Unit 5 Power of Ideas单词讲解练习 2026-2027学年人教版英语九年级上册

本讲义聚焦初中英语Unit 5“Power of Ideas”主题，系统梳理61个核心词汇，涵盖名词（如invention, camera）、动词（如invent, produce）、形容词（如super, rapid）等，通过派生词、短语搭配、例句构建从基础含义到语境应用的学习支架，衔接词汇积累与主题表达。 该资料突出语言能力与学习能力培养，“练一练”即时巩固词汇应用，词性转化系统梳理词形变化，单项选择和选词填空强化语境理解，助力学生提升词汇运用能力。课中辅助教师分层教学，课后参考答案便于学生自主查漏补缺，培养独立学习习惯。

Unit 5 Power of Ideas 【重点单词讲解】 1. invention /ɪnˈvenʃn/ 发明 派生词：invent v. 发明；inventor n. 发明家 短语搭配：great invention 伟大发明 例句：The computer is a useful invention.（电脑是实用的发明。） 练一练：Many ancient Chinese __________ (invent) changed the world. 2. camera /ˈkæmərə/ 照相机 例句：Use a camera to record experiments.（用相机记录实验。） 练一练：This digital __________ (照相机) is light. 3. laptop /ˈlæptɒp/ 笔记本电脑 例句：I take my laptop to online classes.（我带笔记本电脑上网课。） 练一练：The teacher uses a __________ (笔记本电脑). 4. high-speed train /ˌhaɪ'spiːd treɪn/ 高速列车 例句：We took a high-speed train to another city.（我们坐高铁去另一座城市。） 练一练：The __________ (高速列车) runs very fast. 5. super /ˈsuːpə(r)/ 顶好的；超级的 例句：This is a super useful learning tool.（这是超级好用的学习工具。） 练一练：She is a __________ (顶好的) learner. 6. sunglasses /ˈsʌnɡlaːsɪz/ 墨镜 例句：Wear sunglasses in bright sunshine.（强光下戴墨镜。） 练一练：I lost my new pair of __________ (墨镜). 7. mini- /ˈmɪni/ 微型的 例句：I carry a mini dictionary in my bag.（我包里带迷你词典。） 练一练：This is a __________ (微型的) printer. 8. itself /ɪtˈself/ 它自己 例句：The machine can turn off itself.（机器能自动关机。） 练一练：The computer fixed __________ (it). 9. button /ˈbʌtn/ 按钮 例句：Press this button to print.（按这个按钮打印。） 练一练：The red __________ (按钮) is for exit. 10. hundreds (of ...) 许多；成百上千 1) 表确数：`基数词 + hundred`，不加 -s，不加 of（例：three hundred students） 2) 表概数：`hundreds of + 名词复数`，必须加 -s 和 of（例：hundreds of students） 3) 通用规则：thousand/million/billion 用法和 hundred 完全一致 例句：Hundreds of new words are in this book.（这本书有成百上千生词。） 练一练：__________ (hundred) of students use e-books. 11. produce /prəˈdjuːs/ 生产 派生词：product n. 产品; production n. 生产；制作 例句：This factory produces learning tools.（这家工厂生产学习用具。） 练一练：The farm __________ (produce) fresh fruit last year. 12. file /faɪl/ 文件 例句：Save your homework as a file.（把作业保存成文件。） 练一练：Open this study __________ (文件). 13. plastic /ˈplæstɪk/ 塑料 例句：Reduce plastic stationery.（减少塑料文具使用。） 练一练：This ruler is made of __________ (塑料). 14. printer /ˈprɪntə(r)/ 打印机 派生词：print v. 打印；印刷 n. 印刷品 ; printing n. 印刷术；印刷 例句：The printer runs out of ink.（打印机没墨了。） 练一练：Please connect the new __________ (打印机). 15. invent /ɪnˈvent/ 发明 例句：Who invented paper?（谁发明了纸？） 练一练：Bell _________(invent) the telephone in 1876. 16. all over the world全世界 例句：This learning method is popular all over the world.（这个学习法全球流行。） 练一练：People ______________________ (全世界) use computers. 17. suppose /səˈpəʊz/ 认为；应当 派生词：supposed adj. 假定的；想象的 短语搭配：be supposed to do 应当做某事 例句：I suppose this way works well.（我认为这个方法管用。） 练一练：You are __________ (应当) finish homework on time. 18. wheel /wiːl/ 车轮 例句：The wheel is an old great invention.（轮子是古老伟大的发明。） 练一练：Bikes have two __________ (车轮). 19. frozen /ˈfrəʊzn/ 冻硬的；结冰的 例句：The river is frozen in winter.（冬天河面结冰。） 练一练：We bought __________ (冻硬的) vegetables. 20. complete /kəmˈpliːt/ 完成 派生词：completely adv. 完全地 例句：Complete your reading task today.（今天完成阅读任务。） 练一练：I __________ (complete) agree with your idea. 21. layer /ˈleɪə(r)/ 层 例句：There is a thin layer of dust on the book.（书上一层薄灰。） 练一练：The cake has three cream __________ ( layer). 22. melt /melt/ 融化 例句：Ice melts under warm sun.（冰在暖阳下融化。） 练一练：The ice cream is __________ (melt) quickly. 23. pipe /paɪp/ 管道 例句：Water flows through long pipes.（水从长管道流过。） 练一练：The water __________ (管道) is broken. 24. tunnel /ˈtʌnl/ 隧道 例句：The train passes a long tunnel.（火车穿过长隧道。） 练一练：They built a mountain __________ (隧道). 25. tourism /ˈtʊərɪzəm/ 旅游业 派生词：tourist n. 游客；旅行者 ; tour v. & n. 旅行；游览 例句：Tourism develops fast in this city.（这座城市旅游业发展迅速。） 练一练：Local __________ ( tour) brings jobs. 26. gain /ɡeɪn/ 获得 短语搭配：gain knowledge 获取知识 例句：We gain much knowledge from books.（我们从书本收获大量知识。） 练一练：You can__________ (gain) skills by practice. 27. reality /riˈæləti/ 事实；现实 派生词：real adj. 真实的；实际的 ;really adv. 真正地；确实 例句：His dream finally turns into reality.（他的梦想终成现实。） 练一练：Face the __________ (事实) bravely. 28. papermaking /ˈpeɪpəˌmeɪkɪŋ/ 造纸工艺；造纸术 例句：Papermaking is one of the Four Great Inventions.（造纸术是四大发明之一。） 练一练：We learn ancient ________________ (造纸工艺). 29. responsible /rɪˈspɒnsəbl/ 有责任的 派生词： responsibility n. 责任；职责 ; irresponsible adj. 不负责任的 短语搭配：be responsible for 对……负责 例句：You are responsible for your study.（你要对自己的学习负责。） 练一练：Everyone is __________ (有责任的) for the class. 30. rapid /ˈræpɪd/ 迅速的 派生词：rapidly adv. 迅速地 例句：The rapid development of tech changes study.（科技快速发展改变学习。） 练一练：Our vocabulary makes __________ (迅速的) progress. 31. shape /ʃeɪp/ 形状 短语搭配：shape your future 塑造你的未来 例句：Reading shapes your way of thinking.（阅读塑造思维方式。） 练一练：Clouds have different __________ (形状). 32. bronze /brɒnz/ 青铜 例句：The old tool is made of bronze.（这件古工具是青铜制的。） 练一练：He won a __________ (青铜) medal. 33. ware /weə(r)/ 器皿；制品 例句：The museum shows old pottery ware.（博物馆展出古陶器。） 练一练：The shop sells clay __________ (陶器). 34. stone /stəʊn/ 石头 例句：The ancient wall uses big stones.（古城墙用大石头建成。） 练一练：The path is full of small __________ (石头). 35. jute /dʒuːt/ 黄麻；黄麻纤维 例句：This bag is made of jute.（这个袋子是黄麻做的。） 练一练：Jute is natural __________ (黄麻纤维). 36. fibre /ˈfaɪbə(r)/ 纤维 例句：Cotton is soft natural fibre.（棉花是柔软天然纤维。） 练一练：Vegetables have plant __________ (纤维). 37. expensive /ɪkˈspensɪv/ 昂贵的 例句：This learning machine is too expensive.（这台学习机太贵。） 练一练：We can’t buy the __________ (昂贵的) tablet. 38. officer /ˈɒfɪsə(r)/ 官员 例句：The government officer visited our school.（政府官员参观我校。） 练一练：The police __________ (官员) helped us. 39. workshop /ˈwɜːkʃɒp/ 作坊；讲习班 例句：We joined a writing workshop.（我们参加写作讲习班。） 练一练：The artist works in a small __________ (作坊). 40. none /nʌn/ 没有一个 例句：None of the answers are wrong.（所有答案都没错。） 练一练：__________ (没有一个) of them finished early. 41. ideal /aɪˈdiːəl/ 理想的 短语搭配：ideal study place 理想学习地点 例句：The quiet library is an ideal place to read.（安静图书馆是阅读理想之地。） 练一练：This is an __________ (理想的) timetable. 42. certain /ˈsɜːtn/ 确定的；某些 派生词：certainly adv. 当然；必定 ; uncertain adj. 不确定的；含糊的 例句：Certain words are hard to memorize.（某些单词很难背诵。） 练一练：I am __________ (确定的) of my answer. 43. suitable /ˈsuːtəbl/ 合适的 派生词：suit v. 适合; unsuitable adj. 不合适的；不适宜的 例句：This book is suitable for middle school students.（这本书适合中学生。） 练一练：You should find a __________ (合适的) learning method. 44. liquid /ˈlɪkwɪd/ 液体 例句：Water is clear liquid.（水是清澈液体。） 练一练：The medicine is white __________ (液体). 45. cheap /tʃiːp/ 便宜的 派生词：cheaply adv. 便宜地 例句：This notebook is cheap and good.（这本笔记本物美价廉。） 练一练：You can buy __________ (便宜的) pens here. 46. creation /kriˈeɪʃn/ 创造 派生词：create v. 创造 例句：Paper is a great ancient creation.（纸是伟大古代创造。） 练一练：The story is his own __________ (创造). 47. later on 后来 例句：We will practice listening later on.（稍后我们练习听力。） 练一练：__________ (后来), he mastered the skill. 48. speed up 加速 例句：Speed up your reading speed.（加快你的阅读速度。） 练一练：If you hurry, you can __________ (加速). 49. Arabic /ˈærəbɪk/ 阿拉伯语 例句：He can speak simple Arabic.（他会说简单阿拉伯语。） 练一练：This book is written in __________ (阿拉伯语). 50. result in 导致 例句：Careless reading results in mistakes.（粗心阅读导致错误。） 练一练：Hard work __________ (导致) good grades. 51. lead to 导致；带来 例句：More reading leads to larger vocabulary.（多阅读带来更大词汇量。） 练一练：Laziness will __________ (导致) bad results. 52. birth /bɜːθ/ 诞生；出生 派生词：birthday n. 生日 短语搭配：the birth of paper 纸的诞生 例句：We celebrate the birth of new inventions.（我们庆祝新发明的诞生。） 练一练：People remember the __________ (诞生) of printing. 53. rapidly /ˈræpɪdli/ 迅速地 派生词：rapid adj. 迅速的 例句：Our reading level improves rapidly.（我们阅读水平快速提升。） 练一练：Technology develops __________ (rapid)nowadays. 54. afford /əˈfɔːd/ 买得起；承担得起 派生词：affordable adj. 负担得起的；平价的 短语搭配：afford to do sth. 承担得起做某事 例句：I can’t afford that expensive learning machine.（我买不起那台贵的学习机。） 练一练：We can __________ (买得起) simple tools. 55. company /ˈkʌmpəni/ 公司 短语搭配：a tech company 科技公司 例句：This company makes e-books.（这家公司生产电子书。） 练一练：He works in a digital __________ (公司). 56. sticky /ˈstɪki/ 黏的 例句：Glue makes the paper sticky.（胶水让纸张发黏。） 练一练：The candy is __________ (黏的). 57. production /prəˈdʌkʃn/ 生产 派生词：produce v. 生产 例句：The production of paper changed history.（纸张生产改变历史。） 练一练：The __________ （produce) of paper has a long history. 58. gradually /ˈɡrædʒuəli/ 逐渐地 派生词：gradual adj. 逐渐的 例句：You will gradually master words.（你会慢慢掌握单词。） 练一练：Her listening improved __________ (逐渐地). 59. widely /ˈwaɪdli/ 广泛地 派生词：wide adj. 广泛的; widen v. 加宽；拓宽 例句：English is widely used all over the world.（英语全球广泛使用。） 练一练：This invention is __________ (广泛地) used. 60. be looking to do sth 力求；试图 例句：We are looking to improve reading skills.（我们力求提升阅读能力。） 练一练：They are looking __________(learn) new techniques. 61. glider /ˈɡlaɪdə(r)/ 滑翔机 例句：The glider flies silently in the sky.（滑翔机在空中静静飞行。） 练一练：He likes flying a __________ (滑翔机). 同步练习 一、词性转化 1. ______ n. 发明；创造 → ______ v. 发明；创造 → ______ n. 发明家；发明者 2. ______ pron. 它自己 → ______ pron. 它(主格 / 宾格) → ______ adj. 它的(形容词性物主代词) → ______ pron. 它的(名词性物主代词) 3. ______ v. 生产；繁育 → ______ n. 产品；制品 → ______ n. 生产；制作 4. ______ n. 打印机；印刷公司 → ______ v. 打印；印刷 n. 印刷品 → ______ n. 印刷术；印刷 5. ______ v. 认为；推断 → ______ adj. 假定的；想象的 6. ______ adj. 冻硬的；冰封的 → ______ v. 冻结；结冰 → ______ adj. 极冷的；结冰的 7. ______ v. 完成；结束 adj. 完全的；彻底的 → ______ adv. 完全地；彻底地 8. ______ n. 旅游业 → ______ n. 游客；旅行者 → ______ v. & n. 旅行；游览 9. ______ n. 现实；事实 → ______ adj. 真实的；实际的 → ______ adv. 真正地；确实 10. ______ adj. 作为原因的；有责任的 → ______ n. 责任；职责 → ______ adj. 不负责任的 11. ______ adj. 迅速的；瞬间的 → ______ adv. 迅速地；快速地 12. ______ adj. 某些；确定的 pron. 某些 → ______ adv. 当然；必定 → ______ adj. 不确定的；含糊的 13. ______ adj. 合适的；适宜的 → ______ v. 适合；相配 → ______ adj. 不合适的；不适宜的 14. ______ adj. 便宜的 adv. 低廉地 → ______ adv. 廉价地；便宜地 → ______ adj. 昂贵的；高价的 15. ______ n. 创造；作品 → ______ v. 创造；创作 → ______ adj. 有创造力的；创意的 16. ______ n. 起源；诞生 → ______ n. 生日 17. ______ v. 买得起；能做 → ______ adj. 负担得起的；平价的 18. ______ adv. 逐渐地；逐步地 → ______ adj. 逐渐的；渐进的 19. ______ adv. 广泛地；普遍地 → ______ adj. 宽阔的；广泛的 → ______ v. 加宽；拓宽 二、单项选择 1. —What are these chopsticks made ______? —They are made ______ bamboo. A. of; of B. of; from C. from; of D. from; from 2. This kind of paper is ______ from wood. It looks very smooth. A. made B. invented C. created D. discovered 3. The mobile phone ______ by Martin Cooper in 1973. It changed the world greatly. A. invents B. invented C. is invented D. was invented 4. You are ______ to hand in your homework before Friday. Don’t be late. A. supposed B. supposing C. suppose D. supposes 5. —Do you know ______ tea was first drunk? —In the 5th century BC, I think. A. where B. when C. how D. why 6. The artist ______ a beautiful painting and showed it to everyone. A. discovered B. invented C. created D. supposed 7. We should ______ good use of every minute to prepare for the coming exam. A. take B. have C. put D. make 8. The project was ______ ahead of time because everyone worked very hard. A. complete B. completing C. completed D. completely 9. This kind of computer is made ______ Shenzhen and sold all over the world. A. by B. from C. in D. into 10. —What makes you ______ that we are going to have a test tomorrow? —I saw the teacher preparing papers. A. suppose B. supposed C. supposing D. to suppose 三、单词拼写 根据首字母或汉语提示完成单词。 1. A single bright t______ can lead to valuable new inventions. 2. We should use our c______ minds to solve different kinds of problems. 3. Don’t keep your creative i______ to yourself; talk them out. 4. It takes strong c______ to put your new thoughts into real practice. 5. We can t______ simple daily thoughts into useful new tools. 6. The power of creative minds is far s______ than most people realize. 7. We should learn to ______ (分享) our different opinions with teammates. 8. Many useful ______ (发明) are born from ordinary people’s thoughts. 9. We will face many ______ (困难) before our ideas come true. 10. Try to ______ (创造) new ways when old methods don’t work. 11. We all have the ______ (能力) to come up with creative plans. 12. Being ______ (有创造力的) helps us make progress in study. 13. We can achieve great ______ (成就) with continuous thinking. 四、选词填空 阅读下面短文，从方框中选择适当的词，并用其正确形式填空（每词限用一次）。 create、important、spread、knowledge、change、think、influence、great、idea、practice Throughout history, ideas have had the power to 1. ______ the world. A single 2. ______ can start a revolution, inspire a generation, or solve a difficult problem. One of the most 3. ______ ideas in human history is the printing press. It helped 4. ______ knowledge across countries and made books available to common people. Before that, 5. ______ was only for the rich. This idea 6. ______ education and society forever. Another example is the theory of gravity. When Newton saw an apple fall, he 7. ______ deeply about why it happened. His idea not only explained the falling of objects but also had a 8. ______ influence on modern science. However, ideas alone are not enough. We must put them into 9. ______. Only when we take action can ideas truly make a difference. So, next time you have a good idea, don’t keep it to yourself. Share it, develop it, and let it 10. ______ the world! 五、用所给词的适当形式填空 1. Many great inventions ______ (influence) by earlier ideas throughout history. 2. Technology ______ (change) our lives greatly since the 20th century. 3. The first practical light bulb ______ (invent) by Thomas Edison in 1879. 4. The Internet makes it possible for us ______ (spread) information in seconds. 5. The students are encouraged to practice ______ (think) independently. 6. This idea is one of the most ______ (effect) ways to save energy. 7. Her new book has been ______ (wide) read by young people around the world. 参考答案 练一练答案 1. inventions 2. camera 3. laptop 4. high-speed train 5. super 6. sunglasses 7. mini 8. itself 9. button 10. Hundreds 11. produced 12. file 13. plastic 14. printer 15. invented 16. all over the world 17. supposed to 18. wheels 19. frozen 20. completely 21. layers 22. melting 23. pipe 24. tunnel 25. tourism 26. gain 27. reality 28. papermaking 29. responsible 30. rapid 31. shapes 32. bronze 33. ware 34. stones 35. jute 36. fibre 37. expensive 38. officer 39. workshop 40. None 41. ideal 42. certain 43. suitable 44. liquid 45. cheap 46. creation 47. Later on 48. speed up 49. Arabic 50. results in 51. lead to 52. birth 53. rapidly 54. afford 55. company 56. sticky 57. production 58. gradually 59. widely 60. to learn 61. glider 同步练习答案 1、 词性转化 1. invention n. 发明；创造 → invent v. 发明；创造 → inventor n. 发明家；发明者 2. itself pron. 它自己 → it pron. 它(主格 / 宾格) → its adj. 它的(形容词性物主代词) → its pron. 它的(名词性物主代词) 3. produce v. 生产；繁育 → product n. 产品；制品 → production n. 生产；制作 4. printer n. 打印机；印刷公司 → print v. 打印；印刷 n. 印刷品 → printing n. 印刷术；印刷 5. suppose v. 认为；推断 → supposed adj. 假定的；想象的 6. frozen adj. 冻硬的；冰封的 → freeze v. 冻结；结冰 → freezing adj. 极冷的；结冰的 7. complete v. 完成；结束 adj. 完全的；彻底的 → completely adv. 完全地；彻底地 8. tourism n. 旅游业 → tourist n. 游客；旅行者 → tour v. & n. 旅行；游览 9. reality n. 现实；事实 → real adj. 真实的；实际的 → really adv. 真正地；确实 10. responsible adj. 作为原因的；有责任的 → responsibility n. 责任；职责 → irresponsible adj. 不负责任的 11. rapid adj. 迅速的；瞬间的 → rapidly adv. 迅速地；快速地 12. certain adj. 某些；确定的 pron. 某些 → certainly adv. 当然；必定 → uncertain adj. 不确定的；含糊的 13. suitable adj. 合适的；适宜的 → suit v. 适合；相配 → unsuitable adj. 不合适的；不适宜的 14. cheap adj. 便宜的 adv. 低廉地 → cheaply adv. 廉价地；便宜地 → expensive adj. 昂贵的；高价的 15. creation n. 创造；作品 → create v. 创造；创作 → creative adj. 有创造力的；创意的 16. birth n. 起源；诞生 → birthday n. 生日 17. afford v. 买得起；能做 → affordable adj. 负担得起的；平价的 18. gradually adv. 逐渐地；逐步地 → gradual adj. 逐渐的；渐进的 19. widely adv. 广泛地；普遍地 → wide adj. 宽阔的；广泛的 → widen v. 加宽；拓宽 二、单项选择 1. A 2. A 3. D 4. A 5. B 6. C 7. D 8. C 9. C 10. A 三、单词拼写 1. thought 2. creative 3. ideas 4. courage 5. turn 6. stronger 7. share 8. inventions 9. difficulties 10. create 11. ability 12. creative 13. achievements 四、选词填空 1. change 2. idea 3. important 4. spread 5. knowledge 6. influenced 7. thought 8. great 9. practice 10. create 五、用所给词的适当形式填空 1. are influenced 2. has changed 3. was invented 4. to spread 5. thinking 6. effective 7. widely 学科网（北京）股份有限公司 $