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1、A A LessonLesson inin a a LabLab第二课时第二课时学习目标: （1）分数、百分数的正确写法（2）三种表达倍数的句型（3) 修饰比较级的程度副词自主梳理：Step 1、词汇学习重点词汇：expand, contract, electricity, conclusion, partial, ordinary, dissolve, facility, astonished1. expand . contract课文原句：When you heat a metal, it expands. When you heat a metal, it contracts. (Pag
2、e 41)expand 和 contract 是一对反义词。expan d 在本句中的意思是“在面积上扩张、膨胀” ，contract 则表示“（使）缩小，缩短”expand vt. vi. 1. 使变大, 扩大, 扩张, 增强（尺码、数量或重要性）2. 伸展, 伸开, 张开, 展开contract vt. vi 1. 染上(恶习, 疾病等)2. (使)收缩，(使)紧缩；(使)缩短；(使)皱缩2. electricity, electrical, electronic, electricelectric adj. 电的，用电的，电动的electrical adj. 与电有关的，电学的，elec
3、tricity n. 电，电流electronic adj. 电子的，与电子有关的electrician n. 电工3. conclusion n. in conclusion, draw a conclusionconclude，include，contain 的辨义contain 和 include 都有“包含”的意思，contain 可用于表示包含所含之物的的全部 或部分，而 include 则只能用于表示所包含之物中的一部分The parcel included a dictionary. 那包裹里也包括了一本字典。 The parcel contained a dictionary.
4、 那包裹里装的是一本字典。来源:学,科,网 Z,X,X,Kinclude: 包括；包含The health club includes a gym,mming pool , and locker room.contain: 包含，含有，装有来源:学科网The bowl contains a variety of fruit. 碗里装有各种水果。 This bottle contains two glasses of beer. 这个瓶子装了两杯啤洒。来源:Z|xx|k.Com4. ordinary , common, usual, normal, general 的辨析common 常见的，如
5、 common senseusual 经常的ordinary 普通的，平常的normal 正常的来源:学科网 ZXXKgeneral 一般的，普遍的5.dissolve, resolve dissolve 1.（指液体）使（固体）溶解； dissolve (in sth) （指固体）溶解；dissolve sth (in sth) 使（固体）溶解 2. dissolve sth (away) 除去，消除（某固体物质，尤指脏物） 3.dissolve (in sth) 消失，消散 4.(使某事物）终止，结束，解除，解散 resolve 1. (指委员会或集会)表决;作出决定;作出决议2. 解决(
6、问题、疑问.、困难等）3. 分解, 解析(某物)4. 使决意；使下决心6. astonished, astonishing, astonishment7. apparatus, apparentapparent adj. 显然的，表面上的8. metal, model, medal 金属，模范，奖牌9. About experiment: aimapparatus(装备，仪器)methodresultconclusion 10. About apparatus: test tube, tongs, Busen burner, balance, crucible, test tube holde
7、r, cotton wool, 11. About Metal: Potassium(钾)， Sodium（钠） ， Calcium (钙)， Magnesium(镁)， Aluminum（铝） ，Zinc, Iron, Copper重点领悟:Exist as, a mixture of and, electrical equipment, react with, put in order, partial reaction, iron nail, oil layer, addto, First-class scientist, be proud of, be supposed to , La
8、nguage Points1. 倍数的表达法a. A+ times +as+ adj. + as + Bb. A + times + 形容词比较级+ than + Bc. A + times + the size( length, width, height, depth) of + B探究提升：1. The science facilities are very good, with laboratories that have all the latest equipment.2. , as the lecturers are people who have made real disco
9、veries in their area of science.3. In the last twenty years, seven Canadian scientists have won the Nobel Prize.4. Im going to try to go to either Montreal or Ottawa University, as both are supposed to have good Physics Departments. 知识网络：1). as + adj./ adv. + as.The layout of Class Ones wall newspap
10、er is as beautiful as that of Class Threes.as + adj. + a + n. + asThis is as good a dormitory building as the other.as + many / much + n. + as I have as much experience as you in doing the work.2). not as/so + adj./ adv. +asThe bedroom is not as big as the sitting room,2. 比较级的几个句型a. 比较级+ and + 比较级 “
11、 越来越”Winter is coming. Its getting colder and colder.b. the +比较级， the + 比较级 “ 越, 就越”The busier my mum gets, the happier she is. 修饰形容词比较级的副词：a bit, rather, a little, a lot, any, (very) much ( page. 47)Com pare the 5 sentences and find the different usage of the word leave1) Leave the tube for one week. (使 处于某种状态)2) Im leaving Changchun for Beijing tomorrow. (离开)3) There are five minutes left. (剩下)4) Leave it to me. (交给)5) He said that he had left his book in the classroom. (落在某地方)5. used to do (page 49)be used to do , used to do, be used to doingn . 的用法区别来源:学.科.网
