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Section Ⅰ 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? ________________________________________________________________________
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Doyoulikedoingscientificexperiments? Whatshouldyoupayattentiontowhenyouarecarryingoutanexperimentinalab? ________________________________________________________________________ ________________________________________________________________________ 答案:Carryingoutanexperimentinalabisverydangerous.Youmustbecarefulanddotheexperimentunderyourteacher’sguidance.
StepTwo:Fastreading Readthetwopassages(P44-45) quicklyandanswerthefollowingquestions. 1.Whatshouldweknowwhenweusemetals? ________________________________________________________________________ 答案:Weshouldknowhowmetalsreactwithdifferentsubstances.
2.Whatwillhappentocopperwhenitiskeptinwater? ________________________________________________________________________ 答案:Noreaction/Nothing.
3.Whyisoiladdedtothewater? ________________________________________________________________________ 答案:Tokeepairoutofthewater.
4.Whatistheuseofthecottonwoolinthetesttube? ________________________________________________________________________ 答案:Keepingairdry.
StepThree:Carefulreading Readthetext(P44-45) carefullyandchoosethebestanswers. 1.Whichofthefollowingmetalsreactsmostwithwater? A.Copper. B.Iron. C.Aluminium. D.Sodium. 答案:D
2.AccordingtoPassageA,whichofthefollowingreactsmosteasilywhenitisheatedinoxygen?2.AccordingtoPassageA,whichofthefollowingreactsmosteasilywhenitisheatedinoxygen? A.Aluminium. B.Iron. C.Steel. D.Copper. 答案:A
3.Wecanknowfromtheexperiment________. A.howironrustswithoil B.ironisquiteeasytorust C.howwecanpreventironfromrusting D.howironreactswithalltheothersubstances 答案:C
4.Ifsomecleanironnailsarekeptinawetplaceforaweek,thenailswill________.4.Ifsomecleanironnailsarekeptinawetplaceforaweek,thenailswill________. A.rust B.notrust C.formanoxide D.keeptheplacedry 答案:A
5.Thispassagemainlytalksabout________. A.allkindsofmetals B.whatkindofmetalreactsmost C.thedifferentreactionsofmetals D.howmetalsreact 答案:C
StepFour:Summary Differentmetalshavedifferentuses.Whenweusemetals,itisimportanttoknowhowtheyreactwithdifferent1.____________.The2.____________ofmetalswiththesesubstancescanbeputinorder.Fromthetable,wecanfindpotassiumreactsthemostwithoxygenandwaterwhilecopper3.____________reactwithwater.Whenweheatcalciuminoxygen,itburnsto4.____________anoxide.
Tofindoutifironrustsindryair,inairfreewaterandin5.____________water.Let’sdoasimplescientificexperiment.Weneeddifferentpiecesof6.____________,whicharecleanironnails,testtubes,atesttubeholder,somecottonwool,oilandaBunsenburner.Tofindoutifironrustsindryair,inairfreewaterandin5.____________water.Let’sdoasimplescientificexperiment.Weneeddifferentpiecesof6.____________,whicharecleanironnails,testtubes,atesttubeholder,somecottonwool,oilandaBunsenburner.
Well,first,putsomeironnailsatthe7.____________ofatesttube.Thenpushsomecottonwooldownthetube.Next,leavethetubeforoneweek.Afteroneweek,thenailshavenot8.____________.Itshowsthatirondoesn’trustwhentheairisdry.Well,first,putsomeironnailsatthe7.____________ofatesttube.Thenpushsomecottonwooldownthetube.Next,leavethetubeforoneweek.Afteroneweek,thenailshavenot8.____________.Itshowsthatirondoesn’trustwhentheairisdry.
Inthesecondpartoftheexperiment,youmustboilthewatertomakesurethereisnoairinit.Youaddsomeoiltothewaterbecausethis9.____________airoutofit.Italsoshowsthatirondoesnotrustinwaterwithoutairinit.10.____________,thenailsrustinthetubewithordinarywaterinthethirdpartoftheexperiment.Inthesecondpartoftheexperiment,youmustboilthewatertomakesurethereisnoairinit.Youaddsomeoiltothewaterbecausethis9.____________airoutofit.Italsoshowsthatirondoesnotrustinwaterwithoutairinit.10.____________,thenailsrustinthetubewithordinarywaterinthethirdpartoftheexperiment. Thatishowironreactswithairandwithwater.
答案:1.substances2.reaction3.doesn’t4.form 5.ordinary6.equipment7.bottom8.rusted9.keeps 10.However
expandv.膨胀;扩大,扩张 (课文原句P41)Whenyouheatametal,itexpands. 当你加热一种金属的时候,它会膨胀。 ①Studentnumbersareexpandingrapidly. 学生人数在迅速增加。
②Airexpandswhenheated.空气受热膨胀。 ③Thewriterexpandedhisshortnovelintoalongone. 那位作者把他的短篇小说扩展为长篇。 ④Hiscompanyexpandedintoabigone. 他的公司扩大规模而成为大公司。
1.McDonald’shas________itsbusinessbyopeningmorestoresinbigcities.1.McDonald’shas________itsbusinessbyopeningmorestoresinbigcities. A.expanded B.spread C.increased D.improved 解析:expandone’sbusiness扩大生意。 答案:A
stagen.[C] 阶段,时期;舞台 (课文原句P44)Putthesewordsinthecorrectordertodescribethestagesofascientificexperiment. 把下列词按正确的顺序排列来描述一个科学实验的阶段。 ①Thepeacetalkhasreachedanimportantstage. 和平会谈已达到重要阶段。
②Theprojecthasreachedastagewherewemustmakeachoice. 这项工程已达到我们必须做出选择的阶段。 ③Tomstoodonthestage,feelingverynervous. 汤姆站到舞台上,感到非常紧张。
2.They’regettingtothestage________theyhardlyevergoouttogethertohavedinner.2.They’regettingtothestage________theyhardlyevergoouttogethertohavedinner. A.what B.that C.where D.which 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 Itisnousetalkingabouttheresult________________________(在这个阶段). 答案:atthisstage
reactvi.反应 reactwith...与……发生(化学)反应 reactagainststh./sb.反对,反抗 (课文原句P44)Whenweusemetals,itisimportanttoknowhowtheyreactwithdifferentsubstances,forexample,waterandoxygen.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。
①Iwasn’tsurehowyouwouldreacttothedecision. 我不确定你会对这个决定有什么反应。 ②Ironreactswithwaterandairtoproducerust.铁与水和空气起反应而生锈。 ③Manyyoungpeoplereactagainsttraditionalvalues. 许多年轻人反对传统的价值观。
reactionn.反应 (课文原句P44)Thereactionofmetalswiththesesubstancescanbeputinorder.(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 ①遇到危险时,我们的第一反应就是跑开。 Runningawayis________________________whenwemeetdanger. ②孩子们通常以违背父母的意愿来反抗他们。 Childrentendto________________theirparentsbygoingagainsttheirwishes. 答案:①ourfirstreaction②reactagainst
form (1)v.(使)形成;使(组成);养成 (课文原句P44)Burnstoformanoxide燃烧生成氧化物 Weshouldformagoodhabittokeephealthy. 我们应该养成好习惯以保持健康。
(2)n.形式,形状;表格,格式 intheformof以……形式,呈……状态 fillin/outaform填表格 Helpintheformofmoneywillbeverywelcome. 以钱的形式资助将十分受欢迎。 Pleasefillinthefollowingform.请填写下面的表格。
5.You’dsoundalotmorepoliteifyoumakeaquest________aquestion.5.You’dsoundalotmorepoliteifyoumakeaquest________aquestion. A.insearchof B.intheformof C.inneedof D.insteadof 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。intheformof以……形式。 答案:B
6.完成句子 Mysonhas________________________________________________________(养成早起的习惯) inthemorning. 答案:formedthehabitofgettingupearly
conclusionn.结论 arriveat/cometo/draw/reachaconclusion得出结论 makeaconclusion下结论 inconclusion最后,作为结束 (课文原句P45)Conclusion:Irondoesnotrustindryair. 结论:铁在干燥的空气中不生锈。
①Iarrivedat/cameto/drew/reachedtheconclusionthathehadbeenlying.我看他是在撒谎。①Iarrivedat/cameto/drew/reachedtheconclusionthathehadbeenlying.我看他是在撒谎。 ②Inconclusion,I’dliketosaythattheworkhasbeenwelldone. 最后,我想说这工作做得不错。
concludevt.下结论,推断,结束 ③Thebookconcludedwithahappyending. 这本书以大团圆作为结束。 ④Thepoliceconcludedthatthedriverofthecarwastoblamefortheaccident.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 ①你们从这个故事中得出了什么结论? ________________________________________fromthestory? ②最后我想说我在这里过得非常愉快。 ________________,I’dliketosayhowmuchI’veenjoyedstayinghere. 答案:①Whatconclusiondidyoureach②Inconclusion
aim (1) n.目标,目的 takeaimatsb./sth.把目标对准某人/某物 withtheaimof目的是…… ①Theaimofthecourseistoimprovestudents’ readingskills. 这门课程的目的是提高学生的阅读技巧。
beaimedat ④Obamaisaimingtoreducetheunemploymentby50%. 奥巴马正力求使失业人数下降50%。 ⑤WhatIsaidyesterdaywasnotaimedather. 我昨天的话不是针对她的。
8.完成句子 ①这个反吸烟组织是针对青少年的。 Thisantismokingorganisation________________________youngteenagers. ②我们访问学校,目的是使年轻人对戏剧感兴趣。 Wevisitschools________________________________gettingyoungpeopleinterestedinthetheatre. 答案:①isaimedat②withtheaimof
9.Myremarks________atyouatall.Thatistosay,Ididn’taimmywords________youatall.9.Myremarks________atyouatall.Thatistosay,Ididn’taimmywords________youatall. A.didn’taim;to B.doesn’taim;on C.werenotaimed;at D.werenotaiming;for 解析: 此题考查短语beaimedat或aimat对准……的用法。 答案:C
put...inorder 把……按顺序排列,把……收拾/整理得有条不紊 (课文原句P44)Thereactionofmetalswiththesesubstancescanbeputinorder. 金属与这些物质的反应程度可以按顺序排列起来。 ①Ithasbecomeherhabittoputeverythinginorder. 把物品放得有条不紊已成为她的习惯。
ingoodorder井然有序 outoforder混乱;(机器等)出故障,失灵 ②Sorry,mytelephoneisoutoforder. 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。 Afterhisbooks________________________________,hewentoutforawalk. 答案:wereputinorder
add...to...往……加入…… (课文原句P45)Addsomeoiltothewater.往水中加些油。 ①ShallIaddsomesugartoyourcoffee? 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
②The bad weather added to our difficulties. 坏天气增加了我们的困难。 ③These numbers add up to 100.这些数字合计为100。 ④Please add up all these numbers. 把这些数字都加起来。 ⑤He added that they would return a week later. 他补充说他们一周后回来。