概括大意與完成句子隨堂講義

講義打印注意事項：如右圖所示：點擊打印之后會出現(xiàn)右圖的選項卡，在打印內(nèi)容那一欄里選擇講義，在顏色/灰度那一欄里選擇純黑白，在每頁幻燈片數(shù)那一欄選6，然后點擊確定即可打印。職稱英語概括大意與完成句子主講老師付欣一篇文章出兩種題型概括大意4分完成句子 4分

8分題型概述這篇文章是國家指定教材外的文章。一.概括大意二.完成句子三.概括大意與完成句子__方法技巧練習四.概括大意與完成句子__復習策略概括大意與完成句子__課程講解目錄1、題型特點2、做題方法3、文章練習1、題型特點2、做題方法3、文章練習一.概括大意（一）題型特點（二）做題方法（三）文章練習概括大意__目錄概括大意__題型特點（一）題型特點 文章4段的中心思想。 注意： 1）選項的特點——從6個被選答案中選出4個

正確答案。有2個是錯誤的答案。 2）文章的長度一般是4-5段。（二）做題方法 1.看標題 2.看問哪4段并做記號 3.分析A—F選項或先看問的那4段然后再去對A—F選項。 4.分析完之后到問的那4段中找答案 5.注意事項概括大意__做題方法匯總

1.看標題：根據(jù)自己的情況可以查字典也可以不查字典。

例：EarthAngels概括大意__做題方法12.看問哪4段并做記號例：

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

概括大意__做題方法2Withthehelpofothers,Joyingalsoboughtorreceiveddonationsofgallonsizeplasticice-creambuckets.Thebucketswerefilledwithsand,andplacedatallpublicaccessareasofthebeach.Thebucketsallowedpeopletodisposeoftheircigarettesbeforehittingthebeach.Twoyearslater,Joyingsaysthebucketsarefullandthebeachinnearlyfreeofcigarettedebris(殘片).概括大意__做題方法22PeoplewholiveinorvisitSteamboatSprings,Colorado,haveCarterDunhamtothankforanewstatewildliferefugethatpreserves20acresofmarshlandandmanyspeciesofwildlife.CarterandotherstudentswroteamanagementplanfortheareaaroundtheYampaRiver.TheplanwaspartofaclassprojectwhenCarterwasafreshmanatSteamboatSpringsHighSchool.WorkingwiththeColoradoDivisionofWildlife,Carterandhisclassmatesmappedtheareaandspeciesofanimalslivingthere.Theyalsomadedecisionsabout,amongotherthings,wherefencesandparkingareasshouldbebuilt.概括大意__做題方法23BarbaraBrownandherfriendscollectoil.Itstartedasaprojectfortheir4HClubafteroneofthegirlsnoticedherfatherusingmotoroiltokillweedsontheirfarminVictoria,Texas.Theydidsomeresearchanddiscoveredthatoilcancontaminategroundwater—arealdangerinruralareas,wherepeopleliveoffthewaterontheirland.Thegirlsresearchedwaystorecycleoilandworkedwithalocaloilrecyclingcompanyontheissue.Now,the“Don’tBeCrude”programrunsoilcollectionsites—tanksthatholdupto460gallons—wherepeopleinthecommunitycandisposeoftheiroil.概括大意__做題方法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__做題方法2文章問題：23Paragraph1___________

24Paragraph2___________

25Paragraph3___________

26Paragraph4___________概括大意__做題方法23.分析A—F選項或先看問的那4段然后再去對A—F選項。具體講解：分析A—F選項,分析什么？找關鍵詞。概括大意__做題方法3關鍵詞包括：名詞詞組數(shù)字年代寫法特殊的單詞形容詞副詞原級比較級和最高級動詞概括大意__做題方法3名詞的標志：aanthe后接名詞of兩邊是名詞名詞后綴:

-tion-sion-ness-ment -y-ence-ance寫法特殊的單詞：大寫字母的單詞有連字符的單詞有引號的單詞概括大意__做題方法34.分析完之后到問的那4段中找答案。答案的特點

就是段落中的單詞與A—F選項的單詞一模一樣，一模一樣的單詞有一個，兩個甚至更多，或找相似的單詞。注意：詞性變了不影響選擇。概括大意__做題方法4A.ProvideCleanWaterB.DigOilWellsC.SaveCleanWaterD.Don'tLitterE.Don'tBeCrudeF.ProtectWildlife概括大意__做題方法4正確答案的出處段落的第一句，第二句和最后一句。以第一句為主。如果這三個地方?jīng)]有，往中間看，中間還沒有就不做了。這樣的題是難題，同義改寫了。

D

FＥA概括大意__做題方法4注意以下6點：如果A—F選項很短，有必要查一下你不認識的單詞，以防同義改寫。2)詞性變化不影響選擇3)注意名詞前的修飾詞概括大意__做題方法54)如果段落中有showconcludeconclusionfindfoundsuggesttheotherwords后面一般是答案。5)如果第二句，最后一句出現(xiàn)了buthowever，以它后面的再現(xiàn)詞為主。6)如果一個選項的關鍵詞出現(xiàn)在兩段里，那么這兩段可以同時選這一個選項。概括大意__做題方法5（三）概括大意__文章練習概括大意__文章練習

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

2Paragraph2___________

3Paragraph3___________

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

概括大意__文章練習2Inimitatingthebehaviorofonehandwiththeother,thebabymaybebecomingawarethathecandothesamethingwitheacharmandthateachhandisdistinctfromtheother.Thisawarenessisimportanttohisreceivinginformationaboutspace.Thebabyalsobeginstoseehimselfactwhenherepeatedlyreachesforandgraspsthings.Hestartstodistinguishhimselffromtheouterworld.

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

概括大意__文章練習2概括大意__文章練習2文章問題：1Paragraph1___________

2Paragraph2___________

3Paragraph3___________

4Paragraph4___________A.Gesell'smeasureofthebaby'smentalgrowthB.ThebabylearnstosethimselfapartfromtheouterworldthroughplayingwithtoysC.Thebaby'sconfusioninfrontofamirrorD.Significanceofonedevelopmentinababy'slifeE.Thebaby’slovefor“Loveies”indicatesearlymentalresourcefulnessandflexibilityF.Thefunctionsofa“l(fā)ovey”D B A E概括大意__文章練習2二.完成句子一.題型特點二.做題方法三.文章練習完成句子__目錄

1、題型特點：四個不完整句，從6個選項中選出4個正確答案。 這4個題出自文章4段，但不一定都是概括大意的那4段。完成句子__題型特點2、出題特點：第一題出自第一段，最后一題出自最后一段。第一題在第一段沒有找到就到第二段去找，如果找到了，那么第二題就從第三段找起。最后一題在最后一段中沒有，看倒數(shù)第二段。有時會出現(xiàn)一段出兩個題。1.技巧做題法 1)看題干找關鍵詞

2)再看A—F選項找關鍵詞 3)然后到相應的段落找再現(xiàn)詞。 4)找到題干再現(xiàn)的所在句，把整句看完去對A—F選項，

有再現(xiàn)詞的就是答案。如果本句沒有再現(xiàn)詞，就看上下句，甚至整段。2.語法知識做題法

完成句子這個題型也可以通過語法，詞組和句型的知識來做題。完成句子__做題方法EarthAngels1JoyingBresciawas8yearsoldwhenshenoticedthatcigarettebutts(煙頭)werelitteringherhometownbeachinIsleofPalms,SouthCarolina.Whenshelearnedthatittakesfiveyearsfortheremainsofacigarettetodisintegrate,shedecidedtotakeaction.Joyinglauncheda“NoButtsontheBeach”campaign.Sheraisedmoneyandawarenessabouttheneedtokeepthebeachesclean.Withthehelpofothers,Joyingalso完成句子__文章練習1boughtorreceiveddonationsofgallonsizeplasticice-creambuckets.Thebucketswerefilledwithsand,andplacedatallpublicaccessareasofthebeach.Thebucketsallowedpeopletodisposeoftheircigarettesbeforehittingthebeach.Twoyearslater,Joyingsaysthebucketsarefullandthebeachinnearlyfreeofcigarettedebris(殘片).完成句子__文章練習12PeoplewholiveinorvisitSteamboatSprings,Colorado,haveCarterDunhamtothankforanewstatewildliferefugethatpreserves20acresofmarshlandandmanyspeciesofwildlife.CarterandotherstudentswroteamanagementplanfortheareaaroundtheYampaRiver.TheplanwaspartofaclassprojectwhenCarterwasafreshmanatSteamboatSpringsHighSchool.WorkingwiththeColoradoDivisionofWildlife,Carterandhisclassmatesmappedtheareaandspeciesofanimalslivingthere.Theyalsomadedecisionsabout,amongotherthings,wherefencesandparkingareasshouldbebuilt.完成句子__文章練習13BarbaraBrownandherfriendscollectoil.Itstartedasaprojectfortheir4HClubafteroneofthegirlsnoticedherfatherusingmotoroiltokillweedsontheirfarminVictoria,Texas.Theydidsomeresearchanddiscoveredthatoilcancontaminategroundwater—arealdangerinruralareas,wherepeopleliveoffthewaterontheirland.Thegirlsresearchedwaystorecycleoilandworkedwithalocaloilrecyclingcompanyontheissue.Now,the“Don’tBeCrude”programrunsoilcollectionsites—tanksthatholdupto460gallons—wherepeopleinthecommunitycandisposeoftheiroil.完成句子__文章練習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__文章練習127Joyingplacedthebucketsatallpublicaccessareasto

.28PeoplearegratefultoCarterDunhamforhiseffortsto

.29Disposedoilandmanyotheritemscanbereusedto

.30Ryan,withthehelpofothers,isfulfillinghisdreamofhelpAfricanpeopleto

.完成句子__文章練習1AmakenewmaterialsBpreservewetlandandanimalsChavecleanairDhavecleanwaterEcollectcigarettebuttsFcollectdisposedoil EBAD完成句子__文章練習1

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

Theperfectionofvisionandtheabilitytoholdhisheadupallowappreciationofvisualspace.Theevolutionofincreasinglyefficientreachingalsoletsthebabyappreciateandparticipateinhisthree-dimensionalworld.完成句子__文章練習22Youmaynoticethatyourbabycangrab

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

．6ThegreatpotentialagriculturalresourcesofNorthAmericanliesin

．7InU．S．a(chǎn)ndCanada

isconsideredilliterate．8Mexico’srapideconomicdevelopmentinthe1970sisdueto

.完成句子__文章練習3AoilrevenuesBnoneCtheentirepopulationDtheU.S.andsouthernCanadaEintermountainbasinsandplateausFbroadareasofsimilarappearanceandmorphology FDBA完成句子__文章練習3完成句子__文章練習45.Foraslongasthreemonthsofayear,thesun__________ontheice-coveredlandofAlaska.6.Accordingtostatistics,__________ofthetotalareaofAlaskahasbeenusedforfarming.7.AlaskawasoriginallypartofRussia,butwasbought__________.8.GolddidnotbringtoAlaskaasmuchwealth__________.A.asfishdoesB.becauseofitsrichnaturalresourcesC.bytheUnitedStatesinthe19thcenturyD.shinesdayandnightE.onlyaverysmallpercentageF.alimitedamountofthegoldfoundthere通過語法、詞組和句型的知識來做題三.概括大意與完成句子__方法技巧練習概括大意與完成句子__方法技巧練習LearnaboutNobleGases(惰性氣體)1Haveyoueverriddenonaballoon?Manytouristspotsofferballoonridesinorderforpeopletoseethebeautyofaplacefromabove.Aballooncontainsanoblegascalledhelium(氦).Formerly,balloonscontainedhydrogenbuthydrogenisveryflammableanddangerouswhenuncontrolled.Therefore,peopleshiftedtohelium,whichissafer.Heliumissafebecauseithasthepropertiesofthenoblegases.概括大意與完成句子__方法技巧練習1真題2Peopleoncebelievedthatnoblegasescouldn’tchemicallyreactatall.Forthisreason,theywerecalledinertgases(惰性氣體).

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

______.

28.AmongtheelementsofnoblegasesHeliumisthe

_________.

29.Therequirednumberofelectronsinnoblegases’outershellis

__________.

30.MRImaymakeoperatingonthepatient

_______.

概括大意與完成句子__方法技巧練習1真題A.lightestB.reactiveC.importantD.completeE.flammableF.unnecessary概括大意與完成句子__方法技巧練習1真題LearnaboutLight1

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

概括大意與完成句子__方法技巧練習2真題2

In1905,AlbertEinsteinpublishedaresearchpaperinwhichheexplainedwhatisreferredtoasthephotoelectriceffect.Thistheoryexplainsthatparticlesmakeuplight.TheparticlesEinsteinwasreferringtoareweightlessbundles（束）ofelectromagnetic（電磁）energycalledphotons（光子）.Today,scientistsagreethatlighthasadual（二重）nature—itispartparticleandpartwave.Itisaformofenergythatallowsustoseethingsaroundus.概括大意與完成句子__方法技巧練習2真題

3

Thingsthatgiveofflightareknownassourcesoflight.Duringtheday,theprimarysourceoflightisthesun.Othersourcesoflightincludestars,flames,flashlights,streetlampsandglowinggasesinglasstube.概括大意與完成句子__方法技巧練習2真題4

Whenwedrawthewaylighttravelswealwaysusestraightlines.Thisisbecausenormallylightraystravelinastraightline.However,therearesomeinstancesthatcanchangethepathandeventhenatureoflight.Theyarereflection,absorption,interference（干擾）,etc.概括大意與完成句子__方法技巧練習2真題5

Physicistshaveattemptedtomeasurethespeedoflightsincetheearlytimes.In1849,HippolyteFizeauconductedanexperimentbydirectingabeamoflighttoamirrorlocatedkilometersawayandplacedarotatingcogwheel（旋轉齒輪）betweenthebeamandthemirror.Fromtherateofrotationofthewheel,numberofwheel’steethanddistanceofthemirror,hewasabletocalculatethatthespeedoflightis313millionmeterspersecond.Inavacuum（真空）,however,thespeedoflightis299,792,458meterspersec