1、Unit2 Topic3 SectionB 精品学案教学目标：1. 掌握四会词：acid, nuclear, biogas, technology, straw, renewable, disadvantage , process, require, maglev, German, wheel, guide, steel, sunlight, steam, , electric, best-know, per, efficient, path, wave, deep ,source, worldwide, run out.2. 综合复习所学环保词汇用法及表达自我观点与建议的句型。3. 了解现代
2、科学技术在环境保护方面的作用。 教学重点：1.环保词汇的用法及表达自我观点与建议的句子。 2. 本节的短语和词组。教学难点：.环保词汇的用法及表达自我观点与建议的句子。课前预习：1.预习本课的生词和短语，并背熟2. 中英互译。发电 _ nuclear energy _ biogas technology _ 主要的优势 _ 20世纪90年代_ 在不久的将来_acid rain _ the best- known _ up to 30 days _ 最高时速是431千米每小时_ 耗尽，用完 _maglev train _ renewable sources _ 被用做_3. 预读1a，回答以下问
3、题。1). Why isnt coal a good material?2). What is the disadvantage of using nuclear power?3). What do you think of electric cars?4). What do you think of the maglev train?4.再读1a，根据文章的描述将文中的图片编号填在相应的段落前， 然后根据文章内容完成1b 和1c.5. 阅读2a的 文章，根据文章的内容将下列的句子编号填在相应的图片下面。6.预习指导：1).nuclear energy 核能。2).biogas technol
4、ogy沼气。3).acid rain 酸雨。4). electric 电动的，用电的。5). reach/ achieve a top speed of+具体速度 达到某种程度。 at a speed of+具体速度 “以某种速度”。 at top speed= at full speed 以全速。 at (a) high speed 以高速，反义：at (a) low speed 以低速。教学过程：预习展示：1.Check if the students can read the new words and phrases, pay attention to their pronunciat
5、ion.2.Answer the questions of prat3 in the section of preview.3.Read 1a, finish 1b and 1c.4.In groups read 1a together and then ask several students to show their other students.检测训练:1. 用连词but and however 或 while填空。 1). Its raining hard; _, he keeps on working in the field. 2). Li lei can solve the
6、problem, _I cant. 3).Coal is very dirty _ it is very dangerous because it causes “acid rain”. 4).The water trains in Wale use water to push one train down a hill _ they use water to pull another train up the hill. 5). Kangkang can solve the problem, _ I cant.2. 选择题 ( ) 1. Its kind _ you to help me w
7、ith my English. A . for B. of C. to ( ) 2. We _ take good care of the environment. A. suppose B. suppose to C. are supposed to ( ) 3. Its getting dark _they are still working. A. and B. but C. or ( ) 4.Take more exercise_ you will be healthier. A.but B . or C. so ( ) 5. Call a taxi _you will miss the train. A. though B. and C. or 3. 完成句子 1). 许多学生骑自行车上学。 _ _ _students go to school by bike. 2). 这些花闻起来很甜。 The flowers _ sweet. 3) 昨晚他花了一小时做作业。 It_ him one hour _ _his homework. 4). 保护环境和发展经济同样重要。 _ _is as important as developing economy
