Unit2 People and Their Jobs同步练习提升版2026-2027学年沪教版五四学制英语九年级上册

**基本信息** 本练习以“职业与工作”为主题，分层设计从基础语法词汇到综合语篇应用，梯度清晰，助力巩固定语从句等核心知识点，培养语言运用与文化理解能力。 **分层设计** |层次|知识覆盖|设计特色| |----|----------|----------| |基础层|定语从句连接词（who/whose/which）、核心词汇（craftsmanship等）|单选（II）、选词填空（III），聚焦单一知识点辨析与应用| |进阶层|语法情境运用、简单语篇理解|补全对话（IV）需用特殊疑问句/定语从句，阅读A/B（V-A/B）理解职业故事与价值观| |应用层|综合语篇分析、翻译与写作|阅读C/D（V-C/D）探讨职业趋势与传统工艺，翻译（VI）要求用定语从句，写作（VII）阐述工作意义，融合语言能力与文化意识|

九年级英语(上)同步练习 Unit 2 People and Their Jobs 提升版 . 参考答案与解析 Part II Grammar and Vocabulary II. Choose the best answer. (10分) In ancient China, there was a famous craftsman _______(1) name was Lu Ban. He created many tools _______(2) are still used by builders today. A craftsman is a person _______(3) makes things with great skill and care. The spirit of craftsmanship, _______(4) means taking pride in one's work, is something _______(5) everyone can learn from. ( )1. A. who B. whose C. which [答案] 1. B ( )2. A. who B. whom C. which [答案] 2. C ( )3. A. who B. which C. whose [答案] 3. A ( )4. A. who B. which C. whom [答案] 4. B ( )5. A. who B. which C. whose [答案] 5. B Many people today choose careers _______(6) allow them to make a difference. An emergency doctor is a medical professional _______(7) works in critical situations. This is a job _______(8) requires quick thinking and courage. There are also people _______(9) work behind the scenes, like the scientists _______(10) research helps cure diseases. ( )6. A. who B. whose C. which [答案] 6. C ( )7. A. who B. which C. whom [答案] 7. A ( )8. A. who B. which C. whose [答案] 8. B ( )9. A. which B. whom C. who [答案] 9. C ( )10. A. who B. which C. whose [答案] 10. C III. Choose the proper words in the box to complete the passage. (5分) A. craftsmanship B. digitalisation C. race against time D. take up E. pass down F. educational background The spirit of _______(11) is about taking pride in every detail of your work, a quality that is becoming increasingly rare in today's fast-paced world. In many traditional industries, skills and techniques are _______(12) from master to apprentice, often over many years of dedicated practice. In a hospital emergency room, doctors and nurses constantly _______(13) to save their patients' lives, making critical decisions in seconds. With the rapid development of _______(14), many traditional jobs are being transformed, and employees now need to acquire technological skills to keep up. A strong _______(15) can certainly open doors, but it is passion and willingness to learn that truly determine success in the modern workplace. 答案: 11. A (craftsmanship) 12. E (pass down) 13. C (race against time) 14. B (digitalisation) 15. F (educational background) IV. Complete the dialogue as required. (10分) Interviewer: Today we are talking to Mr Chen, a book restorer. Mr Chen, welcome! Mr Chen: Thank you. It is a pleasure to be here. Interviewer: _______(16) ? (用特殊疑问句问他为什么选择这份工作) Mr Chen: I have always loved books. To me, each book is a treasure. Interviewer: That is beautiful. _______(17) ? (用一般疑问句问工作是否困难) Mr Chen: Yes, it requires a lot of patience and attention to detail. Interviewer: _______(18) ! (用感叹句表达敬佩) What is the hardest part? Mr Chen: The hardest part is when a book is too damaged to save. Interviewer: What qualities does a book restorer need? Mr Chen: Someone _______(19) . (用定语从句说明需要什么品质) Interviewer: I see. _______(20) ? (用特殊疑问句问有什么建议给年轻人) Mr Chen: Follow your passion. A job you love is never a job at all. [答案] 16. Why did you choose this job? [答案] 17. Is your job difficult? [答案] 18. How admirable! / That is amazing! [答案] 19. who is patient and has a love for history [答案] 20. What advice do you have for young people? Part III Reading and Writing V. Reading comprehension. (34分) A. Read and choose the best answer. (5分) Host: Welcome to Career Journey, the programme where we explore different professions. Today we are joined by Dr Lin, a wildlife veterinarian who has spent the past fifteen years working in nature reserves across Africa. Dr Lin, welcome. Dr Lin: Thank you. It is wonderful to be here. My journey into this field was not straightforward. I studied general medicine at university, but after volunteering at a wildlife centre during my summer break, I realised this was my true calling. Host: What inspired you to make such a dramatic career change? Dr Lin: I met a lion that had been caught in a trap. The local veterinarians did not have the equipment or knowledge to treat it properly. That experience opened my eyes to how much help was needed. I decided to specialise in wildlife medicine, which meant five more years of training. Host: That is a huge commitment. What challenges do you face in your daily work? Dr Lin: The biggest challenge is the unpredictable nature of the job. I might be doing paperwork in my office one moment, and the next, I am flying to a remote area to treat an injured elephant. You need to be adaptable and calm under pressure. Host: What advice would you give to young people who want to pursue an unusual career? Dr Lin: Follow your curiosity, not your fear. If something interests you, explore it. Even if it does not become your career, the experience will teach you something valuable. 21. What did Dr Lin study at university? A. Wildlife medicine. B. General medicine. C. Veterinary science. D. Environmental science. [答案] 21. B 22. What motivated Dr Lin to switch to wildlife medicine? A. A lecture she attended. B. An experience helping an injured lion. C. A book she read. D. Advice from her professor. [答案] 22. B 23. What does the underlined phrase true calling in Paragraph 1 mean? A. the job that pays the most B. the work one is meant to do C. the career that is easiest D. the job that everyone respects [答案] 23. B 24. What is the biggest challenge Dr Lin faces in her job? A. The low salary. B. The unpredictable nature of the work. C. The long working hours. D. The lack of equipment. [答案] 24. B 25. What advice does Dr Lin give to young people? A. Choose a safe and stable career. B. Follow your curiosity, not your fear. C. Only pursue popular careers. D. Stay in one field for life. [答案] 25. B B. Read and choose the best answer. (5分) 1.In Japan, there is a word that has no direct English translation: ikigai. It means the reason for being or the thing that makes life worth living. According to Japanese culture, everyone has an ikigai, and finding it is the key to a long and happy life. Interestingly, recent research suggests that ikigai is closely connected to our careers. 2.To find your ikigai, you need to answer four questions: What do you love? What are you good at? What does the world need? And what can you be paid for? Your ikigai lies at the intersection of all four. If you find a job that satisfies all these conditions, you have found your ikigai. 3.Many people, however, struggle to find this balance. They may love music but struggle to make a living from it. They may be skilled at accounting but find it boring. In such cases, the Japanese suggest something practical: do not quit your job immediately. Instead, keep your current job while pursuing your passion in your free time until it becomes sustainable. 4.This approach is called parallel careers, and it is becoming increasingly common among young professionals. A person might work as an engineer during the day and run a small baking business on weekends. Over time, the side business may grow enough to become the main career. This reduces the risk of suddenly losing income while still allowing people to pursue their dreams. 5.The concept of ikigai teaches us that the perfect career is not something you find overnight. It is something you discover gradually, through self-reflection and experimentation. As the Japanese say, A journey of a thousand miles begins with a single step. Finding your ikigai is no different. 26. What is ikigai according to the passage? A. A Japanese traditional art form. B. The reason for being or purpose in life. C. A type of Japanese career. D. A Japanese word for retirement. [答案] 26. B 27. What does the writer suggest about finding the perfect job? A. It is about loving your work. B. It lies where passion, skill, need, and income meet. C. It is only about making money. D. It means choosing a job your family approves of. [答案] 27. B 28. What does the underlined word intersection in Paragraph 2 mean? A. the point where things cross or meet B. the area between two roads C. the distance between two places D. the process of choosing [答案] 28. A 29. What is the advantage of parallel careers according to Paragraph 4? A. It guarantees immediate success. B. It reduces the risk of losing income. C. It requires no effort. D. It is only for young people. [答案] 29. B 30. What is the writer's main message in the last paragraph? A. Finding ikigai is quick and easy. B. The perfect career is discovered gradually. C. Only Japanese people can find ikigai. D. Ikigai is not related to careers. [答案] 30. B C. Choose the best answer and complete the passage. (12分) In many parts of the world, the idea of a job for life has become a thing of the past. Young people today are expected to change careers multiple times, and many will work in jobs that do not even exist yet. This new reality _______(31) both opportunities and challenges for the current generation of students. One significant challenge is the skills gap. Many employers complain that university graduates lack the practical skills _______(32) for the modern workplace. While students may have excellent theoretical knowledge, they often struggle with communication, teamwork, and problem-solving in real-world situations. This gap between education and employment is a growing _______(33) in many countries. To bridge this gap, some educational institutions are redesigning their programmes. They are introducing more project-based learning, internship opportunities, and partnerships with local businesses. These initiatives allow students to gain hands-on experience while still studying, making them more _______(34) to employers after graduation. Another important trend is the growing emphasis on soft skills. While technical knowledge can become outdated quickly, soft skills such as adaptability, emotional intelligence, and critical thinking remain _______(35) throughout a person's career. Employers are increasingly looking for candidates who can learn, unlearn, and relearn as the workplace evolves. In conclusion, the future belongs to those who are willing to keep learning and adapting. A degree is no longer a _______(36) of a successful career; it is just the beginning of a lifelong learning journey. ( )31. A. presents B. prevents C. pretends D. prepares [答案] 31. A ( )32. A. acquired B. required C. inspired D. admired [答案] 32. B ( )33. A. solution B. concern C. benefit D. privilege [答案] 33. B ( )34. A. attractive B. active C. anxious D. available [答案] 34. A ( )35. A. valuable B. various C. visible D. voluntary [答案] 35. A ( )36. A. guarantee B. guidance C. growth D. gratitude [答案] 36. A D. Answer the questions. (12分) In a world obsessed with technology and digital innovation, one man has chosen a very different path. Zhang Qisheng, a 62-year-old craftsman from Suzhou, has been making traditional Chinese paper umbrellas for over 40 years. Each umbrella takes him a full week to complete, and he produces no more than 50 umbrellas each year. The process of making a traditional paper umbrella is extremely complex. It involves more than 80 separate steps, from selecting the right bamboo to painting the paper cover by hand. The bamboo must be aged for at least three years before it is strong enough to use. The paper is coated with tung oil to make it waterproof, a technique that has been passed down through generations. But why go through all this trouble when you can buy a cheap factory-made umbrella for 20 yuan? For Mr Zhang, the answer is simple: these umbrellas are not just tools; they are pieces of art that carry centuries of Chinese culture and history. Each one tells a story of the craftsman who made it. Unfortunately, Mr Zhang is one of the last masters of this craft. Young people are not interested in learning it because it takes years to master and does not pay well. Mr Zhang has tried to find apprentices, but most give up after a few months. The work is too slow and requires too much patience for a generation that is used to instant results. Despite these challenges, Mr Zhang continues to make umbrellas every day. He says, I do not make umbrellas for money. I make them because if I stop, this art will disappear forever. Someone has to keep the tradition alive. Task 1: Answer the questions. 37. How long does it take Mr Zhang to make one umbrella? (不超过5词) ______________________________________________________________________________ [答案] 37. One full week. 38. Why must the bamboo be aged for three years? (不超过15词) ______________________________________________________________________________ [答案] 38. So that it is strong enough to use. 39. According to Mr Zhang, what makes his umbrellas different from factory-made ones? (不超过20词) ______________________________________________________________________________ [答案] 39. They are pieces of art that carry centuries of Chinese culture. 40. Why are young people not interested in learning this craft? (不超过20词) ______________________________________________________________________________ [答案] 40. Because it takes years to master and does not pay well. 41. What happens to most of Mr Zhang's apprentices? (不超过15词) ______________________________________________________________________________ [答案] 41. Most give up after a few months. 42. Why does Mr Zhang continue making umbrellas despite the challenges? (不超过20词) ______________________________________________________________________________ ______________________________________________________________________________ [答案] 42. Because if he stops, this traditional art will disappear forever. Task 2: 43. Mr Zhang says someone has to keep the tradition alive. What does this sentence reveal about the relationship between individuals and cultural heritage? Explain in about 30 words. ______________________________________________________________________________ ______________________________________________________________________________ [参考] It shows that cultural heritage depends on individuals who are willing to dedicate their lives to preserving it. Without such people, traditional arts and skills would be lost forever. VI. Translate the following sentences into English. (6分) 44. 书卷修复师是修复旧书的人，这些书历经岁月而受损。 (who, which) ______________________________________________________________________________ [答案] A book restorer is someone who repairs old books which have been damaged over time. 45. 工匠精神是一种品质，它让人们对工作充满自豪。 (which) ______________________________________________________________________________ [答案] Craftsmanship spirit is a quality which makes people take pride in their work. 46. 如果我们找到既符合兴趣又有意义的工作，我们就会更成功。 (which, if) ______________________________________________________________________________ [答案] If we find a job which matches our interests and has meaning, we will be more successful. VII. Writing. (15分) 47. Write at least 80 words about what makes a job worthwhile. Suggested questions: (1) What do you think is important in a job? (2) Would you choose a high-paying job or a job you love? Why? (3) What kind of job do you think is most meaningful? __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ 参考范文: I think a worthwhile job is one that brings satisfaction and makes a difference. Money is important, but it is not everything. If I had to choose between a high-paying job I hate and a lower-paying job I love, I would choose the one I love. When you enjoy your work, you will naturally work harder and achieve more. I believe the most meaningful jobs are those that help others. Doctors who save lives, teachers who educate young minds, and craftsmen who preserve our culture they all make the world a better place. 学科网（北京）股份有限公司 $ 九年级英语(上)同步练习 Unit 2 People and Their Jobs 提升版 Part II Grammar and Vocabulary II. Choose the best answer. (10分) In ancient China, there was a famous craftsman _______(1) name was Lu Ban. He created many tools _______(2) are still used by builders today. A craftsman is a person _______(3) makes things with great skill and care. The spirit of craftsmanship, _______(4) means taking pride in one's work, is something _______(5) everyone can learn from. ( )1. A. who B. whose C. which ( )2. A. who B. whom C. which ( )3. A. who B. which C. whose ( )4. A. who B. which C. whom ( )5. A. who B. which C. whose Many people today choose careers _______(6) allow them to make a difference. An emergency doctor is a medical professional _______(7) works in critical situations. This is a job _______(8) requires quick thinking and courage. There are also people _______(9) work behind the scenes, like the scientists _______(10) research helps cure diseases. ( )6. A. who B. whose C. which ( )7. A. who B. which C. whom ( )8. A. who B. which C. whose ( )9. A. which B. whom C. who ( )10. A. who B. which C. whose III. Choose the proper words in the box to complete the passage. (5分) A. craftsmanship B. digitalisation C. race against time D. take up E. pass down F. educational background The spirit of _______(11) is about taking pride in every detail of your work, a quality that is becoming increasingly rare in today's fast-paced world. In many traditional industries, skills and techniques are _______(12) from master to apprentice, often over many years of dedicated practice. In a hospital emergency room, doctors and nurses constantly _______(13) to save their patients' lives, making critical decisions in seconds. With the rapid development of _______(14), many traditional jobs are being transformed, and employees now need to acquire technological skills to keep up. A strong _______(15) can certainly open doors, but it is passion and willingness to learn that truly determine success in the modern workplace. IV. Complete the dialogue as required. (10分) Interviewer: Today we are talking to Mr Chen, a book restorer. Mr Chen, welcome! Mr Chen: Thank you. It is a pleasure to be here. Interviewer: _______(16) ? (用特殊疑问句问他为什么选择这份工作) Mr Chen: I have always loved books. To me, each book is a treasure. Interviewer: That is beautiful. _______(17) ? (用一般疑问句问工作是否困难) Mr Chen: Yes, it requires a lot of patience and attention to detail. Interviewer: _______(18) ! (用感叹句表达敬佩) What is the hardest part? Mr Chen: The hardest part is when a book is too damaged to save. Interviewer: What qualities does a book restorer need? Mr Chen: Someone _______(19) . (用定语从句说明需要什么品质) Interviewer: I see. _______(20) ? (用特殊疑问句问有什么建议给年轻人) Mr Chen: Follow your passion. A job you love is never a job at all. Part III Reading and Writing V. Reading comprehension. (34分) A. Read and choose the best answer. (5分) Host: Welcome to Career Journey, the programme where we explore different professions. Today we are joined by Dr Lin, a wildlife veterinarian who has spent the past fifteen years working in nature reserves across Africa. Dr Lin, welcome. Dr Lin: Thank you. It is wonderful to be here. My journey into this field was not straightforward. I studied general medicine at university, but after volunteering at a wildlife centre during my summer break, I realised this was my true calling. Host: What inspired you to make such a dramatic career change? Dr Lin: I met a lion that had been caught in a trap. The local veterinarians did not have the equipment or knowledge to treat it properly. That experience opened my eyes to how much help was needed. I decided to specialise in wildlife medicine, which meant five more years of training. Host: That is a huge commitment. What challenges do you face in your daily work? Dr Lin: The biggest challenge is the unpredictable nature of the job. I might be doing paperwork in my office one moment, and the next, I am flying to a remote area to treat an injured elephant. You need to be adaptable and calm under pressure. Host: What advice would you give to young people who want to pursue an unusual career? Dr Lin: Follow your curiosity, not your fear. If something interests you, explore it. Even if it does not become your career, the experience will teach you something valuable. 21. What did Dr Lin study at university? A. Wildlife medicine. B. General medicine. C. Veterinary science. D. Environmental science. 22. What motivated Dr Lin to switch to wildlife medicine? A. A lecture she attended. B. An experience helping an injured lion. C. A book she read. D. Advice from her professor. 23. What does the underlined phrase true calling in Paragraph 1 mean? A. the job that pays the most B. the work one is meant to do C. the career that is easiest D. the job that everyone respects 24. What is the biggest challenge Dr Lin faces in her job? A. The low salary. B. The unpredictable nature of the work. C. The long working hours. D. The lack of equipment. 25. What advice does Dr Lin give to young people? A. Choose a safe and stable career. B. Follow your curiosity, not your fear. C. Only pursue popular careers. D. Stay in one field for life. B. Read and choose the best answer. (5分) 1.In Japan, there is a word that has no direct English translation: ikigai. It means the reason for being or the thing that makes life worth living. According to Japanese culture, everyone has an ikigai, and finding it is the key to a long and happy life. Interestingly, recent research suggests that ikigai is closely connected to our careers. 2.To find your ikigai, you need to answer four questions: What do you love? What are you good at? What does the world need? And what can you be paid for? Your ikigai lies at the intersection of all four. If you find a job that satisfies all these conditions, you have found your ikigai. 3.Many people, however, struggle to find this balance. They may love music but struggle to make a living from it. They may be skilled at accounting but find it boring. In such cases, the Japanese suggest something practical: do not quit your job immediately. Instead, keep your current job while pursuing your passion in your free time until it becomes sustainable. 4.This approach is called parallel careers, and it is becoming increasingly common among young professionals. A person might work as an engineer during the day and run a small baking business on weekends. Over time, the side business may grow enough to become the main career. This reduces the risk of suddenly losing income while still allowing people to pursue their dreams. 5.The concept of ikigai teaches us that the perfect career is not something you find overnight. It is something you discover gradually, through self-reflection and experimentation. As the Japanese say, A journey of a thousand miles begins with a single step. Finding your ikigai is no different. 26. What is ikigai according to the passage? A. A Japanese traditional art form. B. The reason for being or purpose in life. C. A type of Japanese career. D. A Japanese word for retirement. 27. What does the writer suggest about finding the perfect job? A. It is about loving your work. B. It lies where passion, skill, need, and income meet. C. It is only about making money. D. It means choosing a job your family approves of. 28. What does the underlined word intersection in Paragraph 2 mean? A. the point where things cross or meet B. the area between two roads C. the distance between two places D. the process of choosing 29. What is the advantage of parallel careers according to Paragraph 4? A. It guarantees immediate success. B. It reduces the risk of losing income. C. It requires no effort. D. It is only for young people. 30. What is the writer's main message in the last paragraph? A. Finding ikigai is quick and easy. B. The perfect career is discovered gradually. C. Only Japanese people can find ikigai. D. Ikigai is not related to careers. C. Choose the best answer and complete the passage. (12分) In many parts of the world, the idea of a job for life has become a thing of the past. Young people today are expected to change careers multiple times, and many will work in jobs that do not even exist yet. This new reality _______(31) both opportunities and challenges for the current generation of students. One significant challenge is the skills gap. Many employers complain that university graduates lack the practical skills _______(32) for the modern workplace. While students may have excellent theoretical knowledge, they often struggle with communication, teamwork, and problem-solving in real-world situations. This gap between education and employment is a growing _______(33) in many countries. To bridge this gap, some educational institutions are redesigning their programmes. They are introducing more project-based learning, internship opportunities, and partnerships with local businesses. These initiatives allow students to gain hands-on experience while still studying, making them more _______(34) to employers after graduation. Another important trend is the growing emphasis on soft skills. While technical knowledge can become outdated quickly, soft skills such as adaptability, emotional intelligence, and critical thinking remain _______(35) throughout a person's career. Employers are increasingly looking for candidates who can learn, unlearn, and relearn as the workplace evolves. In conclusion, the future belongs to those who are willing to keep learning and adapting. A degree is no longer a _______(36) of a successful career; it is just the beginning of a lifelong learning journey. ( )31. A. presents B. prevents C. pretends D. prepares ( )32. A. acquired B. required C. inspired D. admired ( )33. A. solution B. concern C. benefit D. privilege ( )34. A. attractive B. active C. anxious D. available ( )35. A. valuable B. various C. visible D. voluntary ( )36. A. guarantee B. guidance C. growth D. gratitude D. Answer the questions. (12分) In a world obsessed with technology and digital innovation, one man has chosen a very different path. Zhang Qisheng, a 62-year-old craftsman from Suzhou, has been making traditional Chinese paper umbrellas for over 40 years. Each umbrella takes him a full week to complete, and he produces no more than 50 umbrellas each year. The process of making a traditional paper umbrella is extremely complex. It involves more than 80 separate steps, from selecting the right bamboo to painting the paper cover by hand. The bamboo must be aged for at least three years before it is strong enough to use. The paper is coated with tung oil to make it waterproof, a technique that has been passed down through generations. But why go through all this trouble when you can buy a cheap factory-made umbrella for 20 yuan? For Mr Zhang, the answer is simple: these umbrellas are not just tools; they are pieces of art that carry centuries of Chinese culture and history. Each one tells a story of the craftsman who made it. Unfortunately, Mr Zhang is one of the last masters of this craft. Young people are not interested in learning it because it takes years to master and does not pay well. Mr Zhang has tried to find apprentices, but most give up after a few months. The work is too slow and requires too much patience for a generation that is used to instant results. Despite these challenges, Mr Zhang continues to make umbrellas every day. He says, I do not make umbrellas for money. I make them because if I stop, this art will disappear forever. Someone has to keep the tradition alive. Task 1: Answer the questions. 37. How long does it take Mr Zhang to make one umbrella? (不超过5词) ______________________________________________________________________________ 38. Why must the bamboo be aged for three years? (不超过15词) ______________________________________________________________________________ 39. According to Mr Zhang, what makes his umbrellas different from factory-made ones? (不超过20词) ______________________________________________________________________________ 40. Why are young people not interested in learning this craft? (不超过20词) ______________________________________________________________________________ 41. What happens to most of Mr Zhang's apprentices? (不超过15词) ______________________________________________________________________________ 42. Why does Mr Zhang continue making umbrellas despite the challenges? (不超过20词) ______________________________________________________________________________ ______________________________________________________________________________ Task 2: 43. Mr Zhang says someone has to keep the tradition alive. What does this sentence reveal about the relationship between individuals and cultural heritage? Explain in about 30 words. ______________________________________________________________________________ ______________________________________________________________________________ VI. Translate the following sentences into English. (6分) 44. 书卷修复师是修复旧书的人，这些书历经岁月而受损。 (who, which) ______________________________________________________________________________ 45. 工匠精神是一种品质，它让人们对工作充满自豪。 (which) ______________________________________________________________________________ 46. 如果我们找到既符合兴趣又有意义的工作，我们就会更成功。 (which, if) ______________________________________________________________________________ VII. Writing. (15分) 47. Write at least 80 words about what makes a job worthwhile. Suggested questions: (1) What do you think is important in a job? (2) Would you choose a high-paying job or a job you love? Why? (3) What kind of job do you think is most meaningful? __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ __________________________________________________________________________ 学科网（北京）股份有限公司 $