10（学案）第十讲 八上 Unit4（课件PPT）-【中考通】2026年中考英语分层复习（课标版 河南专用）

该初中英语中考复习课件系统覆盖动词用法（die/protect）、介词辨析（over/above/on）、比较级结构等核心考点，严格对接中考说明，分析近三年真题中这些考点的考查权重，归纳盲填、选词填空、汉译英等常考题型，体现备考的针对性和实用性。 课件亮点在于“考点讲练+真题演练+素养提升”模式，如通过die的同源串记（die-dying-death-dead）和语境跟练培养语言能力，结合“the+比较级...the+比较级”句型解析提升思维品质。包含2024-2025年中考真题改编题，指导学生掌握答题技巧，教师可依托分层作业设计，高效推进中考冲刺复习。

中考通 英语 2026 封面版式 软件使用 本课件使用office软件制作，建议老师使用相应软件打开 编辑修改 本课件全文可单击进行编辑修改 便捷操作 快速核答案题号以及返回图标等都有超链接 点击即可跳转至相应页面 封面版式 第十讲　八上　Unit4 目录 教材词汇梳理 01 熟词生义拓展 02 教材句型小结 03 核心考点讲练 04 语言知识运用 05 熟词生义拓展 第十讲　八上　Unit4 答案速核 （点击题号跳转到试题） 1 4 2 6 3 5 D A E C B F 返回目录 答案速核 1 2 3 4 教材句型小结 （点击题号跳转到试题） 5 When and where did it happen　 Was anyone hurt/ Did anyone get hurt　 I’m sorry to hear that/ It is sad to hear about it　 Do you know how to protect ourselves/what to do (when an earthquake happens)　 If we are indoors， we can be under a strong table or desk/ We can move to clear areas/...　 第十讲　八上　Unit4 返回目录 核心考点讲练 答案速核 （点击题号跳转到试题） 1 4 2 6 3 5 7 8 9 10 11 12 13 14 15 from　 out　 in　 of　 for　 deaths　 dies　 dead　 dying　 died　 eating　 themselves　 from　 protect　 protection　 protective　 on　 over　 above　 第十讲　八上　Unit4 返回目录 核心考点讲练 答案速核 （点击题号跳转到试题） 16 17 18 19 20 21 22 23 24 on　 over　 safer　 laugh　 heard　 believe　 studying　 made fun of　 made up his mind　 make a living　 make a noise　 make his way　 more　 better　 fewer　 less　 第十讲　八上　Unit4 返回目录 核心考点讲练 答案速核 （点击题号跳转到试题） 25 26 more and more popular　 healthier　 cheaper　 warmer and warmer　 27 28 29 30 bravest　 third　 of　 books　 31 32 33 34 whether　 to　 about/of　 sure　 unsure　 ensure　 第十讲　八上　Unit4 返回目录 语言知识运用 答案速核 （点击题号跳转到试题） 1 6 7 8 一、 二、 1 2 3 4 5 三、 1 2 3 4 5 6 7 8 9 10 2 3 4 5 clear　 truth　 understand　 covered　 cheaper　 sadly　 disappearing　 reasons　 search for　 came true　 plays a role in　 face to face　 sent off　 better　 work　 written　 tells　 because　 on　 its　 correct　 results　 make　 第十讲　八上　Unit4 返回目录 1.  sky (n.) 天，天空 在天空中 2.   2022 (adj.) 清澈的；明白清楚的，明显的；晴朗的 (v.) 移 走，清除 → (adv.) 显然地；清楚地 3.   (n.) 美丽；美人 →beauties (pl.) → (adj.) 美丽的，美好的；很好的，出色的 → (adv.) 出色地，很好地 in the sky　 clear　 clearly　 beauty　 beautiful　 beautifully　 教材词汇梳理 01　必备词汇 返回目录 4.  nature (n.) 自然；性质 → (adj.) 自然的，天然的；天生的 → (adv.) 自然地，天然地；天生地 5.   (n.) 地，地面　(v.) 限制外出； 以……为根据　He was grounded tonight because he broke the rules. Her decision was grounded in her personal experience. natural　 naturally　 ground　 返回目录 6.   (adj.) 湿的，潮湿的 → (比较级) → (最高级) The tour covers several famous parks in the city. 7.   (v.) 覆盖，遮盖；掩盖；包括　 (n.) 盖子；罩；(书刊的)封面 The book has a beautiful cover. 被……覆盖 wet　 wetter　 wettest　 cover　 be covered with/by　 返回目录 8.  earth (n.) 地球；土，泥；大地 究竟，到底；世界上 在地球上 9.  surface (n.) 表面 在表面上 on earth　 on the earth　 on the surface　 10.  control2022 (v. & n.)控制 → (过去式/过去分词) → (现在分词) 在控制中 失去控制 控制；管理，掌握 controlled　 controlling　 be under control　 be out of control　 be in control of　 返回目录 11.   (v.) 死，死亡 → (现在分词) → (过去式/过去分词) → (n.) 死，死亡 课标新增 → (adj.) 垂死的，临终的 → (adj.) 死亡的，去世的 die ...死于…… die 灭绝，消失 die　 dying　 died　 death　 dying　 dead　 of/from　 out　 返回目录 12.   (n.) 木头，木材 →woods (pl.) 森林 → (adj.) 木制的，木头的 13.   (n.) 原因，理由，解释　(v.) 推理，推断 → (adj.) 合理的 14.   (v.) 保护 → (n.) 保护 protect... ... 保护……使之免受……之害 wood　 wooden　 reason　 reasonable　 protect　 protection　 against/from　 返回目录 15.   (v.) 喂(养)，饲养 → (过去式/过去分词) 以……为食 16.   (adv.) 不多 → (比较级) → (最高级) 越来越少 17.   (n.) 陆地；土地　(v.) 登岸(陆)；降落 降落，登陆 feed　 fed　 feed on　 little　 less　 least　 less and less　 land　 land on　 返回目录 18.   (n.) 地震 一次地震 19.   (adj.) 失踪的，找不到的，丢失的；缺少的 → (v.) 失踪；想念 20.   (n.) 失火，火灾；火　(v.) 射击；开枪； 解雇；开除 The officer ordered his men to fire. The manager had to fire the man for his poor performance. earthquake　 an earthquake　 missing　 miss　 fire　 返回目录 21.   (n.) 级别；水平，程度 处于高水平 22.  sad (adj.) 难过的；悲哀的 → 2024 (adv.) 悲伤地；伤心地 → (n.) 悲伤；忧伤 23.  middle (n.) 中间，中央，中心 在……中间 level　 at a high level　 sadly　 sadness　 in the middle of　 返回目录 24.  shake (v.) 摇动，(使)颤动；抖(掉)　 (n.) 奶昔 a strawberry shake → (过去式) → (过去分词) 握手 25.  understand2022 (v.) 理解，懂 → (过去式/过去分词) → (n.) 理解；了解　 (adj.) 体谅人的 shook　 shaken　 shake hands　 understood　 understanding　 返回目录 26.  whole (adj.) 整体的，全部的　(n.) 整个，整体 整整一天 作为一个整体；总体上 27.   (v.) 出现；看来；好像 → (v.) 消失；不见 →appearance (n.) 出现；露面；外貌；外观；外表 28.   (v.) 派遣；打发；安排去 → (过去式/过去分词) 2025寄出；送行 the whole day　 as a whole　 appear　 disappear　 send　 sent　 send off　 返回目录 29.   (adj.) 便宜的；廉价的 → (比较级) → (最高级) → (adv.) 便宜地 30.   (adv.) 在线，联网　(adj.) 在线的，联网的 网上购物 31.   (n.) 资料；信息 ⁠一则消息 32.   2023 (adj.) 完美的；最佳的 → (adv.) 完美地 cheap　 cheaper　 cheapest　 cheaply　 online　 online shopping　 information　 a piece of information 　 perfect　 perfectly　 返回目录 33.   2022 (adj.) 确实的，真的；真正的 → (adv.) 确实；真正地 → (n.) 实情；事实 ⁠实现 ⁠说实话 34.   (adj.) 正确的；恰当的　 (v.) 改正，纠正，修正 → (adv.) 正确地 true　 truly　 truth　 come true　 to tell the truth　 correct　 correctly　 返回目录 35.  search (v. & n.)搜索，搜查 搜寻 sth.寻找某物 36.   2024 (n.) 结果，后果；成绩，得分 ……的结果 结果 37.   (adj.) 昂贵的，花钱多的 →inexpensive(反义词) (adj.) 便宜的 search for　 in search of　 result　 the result of　 as a result　 expensive　 返回目录 38.   (n.) 快乐，愉快，满意 → (v.) 请 → 2022 (adj.) 高兴；满意；愉快 → (adj.) 令人愉快的；宜人的；吸引人的 . (回答感谢时)不用谢，别客气。 . 当然可以/乐意效劳。 39.   (n.) 知识，学问 → 2024 (v.) 知道 pleasure　 please　 pleased　 pleasant　 It’s my pleasure　 With pleasure　 knowledge　 know　 返回目录 40.  drop2023 (n.) 滴，水珠　(v.) 放弃；停止 She’s trying to drop her habit of eating junk food. 一滴…… 顺便拜访 a drop of...　 drop by　 返回目录 1.   成千上万，几千 2.   发现 3.   在某事中起作用 4.   在……的帮助下 5.   处于危险中 6.   面对面 7.   向上看；查阅 8.   专心致志于……； 沉迷于…… thousands of　 find out　 play a part/role in sth.　 with the help of　 in danger　 face to face　 look up　 lose oneself in...　 02 必备短语　　 9.   和……分享…… share ... with ...　 返回目录 cover A. v. 遮盖 B. v. 包括 C. v. 占(一片面积)；走过(一段路程) D. v. 报道 E. n. (书刊的)封面 F. n. 盖子；罩 熟词生义拓展 (　D　)1. The local paper covered the story of the missing child. (　A　)2. She covered her face with her hands. (　E　)3. I drew a beautiful picture on the cover of my notebook to make it special. D A E 返回目录 (　C　)4. It took them four days to cover 150 miles. (　B　)5. Our final exam will cover everything we have learned this term， from the first unit to the last. (　F　)6. He placed the cover over the swimming pool to keep leaves out. C B F 返回目录 喜好和偏爱 A： Which do you like better， plants or animals？ B： I like animals better. I keep a pet dog. I think animals are friendly. A： Why do you think so？ B： Because animals are our friends. What about you？ A： I like plants better. I think roses are the nicest of all the flowers. 01 交际句型 教材句型小结 返回目录 关心与安慰 A： A terrible earthquake struck Qinghai！ B： Was it serious？ A： Yes. Many buildings fell down. Some people died and many people were missing. B： I’m sorry to hear that. A： We should learn to protect ourselves from the earthquake. B： You are right. How can we protect ourselves from the earthquake？ A： Let’s ask Miss Wang for some advice. 返回目录 确定与不确定 A： I’m sure there are many interesting things to see on the Internet. B： I’m not sure whether/if the information is true. We should use it carefully. 返回目录 A： Li Ming， I heard a terrible earthquake hit Qinghai！ B： Oh， no！1. ⁠？ A： It happened in Yushu in Qinghai Province early this morning. B： 2. ⁠？ A： Yes. More than 200 people were hurt and some people were missing. B： 3. ⁠. A： Me， too. It was so terrible. I think we should really learn to protect ourselves from the earthquakes. 4. ⁠ ⁠？ When and where did it happen　 Was anyone hurt/ Did anyone get hurt　 I’m sorry to hear that/ It is sad to hear about it　 Do you know how to protect ourselves/what to do (when an earthquake happens)　 02 针对训练 返回目录 B： I think we should run as quickly as we can to get out of the classroom. A： No， running can be very dangerous. The most important thing is to stay calm. B： What else should we do？ A： 5. ⁠ ⁠. B： Thank you for telling me these. A： You’re welcome. 　　 If we are indoors， we can be under a strong table or desk/ We can move to clear areas/...　 返回目录 核心考点1　die的用法 Without rainforests， many beautiful plants and animals would die out. 没有热带雨林，许多美丽的动植物将会灭绝。(八上P85) 核心考点讲练 v.死亡；消失； 停止运转 die down (冲突、骚动)逐渐平息 die of 死于疾病/饥寒/年老(内因) die from 死于外伤、事故、环境(外因) die for 为……而死;极度渴望 die in 在……中死亡(事件/场所) die out (物种、习俗等)灭绝 die away (声音、风、光线等)逐渐消散 die 返回目录 die (v.) 死亡 →died (过去式/过去分词) →dying (adj.) 濒死的；即将消亡的 →death (n.) 死亡 →dead (adj.) 死亡的 同源串记 返回目录 1. Every year， thousands of sea animals die from plastic pollution in the ocean.每年，成千上万的海洋动物死于海洋中的塑料污染。 2. Everyone should have a dream that is worth dying for. 每个人都应该 有一个值得为之献身的梦想。 写作靓句　 返回目录 盲填 1. (2025·烟台)A new study warns that millions of Europeans could die heat-related causes by the end of the century. 2. (2025·福建改编)It will be really sad to see the corals (珊瑚) dying ⁠. 3. (2024·贵州)Sadly， when Phoebe was 68， she died ⁠ a car accident. 4. (2025·潍坊)Ralph， the child can’t stand it long in there. There isn’t enough air， and besides， she will die ⁠ fear. from　 out　 in　 of　 中考演练　 返回目录 5. (2025·甘肃改编)In today’s world， many people are dying ⁠ quick success， but real growth takes time and the right mindset (思维 模式). for　 返回目录 用die的适当形式填空 6. Some people only became successful after their ⁠. The famous artist Vincent Van Gogh only sold one painting all through his life， but now his paintings sell for millions of pounds. 7. When the hero in the movie， all the fans cry because their favorite character is ⁠. 8. Last summer， we noticed the big old tree was —its leaves turned yellow and fell. Although we cared for it， the old tree ⁠ in September. deaths　 dies　 dead　 dying　 died　 语境跟练　　 返回目录 核心考点2　protect的用法 Knowing some ways to protect yourself will help to keep you safe in the earthquake.了解一些保护自己的方法有助于你在地震中保证自身的安 全。(八上P93) protect sb./sth. (against/from sth.) 保护某人/某物(免受……) protect...from doing sth. 保护……免受…… protect oneself 自我保护 protect 返回目录 protect (v.) 保护 →protection (n.) 保护 →protective (adj.) 防护的；有保护欲的 同源串记 返回目录 1. Lots of animals are in danger now， so we should protect them from dying out.许多动物现在都处于危险之中，所以我们应该保护它们免 于灭绝。 2. Making friends online can be fun， but protecting ourselves should always come first. 网上交友可能很有趣，但保护自己应该永远是第一 位的。 写作靓句　 返回目录 方框选词 eat　from　they 9. (2024·连云港) Scientists believe that people might avoid food that looks terrible. In this way， people can protect themselves from ⁠ something bad or dangerous. 10. (2025·武汉改编)Our ancestors (祖先) had to protect ⁠ from dangerous animals like spiders and tigers， or they would lose their lives. 11. (2025·遂宁)They checked tools and put in a machine to protect the space station ⁠ space junk. eating　 themselves　 from　 中考演练　 返回目录 用protect的适当形式填空 12. People have shown a great gift for inventing clothes to ⁠ themselves from environmental dangers. Clothes offer them ⁠ between their skin and the environment. People have made all kinds of ⁠ clothing to stay away from any danger. protect　 protection　 protective　 语境跟练　　 返回目录 核心考点3　辨析over，above与on Many of them live in the trees over 30 meters from the ground.它们中的 许多动物生活在距地面30多米的树上。(八上P85) 词汇 用法 over 表示某物在另一物的正上方，不接触，强调垂直关系 above 表示一个物体高于另一物体，不接触，不一定表示垂直 返回目录 词汇 用法 on 表示某物在另一物的表面上，两者相互接触 返回目录 A strong stone bridge stands over the wide river， connecting the two sides of the town. 一座坚固的石桥横跨在宽阔的河流之上，连接着小 镇的两边。 写作靓句　 返回目录 方框选词 over　above　on 13. (2025·长春)The water bottle can’t be Mr. Liu’s. The name ⁠ the bottle isn’t his. 14. (2025·安徽)Man-made trees that tower ⁠ the city help to keep the city cool. 15. (2024·南京)When there’s danger—like a hawk (鹰) flying —roosters (公鸡) make loud calls to warn nearby chickens. on　 over　 above　 中考演练　 返回目录 盲填 16. On a sunny day， we had a picnic ⁠ the grass. We laughed and talked over lunch， watching birds fly ⁠ our heads. It was a perfect day. on　 over　 语境跟练　　 返回目录 核心考点4　辨析make，let与have A special language makes computers talk with each other. 一种特殊的语 言让电脑能互相交谈。(八上P97) 词汇 用法 make make sb. do sth.让某人做某事 make sth./sb.＋adj.使某事/某物/某人处于某种状态 make sb.＋n.使某人成为…… make oneself done 使某人自己被…… let let sb. do sth.让某人做某事 返回目录 词汇 用法 have have sb. do sth.让某人做某事 have sb./sth. doing 让某人/某事处于某种状态(宾语与现 在分词表示的动作之间为主动关系，且动作正在进行) have sth. done让某事被做(宾语与过去分词表示的动作 之间是被动关系，强调别人做的动作) 返回目录 make的相关短语 make fun of 取笑；嘲笑 make up 构成；编造；化妆 make one’s way 前进；成功 make up one’s mind 下定决心 make a living 谋生 make a noise发出噪声 同源串记 返回目录 No matter how difficult it is， I have made up my mind to never give up my dream. 无论有多困难，我都已下定决心永不放弃我的梦想。 写作靓句　 返回目录 方框选词 believe　safe　laugh　study　hear 17. (2025·临沂改编)Nowadays， great inventions are making our lives more convenient (便利的) and ⁠. 18. (2025·贵州)Spend time with people who will make you ⁠ and help you believe in yourself. 19. (2023·大连)In Pontevedra， Spain， people don’t shout. People don’t have to try hard to make themselves ⁠. safer　 laugh　 heard　 中考演练　 返回目录 20. (2025·白银)Let’s in ourselves， work hard， and keep improving. 21. 　Mom had me ⁠ all the afternoon last weekend. believe　 studying　 believe　safe　laugh　study　hear 返回目录 用make相关短语的适当形式填空 22. Li Hua used to be ⁠ a lot because of his poor grades. But he has ⁠ to study hard. His parents ⁠ by selling vegetables in the market. Every morning when birds outside， Li Hua starts reading books. Through hard work， he believes he will ⁠ to a top university. made fun of　 made up his mind　 make a living　 make a noise　 make his way　 语境跟练　　 返回目录 核心考点5　比较级＋and＋比较级 But now，rainforests are becoming smaller and smaller， so we should protect them. 但是，现在热带雨林变得越来越小，所以我们应该保护 它们。(八上P85) 结构 意义 形容词/副词比较级＋and＋形容词/副词 比较级 越来越…… more and more＋多音节形容词/副词 The＋形容词/副词比较级＋主语＋谓 语， the＋形容词/副词比较级＋主语＋ 谓语 越……，越…… 返回目录 最高级常用句式 1. the＋最高级＋in/of/among，如：He is the tallest child in his class. 他 是他班里最高的孩子。 2. one of the＋形容词最高级＋名词复数，如：She is one of the cleverest children I’ve ever met. 她是我见过的最聪明的孩子之一。 3. the＋序数词＋形容词最高级＋名词单数＋范围，如：It’s the second longest river in my hometown. 它是我家乡的第二长河。 灵活语用 返回目录 1. The more you study， the more you know. 你学得越多，知道 的就越多。 2. In recent years， e-books are becoming more and more popular. 近年 来，电子书变得越来越受欢迎。 写作靓句　 返回目录 用括号内单词的适当形式填空 23. (2025·枣庄)Besides， the (many) places you choose， the ⁠ (good) your road trip can be. 24. (2025·天津)With (few) sunspots (太阳黑子)， the sun was giving out ⁠ (little) energy which made the earth warm. more　 better　 fewer　 less　 中考演练　 返回目录 汉译英 25. (2025·泰安改编)社区食堂在中国越来越受欢迎，它们为老年人 提供更健康、更便宜的菜肴。 Community canteens have become ⁠ in China， and they provide old people with ⁠ and ⁠ dishes. 26. (2025·天津改编)今天，由于空气污染，地球变得越来越暖和。 Today the earth is getting ⁠ because of air pollution. more and more popular　 healthier　 cheaper　 warmer and warmer　 返回目录 方框选词 three　book　brave　of 27. He is one of the ⁠ soldiers among us. 28. The Yangtze River is the ⁠ longest river in the world. 29. She was the kindest ⁠ all the teachers in our school. 30. This novel is one of the most famous ⁠ of the 20th century. bravest　 third　 of　 books　 语境跟练　　 返回目录 核心考点6　be sure＋宾语从句 I’m not sure if that is a good idea. 我不确定那是不是一个好主意。(八 上P99) be sure be not sure ＋ whether/if 从句不确定是否…… be sure of/about...对……有把握 be sure to do sth.一定会做某事 be sure ＋ that 从句 相信……(that可省略) 返回目录 sure (adj.) 确信的 →surely (adv.) 无疑地；一定 →unsure (adj.) 不确定的；缺乏信心的 →ensure (v.) 确保 同源串记 If you follow my advice， I’m sure you’ll make progress in your study and life. 如果你听从我的建议，我相信你会在学习和生活 中取得进步。 写作靓句　 返回目录 盲填 31. (2025·资阳)Yan Yan， a Chinese actress， was not sure ⁠ to join at first. She feared missing calls during performances. 32. (2025·新疆改编)From this experience， I learn that if we face difficulties bravely， we are sure ⁠ succeed. 33. (2025·武汉改编)Scientists aren’t completely sure ⁠ the reasons. whether　 to　 about/of　 中考演练　 返回目录 用sure的适当形式填空 34. Before our camping trip， Mom asked me， “Are you ⁠ you haven’t forgotten to bring the tent？” I felt ⁠ so I checked again. Dad double-checked to ⁠ we’d brought everything. 语境跟练　　 sure　 unsure　 ensure　 返回目录 一、选择适当的单词并用其正确形式补全句子 clear　　cover　　reason　　sad　　understand　　disappear　　 cheap　　true 1. After the teacher’s explanation， the solution to the problem became very ⁠. 2. We should always tell the ， even when we make mistakes. 3. Feel free to ask questions if you don’t ⁠. 4. The mountain is ⁠ with snow all year round. 5. Online shopping is often ⁠ than buying things in stores. clear　 truth　 understand　 covered　 cheaper　 语言知识运用 返回目录 6. The little girl looked at her broken toy ， almost ready to cry. 7. Many old traditions are slowly ⁠ because of modern life. 8. One of the main ⁠ I like summer is that we have a long vacation. sadly　 disappearing　 reasons　 clear　　cover　　reason　　sad　　understand　　disappear　　 cheap　　true 返回目录 二、选择适当的短语并用其正确形式补全句子 face to face　　play a role in　　search for　　come true　　send off 1. I had to ⁠ my lost keys all over the classroom after school. 2. My dream of becoming a doctor finally ⁠ after eight years. 3. Good sleep ⁠ helping us listen carefully in class. 4. It’s better to talk ⁠ than just sending messages when solving problems. 5. Recently， my smartphone broke and had to be ⁠ for repair for a week or so. search for　 came true　 plays a role in　 face to face　 sent off　 返回目录 三、语篇填空 主题：人与社会 话题：DeepSeek对医学的影响 核心素养：技术运用 涉及本讲单词：on， correct， result， make result　write　work　good　because　tell　on　make　it　correct In the past few years， a lot of us have used “Doctor Google” to try to find out why we have health problems. But now， there is a much 1. tool for that， and that is DeepSeek. Doctors think this new AI will change their 2. completely and make patients’ lives better. better　 work　 返回目录 Experts (专家) have 3. a book called The AI Revolution (革命) in Medicine. They say DeepSeek will give doctors important and life‑saving advice right away. The book also 4. ⁠ us that DeepSeek will be very useful for doctors. It’s like having a helper 5. ⁠ it knows all medical knowledge. The experts believe that AI will have a big effect 6. ⁠ many parts of medicine. It can help doctors find out diseases， keep medical records and so on. written　 tells　 because　 on　 result　write　work　good　because　tell　on　make　it　correct 返回目录 However， the experts also know that AI is not a perfect solution (解决方案) for all medical problems. DeepSeek might make small mistakes in 7. medical advice， even though it usually seems right. Sometimes， it gives wrong answers that look 8. ⁠. So we should not use AI without doctors watching over it. Patients can write down the 9. ⁠ AI offers and take them to a real doctor. Doctors， on the other hand， can compare the advice of AI with their own knowledge and experience， and then 10. ⁠ the best decisions for their patients. Only in this way can we use AI to help people perfectly. its　 correct　 results　 make　 result　write　work　good　because　tell　on　make　it　correct 返回目录 本讲分层作业设计见《分层练案》P28 返回目录 $