouraged him every day.3.How did Li Ming feel after finishing the exam?A. He was disappointed.B. He was nervous.C. He was satisfied.D. He was scared.Answers:1.C2.D3.C五、写作题（16分）Title: My Dream School LifeInstructions: Imagine you are entering your ideal middle school. Write a short essay (about 100-120 words) describing your dream school life. Include the following aspects:1.The school environment (e.g., location, buildings, facilities)2.The teaching methods and atmosphere3.Extracurricular activities you would like to participate in4.Your expectations for friendships and personal growthWriting Sample:My Dream School LifeAs I step into the gates of my dream middle school, I am immediately captivated by its serene surroundings. Nestled in a lush green hillside, the school boasts modern yet cozy buildings that seamlessly blend with nature. Inside, state-of-the-art classrooms equipped with smart boards and high-speed internet await, fostering an environment conducive to learning. The library, a haven of knowledge, boasts thousands of books ranging from classic literature to the latest scientific discoveries, all waiting to be explored.The teaching methods here are innovative and student-centered. Teachers encourage critical thinking and creativity, often using project-based learning to engage us in real-world scenarios. Class discussions are vibrant, where every opinion matters, creating an inclusive and inspiring atmosphere. I find joy notjust in acquiring knowledge but also in the process of discovering and innovating.Beyond academics, the school offers a myriad of extracurricular activities that cater to every interest. I am particularly excited about joining the robotics club, where I can hone my skills in programming and teamwork, and perhaps even compete in national competitions. Additionally, I aspire to be part of the environmental club, actively participating in tree planting and recycling initiatives to make our world a better place.In this dream school, I envision forming lifelong friendships with diverse individuals, sharing laughter, and supporting each other through thick and thin. Personal growth is highly valued, and we are encouraged to set and pursue our own go als, whether it’s mastering a new language, excelling in sports, or developing a passion for art. My dream school life is not just about textbooks and exams; it’s a holistic journey of self-discovery, academic excellence, and contributing positively to society.Analysis:The writing sample effectively captures the essence of a dream school life by addressing all the required aspects. It begins with a vivid description of the school’s natural and technological environment, setting a positive tone. The teaching methods and atmosphere are portrayed as dynamic and inclusive, highlighting the importance of critical thinking and creativity. The inclusion of specific extracurricular activities such as robotics and environmental clubsshows a well-rounded interest in personal development and societal contribution. Lastly, the essay concludes with a heartfelt expectation for meaningful friendships and personal growth, reflecting a holistic vision of education. The language used is engaging and imaginative, making the reader feel part of the dream.。
校园英语情景对话：牛顿的苹果树
校园英语情景对话：牛顿的苹果树牛顿的苹果不知道大家有没有听说过?以下是小编给大家整理的关于牛顿的苹果树的校园英语情景对话，希望可以帮到大家H:As a mathematician and physicist, Sir Isaac Newton is one of the foremost scientific intellects of all time.H：作为一位数学家和物理学家，艾萨克?牛顿爵士是有史以来最著名的科学家之一。
R:I can’t agree with you more. And Newton remains influential to scientists, as demonstrated by a 2005 survey of members of Britain's Royal Society.R：我非常同意你的观点。
2005年对英国皇家学会的调査显示，牛顿仍然对现在的科学家有一定的影响。
H:Newton’s study lays the groundwork for most of classical mechanics.In one of his books, Newton described universal gravitation and the three laws of motion which dominated⑦ the physical world for the next three centuries.H:牛顿的研究为经典力学的大部分内容打下了基础。
在他的一本书中，牛顿描述了万有引力和三大运动定律，主宰了接下来三个世纪的物理世界。
R:Speaking of the universal gravitation, do you know how Newton comes up with this law?R：说到万有引力，你知道牛顿是怎么想到这个定律的吗?H:Of course. Newton himself often told the story that he was inspired to formulate his theory of gravitation by watching the fall of an apple from a tree.H:我当然知道。
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Pretérito de verbos regulares
Pregunta a tus compañeros/as conjugando los verbos en el pasado hasta encontrar a una persona que conteste afirmativamente. Escribe su nombre en el cuadro.
B I N G O
comer en un restaurante muy caro
el fin de semana pasado bailar en una
discoteca
recientemente
leer una novela de
misterio
ver una película de
horror
olvidarse de hacer
su tarea
escribir una composición para una clase acostarse muy
tarde en el fin de
semana
contar un secreto a
una persona
tomar una cerveza llegar temprano a
todas tus clases
perder algo recientemente no desayunar esta
mañana
despertarse tarde
ayer
comprar ropa
nueva este año
mudarse a una
casa nueva el año
pasado
conocer a una persona fascinante en el fin de semana salir con sus
amigos
anoche
recibir dinero de su
familia el mes
pasado
empezar un nuevo
trabajo en
septiembre
nacer en mayo de
1975
comprender los episodios oír las noticias
anoche
volver a su casa a
la medianoche ayer
dormirse en una
clase ayer
pensar en sus
problemas ayer
B I N G O
revelar un secreto pensar en tu
familia anoche pasear por el
parque
escribir un poema
de amor
sentirse mal ayer
conocer a una persona importante desayunar
muy bien esta
mañana
nacer en 1977 discutir con tu
compañero(a) de
cuarto
leer un artículo
interesante
ver una buena película ayudar a un amigo ganar la lotería el
año pasado
salir con tus
amigos el viernes
por la noche
descubrir un
secreto
vivir en un
país extranjero (foreign country) prometer
ayudar a una
persona
contar una chiste
(joke) muy
cómico
oír un chisme muy
escandaloso
cenar en un
restaurante muy
elegante
aprender mucho en tus clases el año pasado olvidarse de hacer
su tarea la semana
pasada
salir muy bien en
un examen muy
difícil
estudiar mucho
ayer
comprar una
camisa nueva
la semana pasada。