文档库 最新最全的文档下载
当前位置:文档库 › 11.1 学案1(外研版九年级上)

11.1 学案1(外研版九年级上)

11.1 学案1(外研版九年级上)
11.1 学案1(外研版九年级上)

导学目标

1.能够正确使用下列单词和词组:population, crowd, increase, smoke, increasing, along with, minute, percent, appointment, thanks to

2.能记住下列日常用语:Wha t’s next? How about this? It was OK. No idea! I don’t believe it!

自主预习一、汉译英

1.太多的人_______ 2.足够的空间________ 3.太多的车辆、噪音和污染_______

4.最大的城市________ 5.日益增长的人口_________

6.一个环境问题_________ 7.与……一起_________

8.查询一些事实_______ 9.由于________ 10.我真不敢相信__________

二、根据句意及首字母提示完成单词

三、单项选择

1. In the United States, Father’s day falls on _____ third Sunday in ____June.

A. the;/

B. the; a

C. /;the

D. a; /

2. More natural resources should be made use of to meet the _______ need of energy.

A. increasing

B. increased

C. increase

D. are increased

3. The teacher along with the students ______ planting trees.

A. is

B. are

C. be

D. were

4. ______ was the population of Europe in 2000?

A. How much

B. What

C. How

D. How many

5. Ten percent of pupils _____ absent today.

A. are

B. is

C. has

D. have

课堂导学

1.population n. 人口(1) 表示人口“多,少”时用large或small。

China is a country with a large population. 中国是一个人口众多的国家。

(2) 表示某地区的人口时,在population前加the, 作主语时谓语动词用单数。

The population of China is more than 1,300,000,000.

(3) 表示人口数目时,在population前加a。The town has a population of 5,000. 这个城镇有五千人口。

(4) population 前有分数或百分数时,谓语动词用复数形式。

About 11percent of the population of the USA are black people. 大约11﹪的美国人口是黑人。

<易错点>询问人口数字有多少或对人口数字提问时用what。

What’s the population of Shanxi? 山西的人口数是多少?

2.increase v. 增长(1) increase by + 倍数或百分数,表示“增加了……”。The price has increased by 30﹪. 价格增长了百分之三十。

(2) increase to +数字,表示“增长到……”。The population of the city has increased to 200,000这座城市的人口增长到了二十万。

3.percent n. 百分之……,后跟不可数名词或可数名词单数时谓语动词用单数;后跟复数名词时谓语动

词用复数。

About 65 percent of the children play computer games. 大约65﹪的孩子玩电脑游戏。

4.thanks to 意为“由于”。thanks to sb./sth. 意为“由于/多亏了某人/某物”,该短语中thanks 是名词,to 是介词。后跟名词或代词作宾语。

【知识拓展】Thanks for …意为“为……而感谢”,for 是介词,后接名词或动名词。如:

Thank you for inviting me.

当堂达标

一、用方框中所给单词或短语的适当形式填空

1. When the factory closed, she lost her job _______ hundreds of other people.

2. The population of China is about 20 _______ of the world’s population.

3. He won a special ______ for the photo competition.

4. She made an ______ for her son to see the doctor.

5. There are sixty _________ in an hour.

6. What was happening over there? _______ of people poured into the street.

7. There is no ______ without fire.

8. With the ________ population, there won’t be enough space for anyone else.

9. ________ my friend, I could finish the work ahead of time.

10. Countries with large _______ should pay to help the environment.

二、根据汉语完成句子

1.我不知道他住在哪里。I have _______ _________ where he lives.

2.我弟弟的生日即将到来。 My brother’s birthday is _________ _________.

3.我们可伴着音乐一起唱。We can sing ________ __________ the music.

4.昨天我们约定在校门口见面。

We ______ an ________ to meet ________ ______ ____ _______yesterday.

5.“星期六下午玛丽要来这儿。”“我不相信。”

-- Mary is coming here on Saturday afternoon. -- _______ _________ _______ it.

课后提高

一、用所给单词的适当形式或汉语提示填空

二、冠词专练

1.(2012广东) _______greens are preparing the coming Thanksgiving Day.

A. /

B. A

C. An

D. The

2. (2012福州)There is no living thing on ___ moon.

A. the

B. a

C. /

D. an

3. (2012孝感)--Tina, are you going to play ___ chess on School Day?

-- Yes, I’ll also play ____ violin that afternoon.

A. the, the

B. the, /

C. /, the

D. /,/

4. (2012 浙江)Li Na is one of _____ most popular tennis players in China.

A. a

B. an

C. the

D./

5. (2012河北)The children stood in ______________ circle and danced to music.

A. a

B. an

C. the

D. 不填

6.(2012滨州)—Listen! Someone is playing ______ piano.

—Wow! ______beautiful music! I like it very much

A. a; what

B. an; How

C. the; What

D. /; How

7.(2012 恩施自治州)______ girl who will perform at the party tomorrow comes from ______ European country.

A. The;a

B. A;the

C. The;an

二、(2012 天津)根据短文内容及首字母提示填空

外研版九年级上册英语M8U2教案设计

新开口中学英语课堂教学教案 年级九年级学科英语主备人 授课教师备课日期 授课班级授课日期第AcceptAllChangesInDoc XX 周星期 AcceptAllChangesInDoc TT 课题Module8 Unit2 He was invited to competitions aro und the world 课型Reading and writing 课时 1 教材分析Module8的主要内容为运用一般过去时的被动语态来描述自己和他人的运动生活,包括介绍自己喜爱的球队比赛和自己喜爱的一位体育明星。从全书来看,本模块承接上一模块对一般现在时被动语态的学习和运用,着重两类时态的区别使用,让同学们通过课堂活动来掌握其用法。培养学生们对体育活动的热爱。 学情分析学生已经学过与人物有关的语言知识,例如描述人物的外貌特征,描述人物的职业等,所以对于描述人物,学生有一定的语言基础。通过本板块的学习,学生更加可以学习到描述人物的性格特点与事迹,对于描述人物的语言知识,可以说是一个补充完善。 课教 学 目时标能够读懂介绍刘翔的短文,获取主旨大意及相关细节信息。 能够掌握一般过去时被动语态的概念和用法。 能使用一般过去时被动语态写一篇短文介绍乒乓球运动员张怡宁。 通过学习,加深对我国体育运动状况和体育明星的了解,学习运动员顽强拼搏的精神。 教学重难点1、能够读懂介绍刘翔的短文,获取主旨大意及相关细节信息(重点)。 2、能使用一般过去时被动语态写一篇短文介绍乒乓球运动员张怡宁(难点)。 教学方法及手段PWP method, task-based method A tape recorder, multimedia and some pictures 作业布置板书设计 Write a passage about Zhang Yining. Module8 Unit2 He was invited to competitions around the world. set up suffer from first place stop sb. from doing sth. take pride in.

外研版-九年级上册重点语知识点总结大全

外研版-九年级上册-重点语法总结 Module 1 时态复习,到目前为止,我们已经学过了英语中常用的时态,包括一般现在时、一般过去时、现在进行时、过去进行时、一般将来时和现在完成时。在本模块中,我们将对这些时态的用法进行总结。 首先,我们将本模块中出现的有代表性的句子归纳如下: 1.一般现在时 (1)定义: 一般现在时表示经常或习惯性的动作或一般性事实。 (2)用法: ①表示事物或人物的特征、状态。如:The sky is blue.天空是蓝色的。 ②表经常反复性发生的动作。如:I get up at six every day.我每天六点起床。 ③表示客观现实。如:The earth goes around the sun.地球绕着太阳转。 ④表示平日的喜好。I like bananas. We don’t like vegetables. (3)构成: ①be动词:主语+be(am,is,are)+其它。如:I am a boy.我是一个男孩。 ②行为动词:主语+行为动词(+其它)。如:We study English.我们学习英语。 当主语为第三人称单数(he, she,it等)时,动词词尾有所变化。 第三人称单数动词词尾的变化有几种形式: ①一般情况加-s reads, says, takes ②sh、ch、s、x、o结尾的加-es teaches, washes, goes, misses, mixes ③以辅音字母加y结尾的词变y为i再加-es studies, cries, carries 如:Mary likes Chinese.玛丽喜欢汉语。 Miss Gu teaches us English. 顾老师教我们英语。 (4)句式变化: ①be动词的变化。 否定句:主句+be+not+其它。如:He is not a worker.他不是工人。 一般疑问:Be+主语+其它。 如:-Are you a student? -Yes,I am. / No,I’m not. 特殊疑问句:特殊疑问词+一般疑问句。如:Where is my bike? ②行为动词的变化。 否定句:主语+don’t(doesn’t )+动词原形(+其它)。如:I don’t like bread. 当主语为第三人称单数时,要用doesn’t构成否定句。如:He doesn’t often play... 一般疑问句:Do( Does )+主语+动词原形+其它。如:- Do you often play football? - Yes,I do. / No,I don’t. 当主语为第三人称单数时,要用does构成一般疑问句。

最新人教版九年级数学上册全册导学案(含答案)

第二十一章一元二次方程 21.1一元二次方程 1. 了解一元二次方程的概念,应用一元二次方程概念解决一些简单问题. 2.掌握一元二次方程的一般形式ax2+bx+c=0(a≠0)及有关概念. 3.会进行简单的一元二次方程的试解;理解方程解的概念. 重点:一元二次方程的概念及其一般形式;一元二次方程解的探索. 难点:由实际问题列出一元二次方程;准确认识一元二次方程的二次项和系数以及一次项和系数及常数项.

一、自学指导.(10分钟) 问题1: 如图,有一块矩形铁皮,长100 cm,宽50 cm,在它的四角各切去一个同样的正方形,然后将四周突出部分折起,就能制作一个无盖方盒.如果要制作的无盖方盒的底面积为3600 cm2,那么铁皮各角应切去多大的正方形? 分析:设切去的正方形的边长为x cm,则盒底的长为__(100-2x)cm__,宽为__(50-2x)cm__.列方程__(100-2x)·(50-2x)=3600__,化简整理,得__x2-75x+350=0__.①问题2:要组织一次排球邀请赛,参赛的每两个队之间都要比赛一场.根据场地和时间等条件,赛程计划安排7天,每天安排4场比赛,比赛组织者应邀请多少个队参赛? 分析:全部比赛的场数为 设应邀请x个队参赛,个队各赛1场,所以全部比赛共

x (x -1)2__场.列方程__x (x -1) 2 =28__,化简整理,得__x 2-x -56=0__.② 探究: (1)方程①②中未知数的个数各是多少?__1个__. (2)它们最高次数分别是几次?__2次__. 归纳:方程①②的共同特点是:这些方程的两边都是__整式__,只含有__一个__未知数(一元),并且未知数的最高次数是__2__的方程. 1.一元二次方程的定义 等号两边都是__整式__ ,只含有__一__个未知数(一元),并且未知数的最高次数是__2__(二次)的方程,叫做一元二次方程. 2.一元二次方程的一般形式 一般地,任何一个关于x 的一元二次方程,经过整理,都能化成如下形式: ax 2+bx +c =0(a ≠0). 这种形式叫做一元二次方程的一般形式.其中__ax 2__是二次项,__a__是二次项系数,__bx__是一次项,__b__是一次项系数,__c__是常数项. 点拨精讲:二次项系数、一次项系数、常数项都要包含它前面的符号.二次项系数a ≠0是一个重要条件,不能漏掉. 二、自学检测:学生自主完成,小组内展示,点评,教师巡视.(6分钟) 1.判断下列方程,哪些是一元二次方程? (1)x 3-2x 2+5=0; (2)x 2=1; (3)5x 2-2x -14=x 2-2x +35; (4)2(x +1)2=3(x +1); (5)x 2-2x =x 2+1; (6)ax 2+bx +c =0. 解:(2)(3)(4). 点拨精讲:有些含字母系数的方程,尽管分母中含有字母,但只要分母中不含有未知数,这样的方程仍然是整式方程. 2.将方程3x(x -1)=5(x +2)化成一元二次方程的一般形式,并写出其中的二次项系数、一次项系数及常数项. 解:去括号,得3x 2-3x =5x +10.移项,合并同类项,得3x 2-8x -10=0.其中二次项系数是3,一次项系数是-8,常数项是-10.

(完整版)外研版九年级英语下册(课文及对话)

Module 1 Unit One The flight was late. Lingling: Welcome back, everyone! Betty: Hi Lingling! How was your holiday? Lingling: Not bad! I went to Henan Province. But the trip back was very long. The train was full of people, and I had to stand for over six hours. Betty: Bad luck. Where's Tony? Daming: He's staying with his family in the UK, and flying back tomorrow. The flights were late today. Betty: Why is travel so difficult in winter? Lingling: Well, it's the busiest season in China because of Spring Festival. Where did you go, Daming? Daming: We flew to Hong Kong—and the flight was late! But we took the boat to Landau Island and went to Disneyland. Lingling: How about you, Betty? Betty: We had quite a good time in Beijing. We went sightseeing by bus and by taxi. And last weekend, we took a tour by coach to the Summer Palace and went for a long walk. Daming: And now, better get back to work ... We've got exams at the end of the term. Betty: Yes, but there are plenty of fun things to do this term ... the school trip ... Lingling: ... and the school leavers' party ... Daming: ... the visit to the English-speaking theatre in Beijing ... Lingling: And our trip to Los Angeles! We'll have a great time! Unit Two Excuse Me. You're Sitting in My Seat! The train to Beijing! Lin often dreamed about the train, and about going to the capital. Now it was in front of him, to set off soon. He looked at his brother. "Don't forget where you come from, little brother," Jin said. "And watch your bags carefully." Lin nodded, unable to speak. This was his first long trip by train at the start of his new life, leaving his village and his home for the last 16 years. He held Jin in his arms. With tears in his eyes, Jin pushed Lin away. "Go, brother. Write to us as soon as you get there, OK?" Lin jumped onto the train. There were people and bags everywhere. He pushed past them towards his seat. A young man was sitting in Lin's seat. He was wearing jeans and a very smart jacket, and was smoking a cigarette. What should he do? Six pairs of eyes looked at Lin, while the man looked out of the window. "Sir, you're sitting in my seat," Lin said, with a nervous smile. The other people watched with interest. The man didn't turn to look at Lin, but just looked out of the window. "Excuse me. I have a ticket with the number of the seat you're sitting in!" Lin said in a stronger voice. "I also have a ticket with that number—though it is in another car. Besides, I was here first," said the man, without moving his head. Though he was sitting, he looked very tall and strong. Lin looked at the other passengers for help. "But ... " he started to say. "But what?" The man turned and looked at Lin. "I'm not moving." Finally a man wearing glasses spoke in a loud voice. "This young man has the right ticket for that seat. You should move." Lin felt brave. "See? Please move. I've got a long way to go." "How long?" the young man asked. "To the last stop, Beijing." "I'm getting off before you. Then you can have my seat. "

外研版九年级英语上册教案Module 6 Unit 1

Module 6 Problems Unit 1 If I start after dinner, I’ll finish it before I go to bed. 教材分析 This is the first lesson in this module. The listening material is information aboutproblems. It’s a good text to help the students improve their listening strategies, such as getting information from the listening material. 教学目标 【知识目标】 1. Key words: deal, exam, fail, guitar, instrument, musical, habit, volunteer, necessary, shame, instead,

community, knowledge, point, consider 2. Key phrases: get into the habit of, instead of, last word, make a deal with, agree with, fail one’s exams, as soon as 3. Key sentences: (1) If I start after dinner, I’ll finish it before I go to bed. (2) I want you to get into the habit of doing your homework as soon as you come home from school. (3) That’s a shame. (4) That’s not the point. 【能力目标】 1. To understand the dialogue about homework and activities. 2. To talk about problems between students and parents and give advice. 【情感目标】 1. To get into the habit of sharing ideas and learn to ask for help and advice. 2. To understand the dialogue about homework and activity arrangement. 3. To talk about the problems in their daily life and give advice. 教学重难点 【教学重点】 Key sentences: (1) If I start after dinner, I’ll finish it before I go to bed. (2) I want you to get into the habit of doing your homework as soon as you come home from school. (3) That’s a shame. (4) That’s not the point. 【教学难点】 To practice listening and speaking abilities. 课前准备 Multimedia

外研版英语九年级上册知识点总结

外研版英语九年级上册知识点总结 Module 1 Wonders of the world 短语归纳 1.wonders of the world世界奇观 natural wonders 自然奇观man-made wonders 人造奇观 2.join in参加;加入(活动) = take part in 3. I’m not sure. 我不确信 4. agree with sb. 同意某人的看法sb. agree with sth. 某人适应(食物、气候)agree to do sth. 同意做某事agree to sth.(plan /decision/suggestion) 同意/赞成agree on sth.( plan/ ) 在……方面意见一致 5. on the eastern coast of ...在、、、、、、的东海岸 6. in one’s opinion据某人看来;按某人的意见 7. more than = over 多于,超过8. produce electricity 供电 9. millions of 数百万的;数以百万计的 10. would like to do sth. = want to do sth. 想做某事 Would like sb. to do sth. 想要某人做某事 11. early morning 大清早12. become grey变成灰色 13. get out of ...从....出来 14. go through 意为“穿过,强调从物体内部穿过”;从头至尾的练习 15. fall away突然向下倾斜 16. look over 从(某物上面)看过去:仔细检查 look across眺望 look down to 俯视;向下看 17. on top of 在.....顶部18. at the bottom of在.....的底部 19. on both sides在两边20. be famous for意为“以.......而闻名” 21. do an interview做采访do an interview with sb. 采访某人 22. draw a picture of 画一副......的图画23. go down下去;下沉;坠落 24. wait for 等候25. dozens of 许多 26. in height高度;在高度上 用法集萃 1.agree with sb 同意某人agree to do sth 同意做某事 2.would like to do sth 想要做某事 3.in +一段时间在.....(多长时间)之后,常用于回答How soon 的提问 4.have been/gone to 以及have been in的区别 5.because of+名词因为。。。。。 6.without doing sth 没有做某事 7.be afraid of doing sth. / be afraid to do sth. 害怕做某事 8.one of +the +形容词最高级+可数名词复数最......的.....之一 9.look forward to doing sth 盼望做某事 Module 2 Public holidays 短语归纳 1. since then 从那以后 2. have a three-day holiday 有三天的假期 3. public holiday 公众假日 4. have one day off 有一天的休息时间 5. all kinds of 各种各样的 6. take a vacation spend a vacation 度假介词短语:on / for vacation

人教版九年级上册全册导学案

初中化学备课 年度: 学校: 姓名:

重点:能进行给物质加热、洗涤仪器等基本实验操作难点:给物质加热、洗涤仪器 学习过程 一、导入: 1.在实验室里我们通常使用什么仪器对物质进行加热?(个人思考,组内交流) 2.在实验室里(1)哪些常见的仪器可以直接加热,(2)哪些仪器需要垫上石棉 网才能加热,(3)哪些仪器不能加热?(个人思考,组内交流) 二、自主学习; 1.酒精灯的使用方法:用3分钟阅读课本第20页酒精灯的使用方法,归纳 使用酒精灯应注意哪些方面的问题? 使用酒精灯时的注意事项: (1)绝对禁止。 (2)绝对禁止。 (3)向灯里添加酒精时,不能超过酒精灯容积的。 (4)用完酒精灯,必须,不可用嘴去吹。 (5)不要碰倒酒精灯,万一洒出的酒精在桌上燃烧起来,不要惊慌,应立刻。 (6)酒精灯的火焰分为、、。其中温度最高。因此,应用外焰部分进行加热。 【实验1-9】点燃酒精灯,按照课本第21页实验1-9进行实验。 二、讨论交流: 为什么熄灭酒精灯时不能用嘴吹灭? 实验探究:按照课本第21页活动与探究进行实验。 讨论交流:1.加热试管里的液体时,能否将试管口对着人?为什么?2.如果 试管外壁有水的话,能否不擦干直接加热?为什么?3.将液体加热至沸腾的试管,能否立即用冷水冲洗?为什么? 2.物质的加热: 用酒精灯给物质加热时的注意事项:⑴给液体加热可以;给固体加热可以用等。有些仪器如集气瓶、量筒、漏斗等不允许用酒精灯加热。 ⑵如果被加热的玻璃容器外壁有水,应,然后加热,以免容器炸裂。 ⑶加热的时候,不要使玻璃容器的底部跟灯芯接触,也不要离得过远,距离过近或过远都会影响加热效果。烧得很热的玻璃容器,不要,否则可能破裂。也不要直接放在实验台上,以免烫坏实验台。 ⑷给试管里的固体加热,应该先进行。预热的方法是:在火焰上来回移动试管。对已固定的试管,可移动酒精灯。待试管均匀受热后,再把灯焰固定在放固体的部位加热。评价 ⑸给试管里的液体加热,也要进行预热,同时注意液体 体积最好不要超过试管容积的。加热 时,使试管倾斜一定角度(约45度角)。在加热过程中 要不对地移动试管。为避免试管里的液体沸腾喷出伤 人,加热时切不可让。 【观察思考】 观察给固体物质的加热装置,思考下列问题: 【归纳总结】 1.总结给固体物质加热的方法: 2.总结给液体物质加热的方法: 自主学习:用2分钟阅读课本P22-23页洗涤仪器部分,回答下列问题: 1.用完的仪器为什么要洗涤? 2.以试管为例,说明如何洗涤仪器? 3.仪器洗涤干净的标志是什么? 自主学习:用2分钟阅读课本P152-153页内容,回答下列问题 1、托盘天平的使用方法: 2、常见仪器的连接有哪些? 讨论交流:在称量药品时不慎将药品放在右盘,砝码放在左盘,会造成怎样 的结果? 课堂小结: 学科:化学主备:审核:执教老师: 班级:九()学习小组:()学生姓名: 课题:课题1 物质的变化和性质(课时1)课型: 学习 目标: 1.了解物理变化和化学变化的概念及区别,并能运用概念判断一些易分辨的典 型的物理变化和化学变化; 2.认识化学变化的基本特征,理解反应现象和本质的联系。 重点:物理变化和化学变化的概念与判断。 玻璃仪器的洗涤 化学实验 基本操作 物质的加热 仪器的连接 仪器:酒精灯 方法: 方法: 洗涤干净的标准 1.对于已经固定的试管,怎样进行预热? 2.试管口为什么要略微向下倾

外研版九年级上册英语全册教案

西塔庄初级中学英语学科教案 (2014——2015)年度第一学期 年级:九年级 学科:英语 姓名:张雪艳 时间2014年9月 Module 1 Wonders of the world Unit 1 What is a wonder of the world? 教学设计 课型Listening and speaking 教材分析This unit aims to review the learnt tenses so far and help students to be able to present some important and creative ideas about writing a school magazine. 教学目标To learn and understand the topic words through talking and listening. To know something about the pyramids and the Grand Canyon. To understand the conversation about starting a school magazine involving different tenses.

知识与能力 1. Vocabulary and expressions: ancient, club, composition, pupil, meeting, call, event, listen up. That’s news to me. Anyone else? 2. To enable the Ss to express in different tenses according to the set situations. 3. To learn to give ideas on writing a school magazine. 过程与方法 1. Top-down approach, enabling Ss to understand and talk about writing a school magazine. 2. To learn by listening, speaking and discussing. 情感、态度与价值观To help students enlarge their vision on wonders of the world and help to know more about writing a school magazine of their own. 教学过程 教学步骤教师活动学生活动活动目的 Step 1 Lead-in Start the lesson by showing groups of pictures about the wonders of the world on the screen including the ancient pyramids. Ask students to talk about the picture on Page 2. T: Where can you see the pictures and the brief introduction probably? (Newspaper / the Internet / Magazine…) T: Yes, magazines like Crazy English / National Geography… Who started…? Learn the new vocabulary. (ancient, pyramid, review, wonder…) Have a talk about the picture using the words in Activity 1. Learn a bit about magazines. Get the Ss to be attentive and focus on the theme of the lesson. (Magazine) Step 2 Listening & Vocabulary Play the tape and check the words. Listen to the tape again. Make up possible questions according to the answers. Give examples. Listen and check the words. Make up questions according to the given answers. ( Wh-questions) Practise listening and get specific information. Check their understanding by making questions. Step 3. Listen & read Play the tape for the 1st time. Ask Ss questions. T: What are the children doing? Is there a school magazine in Da Ming’s school? Listen to the tape and get the answers. Listen to get a general idea for the 1st time. Play the tape again and ask students to decide T OR F. ① Crazy feet is a band. ② Becky Wang started a school magazine. ③ Da Ming watched the interview on TV yesterday ④ Tony is writing a composition. Listen more carefully for the 2nd time. Decide whether they are true or false. Check the answers with the class. Listen for the specific information and understand the details of the conversation.

最新人教版初中九年级数学上册《一元二次方程》导学案

第二十一章一元二次方程 21.1一元二次方程 ——一元二次方程的相关概念 一、新课导入 1.导入课题: 情景:要设计一座高2m的人体雕像,使它的上部(腰以上)与下部(腰以下)的高度比等于下部与全部(全身)的高度比,则雕像的下部应设计多少米高? 问题1:列方程解应用题的一般步骤是什么?(导出审题的关键是寻找等量关系) 问题2:你能画出示意图表示这个问题吗?(用线段AB表示雕像的高度,雕像上部的高度表示为AC,下部的高度表示为BC,在黑板上画出示意图,把这个问题转化为数学问题) 问题3:能反映问题的等量关系的是哪一句话?(根据题意导出关系式 BC2=2AC) 问题4:设雕像下部高BC=x m,请说出你所列的方程,并化简.这个方程是一元一次方程吗?它有什么特点? 这个方程就是本节课我们将要学习的一元二次方程.(板书课题) 2.学习目标: (1)会设未知数,列一元二次方程. (2)了解一元二次方程及其根的概念. (3)能熟练地把一元二次方程化成一般形式,并准确地指出各项系数. 3.学习重、难点: 重点:一元二次方程的一般形式及相关概念. 难点:寻找等量关系. 二、分层学习 1.自学指导: (1)自学内容:教材第1页到第2页的问题1、问题2. (2)自学时间:5分钟. (3)自学方法:先寻找问题中的等量关系,再根据等量关系列出方程.

(4)自学参考提纲: ①问题1中,要制作一个无盖的方盒,四角都要剪去一个相同的正方形,我们设正方形边长为x cm,则盒底的宽为(50-2x) cm,盒底的长为(100-2x) cm,根据矩形的面积公式及方盒的底面积3600 cm2可列方程为(100-2x)(50-2x)=3600,你能把它整理为课本上的方程②吗?试说明具体经过哪几步变形得到. 先去括号5000-100x-200x+4x2=3600 移项合并同类项4x2-300x+1400=0 系数化为1(两边同除以4) x2-75x+350=0 ②问题2中,本次排球比赛的总比赛场数为28场. 设邀请x支队参赛,则每支队与其余(x-1) 支队都要赛一场. 整个比赛中总比赛场数是多少?你是怎样算出来的? 本题的等量关系是什么?你列出的方程是x(x-1)=28. 你能把它整理为课本上的方程③吗?试说明具体经过哪几步变形得到. 去括号x2-12x=28 系数化为1(两边同乘以2) x2-x=56 2.自学:学生可参考自学指导进行自学. 3.助学: (1)师助生: ①明了学情:观察了解学生是否会寻找等量关系,是否会化简方程. ②差异指导:简要说明问题2中单循环比赛与双循环比赛的区别,对不会寻找等量关系的学生给予辅导,说明化简方程的基本要求. (2)生助生:同桌之间、小组内交流、研讨. 4.强化: (1)总结寻找等量关系的策略,简要指出哪些公式经常被我们作为寻找等量关系的依据. (2)练习:根据下列问题列方程 ①一个圆的面积是2πm2,求半径.πr2=2π ②一个直角三角形的两条直角边相差3cm,面积为9cm2,求较长的直角边的长. 1 x(x-3)=9 2

外研社九年级下册英语教材中文打印版

九下英语单词汉语练习 M1血,血液n. 航班,飞行n.M5 因为,由于赶上 径直地,直接地adv.协议,协定n. 飞行员n.失明的,瞎的adj. 成功,做成v.哎呦int. 只要取消,决定终止【英】毕业生n.多亏,归功于 确切地,完全adv.医疗保健 多保重预料,估计v. 先生,长官n.需要v. 军官,官员,警察n.身体的,体力的adj.笨的,糊涂的adj.力气,精力n. 脱去偶尔,有时,间或 短上衣,夹克n.损害,伤害v. M2M6 我们的pron.邀请,请柬n. 领带n.日历,历书n. 一排,一行,一列n.气球n. 水池,游泳池n.绘画v. 及格,通过v.使变热,给…加热v.中等的,次要的,间接的adj.使变热,给…加热 中学餐刀,刀具n. Pl(复数) 缺席的,不在的adj.餐叉n. 钟,铃n.匙,勺子n. M3干酪汉堡包n, 富有的,富裕的adj.意大利的adj. 意大利语n. 担心,害怕n.西方人n. 过去aux.西方n. 财富,财产n.端上,服饰….进餐v. 相似的adj. 使加倍,把……增加一倍v. 双的,两个adj. 很少地,不常adv.翅膀,翼n. 空余的,备用的adj.女士,夫人,小姐n.业余时间,闲暇先生,男士n. 大点声说随便做吧,请自便

聋的adj.生气的adj. 微小的,极小的adj.M7 用电的,电动的adj.成功,实现v. 电灯n.包括,包含prep. 蜡烛n.说某种语言的人n. 邮递员n.老板,上司n. 寒冷,冷空气n.秘书n. 高温,热度n.四分之一n. 专职的,全日制的adj.制造业,工业n. 作用,职责,角色n.零n. 教育,学业n.印度人n. 印度的adj. 运输业,交通n.种,类,类型n. M4M8 动身,出发小提包n. 短袜n.节拍,拍子n. 每当,无论什么时候conj.对不起,请原谅int. 合适的,恰当的adj.计划,打算v. 边,边缘n.取来,拿来v. 你自己pron.薄烤饼,薄煎饼n. 离开玫瑰,蔷薇n. 挨饿,饿死v.嘲笑,对…一笑置之 尝试,努力n.善举,好意n. 一口气,一下子放弃 岩,岩石n.尽某人最大的努力 攀岩失望的,沮丧的adj. 石头n.床边,床头n. 相当,还算adv.短笺,便条n. 无困难的,顺利的,光滑的,平坦的adj.…的人,那个人,那些人pron.直的,笔直的adj. 帐篷n. 变成,进入v. 入睡,睡着 悬挂,吊v. 枪n. 软的,柔软的adj. 静止的,不动的adj. 树林,林地n.

外研版英语九年级上册 Module 9 Unit 1 教案

Module 9 Great inventions Unit 1 Will computers be used more than books in the future? 教学目标 【知识目标】 1.词汇website, mail, page, electronic, full, fix, memory, instruction, lend, properly 2.一般将来时的被动语态 3.一般现在时、一般过去时及一般将来时的被动语态用法总结 【能力目标】 能听懂有关发明及其应用的文章,并能使用被动语态谈论某种物品发明的时间、发明人及用途;能运用被动语态描写自己最喜爱的发明物。 【情感态度目标】 培养发明创造精神,从而进一步认识世界和改造世界。 教学重难点 【教学重点】 1.领会并灵活使用下列词汇 website,mail,page,electronic,full,fix,memory,instruction, lend, properly 2.一般将来时的被动语态及其各种句式 【教学难点】 能听懂有关发明及其应用的文章,并能使用各个时态的被动语态谈论某种物品发明的时间、发明人及用途。

教学过程 Step 1 Leading-in Ss look the pictures and answer the questions. Step 2 Presentation Look and say. The teacher shows the pictures of new words and let the students to sayas soon as possible. Step 3 Look and say Look at the pictures and answer the questions in pairs. 1. How have these inventions changed people’s lives? 2. Which one do you think is the most important? 3. What other important inventions can you think of? Step 4 Listening 1. Listen and complete the sentences. 1 Linging loves her mobile phone because she can ______________. 2All of Daming’s friends’ numbers are _______ in his phone. 3Today’s cameras are better than old cameras because they do not ________ andthe photos can ______________. 4 Linglingthinkseverything___________bycomputertosomedegree,sothecomputer is __________________ invention. 2. Listen to Part 3 and answer the following questions. 1. What will Tony do on the school visit to the museum? 2. Where did we get mainly information in the past?

新外研版英语九年级上册知识点总结

最新外研版英语九年级上册知识点总结 Module 1 Wonders of the world 短语归纳 1.wonders of the world世界奇观 natural wonders 自然奇观man-made wonders 人造奇观 2.join in参加;加入(活动) = take part in 3. I’m not sure. 我不确信 4. agree with sb. 同意某人的看法sb. agree with sth. 某人适应(食物、气候)agree to do sth. 同意做某事agree to sth.(plan /decision/suggestion) 同意/赞成agree on sth.( plan/ ) 在……方面意见一致 5. on the eastern coast of ...在、、、、、、的东海岸 6. in one’s opinion据某人看来;按某人的意见 7. more than = over 多于,超过8. produce electricity 供电 9. millions of 数百万的;数以百万计的 10. would like to do sth. = want to do sth. 想做某事 Would like sb. to do sth. 想要某人做某事 11. early morning 大清早12. become grey变成灰色 13. get out of ...从....出来 14. go through 意为“穿过,强调从物体内部穿过”;从头至尾的练习 15. fall away突然向下倾斜 16. look over 从(某物上面)看过去:仔细检查 look across眺望 look down to 俯视;向下看 17. on top of 在.....顶部18. at the bottom of在.....的底部 19. on both sides在两边20. be famous for意为“以.......而闻名” 21. do an interview做采访do an interview with sb. 采访某人 22. draw a picture of 画一副......的图画23. go down下去;下沉;坠落 24. wait for 等候25. dozens of 许多 26. in height高度;在高度上 用法集萃 1.agree with sb 同意某人agree to do sth 同意做某事 2.would like to do sth 想要做某事 3.in +一段时间在.....(多长时间)之后,常用于回答How soon 的提问 4.have been/gone to 以及have been in的区别 5.because of+名词因为。。。。。 6.without doing sth 没有做某事 7.be afraid of doing sth. / be afraid to do sth. 害怕做某事

相关文档
相关文档 最新文档