概括大意与完成句子随堂讲义

讲义打印注意事项：如右图所示：点击打印之后会出现右图的选项卡，在打印内容那一栏里选择讲义，在颜色/灰度那一栏里选择纯黑白，在每页幻灯片数那一栏选6，然后点击确定即可打印。职称英语概括大意与完成句子主讲老师付欣一篇文章出两种题型概括大意4分完成句子 4分

8分题型概述这篇文章是国家指定教材外的文章。一.概括大意二.完成句子三.概括大意与完成句子__方法技巧练习四.概括大意与完成句子__复习策略概括大意与完成句子__课程讲解目录1、题型特点2、做题方法3、文章练习1、题型特点2、做题方法3、文章练习一.概括大意（一）题型特点（二）做题方法（三）文章练习概括大意__目录概括大意__题型特点（一）题型特点 文章4段的中心思想。 注意： 1）选项的特点——从6个被选答案中选出4个

正确答案。有2个是错误的答案。 2）文章的长度一般是4-5段。（二）做题方法 1.看标题 2.看问哪4段并做记号 3.分析A—F选项或先看问的那4段然后再去对A—F选项。 4.分析完之后到问的那4段中找答案 5.注意事项概括大意__做题方法汇总

1.看标题：根据自己的情况可以查字典也可以不查字典。

例：EarthAngels概括大意__做题方法12.看问哪4段并做记号例：

看下面的文章概括大意__做题方法21JoyingBresciawas8yearsoldwhenshenoticedthatcigarettebutts(烟头)werelitteringherhometownbeachinIsleofPalms,SouthCarolina.Whenshelearnedthatittakesfiveyearsfortheremainsofacigarettetodisintegrate,shedecidedtotakeaction.Joyinglauncheda“NoButtsontheBeach”campaign.Sheraisedmoneyandawarenessabouttheneedtokeepthebeachesclean.

概括大意__做题方法2Withthehelpofothers,Joyingalsoboughtorreceiveddonationsofgallonsizeplasticice-creambuckets.Thebucketswerefilledwithsand,andplacedatallpublicaccessareasofthebeach.Thebucketsallowedpeopletodisposeoftheircigarettesbeforehittingthebeach.Twoyearslater,Joyingsaysthebucketsarefullandthebeachinnearlyfreeofcigarettedebris(残片).概括大意__做题方法22PeoplewholiveinorvisitSteamboatSprings,Colorado,haveCarterDunhamtothankforanewstatewildliferefugethatpreserves20acresofmarshlandandmanyspeciesofwildlife.CarterandotherstudentswroteamanagementplanfortheareaaroundtheYampaRiver.TheplanwaspartofaclassprojectwhenCarterwasafreshmanatSteamboatSpringsHighSchool.WorkingwiththeColoradoDivisionofWildlife,Carterandhisclassmatesmappedtheareaandspeciesofanimalslivingthere.Theyalsomadedecisionsabout,amongotherthings,wherefencesandparkingareasshouldbebuilt.概括大意__做题方法23BarbaraBrownandherfriendscollectoil.Itstartedasaprojectfortheir4HClubafteroneofthegirlsnoticedherfatherusingmotoroiltokillweedsontheirfarminVictoria,Texas.Theydidsomeresearchanddiscoveredthatoilcancontaminategroundwater—arealdangerinruralareas,wherepeopleliveoffthewaterontheirland.Thegirlsresearchedwaystorecycleoilandworkedwithalocaloilrecyclingcompanyontheissue.Now,the“Don’tBeCrude”programrunsoilcollectionsites—tanksthatholdupto460gallons—wherepeopleinthecommunitycandisposeoftheiroil.概括大意__做题方法24Fiveyearsago,11yearoldRyanHreljacwasalittleboywithabigdream:forallthepeopleinAfricatohavecleandrinkingwater.Hisdreambeganinthefirstgradewhenhelearnedthatpeopleweredyingbecausetheydidn’thavecleanwaterandthataslittleas$70couldbuildawell.“Wereallytakewaterforgranted,”saysRyan,ofKemptville,Ontario,inCanada.“Inothercountries,youhavetoplanforit.”Ryanearnedthefirst$70bydoingextrachores(零工)，butwiththehelpofothers,hehassinceraisedhundredsofthousandsofdollars.HiseffortsledtothestartoftheRyan’sWellFoundation,whichraisesmoneyforcleanwaterandhealthrelatedservicesforpeopleinAfricancountriesanddevelopingcountries.概括大意__做题方法2文章问题：23Paragraph1___________

24Paragraph2___________

25Paragraph3___________

26Paragraph4___________概括大意__做题方法23.分析A—F选项或先看问的那4段然后再去对A—F选项。具体讲解：分析A—F选项,分析什么？找关键词。概括大意__做题方法3关键词包括：名词词组数字年代写法特殊的单词形容词副词原级比较级和最高级动词概括大意__做题方法3名词的标志：aanthe后接名词of两边是名词名词后缀:

-tion-sion-ness-ment -y-ence-ance写法特殊的单词：大写字母的单词有连字符的单词有引号的单词概括大意__做题方法34.分析完之后到问的那4段中找答案。答案的特点

就是段落中的单词与A—F选项的单词一模一样，一模一样的单词有一个，两个甚至更多，或找相似的单词。注意：词性变了不影响选择。概括大意__做题方法4A.ProvideCleanWaterB.DigOilWellsC.SaveCleanWaterD.Don'tLitterE.Don'tBeCrudeF.ProtectWildlife概括大意__做题方法4正确答案的出处段落的第一句，第二句和最后一句。以第一句为主。如果这三个地方没有，往中间看，中间还没有就不做了。这样的题是难题，同义改写了。

D

FＥA概括大意__做题方法4注意以下6点：如果A—F选项很短，有必要查一下你不认识的单词，以防同义改写。2)词性变化不影响选择3)注意名词前的修饰词概括大意__做题方法54)如果段落中有showconcludeconclusionfindfoundsuggesttheotherwords后面一般是答案。5)如果第二句，最后一句出现了buthowever，以它后面的再现词为主。6)如果一个选项的关键词出现在两段里，那么这两段可以同时选这一个选项。概括大意__做题方法5（三）概括大意__文章练习概括大意__文章练习

ScienceFiction1Amongstthemostpopularbooksbeingwrittentodayarethosewhichareusuallyclassifiedassciencefiction.Hundredsoftitlesarepublishedeveryyearandarereadbyallkindsofpeople.Furthermore,someofthemostsuccessfulfilmsofrecentyearshavebeenbasedonsciencefictionstories.概括大意__文章练习12Itisoftenthoughtthatsciencefictionisafairlynewdevelopmentinliterature,butitsancestorscanbefoundinbookswrittenhundredsofyearsago.Thesebookswereoftenconcernedwiththepresentationofsomeformofidealsociety,athemewhichisstilloftenfoundinmodernstories.概括大意__文章练习13Mostoftheclassicsofsciencefiction,however,havebeenwrittenwithinthelasthundredyears.BooksbywriterssuchasJulesVerneandH.G.Wells,tomentionjusttwowell-knownauthors,havebeentranslatedintomanylanguages.概括大意__文章练习14Modernsciencefictionwritersdon'twriteaboutmenfromMarsorspaceadventurestories.Theyaremoreinterestedinpredictingtheresultsoftechnicaldevelopmentsonsocietyandthehumanmind;orinimaginingfutureworldswhichareareflectionoftheworldwhichweliveinnow.Becauseofthistheirwritinghasobviouspoliticalundertones.概括大意__文章练习15Inanagewheresciencefactfrequentlyovertakessciencefiction,thewritersmanyfinditdifficulttokeepaheadofscientificadvances.Thosewhoaresufficientlyclear-sightedtoseethewaywearegoing,however,mayprovideavaluablelessononhowtodealwiththeproblemswhichsocietywillinevitablyfaceasittriestomasteritsnewtechnology.概括大意__文章练习1概括大意__文章练习1文章问题：1Paragraph1___________

2Paragraph2___________

3Paragraph3___________

4Paragraph4___________A.PopularityofScienceFictionB.AFairlyNewDevelopmentC.ClassicsofScienceFictionD.DifficultyinKeepingaheadofScientificAdventureE.ItsOriginF.ThemesofModernScienceFiction AECF概括大意__文章练习1ABaby’sGrowth1Todescribeababy'sgrowth,theoldsaying“onethingleadstoanother”shouldreallyread,“onethingleadstoanexplosion.”Theperfectionofvisionandtheabilitytoholdhisheadupallowappreciationofvisualspace.Theevolutionofincreasinglyefficientreachingalsoletsthebabyappreciateandparticipateinhisthree-dimensionalworld.概括大意__文章练习22Youmaynoticethatyourbabycangrabtoyswitheitherhand.Thisispartlybecausethebabyhaslearnedtograspanobjectevenifittoucheshishandlightlyorhiseyesareaverted.Bytheendofthefourthmonth,hecanprobablyalternatehandstograbthetoysortransferatoyfromonehandtotheother.Hemayevenwaveitbriskly,thentransferitandrepeatthewaving,shuttlingitbackandforthbetweenhands.

概括大意__文章练习2Inimitatingthebehaviorofonehandwiththeother,thebabymaybebecomingawarethathecandothesamethingwitheacharmandthateachhandisdistinctfromtheother.Thisawarenessisimportanttohisreceivinginformationaboutspace.Thebabyalsobeginstoseehimselfactwhenherepeatedlyreachesforandgraspsthings.Hestartstodistinguishhimselffromtheouterworld.

概括大意__文章练习23Ifyouwouldlikeanothersignofthisgrowthprocess,tryoneofGesell'smeasuresofmentalgrowth,thebehaviorofababybeforeamirror.AccordingtoGesell,ababywillsmileathisimageataroundtwentyweeksofage.Holdyourbabyuptoamirrorandwatchhimexaminethefacesthere.Hewillprobablyattendmosttohisownimageandperhapssmileatit.概括大意__文章练习2Ashisimagereturnsthesmile,hemaybecomeactiveandvocalize.Hemayalsolookbackandforthbetweenyourimageandyouasiftheduplicationpuzzleshim.Ababywhoknowshismother'sfacecannotunderstandtwoofthem.Callingsoftlytoyourbaby,ashelooksatyourconfusingdouble,complicatesmattersevenfurther.Histurningbacktotherealyoushowsthatababyfourmonthsoldislikelytohavetheabilityofpreferenceindiscrimination.概括大意__文章练习24Anearlyattachmenttooneobject—atoyorastuffedanimal—isanotherindexofdiscrimination,aswellasself-development,forthebaby'sinterestsaregoingbeyondhimself.Mostbabiesdonotpreferonetoythisearly,butsomewill.Afterexploringeachtoy,yourbabymaystartreachingandplayingwithonespecialone.Inthemonthstocome,thetoyoranythingelsethebabyidentifieswithhimselfbywearingorcarryingmaybecomea“lovey”.概括大意__文章练习2A“lovey”willbesleptwith,chewed,hugged,loved,and“talkedto.”These“loveies”givethebabyawayofcopingwiththenecessaryseparationsfromthemother.Afriendlyandfamiliartoybearmayjustmakehimeasieronhimself.Ratherthanfeelingthreatened,amothershouldbeflatteredbyherbaby’sextensionofaffectionelsewhere.Ababywiththehearttofinda“lovey”isshowingearlymentalresourcefulnessandflexibility.

概括大意__文章练习2概括大意__文章练习2文章问题：1Paragraph1___________

2Paragraph2___________

3Paragraph3___________

4Paragraph4___________A.Gesell'smeasureofthebaby'smentalgrowthB.ThebabylearnstosethimselfapartfromtheouterworldthroughplayingwithtoysC.Thebaby'sconfusioninfrontofamirrorD.Significanceofonedevelopmentinababy'slifeE.Thebaby’slovefor“Loveies”indicatesearlymentalresourcefulnessandflexibilityF.Thefunctionsofa“lovey”D B A E概括大意__文章练习2二.完成句子一.题型特点二.做题方法三.文章练习完成句子__目录

1、题型特点：四个不完整句，从6个选项中选出4个正确答案。 这4个题出自文章4段，但不一定都是概括大意的那4段。完成句子__题型特点2、出题特点：第一题出自第一段，最后一题出自最后一段。第一题在第一段没有找到就到第二段去找，如果找到了，那么第二题就从第三段找起。最后一题在最后一段中没有，看倒数第二段。有时会出现一段出两个题。1.技巧做题法 1)看题干找关键词

2)再看A—F选项找关键词 3)然后到相应的段落找再现词。 4)找到题干再现的所在句，把整句看完去对A—F选项，

有再现词的就是答案。如果本句没有再现词，就看上下句，甚至整段。2.语法知识做题法

完成句子这个题型也可以通过语法，词组和句型的知识来做题。完成句子__做题方法EarthAngels1JoyingBresciawas8yearsoldwhenshenoticedthatcigarettebutts(烟头)werelitteringherhometownbeachinIsleofPalms,SouthCarolina.Whenshelearnedthatittakesfiveyearsfortheremainsofacigarettetodisintegrate,shedecidedtotakeaction.Joyinglauncheda“NoButtsontheBeach”campaign.Sheraisedmoneyandawarenessabouttheneedtokeepthebeachesclean.Withthehelpofothers,Joyingalso完成句子__文章练习1boughtorreceiveddonationsofgallonsizeplasticice-creambuckets.Thebucketswerefilledwithsand,andplacedatallpublicaccessareasofthebeach.Thebucketsallowedpeopletodisposeoftheircigarettesbeforehittingthebeach.Twoyearslater,Joyingsaysthebucketsarefullandthebeachinnearlyfreeofcigarettedebris(残片).完成句子__文章练习12PeoplewholiveinorvisitSteamboatSprings,Colorado,haveCarterDunhamtothankforanewstatewildliferefugethatpreserves20acresofmarshlandandmanyspeciesofwildlife.CarterandotherstudentswroteamanagementplanfortheareaaroundtheYampaRiver.TheplanwaspartofaclassprojectwhenCarterwasafreshmanatSteamboatSpringsHighSchool.WorkingwiththeColoradoDivisionofWildlife,Carterandhisclassmatesmappedtheareaandspeciesofanimalslivingthere.Theyalsomadedecisionsabout,amongotherthings,wherefencesandparkingareasshouldbebuilt.完成句子__文章练习13BarbaraBrownandherfriendscollectoil.Itstartedasaprojectfortheir4HClubafteroneofthegirlsnoticedherfatherusingmotoroiltokillweedsontheirfarminVictoria,Texas.Theydidsomeresearchanddiscoveredthatoilcancontaminategroundwater—arealdangerinruralareas,wherepeopleliveoffthewaterontheirland.Thegirlsresearchedwaystorecycleoilandworkedwithalocaloilrecyclingcompanyontheissue.Now,the“Don’tBeCrude”programrunsoilcollectionsites—tanksthatholdupto460gallons—wherepeopleinthecommunitycandisposeoftheiroil.完成句子__文章练习14Fiveyearsago,11yearoldRyanHreljacwasalittleboywithabigdream:forallthepeopleinAfricatohavecleandrinkingwater.Hisdreambeganinthefirstgradewhenhelearnedthatpeopleweredyingbecausetheydidn’thavecleanwaterandthataslittleas$70couldbuildawell.“Wereallytakewaterforgranted,”saysRyan,ofKemptville,Ontario,inCanada.“Inothercountries,youhavetoplanforit.”

Ryanearnedthefirst$70bydoingextrachores(零工)，butwiththehelpofothers,hehassinceraisedhundredsofthousandsofdollars.HiseffortsledtothestartoftheRyan’sWellFoundation,whichraisesmoneyforcleanwaterandhealthrelatedservicesforpeopleinAfricancountriesanddevelopingcountries.完成句子__文章练习127Joyingplacedthebucketsatallpublicaccessareasto

.28PeoplearegratefultoCarterDunhamforhiseffortsto

.29Disposedoilandmanyotheritemscanbereusedto

.30Ryan,withthehelpofothers,isfulfillinghisdreamofhelpAfricanpeopleto

.完成句子__文章练习1AmakenewmaterialsBpreservewetlandandanimalsChavecleanairDhavecleanwaterEcollectcigarettebuttsFcollectdisposedoil EBAD完成句子__文章练习1

ABaby’sGrowth1Todescribeababy'sgrowth,theoldsaying“onethingleadstoanother”shouldreallyread,“onethingleadstoanexplosion.”

Theperfectionofvisionandtheabilitytoholdhisheadupallowappreciationofvisualspace.Theevolutionofincreasinglyefficientreachingalsoletsthebabyappreciateandparticipateinhisthree-dimensionalworld.完成句子__文章练习22Youmaynoticethatyourbabycangrab

toyswitheitherhand.Thisispartlybecausethebabyhaslearnedtograspanobjectevenifittoucheshishandlightlyorhiseyesareaverted.Bytheendofthefourthmonth,hecanprobablyalternatehandstograbthetoysortransferatoyfromonehandtotheother.完成句子__文章练习1Hemayevenwaveitbriskly,thentransferitandrepeatthewaving,shuttlingitbackandforthbetweenhands.Inimitatingthebehaviorofonehandwiththeother,thebabymaybebecomingawarethathecandothesamethingwitheacharmandthateachhandisdistinctfromtheother.Thisawarenessisimportanttohisreceivinginformationaboutspace.Thebabyalsobeginstoseehimselfactwhenherepeatedlyreachesforandgraspsthings.Hestartstodistinguishhimselffromtheouterworld.完成句子__文章练习23Ifyouwouldlikeanothersignofthisgrowthprocess,tryoneofGesell'smeasuresofmentalgrowth,thebehaviorofababybeforeamirror.AccordingtoGesell,ababywillsmileathisimageataroundtwentyweeksofage.Holdyourbabyuptoamirrorandwatchhimexaminethefacesthere.Hewillprobablyattendmosttohisownimageandperhapssmileatit.完成句子__文章练习2Ashisimagereturnsthesmile,hemaybecomeactiveandvocalize.Hemayalsolookbackandforthbetweenyourimageandyouasiftheduplicationpuzzleshim.Ababywhoknowshismother'sfacecannotunderstandtwoofthem.Callingsoftlytoyourbaby,ashelooksatyourconfusingdouble,complicatesmattersevenfurther.Histurningbacktotherealyoushowsthatababyfourmonthsoldislikelytohavetheabilityofpreferenceindiscrimination.完成句子__文章练习24Anearlyattachmenttooneobject—atoyorastuffedanimal—isanotherindexofdiscrimination,aswellasself-development,forthebaby'sinterestsaregoingbeyondhimself.Mostbabiesdonotpreferonetoythisearly,butsomewill.Afterexploringeachtoy,yourbabymaystartreachingandplayingwithonespecialone.完成句子__文章练习2Inthemonthstocome,thetoyoranythingelsethebabyidentifieswithhimselfbywearingorcarryingmaybecomea“lovey”.A“lovey”willbesleptwith,chewed,hugged,loved,and“talkedto.”These“loveies”givethebabyawayofcopingwiththenecessaryseparationsfromthemother.Afriendlyandfamiliartoybearmayjustmakehimeasieronhimself.Ratherthanfeelingthreatened,amothershouldbeflatteredbyherbaby’sextensionofaffectionelsewhere.Ababywiththehearttofinda“lovey”isshowingearlymentalresourcefulnessandflexibility.完成句子__文章练习25.Thebaby’sabilitytosensethevisualspaceowesto______________.6.Inimitatingthebehaviorofonehandwiththeother,thebabyisableto______________.7.Ababywillsmileashisimageat______________.8.Thebaby’sextensionofaffectionshouldmakethemother______________.完成句子__文章练习2AaroundtwentyweeksofageB.feelflatteredC.tellonehandfromtheotherD.theperfectionofvisionandtheabilitytoholdhisheadupE.haspreferenceamonghistoysF.explorehistoys DCAB完成句子__文章练习2NorthAmerica1ThenaturalregionsofNorthAmericaaretypifiedbybroadareasofapparentlysimilarappearanceandmorphology．Theentirewesternmarginofthecontinentisparalleledbyaseriesofmountainchainswithintermountainbasinsandplateaus．Thevastinteriorofthecontinentisdominatedbygentlyrollingplains．Theeasternsideofthecontinenthasbothlowmountainreliefand,alongtheSoutheastcoast，almostflattopography．完成句子__文章练习32TheagriculturalresourcesofNorthAmericaareimmense，withmuchofthispotentiallocatedintheUnitedStatesandsouthernCanada．AlmostalloftheInteriorPlainsandtheAtlanticandGulfLowlandsregionsaresuitableforagriculture．SignificantareaswithintheWesternUplands—whereverwaterisavailable—arevaluablecroporpasturelandsassmallersectionsofMiddleAmerica．完成句子__文章练习33Ofthemorethan400millionpeopleinNorthAmerica，morethan60％arelocatedintheUnitedStatesandalmostanother20％liveinMexico．AlmostallofCanada’speoplelivewithin200km(125mi)oftheUS．border．Theremainderofthecontinent’spopulationisdividedbetweentheCaribbeanandCentralAmericancountries，withCuba，intheCaribbean，byfarthemostpopulous．完成句子__文章练习34TheeducationallevelsofNorthAmericansareexceededconacontinentalscaleonlyinEuropeandinAustralia．IntheUnitedStatesandCanadamorethan50％ofthepeopleolderthan25yearshavecompletedatleast12yearsofschooling．Inaddition，morethan15％havecompletedatleast4yearsofcollege．Virtuallytheentirepopulationofbothcountriesareconsideredliterate．Incontrast，alargeportionoftheMiddleAmericanpopulationdoesnotfinishprimaryschool．完成句子__文章练习35Levelsofeconomicdevelopmentvarygreatlyoverthecontinent．ThepostindustrialeconomiesofCanadaandtheUnitedStatesemploywellunderone—tenthoftheirlaborforcesinagricultureandone-thirdorlessinindustry,withtherestprimarilyemployedinserviceindustries．Fueledbyoilrevenues，Mexico’seconomydevelopedmorerapidlyinthe1970sthananyothercountry’sonthecontinent．Thefallofoilpricesinthe1980s，however，stalledthisgrowthandplungedMexicodeeplyintodebt．IntheCaribbeanthepaceofeconomicdevelopmentisuneven，andunemploymentratesaregenerallyhigh．完成句子__文章练习35ThetopographicalfeatureofNorthAmericais

．6ThegreatpotentialagriculturalresourcesofNorthAmericanliesin

．7InU．S．andCanada

isconsideredilliterate．8Mexico’srapideconomicdevelopmentinthe1970sisdueto

.完成句子__文章练习3AoilrevenuesBnoneCtheentirepopulationDtheU.S.andsouthernCanadaEintermountainbasinsandplateausFbroadareasofsimilarappearanceandmorphology FDBA完成句子__文章练习3完成句子__文章练习45.Foraslongasthreemonthsofayear,thesun__________ontheice-coveredlandofAlaska.6.Accordingtostatistics,__________ofthetotalareaofAlaskahasbeenusedforfarming.7.AlaskawasoriginallypartofRussia,butwasbought__________.8.GolddidnotbringtoAlaskaasmuchwealth__________.A.asfishdoesB.becauseofitsrichnaturalresourcesC.bytheUnitedStatesinthe19thcenturyD.shinesdayandnightE.onlyaverysmallpercentageF.alimitedamountofthegoldfoundthere通过语法、词组和句型的知识来做题三.概括大意与完成句子__方法技巧练习概括大意与完成句子__方法技巧练习LearnaboutNobleGases(惰性气体)1Haveyoueverriddenonaballoon?Manytouristspotsofferballoonridesinorderforpeopletoseethebeautyofaplacefromabove.Aballooncontainsanoblegascalledhelium(氦).Formerly,balloonscontainedhydrogenbuthydrogenisveryflammableanddangerouswhenuncontrolled.Therefore,peopleshiftedtohelium,whichissafer.Heliumissafebecauseithasthepropertiesofthenoblegases.概括大意与完成句子__方法技巧练习1真题2Peopleoncebelievedthatnoblegasescouldn’tchemicallyreactatall.Forthisreason,theywerecalledinertgases(惰性气体).

TheywerealsolistedunderGroup0intheoldperiodictablebecausescientistsbelievedthatthegaseshavezerovalence(价)electronsintheiroutershell.Thiswaslaterproventobeuntruewhensomenoblegascompoundswerediscovered.概括大意与完成句子__方法技巧练习1真题3Thegasesareelements,whichsharesimilarproperties.Thesepropertiesincludebeingmonoatomic,colorless,odorless,beingabletoconductelectricity,andhavinglowchemicalreactivity.NoblegasesincludeHelium,Neon,Argon,Krypton,XenonandRadon.TheseareallfoundinGroup18,intherightmostcolumnoftheperiodictable.Ifyoulookattheperiodictable,youwillnoticethattheseelementsaretheonlyones,whichdonothaveacharge.Heliumhasthelowestmolecular(分子的)weightwhileRadonistheheaviest.概括大意与完成句子__方法技巧练习1真题4Rememberthatchemicalreactionsoccurbecauseatomshavevalenceelectrons,whichareelectronsintheiroutershell.Whentheoutershellis“unfilled”ortherequirednumberofelectronsisnotyetcomplete,theatomismorereactive.Noblegaseshaveafulloutershell,meaningthattheyhavecompleteelectronsintheiroutershell.Thiscompletenumbervaries.Forinstance,theoutershellofHeliumhas2valenceelectronswhiletheoutershellofXenonhas8electrons.Nowadays,thereremainstobeafewnoblegasesbecauseofthelowchemicalreactivityofthesesaidgases.概括大意与完成句子__方法技巧练习1真题5Becauseoftheirproperties,noblegaseshavemanyimportantapplications.Theyarewidelyusedinmedicineandindustries.Forinstance,liquidHeliumisusedforsuperconductingmagnets(磁体).Thesemagnetsareveryimportantinphysicsandmedicine.Whenadoctorsuspectsthataperson’sbrainhasbeendamaged,hemightrequestforMagneticResonanceImaging(MRI).MRIallowsthedoctorto“see”thebrain,withoutoperatingonthepatient.概括大意与完成句子__方法技巧练习1真题23.Paragraph2________24.Paragraph3________25.Paragraph4________26.Paragraph5________概括大意与完成句子__方法技巧练习1真题A.Whatarenoblegases?B.Whatistheperiodictable?C.Whatcausesthelowchemicalreactivityofnoblegases?D.Howwerenoblegasesdiscovered?E.Howwerenoblegasesunderstoodinthepast?F.Whataretheapplicationsofnoblegases?概括大意与完成句子__方法技巧练习1真题27.Noblegasesarenotverychemically

______.

28.AmongtheelementsofnoblegasesHeliumisthe

_________.

29.Therequirednumberofelectronsinnoblegases’outershellis

__________.

30.MRImaymakeoperatingonthepatient

_______.

概括大意与完成句子__方法技巧练习1真题A.lightestB.reactiveC.importantD.completeE.flammableF.unnecessary概括大意与完成句子__方法技巧练习1真题LearnaboutLight1

Ancientcivilizationswereamazedbytheexistenceoflightforthousandsofyears.TheGreekphilosophersbelievedthatlightwasmadeupofcountless,tinyparticlesthatenterthehumaneyeandcreatewhatwecallvision.However,EmpedoclesandaDutchscientistnamedChristianHuygensbelievedthatlightwaslikeawave.Accordingtothem,lightspreadoutandtravelledlikeastraightline.Thistheorywasacceptedduringthe19thcentury.

概括大意与完成句子__方法技巧练习2真题2

In1905,AlbertEinsteinpublishedaresearchpaperinwhichheexplainedwhatisreferredtoasthephotoelectriceffect.Thistheoryexplainsthatparticlesmakeuplight.TheparticlesEinsteinwasreferringtoareweightlessbundles（束）ofelectromagnetic（电磁）energycalledphotons（光子）.Today,scientistsagreethatlighthasadual（二重）nature—itispartparticleandpartwave.Itisaformofenergythatallowsustoseethingsaroundus.概括大意与完成句子__方法技巧练习2真题

3

Thingsthatgiveofflightareknownassourcesoflight.Duringtheday,theprimarysourceoflightisthesun.Othersourcesoflightincludestars,flames,flashlights,streetlampsandglowinggasesinglasstube.概括大意与完成句子__方法技巧练习2真题4

Whenwedrawthewaylighttravelswealwaysusestraightlines.Thisisbecausenormallylightraystravelinastraightline.However,therearesomeinstancesthatcanchangethepathandeventhenatureoflight.Theyarereflection,absorption,interference（干扰）,etc.概括大意与完成句子__方法技巧练习2真题5

Physicistshaveattemptedtomeasurethespeedoflightsincetheearlytimes.In1849,HippolyteFizeauconductedanexperimentbydirectingabeamoflighttoamirrorlocatedkilometersawayandplacedarotatingcogwheel（旋转齿轮）betweenthebeamandthemirror.Fromtherateofrotationofthewheel,numberofwheel’steethanddistanceofthemirror,hewasabletocalculatethatthespeedoflightis313millionmeterspersecond.Inavacuum（真空）,however,thespeedoflightis299,792,458meterspersec