第一篇:中职教案
Unit10 What’s the Weather Like?
the First Period
第1课时
Topic:New words of Unit 10 Aims and Demands:
1.Let the Ss listen and read the new words.2.Explain and use the main knowledge.Type of Lesson:New one Teaching Methods:Teaching and practicing Teaching Procedures:
(一)Organization
(二)Act out the dialogues
(三)Leading:
(四)New Content:
Step 1 Listen to the recording and read after it.Step 2 Let the Ss read the new words one by one.Step 3 Read new words after the teacher.Step 4(1)Explain some main words and how to use them.(2)Play a game in groups.Step 5:
Ask the students to sum up what you have learnt in this class.Step 6:
Today’s homework.Step 7 :
Self of examination.the Second Period
第2课时 Topic:listen and Speak : Task 1 Aims and Demands:
1.Master some new words and phrases on the weather.2.Practise listening on the weather all over the world.Keys and Difficulties:Master some main words ans phrases on the weather.Type of Lesson:new one Teaching Methods:listen and speak Teaching Procedures: 一.Organization
二.Revision and Questions:Warm-up 三.Leading: 四.New Content Listen and speak Task 1 Step 1
Ask the students to brain storm as many words related to the weather as possible.Write them in the boxes.Teachers may help students to find out different ways of saying temperature.More boxes be added.(小组合作交流、探讨,写出一些与天气有关的单词与短语)Step 2
Ask the students to write the sentences in the spaces given.(创设有关各种天气的教学情境,让学生身临其境,更好的掌握一些天气术语)Step3
Help stuendts learn to recognize temperature using Centigrade and Fahrenheit.Also note that the expression_r_rs of describing the weather are different with different degrees of the temperature.Step 4
Ask the students to work in groups to fill in th blanks in the statements.The illustration of the thermometer can help with the calculation.(小组合作填空)Step 5
Tell the students that they are going to listen to a report on weather around the world.While listening,they should try to complete the information in the table.五.Consolidation 六.Sum Up
What do you learn this class? 七.Homework
八.Self of Examination
the Third Period
第3课时
Topic:Read and Write: Task 1 Aims and Demands: 1.Read the passage.2.Answer the questions according the passage on the book.Keys And Difficulties:Under the passage.Type of Lesson:new one Teaching Methods:Read and write Teaching Procedures: 一.Organization
二.Revision and Questions:Warm-up 三.Leading: 四.New Content Read and Write: Task 1 Step 1
Teacher may ask the following questions to the whole class.(小组合作交流、探讨,回答老师提出的问题)(模拟实验,填空)Step 2
Ask the students to read the text and do the tasks that follow.Step3
Understanding the passage.Answer the following questions: 1)Why do people in the West like to talk about the weather? 2)What does the phrase ?“break the ice”mean in the passage? 3)What does the sentence “I can’t stand it”mean in the passage? Step 4
Write appropriate comments about the weather for the following picture.(小组合作填空)Step 5
In what ways is the weather in the U.S.different from the weather in Britain? Complete the following information chart.五.Consolidation(1)Do actions and guess.(2)Describe the picture in groups.六.Sum Up 七.Homework
八.Self of Examination
the Fourth Period
第4课时
Topic:listen and Speak : Task 2 Aims and Demands:
1.Master some new words and phrases on the weather.2.Practise listening on the weather all over the world.Keys and Difficulties:Master some main words ans phrases on the weather.Type of Lesson:new one Teaching Methods:listen and speak Teaching Procedures: 一.Organization
二.Revision and Questions:Warm-up 三.Leading: 四.New Content Listen and speak Task 2 Step 1
To prepare students for this task,the teacher can ask them to listen to some sentences that will appear in the listening passage.They are given in the Get Ready box.Step 2
Now ask the students to read down the names for areas in the map.Remind the students that in the recording,they will hear the weather forecast for only some of the areas in the map.Then ask the students to listen to the recording and fill out the information according to what they hear form the tape.Notes: 1.drop by 10 degreesdrop to 10 degree 2.high winds Step3
Ask students to name some of the major cities in China and then ask them to mark them out on the map.Then students can work in groups and prepare a weather report for the major cities in China.Help students learn to describe the location of the cities(in the north,south,east,west part of the country).五.Consolidation Make dialogues according to the pictures.六.Sum Up
What do you learn this class together.七.Homework
八.Self of Examination
the Fifth Period
第5课时
Topic:Read and Write:Task 2 Aims and Demands: 1.Read the passage.2.Answer the questions according the passage on the book.Keys and Difficulties:Understand the passage.Type of Lesson:new one Teaching Methods:Read and write Teaching Procedures: 一.Organization
二.Revision and Questions:Warm-up 三.Leading: 四.New Content Read and Write:Task 2 Step 1
Use the questions as a warm up activity to find ut what the students already know about Thailand.1.Do you know where Thainland? 2.What else do you know about Thailand?(小组合作交流、探讨)Step 2
Let the students read the passage alone.Step 3
Listen to the tape and read after it.Step 4
Read and translate the passage.Step 5 Group discussion.Students should be encouraged to express their opinions.There’s no right or wrong answers.Help students to make use of the information from the text in their opinions.1.In which season would like to travel to Thailand for a holiday?Why? 2.Can you name a few things about having a holiday in the rainy season in Thailand?(小组讨论)Step6
Ask the students to work in pairs to talk about the climate in their areas.Make sure that the students first have some questions to ask.五.Consolidation
Act out the dialogue.六.Sum Up 七.Homework
八.Self of Examination
the Sixth Period
第6课时
Topic:Grammar Aims and Demands:
1.Master the usage of the prep.2.Practise using the prep.Keys and Difficulties:Use skillfully.Type of Lesson:new one Teaching Methods:Teach and practice.Teaching Procedures: 一.Organization
二.Revision and Questions:Warm-up 三.Leading:Ask the students to make sentences.四.New Content Grammaer Step 1
Ask the students to read the explanation on the book and summarize the usage of the grammar.(小组合作交流、探讨)Step 2 I.atinon II.duringforsince Step3
Let the students make sentences.五.Consolidation Play the games 六.Sum Up
What have you learnt in this class? 七.Homework
八.Self of Examination
第二篇:中职教案10
1、课次:10
2、授课方式:习题课
3、课时安排:2
4、授课题目:机械工程材料
5、教学目的:掌握本章所学的基本知识。
6、教学重点及难点:本章重点及难点
7、方法及手段:举例讲解
8、教学基本内容
第四章
机械工程材料
一、填空题
1.钢是含碳量()的铁碳合金。钢中含有少量的(),其中()是有害元素。2.合金结构钢按用途分为()和(),其中()主要为普通质量钢。3.刃具钢有()、()和()
三大类,其中()适用于制造切削速度较高的刃具。
4.铸铁可分为()、()和()。三种铸铁中()力学性能最好。5.钢的普通热处理有()()()和()。
如果热处理的目的是降低工件硬度、改善切削性能,应
采用()或()。
6.生产轴类零件要选用碳含量()的钢,此类
钢称为()钢。轴类零件使用的热处理为(),热处理后的性能特点是()。7.形变铝合金按性能、用途分为()、()、()和(),生产形状复杂的锻件()。8.黄铜是以()为主加元素的铜合金。H70表示铜含
量为()、锌含量为()的黄铜。
二、选择题
1.Q215–B.F是一种()质量的钢。
A.普通 B.优质 C.高质优质 2.渗碳钢属于()钢。
A.低碳 B.中碳 C.高碳
3.9SiCr的碳含量为()。
A.0.09% B.0.9% C.9% 4.制造弹簧用()钢。
A.20 B.45 C.65 5.刃具要求高硬度、耐磨,因此用()钢制造。A.低碳 B.中碳 C.高碳 6.要求高硬度的零件,淬火后需()回火。A.低温 B.中温 C.高温 7.下列钢中()钢适合于制造轴。A.08 B.45 C.T7 8.制造切削速度较高的刃具选用下列钢中()钢。A.T13A B.9SiCr C.W18Cr4V 9.青铜是铜与()元素的合金。
A.Zn B.Ni C.Zn、Ni以外
三、判断题
1.滚珠轴承钢有高的碳含量,它属于结构钢。(2.50CrVA是一种高级优质的低合金刃具钢。(3.轴类零件适合用中碳钢制造,在调质状态下使用。(4.09MnV是碳含量为0.9%的普通低合金结构钢。())))5.弹簧类零件在淬火+中温回火条件下使用。()6.LF11是适用于制造高强度结构件的铝合金。()7.ZL102是铝 – 硅系制造铝合金。()8.球墨铸铁是力学性能最好的铸铁。()
四、简答题
1.说明下列符号的含义
Q235–C.F LY12 HPb59–1 HT150 2.说明下列钢的碳含量及合金元素含量 9SiCr 45 60Si2Mn T8 08 3.与碳素钢相比,合金钢有什么优点?
4.铝合金有什么性能特点?形变铝合金怎么分类?
第三篇:中职教案9
1、课次:9
2、授课方式:理论课
3、课时安排:2
4、授课题目:有色金属材料
5、教学目的:了解纯铜的特点及应用,掌握铜合金的种类,性能,牌号及用途。
6、教学重点及难点:铜合金的性能、用途。
7、方法及手段:举例讲解
8、教学基本内容
§4-3 有色金属材料
二、铜及铜合金
1.纯铜
特性:(1)导电,导热性好;
(2)抗大气腐蚀性能好;
(3)塑性好,但强度,硬度低。
用途:纯铜用于制成电线、电缆、铜管及配制铜合金。
2.铜合金
(1)黄铜(以锌为主加元素的铜合金)① 普通黄铜
由铜和锌组成的铜合金。
牌号:H90、H68等
性能:良好的塑性、耐蚀性,适当的强度,适合于冷、热变形加工。
用途:主要用于制造装饰品、奖章、散热器、弹壳、螺栓、轴套等。
②特殊黄铜
在普通黄铜中加入其它合金元素所组成的铜合金。
常加入的元素有:锡、铅、硅、铁等。
牌号:HSn62—
1、HPb59—1等
性能:良好的耐蚀性和切削加工性,较高的强度和硬度。
用途:常用于制造船舶零件,如海轮的螺旋桨、管配件、螺钉、螺母、销、轴套等。
(2)白铜(铜和镍的合金)
性能:耐蚀性好。
用途:重要用于制造精密仪器、仪表中的耐蚀零件及电阻器、热电偶等。
(3)青铜(除了黄铜和白铜以外的铜合金)① 普通青铜
由铜和锡组成的铜合金。(锡青铜)
牌号: QSn4–
3、ZQSn10–1等
性能:具有耐磨、耐蚀性,良好的铸造性能。
用途:主要用于制造弹性元件、管配件、接触件及蜗轮、套筒等。② 特殊青铜
不含锡的青铜。(铝青铜、铍青铜等)
性能:与锡青铜比较,耐磨、耐蚀性提高,铸造性能下降。
用途:常用于制造齿轮、轴承等。
9、课程小结:
掌握
1、铜合金的种类,2、黄铜的牌号,3、黄铜、青铜的主要用途。
10、作业:
4-63
4-68
第四篇:中职教案4
机械基础 课程教案
1、课次: 4
2、授课方式:理论课
3、课时安排:2
4、授课题目:钢铁材料
5、教学目的:掌握铸铁的分类、牌号、性能及用途,能根据实际选择
材料;了解铸钢的性能及用途。
6、教学重点及难点:铸铁牌号识别及材料选择
7、方法及手段:举例讲解
8、教学基本内容
§4-1 钢铁材料
二、铸铁与铸钢 1.铸铁
含碳量大于2.11%的铁碳合金。
成分:C:2.5%~4%、Si:0.8%~3%、Mn、S、P均比钢含量高。性能:具有良好的铸造性,耐磨性,减抗性和切削加工性,生产简
单,价格便宜。
分类:(1)灰铸铁(2)球墨铸铁(3)可锻铸铁(1)灰铸铁
牌号:HT150 ~ HT350 用途:用于制造机床床身、导轨、箱体、缸体等。注1 由于石墨的存在,使灰铸铁的力学性能低于碳钢。
(2)可锻铸铁
牌号:KTH300 – 06、KTZ450 – 06等
性能:与灰铸铁相比,可锻铸铁的力学性能均有提高。
用途:用于制造汽车前后轮壳,管接头,三通等。
注2 可锻铸铁并不可以锻造,只能铸造成形。(3)球墨铸铁 牌号:QT400 –
18、QT700 – 2等
性能:比灰铸铁、可锻铸铁的力学性能都高,兼有铸铁和钢的优点。
用途:可代替钢制造受力复杂,制造力学性能、耐磨性要求较高的 零件。如:柴油机曲轴、减速像齿轮、轧钢机轧辊等。
2.铸钢
熔炼好的钢液浇注成毛坯或零件称为铸钢件
分类:(1)碳素铸钢(2)合金铸钢
性能:与铸铁相比,铸钢的力学性能较高。
用途:用于制造形状复杂,综合力学性能要求高的零件 注3 铸钢件一般需采用热处理,以改善其力学性能。
9、课程小结:
(一)铸铁的成分、性能、分类及用途。
(二)铸钢与钢、铸铁的区别。
10、作业:
P38 4-32 4-38
第五篇:中职教案3
1、课次: 3
2、授课方式:理论课
3、课时安排:2
4、授课题目:钢铁材料
5、教学目的:掌握合金工具钢的牌号,能根据用途正确选用钢的材料。
6、教学重点及难点:合金工具钢的牌号识别及材料选择。
7、方法及手段:举例讲解
8、教学基本内容
§4-1 钢铁材料 2.合金工具钢(1)合金刃具钢
① 低合金刃具钢
在碳素工具钢中加入少量合金元素(一般为:3%~5%)形成的钢。
热处理: 淬火+ 低温回火 牌号: 9SiCr、CrWMn等
用途: 用于制造丝锥、板牙、铰刀等低速切削刃具。② 高速钢
在碳素工具钢中加入Cr、W、Mo、V等多种合金元素(总量为: 10%~25%)形成的钢。
热处理:淬火(一至二次预热)+ 高温回火(二至三次)
牌号: W18Cr4V等
用途: 用于制造车刀、钻头、形状复杂成形铣刀高速切削刀具、模具及耐磨零件等。(2)合金模具钢
用于制造冲压、热锻、压铸等成形模具的钢。
① 冷模具钢
用于制造使金属在冷态下变形的模具。
热处理: 淬火+ 低温回火
牌号:T10、T12A、9SiCr、CrWMn等(尺寸小)Cr12、Cr12MoV等(大尺寸)
用途:制造冷冲模、冷挤压模、拉丝模等。
② 热模具钢
用于制造使金属在高温下变形的模具。
热处理: 淬火+ 中温回火
牌号:5CrMnMo、3Cr2W8等
用途:制造热锻模、热挤压模、热铸模等。
③ 合金量具钢
用于制造测量工件尺寸的工具的钢。(非专用钢)
精度要求高的量具: 采用 CrWMn、GCr15等;
精度要求一般的量具:采用 T10A、T12等。
9、课程小结:
(一)低合金刃具钢与高速钢的成分、性能及用途等区别。
(二)合金工具钢的牌号识别及用途。
10、作业: P16 4-16 ~ 4-20