2015職稱英語(yǔ)考前沖刺第7講

1均為細(xì)節(jié)題；完成句子基本解題思路:線索詞定位法+空格前的接續(xù)詞法thetiniestafractionofanthesameamountofanexplosionofhugethecreationofnewtheexistenceofblackBlackholesareformedafter Whenalargestarexplodes,thegravitycompactseverypieceinto Anewlyformedblackholeandthestaritcomesfromareof AlbertEinstein’stheoryofrelativityhelpstoprove AthetiniestB.afractionofanC.thesameamountof√DanexplosionofhugeEthecreationofnewFtheexistenceofblackBlackholesareformedafter BlackholesScientistshave

canbebestdescribedasasortofvacuum,suckingupeverything inspace.discoveredthatblackholescomefromhugestars.Starsthatareneardeathnolongerburnduetolossoffuel,hydrogenendsupputtingpressureontothestar’ssurfaceuntilitsuddenlyexplodesthencollapses.提示:如果題干中沒有定位線索詞?法定位相關(guān)句或者定位線索詞及空格前的接續(xù)詞/結(jié)構(gòu)?法幫助定位相關(guān)句時(shí),則可以利?被選項(xiàng)中的名詞及名詞短語(yǔ)幫助識(shí)別答案?！藺.thetiniestB.afractionofanC.thesameamountofE.thecreationofnewF.theexistenceofblackWhenalargestarexplodes,thegravitycompactseverypieceinto 解題思路:Blackholescomefromstarsthataremadeofhydrogen,othergasesandafewmetals.theseexplodeitcanturnintoa lar-mass(恒星質(zhì)量)blackhole,whichcanonlyoccurifthestarlargeenough(shouldbebiggerthanthesun)fortheexplosiontobreakitintopieces,andgravitystartstocompacteverypieceintothetiniestparticle.Trytoseeandcompare:ifastarthat’stentimesthesizeofthesunendsupbeingablackholethat’sonlyafractionofaninch!B.afractionofan√C.thesameamountofE.thecreationofnewF.theexistenceofblackAnewlyformedblackholeandthestaritcomesfromare 解題思路:Objectsthatgetsuckedinablackholewillalwaysremainthere,nevertobreak .Butrememberthatblackholescanonlygobbleup(吞噬)objectswithinaspecificdistancetoit.It’spossibleforalargestarnearthesuntoeablackhole,butthesunwillcontinuetostayin Orbits(軌道)donotchangebecausethenewlyformedblackholecontainsexactlythesameamountofmassaswhenitwasastar,onlythistimeitsmassistotallycontractedthatitcanendupasnobiggerthana典型考題分析：2013年理工A/BBlackB.afractionofanE.thecreationofnew√F.theexistenceofblackAlbertEinstein’stheoryofrelativityhelpstoprove 解題思路:Sofar,astronomershavefiguredoutthatblackholesexistbecauseofAlbertEinstein’stheoryofrelativity.Intheend,throughnumerousstudies,theyhavediscoveredthatblackholestrulyHaveyoueverriddenonaballoon?Manytouristspotsofferballoonridesinorderforpeopletoseethebeautyofacefromabove.Aballooncontainsanoblegascalledum(氦).Formerly,balloonscontainedhydrogenbuthydrogenisveryflbleanddangerouswhenuncontrolled.Therefore,peopleshiftedtohelium,whichissafer.Heliumissafebecauseithasthepropertiesofthenoblegases.Peopleoncebellevedthatnoblegasescouldn’tchemicallyreactatall.Forthisreason,theywerecalledinertgases(惰性氣體).TheywerealsolistedunderGroup0intheoldperiodictablebecausescientistsbelievedthatthegaseshavezerovalence(價(jià))electronsintheirouters.Thiswaslaterproventobeuntruewhensomenoblegascompoundswerediscovered.Thegasesareelements,whichsharesimilarproperties.Thesepropertiesincludebeingmonoatomic,colorless,odorless,beingabletoconductelectricity,andhavinglowchemicalreactivity.NoblegasesincludeHelium,Neon,Argon,Krypton,XenonandRadon.TheseareallfoundinGroup18,intherightmostcolumnoftheperiodictable.Ifyoulookattheperiodictable,youwillnoticethattheseelementsaretheonlyones,whichdonothaveacharge.Heliumhasthelowestmolecular(分子的)weightwhileRadonistheheaviest.Rememberthatchemicalreactionsoccurbecauseatomshavevalenceelectrons,whichareelectronsintheirouters.Whentheoutersis“unfilled”ortherequirednumberofelectronsisnotyetcomplete,theatomismorereactive.Noblegaseshaveafullouters,meaningthattheyhavecompleteelectronsintheirouters.Thiscompletenumbervaries.Forinstance,theoutersofHeliumhas2valenceelectronswhiletheoutersofXenonhas8electrons.Nowadays,thereremainstobeafewnoblegasesbecauseofthelowchemicalreactivityofthesesaidgases.becauseoftheirproperties,noblegaseshavemanyimportantapplicationsTheyarewidelyusedinmedicineandindustries.Forinstance,liquidHeliumisusedforsuperconductingmagnets(磁體).Thesemagnetsareveryimportantinphysicsandmedicine.Whenadoctorsthata’sbrainhasbeendamaged,hemightrequestforMagneticImaging(MRI).MRIallowsthedoctorto“see”thebrain,withoutoperatingontheNoblegasesarenotvery AmongtheelementsofnoblegasesHeliumis Therequirednumberofelectronsinnoblegases’outers MRImaymakeoperatingonthe √B.C.D.E.flNoblegasesarenotvery Haveyoueverriddenonaballoon?Manytouristspotsofferballoonridesinorderforpeopletoseethebeautyofacefromabove.Aballooncontainsanoblegascalledum(氦).Formerly,balloonscontainedhydrogenbuthydrogenisveryflbleanddangerouswhenuncontrolled.Therefore,peopleshiftedtohelium,whichissafer.Heliumissafebecauseithasthepropertiesofthenoblegases.Peopleoncebelievedthatnoblegasescouldn’tchemicallyreactatall.Forthisreason,theywerecalledinertgases(惰性氣體).TheywerealsolistedunderGroup0intheoldperiodictablebecausescientistsbelievedthatthegaseshavezerovalence(價(jià))electronsintheirouters.Thiswaslaterproventobeuntruewhensomenoblegascompoundswerediscovered.√A.AmongtheelementsofnoblegasesHeliumis Peopleoncebelievedthatnoblegasescouldn’tchemicallyreactatall（）Forthisreason,theywerecalledinertgases(惰性氣體).TheywerealsolistedunderGroup0intheoldperiodictablebecausescientistsbelievedthatthegaseshavezerovalence(價(jià))electronsintheirouters.ThiswaslaterproventobeuntruewhensomenoblegascompoundswereThegasesareelements,whichsharesimilarproperties.Thesepropertiesincludebeingmonoatomic,colorless,odorless,beingabletoconductelectricity,andhavinglowchemicalreactivity.NoblegasesincludeHelium,NeonArgon,Krypton,XenonandRadon.TheseareallfoundinGroup18,intherightmostcolumnoftheperiodictable.Ifyoulookattheperiodictable,youwillnoticethattheseelementsaretheonlyones,whichdonothaveacharge.Heliumhasthelowestmolecular(分子的)weightwhileRadonistheheaviest.C.√D.E. Therequirednumberofelectronsinnoblegases’outer Thegasesareelements,whichsharesimilarproperties.Thesepropertiesincludebeingmonoatomic,colorless,odorless,beingabletoconductelectricity,andhavinglowchemicalreactivity.NoblegasesincludeHelium,Neon,Argon,Krypton,XenonandRadon.TheseareallfoundinGroup18,intherightmostcolumnoftheperiodictable.Ifyoulookattheperiodictable,youwillnoticethattheseelementsaretheonlyones,whichdonothaveacharge.Heliumhasthelowestmolecular(分子的)weightwhileRadonistheheaviest（第三題判斷答案的依據(jù)）.Rememberthatchemicalreactionsoccurbecauseatomshavevalence（價(jià)）electrons,areelectrons（電子）intheirouters.Whentheoutersis“unfilled”ortherequirednumberofelectronsisnotyetcomplete,theatomismorereactive.Noblegaseshaveafullouters,meaningthattheyhavecompleteelectronsintheirouters.Thiscompletenumbervaries.Forinstance,theoutersofHeliumhas2valenceelectronswhiletheoutersofXenonhas8electrons.Nowadays,thereremainstobeafewnoblegasesbecauseofthelowchemicalreactivityofthesesaidgases.C.E.flMRImaymakeoperatingonthepatientRememberthatchemicalreactionsoccurbecauseatomshavevalenceelectrons,whichareelectronsintheirouters.Whentheoutersis“unfilled”ortherequirednumberofelectronsisnotyetcomplete,theatomismorereactive.（第三題判斷答案的依據(jù)）Noblegaseshaveafullouters,meaningthattheyhavecompleteelectronsintheirouters.Thiscompletenumbervaries.Forinstance,theoutersofHeliumhas2valenceelectronswhiletheoutersofXenonhas8electrons.Nowadays,thereremainstobeafewnoblegasesbecauseofthelowchemicalreactivityofthesesaidgases.becauseoftheirproperties,noblegaseshavemanyimportantapplications.Theyarewidelyusedinmedicineandindustries.Forinstance,liquidHeliumisusedforsuperconductingmagnets(磁體).Thesemagnetsareveryimportantinphysicsandmedicine.Whenadoctorsthata’sbrainhasbeendamaged,hemightrequestforMagneticResonanceImaging(MRI).MRIallowsthedoctorto“see”thebrain,withoutoperatingonthepatient.C.E.fl30.MRImaymakeoperatingonthepatientRememberthatchemic