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Section Introduction & Reading and Vocabulary,Step One：Warming up,Do you like doing scientific experiments? What should you pay attention to when you are carrying out an experiment in a lab? _ _ 答案： Carrying out an experiment in a lab is very dangerous.You must be careful and do the experiment under your teachers guidance.,Step Two：Fast reading Read the two passages (P4445) quickly and answer the following questions. 1What should we know when we use metals? _ 答案： We should know how metals react with different substances.,2What will happen to copper when it is kept in water? _ 答案： No reaction /Nothing.,3Why is oil added to the water? _ 答案： To keep air out of the water.,4What is the use of the cotton wool in the test tube? _ 答案： Keeping air dry.,Step Three：Careful reading Read the text (P4445) carefully and choose the best answers. 1Which of the following metals reacts most with water? ACopper. BIron. CAluminium. DSodium. 答案： D,2According to Passage A，which of the following reacts most easily when it is heated in oxygen? AAluminium. BIron. CSteel. DCopper. 答案： A,3We can know from the experiment_. Ahow iron rusts with oil Biron is quite easy to rust Chow we can prevent iron from rusting Dhow iron reacts with all the other substances 答案： C,4If some clean iron nails are kept in a wet place for a week，the nails will_. Arust Bnot rust Cform an oxide Dkeep the place dry 答案： A,5This passage mainly talks about _. Aall kinds of metals Bwhat kind of metal reacts most Cthe different reactions of metals Dhow metals react 答案： C,Step Four：Summary Different metals have different uses.When we use metals，it is important to know how they react with different 1._.The 2._of metals with these substances can be put in order.From the table，we can find potassium reacts the most with oxygen and water while copper 3._react with water.When we heat calcium in oxygen，it burns to 4._an oxide.,To find out if iron rusts in dry air，in airfree water and in 5._water.Lets do a simple scientific experiment.We need different pieces of 6._，which are clean iron nails，test tubes，a test tube holder，some cotton wool，oil and a Bunsen burner.,Well，first，put some iron nails at the 7._of a test tube.Then push some cotton wool down the tube.Next，leave the tube for one week.After one week，the nails have not 8._.It shows that iron doesnt rust when the air is dry.,In the second part of the experiment，you must boil the water to make sure there is no air in it.You add some oil to the water because this 9._air out of it.It also shows that iron does not rust in water without air in it.10._，the nails rust in the tube with ordinary water in the third part of the experiment. That is how iron reacts with air and with water.,答案： 1.substances 2.reaction 3.doesnt 4.form 5ordinary 6.equipment 7.bottom 8.rusted 9.keeps 10However,expand v膨胀；扩大，扩张 (课文原句P41)When you heat a metal，it expands. 当你加热一种金属的时候，它会膨胀。 Student numbers are expanding rapidly. 学生人数在迅速增加。,Air expands when heated.空气受热膨胀。 The writer expanded his short novel into a long one. 那位作者把他的短篇小说扩展为长篇。 His company expanded into a big one. 他的公司扩大规模而成为大公司。,1.McDonalds has_its business by opening more stores in big cities. Aexpanded Bspread Cincreased Dimproved 解析： expand ones business扩大生意。 答案： A,stage nC 阶段，时期；舞台 (课文原句P44)Put these words in the correct order to describe the stages of a scientific experiment. 把下列词按正确的顺序排列来描述一个科学实验的阶段。 The peace talk has reached an important stage. 和平会谈已达到重要阶段。,The project has reached a stage where we must make a choice. 这项工程已达到我们必须做出选择的阶段。 Tom stood on the stage，feeling very nervous. 汤姆站到舞台上，感到非常紧张。,2.Theyre getting to the stage_they hardly ever go out together to have dinner. Awhat Bthat Cwhere Dwhich 解析： 此题考查定语从句，where在从句中作地点状语。 答案： C,3完成句子 It is no use talking about the result_ _ _(在这个阶段) 答案： at this stage,react vi.反应 react with.与发生(化学)反应 react against sth./sb.反对，反抗 (课文原句P44)When we use metals，it is important to know how they react with different substances，for example，water and oxygen.当我们使用金属时，懂得它们与其他物质比如水和氧气怎样发生反应，这是很重要的。,I wasnt sure how you would react to the decision. 我不确定你会对这个决定有什么反应。 Iron reacts with water and air to produce rust.铁与水和空气起反应而生锈。 Many young people react against traditional values. 许多年轻人反对传统的价值观。,reaction n反应 (课文原句P44)The reaction of metals with these substances can be put in order.(不同的)金属与这些物质的反应程度可以按顺序排列起来。,4.完成句子 遇到危险时，我们的第一反应就是跑开。 Running away is_ _ _when we meet danger. 孩子们通常以违背父母的意愿来反抗他们。 Children tend to_ _their parents by going against their wishes. 答案： our first reaction react against,form (1)v.(使)形成；使(组成)；养成 (课文原句P44)Burns to form an oxide燃烧生成氧化物 We should form a good habit to keep healthy. 我们应该养成好习惯以保持健康。,(2)n.形式，形状；表格，格式 in the form of以形式，呈状态 fill in/out a form填表格 Help in the form of money will be very welcome. 以钱的形式资助将十分受欢迎。 Please fill in the following form.请填写下面的表格。,5.Youd sound a lot more polite if you make a quest_a question. Ain search of Bin the form of Cin need of Dinstead of 解析： 句意为：如果你以问题的形式提出要求，那会显得更有礼貌。in the form of以形式。 答案： B,6完成句子 My son has_ _ _ _ _ _ _(养成早起的习惯) in the morning. 答案： formed the habit of getting up early,conclusion n结论 arrive at/come to/draw/reach a conclusion得出结论 make a conclusion下结论 in conclusion最后，作为结束 (课文原句P45)Conclusion：Iron does not rust in dry air. 结论：铁在干燥的空气中不生锈。,I arrived at/came to/drew/reached the conclusion that he had been lying.我看他是在撒谎。 In conclusion，Id like to say that the work has been well done. 最后，我想说这工作做得不错。,conclude vt.下结论，推断，结束 The book concluded with a happy ending. 这本书以大团圆作为结束。 The police concluded that the driver of the car was to blame for the accident.警方断定这辆轿车的司机应该为这次事故负责。,7.完成句子 你们从这个故事中得出了什么结论？ _ _ _ _ _from the story? 最后我想说我在这里过得非常愉快。 _ _，Id like to say how much Ive enjoyed staying here. 答案： What conclusion did you reach In conclusion,aim (1) n目标，目的 take aim at sb./sth.把目标对准某人/某物 with the aim of目的是 The aim of the course is to improve students reading skills. 这门课程的目的是提高学生的阅读技巧。,be aimed at Obama is aiming to reduce the unemployment by 50%. 奥巴马正力求使失业人数下降50%。 What I said yesterday was not aimed at her. 我昨天的话不是针对她的。,助记,8.完成句子 这个反吸烟组织是针对青少年的。 This antismoking organisation_ _ _young teenagers. 我们访问学校，目的是使年轻人对戏剧感兴趣。 We visit schools_ _ _ _getting young people interested in the theatre. 答案： is aimed at with the aim of,9My remarks_at you at all.That is to say，I didnt aim my words_you at all. Adidnt aim；to Bdoesnt aim；on Cwere not aimed；at Dwere not aiming；for 解析： 此题考查短语be aimed at或aim at对准的用法。 答案： C,put.in order 把按顺序排列，把收拾/整理得有条不紊 (课文原句P44)The reaction of metals with these substances can be put in order. 金属与这些物质的反应程度可以按顺序排列起来。 It has become her habit to put everything in order. 把物品放得有条不紊已成为她的习惯。,in good order井然有序 out of order混乱；(机器等)出故障，失灵 Sorry，my telephone is out of order. 不好意思，我的电话出故障了。,10.完成句子 整理书后，他高高兴兴地出去散步了。 After his books_ _ _ _，he went out for a walk. 答案： were put in order,add.to.往加入 (课文原句P45)Add some oil to the water.往水中加些油。 Shall I add some sugar to your coffee? 要我往你的咖啡里加糖吗？,add to增加，增添 add up sth.add sth.together把某物加起来 add up to共计，共达 add补充说,The bad weather added to our difficulties. 坏天气增加了我们的困难。 These numbers add up to 100.这些数字合计为100。 Please add up all these numbers. 把这些数字都加起来。 He added that they would return a week later. 他补充说他们一周后回来。,11.用add短语的适当形式填空 This music_our pleasure and makes us relaxed. Please_these figures and you will know the result of the competition. Do you believe that Lincolns education_no more than one year?,Since then，the Great Wall has been_，rebuilt and repaired，especially during the Ming Dynasty. Please_sugar and milk_your coffee.They will make it more delicious. 答案： adds to；add up；added up to；added to；add；to,Twothirds of the earths surface is water. 地球表面的2/3是水。 (1)在英语中，表示分数时，分子用基数词，分母用序数词；分子大于1时，表示分母的序数词要用复数，并且要在分子和分母之间加上连字符“”。 1/3 onethird 4/5 fourfifths,(2)分数、百分数作主语时，谓语动词的单复数取决于其后面的名词。 Only onethird of the work has been done by now. 到现在为止仅完成了1/3的工作。 Over fourfifths of the students in our school are from countryside.我们学校4/5以上的学生来自农村。,12.用所给词的适当形式填空 五分之二的粮食用来饲养牲口。 Twofifths of the grain_(be) used to feed animals. 百分之九十的吸烟者是男性。 Ninety percent of the smokers_(be) male. 答案： is are,A quarter is the same as 25 percent (25%) 四分之一等于百分之二十五。 the same as和一样，为固定搭配，as不可换作他词，as后可接代词、副词，也可接名词从句。 My bag is the same as yours.我的袋子和你的相同。 The student has made the same mistake as last time. 那个学生犯了和上次相同的错误。,She goes to the same university as her father did. 她现在就读的那所大学是她父亲当年学习的地方。 注意：the samen.as引导的从句表示同类，而the samen.that从句指同一个事物。,This is the same wallet that I lost a week ago. 这就是我一星期前遗失的皮夹。(同一个) This is the same wallet as I lost a week ago. 这个钱夹和我一星期前丢的那个一模一样。(同类),13.完成句子 你的意见和我的一样。 Your opinion is_ _ _mine. 答案： the same as,.单词拼写 1. What_(结论) do you draw from the evidence？Please tell me at once. 答案： conclusion 2Mr Lis_(目标) is to finish writing two books before going abroad this summer. 答案： aim,3Water and ice are the same_(物质) in different forms. 答案： substance 4The girl kept her_(平衡) with a long stick in her hands. 答案： balance,5We are proud of having all the latest e_in our chemistry lab. 答案： equipment 6Children should f_good habits from the very beginning. 答案： form,7If you put some salt into the water，it will d_soon. 答案： dissolve 8We cant imagine how people live without e_in modern times. 答案： electricity,.短语翻译 1add._. 往加入 2twothirds _ 三分之二的 3think _ 想，考虑；把当成 4keep._ 把关在外面,5put._ order 使有条理，使整齐 6find _弄清楚，弄明白 7be different _ 与不同 8the same _ 和一样,.完成句子 1你的缺席会增加我们的困难。 Your absence will_ _our difficulty. 答案： add to 2这家商店出售帐篷和其他野营用具。 The store sells tents and_ _ _. 答案： other camping equipment,3最后，我要感谢你们为我所做的一切。 _ _，Id like to thank you for all youve done for me. 答案： In conclusion 4这将把空气隔绝在水外。 This will_air_the water. 答案： keep；out of,5你想把你的名字加到名单里吗？ Do you want to_your name_ the list? 答案： add；to 6动物和人一样会感觉到疼痛。 Animals feel pain_ _ _we do. 答案： the same as,7把一切收拾得有条不紊已成为她的习惯。 It has become her habit to_everything_ _. 答案： put；in order 8这本书适宜幼童阅读。 This book_ _ _very young children. 答案： is aimed at,同学们,来学校和回家的路上要注意安全,同学们,来学校和回家的路上要注意安全,同学们,来学校和回家的路上要注意安全,同学们,来学校和回家的路上要注意安全,
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