最新新概念英语第二册：第78课课文详解及语法解析
新概念英语第二册Lesson78内容详解ppt课件
★delightBiblioteka d adj. 欣喜的，高兴的be delighted with 因 ... 而高兴，因 ... 而欣喜
e.g. 他因这个构想而欣喜万分。
He is delighted with t精h选ispptidea.
精选ppt
1、After reading an article entitled ‘Cigarette Smoking and Your Health’. I lit a cigarette to calm my nerves. an article entitled 题名为…的文章 light a cigarette 点支烟 calm my nerves 使我的神经镇定 e.g. 这位护士给这个小男孩一些糖果使 他冷静下来。
★urge v. 力劝，怂恿
urge sb. to do sth. 怂恿某人做……
e.g. 昨天晚上我们怂恿他们去打架。
We urged them to fight last night.
★satisfaction n. 满意，满足
satisfactory adj. 令人满意的
satisfied
adj. 感到满意的
flood.
★symptom n. 症状
e.g. 发烧是许多疾病的一种症兆。
Fever is a symptom of 精m选apptny illnesses.
★temper n. 脾气 lose one's temper 发火 keep one's temper 别发火 e.g. 因为他的疾病，他总是发火。
What is the patient suffering from? ② vt. 遭受（痛苦、损害等）
新概念2第78课解析
We urged them to stay. I was urged to sign the contract.
★satisfaction • (u) 满意，满足 contentment, pleasure
He took great satisfaction from playing tห้องสมุดไป่ตู้e piano well. • (c) 令人满意（或满足的）事物 something that pleases
• 表原因的连词： • because，as，since，for
My friends kept on offering me cigarettes and cigars.
keep on doing sth. = continue doing sth. 持续不断的做
offer sb. sth. 给某人某物 We offered him a better position.
After reading an article entitled 'Cigarette Smoking and Your Health'
After/before + doing = 时间状语从句 an article entitled 题名为……的文章
• For a whole week I did not smoke at all and during this time, my wife suffered terribly.
★appetite n. 胃口，食欲 appetite 表示的胃口仅对食物而言 Have appetite for sth. 有关于……的食欲 I have good appetite for the ice cream.
新概念英语第二册 Lesson 78 The last one
Symptoms ['sɪm(p)təm] n. [临床] 症状；征兆 patients with flu symptoms.…有流感症状的病人。 positve symptom 阳性症状 Temper n.脾气；性情 keep one’s temper 别发火 发脾气）
-8.When my old friend Brian urged me to accept a cigarette, it was more than I could bear.当我的老朋友布赖恩极
力劝我接受一枝香烟时，我再也忍不住了。
Urge sb to do sth 怂恿某人做某事
1.力劝，敦促，催促；促使： Mary urged her sister to study English.极力劝她学习英语。 Mary urged her sister to come earlier.催促早点到。 2.怂恿；引诱；煽动： Mary urged her sister to play truant with her.怂恿陪她一块逃学。 more than I could bear=I couldn’t bear More than表示“超出” The theory is more than I could understand.
-9.I took one guiltily, lit it and smoked with satisfaction.
我内疚地接过一枝点上，心满意足地抽起来。
Guiltily adv. 内疚地；有罪地 -When I asked him what he was doing, he smiled guiltily and then put the parcel on the desk. 当我问他正干什么时, 他内疚地笑了, 然后把那个大包拿到了桌上. Satisfaction n. 满意，满足；赔偿； with satisfaction 满意地 ; 心满意足地 ; 与满意 -‘I have nothing to regret,’ he said with satisfaction. to the satisfaction of 达到令…满意的程度 ； 令……满意 -To the satisfaction of the teacher, Tom answered the question very well. 令老师满意的是，汤姆把问题回答得非常好。 Satisfy 使满意，满足（要求）
新概念二Lesson78 The last one
Translation
1)He kept on saying that he was tired. 2)Keep off the flower bed. 3)You've made much progress. Keep it up! 4)If you keep it up, you'll be able to set up a new world record. 5)Although he walked as fast as he could, he still couldn't keep up with his father. 6) In order to keep up with his classmates, he worked harder than ever. 7)He shut all the doors and windows to keep out the wind. 8)16,000-volt power line. Keep out! 9)It's very cold today. We'd better keep in. 10)When the dog was kept in, it barked loudly.
e.g. I have good appetite for the ice cream.
8.produce v. 拿出 =take out; 生产 →production n.生产
New Words
9.urge v. 力劝，怂恿 ※urge sb. to do sth. 怂恿某人做…… e.g. We urged them to stay. 10.satisfaction n. 满意，满足 →satisfactory adj. 令人满意的 11.delighted adj. 感到高兴的，欣喜的 glad/happy/pleased 感到高兴的
新概念英语第二册Lesson78内容详解
★entitle vt. 以…为名，取名，给…题名 e.g. 这个作家还没有给他的新书取名呢。 The writer hasn’t entitled his new book yet. e.g. 这本书被命名为《太阳依旧升起》。 The book was entitled The Sun Also Rises. ____________________ ★ calm v.使镇定 ＆ adj.平静的，冷静的 e.g. 他使自己镇定一些了。 He calmed himself a little. calm. 镇定下来 calm down
5、My friends kept on offering me cigarettes and cigars. keep on doing sth. 持续不断的做 某事 e.g. 他一直说个不停。 He kept on talking all the time． e.g. 这个孩子正在大声的哭，但是仍然在看 电视。 The child was crying loudly, but he kept on watching TV. offer sb. sth. 提供给某人某物 offer sb. sth. = provide sth. for sb. e.g. 我们将提供给他一个更好的职位。 We will offer him a better position.
★delighted
adj. 欣喜的，高兴的 be delighted with 因 ... 而高兴，因 ... 而欣喜 e.g. 他因这个构想而欣喜万分。 He is delighted with this idea.
1、After reading an article entitled ‘Cigarette Smoking and Your Health’. I lit a cigarette to calm my nerves. an article entitled 题名为…的文章 light a cigarette 点支烟 calm my nerves 使我的神经镇定 e.g. 这位护士给这个小男孩一些糖果 使他冷静下来。 The nurse calmed him by giving the little boy some sweets/candies.
新概念英语第二册Lesson78 The last one
Lesson78 The last one ?Everyday EnglishA friend in need is a friend indeed. 患难见真情。
Key Structures主谓一致一、主谓一致三原则主谓一致是指谓语动词与主语在人称和数上保持一致，主谓一致必须遵循三原则：语法一致原则，意义一致原则，就近一致原则。
1. 语法一致原则：最基本的“主谓一致”规则是：“单则单，复则复”，指主语是单数形式，谓语动词用单数形式，主语是复数形式，谓语也用复数形式。
不可数名词作主语，谓语动词用单数；可数名词的复数形式作主语，谓语动词用复数。
Tom is a good student. 汤姆是个好学生。
They often play football on the playground. 他们经常在操场上踢足球。
2. 意义一致：指主语形式上为单数，但意义为复数，因此谓语动词用复数形式；或主语形式上为复数,但表示单数意义，这是谓语动词用单数形式。
My family are having lunch now.我们一家人现在正吃午饭。
Twenty dollars is too expensive for the book.这本书20美元太贵了。
3. 就近一致：指谓语动词用单数形式还是用复数形式，取决于最靠近他的主语。
例如：Not only the teacher but also his students like playing football.不仅老师喜欢踢足球，而且他的学生也喜欢踢足球。
There is a pen and some books on the desk.课桌上有一支钢笔和一些书。
二、主谓一致常考题型1. 单数名词(代词)，不可数名词作主语时，谓语用单数形式，复数名词(代词)作主语，谓语用复数形式。
The desk is Tom’s. 这张桌子是汤姆的。
Some water is in the bottle. 一些水在瓶子里。
新概念英语第二册第78课课文
新概念英语第二册第78课课文
摘要：
一、课文的背景和主题
1.背景：新概念英语第二册第78课
2.主题：描述一场音乐会
二、音乐会前的准备
1.邀请亲朋好友
2.购买门票
3.安排交通和住宿
三、音乐会的进行
1.音乐会开始
2.表演者介绍
3.音乐表演
1) 古典音乐
2) 爵士乐
3) 流行音乐
四、音乐会后的活动
1.观众们的反应
2.举办派对庆祝
3.告别亲友
正文：
新概念英语第二册第78课课文描述了一场音乐会，从音乐会前的准备到音乐会的进行，再到音乐会后的活动。
在音乐会前，主人公们进行了精心的准备，包括邀请亲朋好友、购买门票以及安排交通和住宿。
这些准备工作为音乐会的顺利进行奠定了基础。
音乐会在热烈的气氛中开始。
首先，表演者们进行了介绍，让观众们对他们的背景和才华有了初步了解。
接着，音乐会进入了高潮阶段，各种类型的音乐表演轮番上演。
其中包括古典音乐、爵士乐和流行音乐等，让观众们领略了不同风格的音乐魅力。
音乐会结束后，观众们对这场音乐盛宴赞不绝口。
为了庆祝音乐会的成功举行，主人公们还举办了一个派对，邀请参加音乐会的亲朋好友一起分享喜悦。
最后，在告别亲友的过程中，音乐会画上了圆满的句号。
总的来说，新概念英语第二册第78课课文以一场音乐会为背景，生动地描绘了音乐会前后的各个环节。
新概念英语第二册Lesson78内容详解 ppt课件
• entitle
• v. 以……为名
New Words
• calm
• v. 使镇定
• nerve
• n. 神经
• concentration
• n. 集中，专心
• suffer
• v. 受苦，受害
• symptom
• n. 症状
• temper
• n. 脾气
I have good appetite for the ice cream. to one's taste 对某人的胃口 e.g. 这本书对我胃口。/这本书我喜欢。
This book is to my taste.
★produce v. 掏出，拿出 = take e.g. produce/take 掏出一把钥匙 新概念英语第二册Lesson78内容 a key
• appetite
• n. 胃口，食欲
• produce
• v. 拿出
• urge
• v. 力劝，怂恿
• satisfaction
• n. 满意，满足
• delighted
• adj. 欣喜的 新概念英语第二册Lesson78内容 详解
精品资料
★entitle vt. 以…为名，取名，给…题名
flood.
★symptom n. 症状
e.g. 发烧是许多疾病的一种症兆。
Fever is a sympto新m概念英o语f第m二册aLenssyon7i8l内l容nesses. 详解
★temper n. 脾气 lose one's temper 发火 keep one's temper 别发火 e.g. 因为他的疾病，他总是发火。
新概念英语第二册78课课文原文
新概念英语第二册78课课文原文英文回答：Lesson 78: Seeing is Believing.1. What is the main idea of this lesson?The main idea of this lesson is that we should not always believe what we see.2. What are some of the reasons why we might not believe what we see?There are several reasons why we might not believe what we see. One reason is that our senses can be deceived. Another reason is that our minds can play tricks on us.3. What are some of the examples of how our senses can be deceived?There are many examples of how our senses can be deceived. One example is the optical illusion. Another example is the mirage.4. What are some of the examples of how our minds can play tricks on us?There are many examples of how our minds can play tricks on us. One example is the placebo effect. Another example is the confirmation bias.5. What is the moral of this lesson?The moral of this lesson is that we should not always believe what we see. We should always be critical of what we see and try to find out if there is any evidence to support it.中文回答：第78课，眼见为实。
新概念第二册-Lesson 78 The last one? (独立主格)
whole week I did not smoke at all and during this time, my wife
suffered terribly. I had all the usual symptoms of someone giving up
smoking: a bad temper and an enormous appetite. My friends kept
独立主格作状语：
1. 表示时间 一般放在句首The meeting being over, all of us went home. 开完会后我们都回家了。the meeting being over相当于when the meeting was over
friend Brian urged me to accept a cigarette, it was more than I could 断做”的意思。
bear. I took one guiltily, lit it and smoked with satisfaction. My wife They made no effort to
pocket. After seven days of this I went to a party. Everybody around 断给我递香烟和雪茄。
me was smoking and I felt extremely uncomfortable. When my old keep on doing是“持续不
calm /kɑːm/ v. 使镇定 adj. 平静的, 沉着的 calmly /ˈkɑːmli/ adv. 镇定自若地
nerve /nɜː(r)v/ n. 神经 E.g. After reading an article entitled 'Cigarette Smoking and Your Health' I lit a cigarette to calm my nerves. 读完一篇题为《吸烟与健康》的文章之后，我点上了一枝 香烟，来镇定一下自己紧张的神经。 nervous /ˈnɜːrvəs/ adj. 紧张的, 不安的 (反) calm nervously /nɜːvəsli/ adv. 紧张地 (反) calmly
裕兴新概念英语第二册笔记_第78课_课文讲解
TextAfter reading an article entitled ' Cigarette Smoking and Your Health' I lit a cigaratte to calm my nerves.entitled ' Cigarette Smoking and Your Health'entitled 是过去分词，整个过去分词短语作定语修饰 an article 意思是一篇健康与吸烟的文章to calm my nerves 来镇定我紧张的神经（to do 不定式做目的状语），我点燃香烟目的是镇定我紧张的神经lit v点燃（light的过去式及过去分词）light1v点火，着火eg He lit a cigatette. 他点着香烟。
eg He lit up a cigarette.他点着香烟。
2v（使）供给光线，照亮eg We lit a candle and the candle lit the room.我们点燃蜡烛，蜡烛照亮了房间。
3v（使）容光焕发eg Suddenly a smile lit (up) her face. 突然微笑是她的脸亮了起来。
light的过去分词及过去式有2种，light---lit---lit; light---lighted---lighted,区别在于：**lit通常做谓语动词eg The match is lit. 火柴被点燃了。
**lighted通常做定语，当做形容词来使用时放在名词之前。
a lighted match被点燃过的火柴4n光sunlight阳光firelight火光5n引火物eg Can you give me a light, please? 能借个火吗？6n光线eg I can`t read while you are standing in my light. 你挡住我的光线了，我没法看书。
新概念二第78课笔记
Lesson78-The last one?1.v.授权；定名entitle构词法en(动词前缀)+title(n.)=entitle(v.)被称为...be entitled...=be called/named...授予某人使用...的权利entitle sb.to sth.2.v.使镇定；adj.平静的；n.风平浪静calm冷静下来!Calm down!保持冷静keep calm暴风雨前的宁静the calm before the storm3.n.神经；临危不乱的勇气nerve神经中枢nerve center惊慌失措lose one’s nerveadj.焦虑的nervous对...紧张be nervous about...4.v.力劝；鼓动urge力劝某人做某事urge sb.to do sth.5.n.专心；集中concentration注意力集中于...concentration on...全神贯注地做某事do sth.with concentration v.专心；集中concentrate全神贯注于...concentrate(oneself)on...6.adj.欣喜的delighted欣喜地做某事be delighted to do sth.7.n.症状；征兆symptom有一些...的症状/征兆have some symptoms of...8.n.脾气temper生气的/地in a bad temper发脾气lose one’s temper耐住性子keep one’s temper 9.n.食欲；渴望appetite胃口不好have a poor appetite显示出对...的渴望show an appetite for...10.v.受苦suffer遭受...之苦suffer from...n.苦难suffering给某人造成可怕的痛苦cause terrible suffering to sb.11.v.生产produce发明并生产某物invent and produce sth.n.产品production n.生产商producer adj.多产的productive 12.n.满足、满意satisfaction v.使...满意satisfy adj.满意的satisfied对...满意be satisfied with...=show one’s satisfaction with...使某人满意satisfy sb.心满意足地做某事do sth.with satisfaction13.本课短语读一篇题为《吸烟与健康》的文章read an article entitled'Cigarette Smoking and Your Health'点一支烟来镇定我的神经light a cigarette to calm my nerves聚精会神而又愉快地吸烟smoke with concentration and pleasure我最后一支烟my last cigarette整整一个星期for a whole week受了大罪suffer terribly具备了戒烟者的所有常见症状have all the usual symptoms of someone giving up smoking脾气暴躁和食欲旺盛a bad temper and an enormous appetite不断地向我递香烟和雪茄keep on offering me cigarettes and cigars毫不掩饰他们的愉悦make no effort to hide their amusement从我兜里掏出一包糖produce a packet of sweets from my pocket这样过了七天之后after seven days of this感觉极其不舒服feel extremely uncomfortable极力劝我接受一根香烟urge me to accept a cigarette超过我所能承受的be more than I can bear内疚地接过一支take one guiltily心满意足地抽烟smoke with satisfaction又一次恢复正常return to normal once more adv.不管怎么说anyway戒烟give up smoking他自己he himself。
新概念英语第二册笔记-第78课
Lesson 78 The last one?【Text】After reading an article entitled 'Cigarette Smoking and Your Health' I lit a cigarette to calm my nerves. I smoked with concentration and pleasure as I was sure that this would be my last cigarette. For a whole week I did not smoke at all and during this time, my wife suffered terribly. I had all the usual symptoms of someone giving up smoking: a bad temper and an enormous appetite. My friends kept on offering me cigarettes and cigars. They made no effort to hide their amusement whenever I produced a packet of sweets from my pocket. After seven days of this I went to a party. Everybody around me was smoking and I felt extremely uncomfortable. When my old friend Brian urged me to accept a cigarette, it was more than I could bear. I took one guiltily, lit it and smoked with satisfaction. My wife was delighted that things had returned to normal once more. Anyway, as Brian pointed out, it is the easiest thing in the world to give up smoking. He himself has done it lots of times!【课文翻译】读完一篇题为《吸烟与健康》的文章之后，我点上了一枝香烟，来镇定一下自己紧张的神经。
新概念英语第二册第78课课文
新概念英语第二册第78课课文
新概念英语第二册第78课的课文是关于一位名叫John Gilbert 的演员的故事。
以下是一些可能的笔记和重点语法及词汇：
课文笔记：
- John Gilbert是一位在无声电影时期非常受欢迎的演员。
- 他的职业生涯在有声电影的出现后受到了影响，因为他的声音被认为不适合电影。
- 他后来转向了舞台剧，但并未取得成功。
- 他最终因为酗酒过度而去世。
重点语法：
- 过去完成时：课文中提到了John Gilbert的职业生涯在有声电影出现后受到了影响，这里使用了过去完成时（had been affected）来表达这一事件在过去的一个时间点之前已经完成。
- 形容词的比较级：课文中提到John Gilbert的声音被认为不适合电影，这里使用了形容词的比较级（was not considered suitable）来表达一种比较。
重点词汇：
- silent films：无声电影
- talkies：有声电影
- stage：舞台
- alcoholism：酗酒
- career：职业生涯
- affect：影响
- voice：声音
- suit：适合
以上只是根据课文内容的一些可能的笔记和重点语法及词汇，具体的笔记和重点可能会因人而异。
新概念 二 Lesson 78 The last one？PPT课件
广义的指容忍各种事情的能力 He can't bear people smoking while he's eating.他受 不了别人在他吃饭的时候吸烟。
16
• urge v. to strongly advise someone to do something力劝，怂恿；n. 强烈欲望
• Jack urged me to resign and start my own business.
JACK怂恿我辞职自己创业。 • I urged that you consider this decision carelly. 我劝
12
• symptom n. something wrong with your body or mind which shows that you have a particular illness症状；a sign that a serious problem exists征 兆
• Symptoms include headaches and fever.症状 包括头疼和发烧。
a very bad situation that makes things very difficultfor yo源自 （受损失） • 我有严重的头疼病。
• I have been suffering from a bad headache.
• 我的奶奶突然就去世了，没受什么痛苦。
• My grandmother died suddenly and didn’t suffer.
新概念英语第二册第78课课文
新概念英语第二册第78课课文
摘要：
1.新概念英语第二册第78 课课文概述
2.文章的主要内容和结构
3.文章的核心观点和亮点
正文：
新概念英语第二册第78 课课文是一篇关于人类情感和行为的文章，通过描述一个人在面对困难时的心理变化，揭示了人类在面对压力时的心理机制。
文章主要分为三个部分。
第一部分讲述了一个人在面对困难时的困惑和挫败感。
作者通过描绘这个人的内心独白，生动地展现了他在面对困难时的无助和沮丧。
第二部分讲述了这个人在经历挫败后，如何通过自我调节和激励，逐渐找回信心和勇气。
在这一部分中，作者通过一系列生动的描绘，展示了人类在面对压力时的心理调节过程。
第三部分讲述了这个人在克服困难后，如何从中吸取经验和教训，进一步提升自己。
在这一部分中，作者通过阐述这个人的思考过程，揭示了人类在面对困难时的自我提升机制。
文章的核心观点是，人类在面对困难和压力时，往往会经历困惑、挫败、自我调节和提升等心理过程。
这些过程不仅可以帮助我们克服困难，还可以帮助我们成长和提升。
文章的亮点在于，它通过生动的描绘和深入的分析，揭示了人类在面对困难时的心理机制，为我们提供了理解和应对困难的重要参考。
总的来说，新概念英语第二册第78 课课文是一篇深入浅出的文章，既有丰富的情感描绘，又有深入的心理分析。
新概念英语第二册逐句精讲语言点第78课（2）
Lesson 78 The last one? 最后⼀⽀吗？After reading an article entitled 'Cigarette Smoking and Your Health' I lit a cigarette to calm my nerves. I smoked with concentration and pleasure as I was sure that this would be my last cigarette. For a whole week I did not smoke at all and during this time, my wife suffered terribly. I had all the usual symptoms of someone giving up smoking: a bad temper and an enormous appetite. My friends kept on offering me cigarettes and cigars. They made no effort to hide their amusement whenever I produced a packet of sweets from my pocket. After seven days of this I went to a party. Everybody around me was smoking and I felt extremely uncomfortable. When my old friend Brian urged me to accept a cigarette, it was more than I could bear. I took one guiltily, lit it and smoked with satisfaction. My wife was delighted that things had returned to normal once more. Anyway, as Brian pointed out, it is the easiest thing in the world to give up smoking. He himself has done it lots of times!句⼦讲解：5、My friends kept on offering me cigarettes and cigars.我的朋友们不断地向我递⾹烟和雪茄。
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新概念英语第二册：第78课课文详解及语法解析课文详注 Further notes on the text
1. an article entitled‘Cigarette Smoking and Your Health’,一篇题为《吸烟与健康》的文章。
在英语中，文章名与书名中的每个单词的第一个字母均大写，不在开头位置的连词、冠词、小品词除外。
entitle的含义为“给……题名/定名”，在这里是过去分词(短语)作定语。
entitle常用于被动语态：
The writer hasn't entitled his new book yet.
那位作家还没给他的新书写/取名。
The book was entitled The Sun Also Rises.
那本书的书名为《太阳照样升起》。
2. I had all the usual symptoms of someone giving up smoking： a bad temper
and an enormous appetite. 我具备了戒烟者通常表现出来的所有症状：脾气暴躁和食欲旺盛。
a bad temper and an enormous appetite为symptoms的同位语。
giving up smoking能够看做是someone的定语，即someone who gives up smoking.
3. My friends Kept on offering me cigarettes and cigars.
我的朋友们持续地向我递香烟和雪茄。
keep on doing sth.表示“继续做某事”、“反复做某事”：
The child was crying loudly, but he kept on watching TV.
孩子在大声哭，但他却一直看电视。
He kept on phoning her.
他持续地给她打电话。
4.They made no effort to hide…他们毫不掩饰地……
make no effort表示“根本不作努力”。
我们还能够说：
She wrote the letter with/without effort.
她费力地/毫不费力地写了那封信。
Georeg made every effort to get/at getting the job.
乔治竭尽全力想得到那份工作。
5. …it was more than I could bear. ……我再也忍不住了。
more
than后面跟一个从句或一个形容词时能够表示“超出”(多用于口语)：
He was more than pleased with his new room.
他对自己的新房间极其满意。
This was more than I had expected.
这超出了我的预料。
6.Anyway,as Brian pointed out, it is the easiest thing in the world to give
up smoking.不管怎么说，正如布赖恩指出的那样，戒烟是世界上最容易的事情。
it为先行主语，代替后面的不定式短语to give up…。
point out为固定短语，表示“指出”、“指明”：
Why didn't you point out his mistake to him at that time?
你那时候为什么不向他指出他的错误?
He pointed out that we still had to get a few other things.
他指出我们还需要/得再买一些其他东西。
3.1.1 长方体和正方体的认识
1.填空题。
⑴长方体有（）个面，都是（），其中可能有两个相对的面是相同的（）形，相对的面面积（）。
⑵长方体有（）条棱，相对的棱的长度（）。
⑶长方体有（）个顶点。
⑷正方体有（）个面，都是（）形，它们的面积（）。
⑸正方体有（）条棱，它们的长度（）。
⑹正方体有（）个顶点。
⑺长方体和正方体的相同点是都有（）个面，（）条棱，（）个顶点。
2.判断题。
（对的在括号里打“√”，错的打“╳”）
（1）有6个面、12条棱、8个顶点的物体不是长方体就是正方体。
（）
（2）一张长方形的纸是一个长方体。
（）
（3）相对的棱的长度相等的物体一定是长方体。
（）
（4）长方体和正方体都有6个面。
（）
3.选择题。
（将正确答案的序号填入括号）
⑴一个长方体的长是10厘米，宽是8厘米，高是2厘米，这个长方体的棱长之和是（）厘米。
A.20
B.40
C.60
D.80
⑵一个正方体的棱长是8分米，它的棱长总和是（）分米。
A.48
B.64
C.32
D.96
⑶一个正方体的棱长之和是12a厘米，它的棱长是（）厘米。
A.a
B. 144a
C.
D.12a
4.解决问题。
一个长方体棱长的和是36厘米，它的长和宽都是2厘米，这个长方体的高是多少厘米？
答案：
1、（1）6、长方、正方、相等；（2）1
2、相等（3）8 （4）6、正方、相等（5）12、相等（6）8（7）6、12、8
2、×××√
3、B D A
4、36÷4－2－2＝5（厘米）
3.2.1 长方体和正方体的表面积
1. 填一填。
(1)一个长方体，它的长是2米，宽和高都是0.6米。
它的表面积是()平方米。
(2)一个正方体的棱长是0.4米，这个正方体的表面积是()平方米。
(3)一个正方体的棱长和是36分米，这个正方体的表面积是()平方分米。
(4)一个长方体的长是8厘米，宽是4厘米，高是2厘米。
这个长方体六个面中最大的一个面的面积是()平方厘米，最小的一个面的面积是()平方厘米。
这个长方体的表面积是()平方厘米。
2.一个正方体的棱长的总和是36 cm，它的表面积是多少平方厘米？
3. 一个长方体木箱，长1.2米、宽0.8米、高0.6米，做这个木箱至少要用多少平方米的木板？如果这个木箱无盖呢？
4. 把一个棱长是5分米的正方体木箱的表面涂上油漆，一共需油漆多少克？(每平方分米用漆5克。
)。