Unit1语法：现在完成时vs一般过去时讲解2026-2027学年人教版九年级英语上册

本初中英语讲义聚焦新人教九上U1核心语法“现在完成时vs一般过去时”，通过对比表格系统梳理两种时态的定义、基本结构、常见标志词及例句，构建从基础概念到应用的学习支架，同时涵盖被动语态转换及非延续性动词与延续性动词转换等易错点解析。 资料以对比辨析为核心设计亮点，通过表格直观呈现语法差异助力学生提升语言理解与表达能力，结合课堂分层练习（如时态填空）和课后综合训练（单句语法填空、语篇填空），培养学生分析比较的思维品质，课中辅助教师高效授课，课后帮助学生巩固知识查漏补缺，提升自主学习能力。

新人教九上单元语法 U1语法：现在完成时vs一般过去时 般过去时 现在完成时 过去某个具体时间发生、且 ①过去发生的动作，对现在有明确 现在已经结束的动作或状 影响； 定义 态，不强调对"现在”的影 ②过去开始的动作，持续到现在还 响。 没结束。 主语+动词过去式(be动词 主语+have/has+动词过去分词(be 基本结构 用was/were,实义动词变过 动词过去分词是been,实义动词变过 去式) 去分词) 表过去的时间：yesterday, 表"影响"（不确定过去时间）：already, last week,two days ago,in yet,ever,just等：表"持续"（从过去 常见标志 2020,this morning等；过去 到现在的时间段)：snce+过去时间 词 的具体场景：when I was 10, 点，for+时间段，recently,in the past 1 ust now。 5 years等。 She went to the park She has already gone to the park.她已 例句 yesterday. 经去公园了。 她昨天去了公园。 注意事项 1.现在完成时和一般过去时的被动语态 现在完成时的被动语态：have/has been done 一般过去时的被动语态：was/were done The house has been built for3 years..这个房子已经被建了三年了。 Beijing opera (introduce)to more people around the world during the 2020 Mei Lanfang Art Festival. 在北京2020年梅兰芳艺术节期间，京剧得以向全球更多观众介绍。 2.现在完成时与表示一段时间的for短语、sice短语或从句等连用时，应注意将 句中的谓语动词转换为延续性动词。常考的非延续性动词与延续性动词之间的转 换：die→be dead,borrow→keep,buy→have,leave-→be away,.begin/start-→beon, finishbe over,.join->be in/be a member of,.come→be here,go→be there等。例如： Jim left his hometown last year.吉姆去年离开了家乡。 →Jim has been away from his hometown for a year.吉姆离开家乡一年了。 课堂练习 1.Linda has lain (lie)in bed for two days because of the cold. 2.AI has made (make)a big difference to the whole world over the past few years. 3.Yesterday we held (hold)a meaningful class meeting on environmental protection 4.My sister has been (be)to the Great Wall twice 5.He rode (ride)a bike in the park yesterday afternoon 6.-Can I use the e-dictionary now,mom? -Go ahead.Your dad has fixed (fix)it. 7.They spent (spend)two hours playing basketball on the playground this morning 8.Since then,I have expressed (express)my love,care and respect to every important person around me. 9.A lot of people praised the great robot show on the Internet just now (praise) 10.Over the past 5 years,we have flown (fly)to more than 30 countries. 11.The air and water quality in Yangzhou have greatly improved (improve) in recent years. 12.The Father of Hybrid Rice,Yuan Longping has been dead (die)for 5 years 13.I used to drink (drink)milk every morning 14.The power suddenly went (go)out during the terrible storm last night 15.Although the exam was hard,she passed (pass)it with her hard work. 16.The teachers have taught (teach)us a lot of useful skills. 2 17.So far,the manager has succeeded (success)in solving the problem. 18.All ofus have made (make)great progress since we started junior high school. 19.He Jing was invited (invite)to give a speech at the graduation ceremony at Harvard University last month 20.All the mistakes in your paper have been corrected (correct)by your teacher already. 课后练习 一.单句语法填空。 1.I'm so happy that I have finished (finish)nearly half of my homework so far 2. Who hid (hide)my basketball behind the tree?It took me a long time to find it 3.Recently,more and more people have chosen (choose)to visit Yangzhou during holidays. 4. -Have you seen the film before,Lily? -Yes.I saw it online the other day.(see) 5.The old man died last year.He has been dead for a year.(die) 6.-Where did you work before joining this company? -I have worked in the IT department of a start-up for two years.(work) 7.I've been looking forward to a trip to Hong Kong for ages(age),but I still wonder whether June is a good time to visit Hong Kong. 8.A large number of green plants have been placed (place)in every classroom since the new term began.(begin) 9.Many ancient paintings in the local museum were protected (protect) well by workers a hundred years ago. 10.The important notice hasn't been put (not put)up on the wall yet,so few students know about it. 3 二.语法填空。 Usually,turning 30 can make people feel nervous and woried.36 Bryan Tsiliacos,a man from California,doesn't feel the same as others do.He decided to complete 30 acts of kindness before his thirtieth birthday. After his 29th birthday,Tsiliacos'anxiety (began to grow,so he tried 37 (cheer)himself up."I pulled out a piece of paper and started to write down all the things I was 38 (thank)for,"Tsiliacos said."And at that moment,I realized every wonderful thing that had happened to me was thanks to the support and generosity of others. This inspired Tsiliacos to start the "30 acts by 30"challenge.He hoped to support workers who worked in different fields.39 (he)first act was making desserts for fire men in San Jose.40 firemen were touched by his creations. Next he asked headmasters from schools in Oakland for wish lists to help 41 (teacher).With the help of several companies,he gave away $12,000 worth of goods 42 them.In the end,he 43 (hand)out 118 packages around San Francisco. Now Tsiliacos is not in a hurry to reach his goal.He thinks that the acts themselves are 44 (important)than completing them quickly."I'm going to achieve it no matter how long it 45 (exact)takes,"he said. 【答案】36.However 37.to cheer 38.thankful 39.His 40.The 41.teachers 42.to 43.handed 44.more important 45.exactly 【解析】 【导语】本文主要讲述了加州的一位名叫Bryan Tsiliacos的男子在30岁生日之 4 前决定完成30个善举的故事。 【36题详解】 句意：然而，来自加利福尼亚州的Bryan Tsiliacos却和其他人不一样。根据"Usually turning30 can make people feel nervous and worried"可知表转折，来自加利福尼亚 州的Bryan Tsiliacos和其他人不一样，空格后有逗号，故用however"然而"，位 于句首，首字母需要大写。故填However 【37题详解】 句意：29岁生日后，T$siliacos的焦虑开始加剧，所以他试着做点什么让自己振作 起来。根据句意，可知这里用动词cheer的不定式形式to cheer,表示目的。故填 to cheer. 【38题详解】 句意：我拿出一张纸，开始写下所有我感激的事情。be thankful for."因为...而 感激"。故填thankful。 【39题详解】 句意：他的第一幕是为圣何塞的消防员制作甜点。根据"first act'"可知这里用he 的形容词性物主代词hs"他的"。位于句首，首字母需要大写。故填His。 【40题详解】 句意：消防员们被他的创作感动了。根据"for firemen"可知，这里特指消防员， 用定冠词he,位于句首，首字母需要大写。故填The。 【41题详解】 句意：接下来，他向奥克兰学校的校长们索要帮助教师的愿望清单。根据句意， 可知这里用名词teacher的复数形式teachers表示泛指。故填teachers。 【42题详解】 句意：他想把护理包给他们。give sth to sb"给某人某物"，固定用法。故填to。 【43题详解】 句意：最后，他在旧金山分发了1l8个包裹。根据前句的"wanted"可知时态为一 般过去时，hand的过去式为handed。故填handed. 【44题详解】 句意：他认为表演本身比迅速完成表演更重要。根据"tha"可知这里用形容词 important的比较级more important。故填more important。 【45题详解】 句意：无论它究竟需要多长时间，我都会实现这一目标。分析句子结构可知这里 用exact的副词形式exactly修饰动词takes。故填exactly。 三.阅读理解(2025长郡10月考) A Student Writing Contest We are looking for stories,poems,plays or songs. Topics for Children (aged 7 and under) ※The best day The best gift I've received Topics for Pre-teens (aged 8 to 12) It really made me feel sad ×Home alone Topics for Teens (aged 13 to 19) Everyday heroes ※Thank you,Mom ·One entry(参赛作品)per person and no more than 1,000 words. Each student should email your entry to Mrs.Black at writingcontest@gfi.com before March 10,including your name,age,school,phone number and email address. Students will only be told if they win.The winners will receive a phone call between June 28 and 30. 21.What can 16-year-old Jenny write about? A.Best gift. B.Home alone. C.Dear mom. 22.Which of the following is TRUE? A.A student's home address is needed B.The winners will get a call at the end of June. C.All the entries should be sent to Mr.Black. 【答案】21.C22.B 6 【解析】 【导语】本文主要介绍了写作比赛的公告。 【21题详解】 细节理解题。根据Topics for Teens(aged13to19)”及Thank you,.Mom”可知， Jey是16岁，属于青少年(13-19岁)组，该组的主题是：“日常的英雄”和谢 谢你，妈妈”，选项C符合主题。故选C。 【22题详解】 细节理解题。根据"Students will only be told if they win.The winners will receive a phone call between June28and30.可知，获胜者将在6月28日至30日接到电话， 这段时间属于六月底。故选B。 B In a city of China,older people are going back to school for a very special class. It is a course called "Make Friends with AI.A young teacher named Li Xiaoyi started this class to help people like her own grandfather use modern technology.Al,or Artificial Intelligence(人工智能)，is like a very clever computer program.Li teaches her students how to talk to an AI chatbot(聊天机器人)on their phones.This chatbot can answer questions and help with many daily tasks.For many of the older students, it is their first time to learn about Al,and they are very excited. Li knows that teaching older people is different from teaching young students. She must be very patient and move slowly.In every lesson,she repeats the instructions carefully.She also uses simple language instead of difficult tech words. For example,when she wants them to open a menu,she tells them to find and click the three dots (on the screen.She also teaches them to make the words on their phone bigger so they can read more easily.Her goal is to make everyone feel comfortable and show them that technology can be friendly and not frightening The students learn many useful things.They practice asking the AI for delicious recipes ()planning a fun trip to another city,or getting simple health advice. Some students even chat with the AI when they feel a bit lonely.It's like having a new friend who is always there to talk to.The students love what they can do.One 68-year-old man now uses AI to make beautiful online postcards from his old holiday photos.Another student puts animated animals into her travel videos.This special class helps the community's older people feel happy and connected to the world today. 23.What is the writer's purpose of writing this text? A.To give advice on how to become a teacher B.To introduce a useful class to older people. C.To show different kinds of technology classes 24.What does the underlined word "frightening"in paragraph 2 mean? A.Scary. B.Convenient C.Modern. 25.How do the students feel about learning to use AI? A.Worried that it is too difficult. B.Happy with the new skills they have. C.Bored because it is not very useful 26.What does the writer suggest about technology learning for older people? A.It mainly opens a new world for the old. B.It is too expensive for most old people. C.It is a piece of cake for old people. 【答案】23.B24.A25.B 26.A 【解析】 【导语】本文讲述中国某城市一位老师开设与AI交朋友”课程，耐心教老年人 使用AI,帮助老年人融入现代科技、感受快乐并与世界建立连接。 【23题详解】 推理判断题。通读全文可知，文章介绍了在中国的老年人参加A虹课程，学习相 关技术并应用到生活中，选项B的向老年人介绍一个有用的课程”符合题意。故 选B。 【24题详解】 词句猜测题。根据show them that technology can be friendly and not fiightening” 可知fiightening”和friendly意思相反，选项A的scay意为“令人害怕的，符 合题意。故选A。 【25题详解】 细节理解题。根据最后一段的The students love what they can do.”可知，这些学 生对所学的内容感到高兴，选项B的“他们对自己掌握的新技能感到高兴”符合题 意。故选B。 【26题详解】 细节理解题。根据最后一句的This special class helps the community's older people feel happy and connected to the world today..”可知，这个课程能帮助老人和外部世 界连接，选项A的它主要为老年人开启了一个新的世界符合题意。故选A。 A Chinese 2D animated film,Nobody,has become a summer hit.It was first shown on August 2nd,2025.By September 13,it had made over 1.5 billion yuan, breaking the record for Chinese 2D animated films.It also got 8.6 points on Douban, winning the hearts of millions of kids and adults. The film tells a warm story.The story follows a small pig monster (who lives in a place called Langlang Mountain.He works hard for the Cave King,but doesn't know how to please the king,and makes him angry.After losing his job,he decides to leave the mountain and teams up with three other small and nameless monsters.Together,they pretend (to be the famous group from Journey to the West and start a dangerous journey to grow and find their true selves.They grow from finding food to save villagers.A famous line says,"We may be nobodies in society, but we are important at home,"making people think about life The film touches hearts because it shows the hardship of common people.The little monsters face big challenges and laugh at difficulties.Even though they are weak,they fight bravely.Many viewers say they see themselves in these characters. Nobody also stands out for its beautiful art style.Made by Shanghai Animation Film Studio,it uses traditional Chinese painting skills.The soft colors ofink-wash paintings and perfect brushwork create a special,dreamlike world. The movie also shows respect for Chinese culture.For example,it references the well-known 1986 TV show Journey to the West and ancient buildings from Shanxi Province.All these make the story feel both old and new. Nobody is more than a movie.It brings joy and teaches us that everyone can be a hero. 27.How does the writer show the success of Nobody in paragraph 1? A.By giving examples. B.By listing the numbers C.By making a comparison. 28.What do we know about the pig monster in paragraph 2? A.He is nobody in society,but is still hardworking. B.He is pleased with life in Langlang Mountain C.He teams up with the other three famous monsters. 29.What is the main theme of Nobody? A.Journey of famous monsters. B.Chinese traditional culture. C.Growth and self-discovery. 30.Which statement is TRUE about the making of the film? A.It stands out for its exciting intemational style. B.It is made by Shanxi Animation Film Studio. C.It gets some ideas from the 1986 TV show Journey to the West. 【答案】27.B 28.A29.C30.C 10 【解析】 【导语】本文主要介绍了中国动画片Wobo暑期票房大热，讲述了小怪物成长 冒险，展现了传统文化和励志精神。 【27题详解】 细节理解题。根据By September13,it had made over 1.5 billion yuan,.breaking the record for Chinese 2D animated films.It also got 8.6 points on Douban,winning the hearts of millions of kids and adults.可知，通过列举电影的票房收入和豆瓣评分这 些具体的数字，清晰地展示了Nobo这部电影的成功。故选B。 【28题详解】 细节理解题。根据He works hard for the Cave King,but doesn't know how to please the king,and makes him angry."We may be nobodies in society,but we are important at home.可知，小猪怪在社会上是无名小卒，但它工作很努力。故选A。 【29题详解】 细节理解题。根据Together,they pretend(假装)to be the famous group from Journey to the West and start a dangerous journey to grow and find their true selves..可知，电影主题是成长和自我发现。故选C。 【30题详解】 细节理解题。根据For example,.it references(参考)the well-known 1986TV show Journey to the West可知，它参考了l986年版的经典电视剧《西游记》，并 从中获得了一些灵感。故选C。 11 新人教九上单元语法 U1语法：现在完成时vs一般过去时 一般过去时 现在完成时 定义 过去某个具体时间发生、且现在已经结束的动作或状态，不强调对 “现在” 的影响。 ① 过去发生的动作，对现在有明确影响； ② 过去开始的动作，持续到现在还没结束。 基本结构 主语＋动词过去式(be 动词用was/were，实义动词变过去式) 主语＋have/has＋动词过去分词(be 动词过去分词是been，实义动词变过去分词) 常见标志词 表过去的时间：yesterday，last week，two days ago，in 2020，this morning等；过去的具体场景：when I was 10，just now。 表“影响” (不确定过去时间)：already，yet，ever，just等；表“持续” (从过去到现在的时间段)：since＋过去时间点，for＋时间段，recently，in the past 5 years等。 例句 She went to the park yesterday. 她昨天去了公园。 She has already gone to the park.她已经去公园了。 注意事项 1.现在完成时和一般过去时的被动语态 现在完成时的被动语态：have/has been done 一般过去时的被动语态：was/were done The house has been built for 3 years. 这个房子已经被建了三年了。 Beijing opera ________ (introduce) to more people around the world during the 2020 Mei Lanfang Art Festival. 在北京2020年梅兰芳艺术节期间，京剧得以向全球更多观众介绍。 2.现在完成时与表示一段时间的for短语、since短语或从句等连用时，应注意将句中的谓语动词转换为延续性动词。常考的非延续性动词与延续性动词之间的转换：die→be dead, borrow→keep, buy→have, leave→be away, begin/start→be on, finish→be over, join→be in/be a member of, come→be here, go→be there等。例如： Jim left his hometown last year. 吉姆去年离开了家乡。 →Jim has been away from his hometown for a year. 吉姆离开家乡一年了。 课堂练习 1. Linda ____________ (lie) in bed for two days because of the cold. 2. AI ____________(make) a big difference to the whole world over the past few years. 3. Yesterday we ____________(hold) a meaningful class meeting on environmental protection. 4. My sister ____________ (be) to the Great Wall twice. 5. He ____________(ride) a bike in the park yesterday afternoon. 6. —Can I use the e-dictionary now, mom? —Go ahead. Your dad ____________ (fix) it. 7. They____________(spend) two hours playing basketball on the playground this morning. 8. Since then, I ____________(express) my love, care and respect to every important person around me. 9. A lot of people____________ the great robot show on the Internet just now (praise) 10. Over the past 5 years, we ____________ (fly) to more than 30 countries. 11. The air and water quality in Yangzhou have greatly ____________(improve) in recent years. 12. The Father of Hybrid Rice, Yuan Longping ____________(die) for 5 years. 13. I used ____________(drink) milk every morning. 14. The power suddenly ____________ (go) out during the terrible storm last night. 15. Although the exam was hard, she ____________ (pass) it with her hard work. 16. The teachers have ____________(teach) us a lot of useful skills. 17. So far, the manager ____________ (success) in solving the problem. 18. All of us____________ (make) great progress since we started junior high school. 19. He Jing____________(invite) to give a speech at the graduation ceremony at Harvard University last month. 20. All the mistakes in your paper ____________ (correct) by your teacher already. 课后练习 一．单句语法填空。 1. I'm so happy that I___________ (finish) nearly half of my homework so far 2. Who ____________(hide) my basketball behind the tree? It took me a long time to find it. 3. Recently, more and more people ___________ (choose) to visit Yangzhou during holidays. 4. —___________you ___________ the film before，Lily？ —Yes.I ___________ it online the other day.(see) 5. The old man___________ last year.He___________ for a year.(die) 6. —Where ___________ you ___________before joining this company？ —I ___________in the IT department of a start-up for two years.(work) 7. I've been looking forward to a trip to Hong Kong for ___________(age)，but I still wonder whether June is a good time to visit Hong Kong. 8. A large number of green plants ___________ (place) in every classroom since the new term ___________.(begin) 9. Many ancient paintings in the local museum___________ (protect) well by workers a hundred years ago. 10. The important notice ___________ (not put) up on the wall yet, so few students know about it. 二．语法填空。 Usually, turning 30 can make people feel nervous and worried. ____36____, Bryan Tsiliacos, a man from California, doesn't feel the same as others do. He decided to complete 30 acts of kindness before his thirtieth birthday. After his 29th birthday, Tsiliacos' anxiety (焦虑) began to grow,so he tried_ ____37____ (cheer) himself up. “I pulled out a piece of paper and started to write down all the things I was ____38____ (thank) for,” Tsiliacos said. “And at that moment, I realized every wonderful thing that had happened to me was thanks to the support and generosity of others.” This inspired Tsiliacos to start the “30 acts by 30” challenge. He hoped to support workers who worked in different fields. ____39____ (he) first act was making desserts for fire men in San Jose. ____40____firemen were touched by his creations. Next he asked headmasters from schools in Oakland for wish lists to help ____41____ (teacher). With the help of several companies, he gave away $12, 000 worth of goods ____42____them. In the end, he ____43____ (hand) out 118 packages around San Francisco. Now Tsiliacos is not in a hurry to reach his goal. He thinks that the acts themselves are ____44____ (important) than completing them quickly. “I'm going to achieve it no matter how long it ____45____ (exact) takes,” he said. 三．阅读理解（2025长郡10月考） Student Writing Contest We are looking for stories, poems, plays or songs. Topics for Children (aged 7 and under) ※ The best day ※ The best gift I’ve received Topics for Pre-teens (aged 8 to 12) ※ It really made me feel sad ※ Home alone Topics for Teens (aged 13 to 19) ※ Everyday heroes ※ Thank you, Mom • One entry (参赛作品) per person and no more than 1,000 words. • Each student should email your entry to Mrs. Black at writingcontest@gfi.com before March 10, including your name, age, school, phone number and email address. • Students will only be told if they win. The winners will receive a phone call between June 28 and 30. 21. What can 16-year-old Jenny write about? A. Best gift. B. Home alone. C. Dear mom. 22. Which of the following is TRUE? A. A student’s home address is needed. B. The winners will get a call at the end of June. C. All the entries should be sent to Mr. Black. B In a city of China, older people are going back to school for a very special class. It is a course called “Make Friends with AI”. A young teacher named Li Xiaoyi started this class to help people like her own grandfather use modern technology. AI, or Artificial Intelligence (人工智能), is like a very clever computer program. Li teaches her students how to talk to an AI chatbot (聊天机器人) on their phones. This chatbot can answer questions and help with many daily tasks. For many of the older students, it is their first time to learn about AI, and they are very excited. Li knows that teaching older people is different from teaching young students. She must be very patient and move slowly. In every lesson, she repeats the instructions carefully. She also uses simple language instead of difficult tech words. For example, when she wants them to open a menu, she tells them to find and click the three dots (点) on the screen. She also teaches them to make the words on their phone bigger so they can read more easily. Her goal is to make everyone feel comfortable and show them that technology can be friendly and not frightening. The students learn many useful things. They practice asking the AI for delicious recipes (食谱), planning a fun trip to another city, or getting simple health advice. Some students even chat with the AI when they feel a bit lonely. It’s like having a new friend who is always there to talk to. The students love what they can do. One 68-year-old man now uses AI to make beautiful online postcards from his old holiday photos. Another student puts animated (动画的) animals into her travel videos. This special class helps the community’s older people feel happy and connected to the world today. 23. What is the writer’s purpose of writing this text? A. To give advice on how to become a teacher. B. To introduce a useful class to older people. C. To show different kinds of technology classes. 24. What does the underlined word “frightening” in paragraph 2 mean? A. Scary. B. Convenient. C. Modern. 25. How do the students feel about learning to use AI? A. Worried that it is too difficult. B. Happy with the new skills they have. C. Bored because it is not very useful. 26. What does the writer suggest about technology learning for older people? A. It mainly opens a new world for the old. B. It is too expensive for most old people. C. It is a piece of cake for old people. C A Chinese 2D animated film, Nobody, has become a summer hit. It was first shown on August 2nd, 2025. By September 13, it had made over 1.5 billion yuan, breaking the record for Chinese 2D animated films. It also got 8.6 points on Douban, winning the hearts of millions of kids and adults. The film tells a warm story. The story follows a small pig monster (妖怪) who lives in a place called Langlang Mountain. He works hard for the Cave King, but doesn’t know how to please the king, and makes him angry. After losing his job, he decides to leave the mountain and teams up with three other small and nameless monsters. Together, they pretend (假装) to be the famous group from Journey to the West and start a dangerous journey to grow and find their true selves. They grow from finding food to save villagers. A famous line says, “We may be nobodies in society, but we are important at home,” making people think about life. The film touches hearts because it shows the hardship of common people. The little monsters face big challenges and laugh at difficulties. Even though they are weak, they fight bravely. Many viewers say they see themselves in these characters. Nobody also stands out for its beautiful art style. Made by Shanghai Animation Film Studio, it uses traditional Chinese painting skills. The soft colors of ink-wash paintings and perfect brushwork create a special, dreamlike world. The movie also shows respect for Chinese culture. For example, it references (参考) the well-known 1986 TV show Journey to the West and ancient buildings from Shanxi Province. All these make the story feel both old and new. Nobody is more than a movie. It brings joy and teaches us that everyone can be a hero. 27. How does the writer show the success of Nobody in paragraph 1? A. By giving examples. B. By listing the numbers. C. By making a comparison. 28. What do we know about the pig monster in paragraph 2? A. He is nobody in society, but is still hardworking. B. He is pleased with life in Langlang Mountain. C. He teams up with the other three famous monsters. 29. What is the main theme of Nobody? A. Journey of famous monsters. B. Chinese traditional culture. C. Growth and self-discovery. 30. Which statement is TRUE about the making of the film? A. It stands out for its exciting international style. B. It is made by Shanxi Animation Film Studio. C. It gets some ideas from the 1986 TV show Journey to the West. 1 学科网（北京）股份有限公司 $