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在允许加热的条件下，只用一种试剂就可以鉴别硫酸铵、氯化钾、氯化镁、硫酸铝和硫酸铁溶液，这种试剂是( )。
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在允许加热的条件下只用一种试剂就可以鉴别NH42SO4KClMgCl2Al2SO43和Fe2SO43
NaOH
NH
3
·H
2
O
AgNO
3
BaCl
2
在允许加热的条件下只用一种试剂就可以鉴别硫酸铵氯化钾氯化镁硫酸铝和硫酸铁溶液这种试剂是
NaOH
NH
3
•H
2
O
AgNO
3
KSCN
现有①氯化钾②硫酸镁③氢氧化钾④氯化铜四种溶液不用其他试剂仅用观察法和相互反应就可以区别开则鉴别开的
③②①④
④③②①
④②③①
②①③④
现有硫酸钠氯化铵氯化钠硫酸铵四种无色溶液只用一种试剂且各取一次将它们鉴别开来可加热这种试剂是
盐酸
碳酸钠溶液
氢氧化钡溶液
氢氧化钠溶液
在允许加热的条件下只用一种试剂就可以鉴别硫酸铵氯化钾氯化镁硫酸铝和硫酸铁溶液这种试剂是
NaOH
NH
3
·H
2
O
AgNO
3
BaCl
2
不可以在葡萄马铃薯茶树甜菜等忌氯作物上施用的肥料是
硫酸钾
氯化钾
氯化铵
硫酸铵
下列各组物质只用一种试剂括号内物质及相互之间的反应不能鉴别开来的是
固体：食盐、硝酸铵、烧碱（水）
固体：硫酸铜、熟石灰、碳酸钙（稀盐酸）
溶液：纯碱、食盐、盐酸（酚酞试液）
溶液：氯化钠、氯化钾、硫酸钾（硝酸银溶液）
下列鉴别物质所使用的试剂或方法正确的是
CO和CO
2
—— 看颜色，闻气味
氧气和氮气 —— 燃着的木条
硫酸铵和氯化钾 —— 加水看溶解性
稀硫酸和氯化钠溶液 ——酚酞溶液
下列各组溶液不用其它试剂就可以将它们区别开的是
盐酸、氯化钾、硫酸钾、碳酸钾
氢氧化钾、碳酸钾、硫酸镁、硫酸氢钾
氯化钡、硝酸钡、硫酸钠、硝酸钾
硝酸钠、盐酸、氯化铵、氢氧化钾
在允许加热的条件下只用一种试剂就可以鉴别硫酸铵氯化钾氯化镁硫酸铝和硫酸铁溶液这种试剂是
AgNO
3
BaCl
2
NaOH
氨水
在允许加热的条件下只用一种试剂就可以鉴别NH42SO4KClMgCl2Al2SO43和Fe2SO43
NaOH
NH
3
·H
2
O
AgNO
3
BaCl
2
允许加热的条件下只用一种试剂就可以鉴别硫酸铵氯化钾氯化镁硫酸铝和硫酸铁溶液下列溶液中可选用的是
NH
3
•H
2
O
NaOH
AgNO
3
BaCl
2
有一包化学肥料可能是硫酸铵碳酸氢铵过磷酸钙氯化钾中的一种取少量样品观察到其外观为白色晶体加水后能全部
氯化钾
碳酸氢铵
硫酸铵
过磷酸钙
为鉴别硫酸钾氢氧化钡盐酸氯化钾氢氧化钾五种无色溶液先加入一种试剂鉴别出一种物质并把未鉴别出的物质分
有一包化学肥料可能是硫酸铵碳酸氢铵硝酸铵氯化钾中的一种．取少量样品与熟石灰混合研磨没有刺激性气体放
氯化钾
碳酸氢铵
硫酸铵
硝酸铵
在允许加热的条件下只用一种试剂就可以鉴别硫酸铵氯化钾氯化镁硫酸铝和硫酸铁溶液这种试剂是
NaOH
NH
3
・H
2
O
AgNO
3
BaCl
2
只用一种试剂就可以鉴别氢氧化钠溶液氢氧化钙溶液稀硫酸这种试剂是
石蕊试液
酚酞试液
碳酸钠溶液
氯化铵溶液
只用一种试剂就可以鉴别氯化钾氯化镁硫酸铝和硫酸铁溶液这种试剂是
NaCl
HCl
NH
3
·H
2
O
NaOH
只用一种试剂就可一次性鉴别稀硫酸氢氧化钾溶液氯化钙溶液的是
氯化钾溶液
碳酸钾溶液
稀盐酸
硝酸钠溶液
在允许加热的条件下只用一种试剂就可以鉴别硫酸铵氯化钾氯化镁和硫酸铁溶液这种试剂是
NaOH
Na
2
CO
3
AgNO
3
BaCl
2
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IamSergeyBrin!IwasborninMoscow.In1979whenIwas5myfamilyimmigratedtotheU.S.A.California.Irememberthatonmy9thbirthdayIgotmyfirstcomputerCommodore64.LaterIgraduatedwithhonorsintheUniversityofMarylandinMathematicsandIT.Themainfieldofmyscienceresearchwasthetechnologiesusedtocollectdatafromunsystematicsourcesaswellaslargequantitiesoftextsandsciencedata.IwastheauthorofdozensofarticlesinleadingAmericanacademicmagazines.Thegreatesteventinmylifehappenedwhenin1998Iwaspreparingforthedefense论文答辩ofmyDoctor’sdegreeinStanfordUniversity.TherethefatemadememeetLarryPage—ayoungcomputergenius.Larrybelongedtotheintellectual知识分子society.LarryandIquicklybecamefriendswhenweworkedtogether.WeweresearchingdayandnightontheInternet.Wewerefindingalotofinformationbutwiththefeelingwestillcouldn’tfindenoughofwhatwewerelookingfor.Naturallytheideaforasearchenginethatwouldallowspecificinformationtobefoundintheendlesspoolofdatawasbornlikeitcametous.Itwasn’tourplansbutwegaveuptheeducationattheuniversity.Youknowthenextpartmaybe—wemanagedtoturnanordinarygarageinMeploParkCaliforniatheU.S.A.intoourfirstofficeinwhichGooglewasborn.WithexcitementwetypedthenameofthethingwhichwecreatedwithloveonSeptember14th1998—www.Google.com.Nowafterthoseyearsweboughtthisgarage.Asasymbolitwillalwaysremindusthateverythingispossible.WhydidtheyfoundGoogle
Fromchildhoodtooldagewealluselanguageasameansofbroadeningourknowledgeofourselvesandtheworldaboutus.Whenhumansfirst16theywerelikenewbornchildrenunabletousethis17tool.Yetoncelanguagedevelopedthepossibilitiesforhumankind’sfuture18andculturalgrowthincreased.Manylinguistsbelievethatevolutionis19forourabilitytoproduceanduselanguage.They20thatourhighlyevolvedbrainprovidesus21aninnatelanguageabilitynotfoundinlower22.Proponentsofthisinnatenesstheorysaythatour23forlanguageisinbornbutthatlanguageitselfdevelopsgradually24afunctionofthegrowthofthebrainduringchildhood.Thereforetherearecritical25timesforlanguagedevelopment.Current26oftheinnatenesstheoryaremixed;howeverevidencesupportingtheexistenceofsomeinnateabilitiesisundeniable.27moreandmoreschoolsarediscoveringthatforeignlanguagesarebesttaughtin28grades.Youngchildrenoftencanlearnseverallanguagesbybeing29tothemwhileadultshaveamuchhardertimelearninganotherlanguageoncethe30oftheirfirstlanguagehavebecomefirmlyfixed.31someaspectsoflanguageareundeniablyinnatelanguagedoesnotdevelopautomaticallyinavacuum.Childrenwhohavebeen32fromotherhumanbeingsdonotpossesslanguage.Thisdemonstratesthat33withotherhumanbeingsisnecessaryforproperlanguagedevelopment.Somelinguistsbelievethatthisisevenmorebasictohumanlanguage34thananyinnatecapacities.Thesetheoristsviewlanguageasimitativelearnedbehavior.35childrenlearnlanguagefromtheirparentsbyimitatingthem.Parentsgraduallyshapetheirchild’slanguageskillsbypositivelyreinforcingpreciseimitationsandnegativelyreinforcingimpreciseones.Ⅱ．完形填空/Cloze阅读下列短文掌握其大意然后从每小题所给的四个选项ABCD中选出最佳选项
Amiddle-agedmanwithalongbeardwasarrestedbythepolicefordisorderlyconductandpropertydamage.Morechargesmightheaddedlatersaidapoliceofficer.ThemanidentifiedasBillWildcheckedintotheMotelFivelastnightaboutanhouraftersunset.Tellingtheclerkthathewouldbestayingfournightshepaidcashinadvance.ShesaidthatthenearestgrocerystorewasJohn-Johnswhichwasonlytwoblocksaway.ThepolicesaidthatWildwenttoJohn-Johnsandpurchasedthreegallonsofhoneyandfourgallonsofchocolatesyrup糖浆.Thecheckeraskedhimwhattheoccasionwas.HerepliedI’mtryingtobecomeasweeterperson.Thecheckersmiledatthejoke.Wilddrovebacktothemotel.Heopenedallsevencontainersandpouredthemintothebathtub.Headdedwarmwatertothemix.Thenheplacedhisboomboxonthebathroomfloornexttothetub.Hetunedtheradiotoanoperastation.Hegotundressedhoppedintothetubandstartedsingingloudlywiththemusic.Fifteenminuteslaterthelodgersintheroomnextdoorphonedtheclerk.ShebangedonWild’sdoorbuthekeptsinging.Shephonedhisroombuthedidn’tanswer.Thenshecalledthepolicewhoarrivedquickly.Wellatleasthepaidinadvancesaidtheclerk.Thatmoneywillhelppayfortheplumber管子工.Thebathtubdrainwascompletelyclogged阻塞.Thetubremainedfullofchocolateandhoney.Youjustneverknowaboutpeoplesaidtheclerk.Heseemedsoniceandfriendly.Who’dhavethoughthewasabathtub-singingnutThepolicesaidthiswasthethirdtimethatWildhadbeenarrestedforthiskindofbehavior.WhatdoyouthinkofBillWildWhyPleaseanswerwithin30words
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Theevidenceforharmonymaynotbeobviousinsomefamilies.Butitseemsthatfouroutoffiveyoungpeoplenowgetonwiththeirparentswhichistheoppositeofthepopularly-heldimage形象ofunhappyteenagerslockedintheirroomafterendlessfamilyquarrels.Animportantnewstudyintoteenageattitudessurprisinglyshowsthattheirfamilylifeismoreharmoniousthanithaseverbeeninthepast.Weweresurprisedbyjusthowpositivetoday’syoungpeopleseemtobeabouttheirfamiliessaidonememberoftheresearchteamThey’reexpectedtoberebellious叛逆的andselfishbutactuallytheyhaveotherthingsontheirminds:theywantacarandmaterialgoodsandtheyworryaboutwhetherschoolisservingthemwell.There’smorenegotiation商议anddiscussionbetweenparentsandchildrenandchildrenexpecttotakepartinthefamilydecision-makingprocess.Theydon’twanttorocktheboat.Soitseemsthatthisgenerationofparentsismuchmorelikelythanparentsof30yearsagototreattheirchildrenasfriends.Myparentsarehappytodiscussthingswithmeandwillingtolistentomesays17-year-oldDanielLazallIalwaystellthemwhenI’mgoingoutclubbing.AslongastheyknowwhatI’mdoingthey’refinewithit.SusanCromewhoisnow21agrees.Lookingbackonthelast10yearstherewasalotofwhatyoucouldcallnegotiation.ForexampleaslongasI’ddoneallmyhomeworkIcouldgooutonaSaturdaynight.ButIthinkmygrandparentswerealotstricterwithmyparentsthanthat.Maybethispositiveviewoffamilylifeshouldnotbeunexpected.Itispossiblethattheideaofteenagerebellionisnotrootedinrealfacts.AresearchercommentsOursurprisethatteenagerssaytheygetalongwellwiththeirparentscomesbecauseofabriefperiodinoursocialhistorywhenteenagerswereregardedasdifferentbeings.Butthatideaofrebellingandbreakingawayfromtheirparentsreallyonlyhappenedduringthatonetimeinthe1960swheneveryonerebelled.Thenormalsituationthroughouthistoryhasbeenasmoothchangefromhelpingoutwiththefamilybusinesstotakingitover./Comparedwithparentsof30yearsagotoday’sparents______.
Fromthehealthpointofviewwearelivinginamarvelousage.Weareimmunizedfrombirthagainstmanyofthemostdangerousdiseases.Alargenumberofoncefatalillnessescannowbecuredbymoderndrugsandsurgery.Itisalmostcertainthatonedayremedieswillbefoundforthemoststubbornremainingdiseases.Theexpectationoflifehasincreasedenormously.Butthoughthepossibilityoflivingalongandhappylifeisgreaterthaneverbeforeeverydaywewitnesstheincredibleslaughterofmenwomenandchildrenontheroads.Manversusthemotorcar!Itisanever-endingbattlewhichmanislosing.Thousandsofpeopleovertheworldarekilledorhorriblykilledeachyearandwearequietlysittingbackandlettingithappen.Ithasbeenrightlysaidthatwhenamanissittingbehindasteeringwheelhiscarbecomestheextensionofhispersonality.Thereisnodoubtthatthemotorcaroftenbringsoutaman’sveryworstqualities.Peoplewhoarenormallyquietandpleasantmaybecomeunrecognizablewhentheyarebehindasteering-wheel.Theysweartheyareill-manneredandaggressivewillfulastwo-year-oldsandutterlyselfish.Alltheirhiddenfrustrationsdisappointmentsandjealousiesseemtobebroughttothesurfacebytheactofdriving.Thesurprisingthingisthatsocietysmilessobenignlyonthemotoristandseemstocondonehisbehaviour.Everythingisdoneforhisconvenience.Citiesareallowedtobecomealmostuninhabitablebecauseofheavytraffic;townsaremadeuglybyhugecarparks;thecountrysideisdesecratedbyroadnetworks;andthemassannualslaughterbecomesnothingmorethanastatistictobeconvenientlyforgotten.Itishightimeaworldcodewerecreatedtoreducethissenselesswasteofhumanlife.Withregardtodrivingthelawsofsomecountriesarenotoriouslylaxandeventhestrictestarenotstrict:enough.Acodewhichwasuniversallyacceptedcouldonlyhaveadramaticallybeneficialeffectontheaccidentrate.Hereareafewexamplesofsomeofthethingsthatmightbedone.Thedrivingtestshouldbestandardizedandmadefarmoredifficultthanitis;allthedriversshouldbemadetotakeatesteverythreeyearsorso;theageatwhichyoungpeopleareallowedtodriveanyvehicleshouldheraisedtoatleast21;allvehiclesshouldbeputthroughstringentannualtestsforsafety.Eventhesmallestamountofalcoholinthebloodcanimpairaperson’sdrivingability.Presentdrinkinganddrivinglawswheretheyexistshouldhemadmuchstricter.Maximumandminimumspeedlimitsshouldbeimposedonallroads.GovernmentsshouldlaydownsafetyspecificationsformanufacturersashasbeendoneintheUSA.Alladvertisingstressingpowerandperformanceshouldbebanned.Thesemeasuresmaysoundinordinatelyharsh.Butsurelynothingshouldbeconsideredassevereifitresultsinreducingtheannualtollofhumanlife.Afteralltheworldisforhumanbeingsnotmotorcars.Whatdoestheauthorthinkofsocietytowardmotorists
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Fromchildhoodtooldagewealluselanguageasameansofbroadeningourknowledgeofourselvesandtheworldaboutus.Whenhumansfirst16theywerelikenewbornchildrenunabletousethis17tool.Yetoncelanguagedevelopedthepossibilitiesforhumankind’sfuture18andculturalgrowthincreased.Manylinguistsbelievethatevolutionis19forourabilitytoproduceanduselanguage.They20thatourhighlyevolvedbrainprovidesus21aninnatelanguageabilitynotfoundinlower22.Proponentsofthisinnatenesstheorysaythatour23forlanguageisinbornbutthatlanguageitselfdevelopsgradually24afunctionofthegrowthofthebrainduringchildhood.Thereforetherearecritical25timesforlanguagedevelopment.Current26oftheinnatenesstheoryaremixed;howeverevidencesupportingtheexistenceofsomeinnateabilitiesisundeniable.27moreandmoreschoolsarediscoveringthatforeignlanguagesarebesttaughtin28grades.Youngchildrenoftencanlearnseverallanguagesbybeing29tothemwhileadultshaveamuchhardertimelearninganotherlanguageoncethe30oftheirfirstlanguagehavebecomefirmlyfixed.31someaspectsoflanguageareundeniablyinnatelanguagedoesnotdevelopautomaticallyinavacuum.Childrenwhohavebeen32fromotherhumanbeingsdonotpossesslanguage.Thisdemonstratesthat33withotherhumanbeingsisnecessaryforproperlanguagedevelopment.Somelinguistsbelievethatthisisevenmorebasictohumanlanguage34thananyinnatecapacities.Thesetheoristsviewlanguageasimitativelearnedbehavior.35childrenlearnlanguagefromtheirparentsbyimitatingthem.Parentsgraduallyshapetheirchild’slanguageskillsbypositivelyreinforcingpreciseimitationsandnegativelyreinforcingimpreciseones.Ⅱ．完形填空/Cloze阅读下列短文掌握其大意然后从每小题所给的四个选项ABCD中选出最佳选项
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Howshouldoneinvestasumofmoneyinthesedaysofinflation通货膨胀Leftinabankitwillhardlykeepitsvaluehoweverhightheinterestrateis.OnlyabravemanoraveryrichonedarestobuyandsellontheStockMarket.Todayitseemsthatoneofthebestwaystoprotectyoursavingsandevenincreaseyourwealthistobuybeautifulobjectsfromthepast.HereIamgoingtooffersomeadviceoncollectingantiqueclockswhichIpersonallyconsiderareamongthemostinterestingofantiques.Isometimeswonderwhatabeingfromanotherplanetmightreportbackaboutourwayoflife.TheplanetEarthisruledbyamysteriouscreaturethatsitsorstandsinaroomandmakesastrangetickingsound.Ithasafacewithtwelveblackmarksandtwohands.Mencandonothingwithoutitspermissionanditfastensitsyoungroundpeople’swristssothateverywheremengotheyarestillunderitscontrol.ThiscreatureistherealmasterofEarthandmenareitsslaves.Whetherornotweareslavesoftimetodaydependsonourcultureandpersonalitybutitisbelievedthatmanyyearsagokingskeptspecialslavestotellthetime.Certainmenwereverycleveratmeasuringthetimeofdayaccordingtothebeatingoftheirownhearts.Theyweremadetostandinafixedplaceandeveryhourorsowouldshoutthetime.Soitseemsthatthefirstclockswerehumanbeings.Howevermenquicklyfoundmoreconvenientandreliablewaysoftellingthetime.Theylearnedtousetheshadowscastbythesun.Theymarkedthehoursoncandlesusedsandinhourglassesandinventedwater-clocks.Indeedanyseriousstudentofantiquesshouldspendasmuchtimeaspossiblevisitingpalacesstatelyhomesandmuseumstoseesomeofthefinestexamplesofclocksfromthepast.Antiqueclockscouldbeveryexpensivebutoneofthejoysofcollectingclocksisthatitisstillpossibletofindquitecheaponesforyourownhome.AfterallifyouaregoingtoberuledbythetimewhynotinvestinairantiqueclockandperhapsmakeafutureprofitWhichofthefollowingisNOTmentionedasawaytomeasurethetime
—Didtheytellyouthefinaldecisionofthecommittee—Notheydidn'tbutIthinkIoughtto______.
Amiddle-agedmanwithalongbeardwasarrestedbythepolicefordisorderlyconductandpropertydamage.Morechargesmightheaddedlatersaidapoliceofficer.ThemanidentifiedasBillWildcheckedintotheMotelFivelastnightaboutanhouraftersunset.Tellingtheclerkthathewouldbestayingfournightshepaidcashinadvance.ShesaidthatthenearestgrocerystorewasJohn-Johnswhichwasonlytwoblocksaway.ThepolicesaidthatWildwenttoJohn-Johnsandpurchasedthreegallonsofhoneyandfourgallonsofchocolatesyrup糖浆.Thecheckeraskedhimwhattheoccasionwas.HerepliedI’mtryingtobecomeasweeterperson.Thecheckersmiledatthejoke.Wilddrovebacktothemotel.Heopenedallsevencontainersandpouredthemintothebathtub.Headdedwarmwatertothemix.Thenheplacedhisboomboxonthebathroomfloornexttothetub.Hetunedtheradiotoanoperastation.Hegotundressedhoppedintothetubandstartedsingingloudlywiththemusic.Fifteenminuteslaterthelodgersintheroomnextdoorphonedtheclerk.ShebangedonWild’sdoorbuthekeptsinging.Shephonedhisroombuthedidn’tanswer.Thenshecalledthepolicewhoarrivedquickly.Wellatleasthepaidinadvancesaidtheclerk.Thatmoneywillhelppayfortheplumber管子工.Thebathtubdrainwascompletelyclogged阻塞.Thetubremainedfullofchocolateandhoney.Youjustneverknowaboutpeoplesaidtheclerk.Heseemedsoniceandfriendly.Who’dhavethoughthewasabathtub-singingnutThepolicesaidthiswasthethirdtimethatWildhadbeenarrestedforthiskindofbehavior.WhichsentenceinthepassagecanbereplacedbythefollowingoneHelookssokindandamicablethatwehadneverthoughthewasamadmanwholikestosinginbathtub.
Theevidenceforharmonymaynotbeobviousinsomefamilies.Butitseemsthatfouroutoffiveyoungpeoplenowgetonwiththeirparentswhichistheoppositeofthepopularly-heldimage形象ofunhappyteenagerslockedintheirroomafterendlessfamilyquarrels.Animportantnewstudyintoteenageattitudessurprisinglyshowsthattheirfamilylifeismoreharmoniousthanithaseverbeeninthepast.Weweresurprisedbyjusthowpositivetoday’syoungpeopleseemtobeabouttheirfamiliessaidonememberoftheresearchteamThey’reexpectedtoberebellious叛逆的andselfishbutactuallytheyhaveotherthingsontheirminds:theywantacarandmaterialgoodsandtheyworryaboutwhetherschoolisservingthemwell.There’smorenegotiation商议anddiscussionbetweenparentsandchildrenandchildrenexpecttotakepartinthefamilydecision-makingprocess.Theydon’twanttorocktheboat.Soitseemsthatthisgenerationofparentsismuchmorelikelythanparentsof30yearsagototreattheirchildrenasfriends.Myparentsarehappytodiscussthingswithmeandwillingtolistentomesays17-year-oldDanielLazallIalwaystellthemwhenI’mgoingoutclubbing.AslongastheyknowwhatI’mdoingthey’refinewithit.SusanCromewhoisnow21agrees.Lookingbackonthelast10yearstherewasalotofwhatyoucouldcallnegotiation.ForexampleaslongasI’ddoneallmyhomeworkIcouldgooutonaSaturdaynight.ButIthinkmygrandparentswerealotstricterwithmyparentsthanthat.Maybethispositiveviewoffamilylifeshouldnotbeunexpected.Itispossiblethattheideaofteenagerebellionisnotrootedinrealfacts.AresearchercommentsOursurprisethatteenagerssaytheygetalongwellwiththeirparentscomesbecauseofabriefperiodinoursocialhistorywhenteenagerswereregardedasdifferentbeings.Butthatideaofrebellingandbreakingawayfromtheirparentsreallyonlyhappenedduringthatonetimeinthe1960swheneveryonerebelled.Thenormalsituationthroughouthistoryhasbeenasmoothchangefromhelpingoutwiththefamilybusinesstotakingitover./Whatisthepopularimageofteenagerstoday
When______helponeoftensaysThankyouorIt'skindofyou.
Fromchildhoodtooldagewealluselanguageasameansofbroadeningourknowledgeofourselvesandtheworldaboutus.Whenhumansfirst16theywerelikenewbornchildrenunabletousethis17tool.Yetoncelanguagedevelopedthepossibilitiesforhumankind’sfuture18andculturalgrowthincreased.Manylinguistsbelievethatevolutionis19forourabilitytoproduceanduselanguage.They20thatourhighlyevolvedbrainprovidesus21aninnatelanguageabilitynotfoundinlower22.Proponentsofthisinnatenesstheorysaythatour23forlanguageisinbornbutthatlanguageitselfdevelopsgradually24afunctionofthegrowthofthebrainduringchildhood.Thereforetherearecritical25timesforlanguagedevelopment.Current26oftheinnatenesstheoryaremixed;howeverevidencesupportingtheexistenceofsomeinnateabilitiesisundeniable.27moreandmoreschoolsarediscoveringthatforeignlanguagesarebesttaughtin28grades.Youngchildrenoftencanlearnseverallanguagesbybeing29tothemwhileadultshaveamuchhardertimelearninganotherlanguageoncethe30oftheirfirstlanguagehavebecomefirmlyfixed.31someaspectsoflanguageareundeniablyinnatelanguagedoesnotdevelopautomaticallyinavacuum.Childrenwhohavebeen32fromotherhumanbeingsdonotpossesslanguage.Thisdemonstratesthat33withotherhumanbeingsisnecessaryforproperlanguagedevelopment.Somelinguistsbelievethatthisisevenmorebasictohumanlanguage34thananyinnatecapacities.Thesetheoristsviewlanguageasimitativelearnedbehavior.35childrenlearnlanguagefromtheirparentsbyimitatingthem.Parentsgraduallyshapetheirchild’slanguageskillsbypositivelyreinforcingpreciseimitationsandnegativelyreinforcingimpreciseones.Ⅱ．完形填空/Cloze阅读下列短文掌握其大意然后从每小题所给的四个选项ABCD中选出最佳选项
Theevidenceforharmonymaynotbeobviousinsomefamilies.Butitseemsthatfouroutoffiveyoungpeoplenowgetonwiththeirparentswhichistheoppositeofthepopularly-heldimage形象ofunhappyteenagerslockedintheirroomafterendlessfamilyquarrels.Animportantnewstudyintoteenageattitudessurprisinglyshowsthattheirfamilylifeismoreharmoniousthanithaseverbeeninthepast.Weweresurprisedbyjusthowpositivetoday’syoungpeopleseemtobeabouttheirfamiliessaidonememberoftheresearchteamThey’reexpectedtoberebellious叛逆的andselfishbutactuallytheyhaveotherthingsontheirminds:theywantacarandmaterialgoodsandtheyworryaboutwhetherschoolisservingthemwell.There’smorenegotiation商议anddiscussionbetweenparentsandchildrenandchildrenexpecttotakepartinthefamilydecision-makingprocess.Theydon’twanttorocktheboat.Soitseemsthatthisgenerationofparentsismuchmorelikelythanparentsof30yearsagototreattheirchildrenasfriends.Myparentsarehappytodiscussthingswithmeandwillingtolistentomesays17-year-oldDanielLazallIalwaystellthemwhenI’mgoingoutclubbing.AslongastheyknowwhatI’mdoingthey’refinewithit.SusanCromewhoisnow21agrees.Lookingbackonthelast10yearstherewasalotofwhatyoucouldcallnegotiation.ForexampleaslongasI’ddoneallmyhomeworkIcouldgooutonaSaturdaynight.ButIthinkmygrandparentswerealotstricterwithmyparentsthanthat.Maybethispositiveviewoffamilylifeshouldnotbeunexpected.Itispossiblethattheideaofteenagerebellionisnotrootedinrealfacts.AresearchercommentsOursurprisethatteenagerssaytheygetalongwellwiththeirparentscomesbecauseofabriefperiodinoursocialhistorywhenteenagerswereregardedasdifferentbeings.Butthatideaofrebellingandbreakingawayfromtheirparentsreallyonlyhappenedduringthatonetimeinthe1960swheneveryonerebelled.Thenormalsituationthroughouthistoryhasbeenasmoothchangefromhelpingoutwiththefamilybusinesstotakingitover./Whatisthepassagemainlyabout
Howshouldoneinvestasumofmoneyinthesedaysofinflation通货膨胀Leftinabankitwillhardlykeepitsvaluehoweverhightheinterestrateis.OnlyabravemanoraveryrichonedarestobuyandsellontheStockMarket.Todayitseemsthatoneofthebestwaystoprotectyoursavingsandevenincreaseyourwealthistobuybeautifulobjectsfromthepast.HereIamgoingtooffersomeadviceoncollectingantiqueclockswhichIpersonallyconsiderareamongthemostinterestingofantiques.Isometimeswonderwhatabeingfromanotherplanetmightreportbackaboutourwayoflife.TheplanetEarthisruledbyamysteriouscreaturethatsitsorstandsinaroomandmakesastrangetickingsound.Ithasafacewithtwelveblackmarksandtwohands.Mencandonothingwithoutitspermissionanditfastensitsyoungroundpeople’swristssothateverywheremengotheyarestillunderitscontrol.ThiscreatureistherealmasterofEarthandmenareitsslaves.Whetherornotweareslavesoftimetodaydependsonourcultureandpersonalitybutitisbelievedthatmanyyearsagokingskeptspecialslavestotellthetime.Certainmenwereverycleveratmeasuringthetimeofdayaccordingtothebeatingoftheirownhearts.Theyweremadetostandinafixedplaceandeveryhourorsowouldshoutthetime.Soitseemsthatthefirstclockswerehumanbeings.Howevermenquicklyfoundmoreconvenientandreliablewaysoftellingthetime.Theylearnedtousetheshadowscastbythesun.Theymarkedthehoursoncandlesusedsandinhourglassesandinventedwater-clocks.Indeedanyseriousstudentofantiquesshouldspendasmuchtimeaspossiblevisitingpalacesstatelyhomesandmuseumstoseesomeofthefinestexamplesofclocksfromthepast.Antiqueclockscouldbeveryexpensivebutoneofthejoysofcollectingclocksisthatitisstillpossibletofindquitecheaponesforyourownhome.AfterallifyouaregoingtoberuledbythetimewhynotinvestinairantiqueclockandperhapsmakeafutureprofitThepurposeofthepassageis______.
Howshouldoneinvestasumofmoneyinthesedaysofinflation通货膨胀Leftinabankitwillhardlykeepitsvaluehoweverhightheinterestrateis.OnlyabravemanoraveryrichonedarestobuyandsellontheStockMarket.Todayitseemsthatoneofthebestwaystoprotectyoursavingsandevenincreaseyourwealthistobuybeautifulobjectsfromthepast.HereIamgoingtooffersomeadviceoncollectingantiqueclockswhichIpersonallyconsiderareamongthemostinterestingofantiques.Isometimeswonderwhatabeingfromanotherplanetmightreportbackaboutourwayoflife.TheplanetEarthisruledbyamysteriouscreaturethatsitsorstandsinaroomandmakesastrangetickingsound.Ithasafacewithtwelveblackmarksandtwohands.Mencandonothingwithoutitspermissionanditfastensitsyoungroundpeople’swristssothateverywheremengotheyarestillunderitscontrol.ThiscreatureistherealmasterofEarthandmenareitsslaves.Whetherornotweareslavesoftimetodaydependsonourcultureandpersonalitybutitisbelievedthatmanyyearsagokingskeptspecialslavestotellthetime.Certainmenwereverycleveratmeasuringthetimeofdayaccordingtothebeatingoftheirownhearts.Theyweremadetostandinafixedplaceandeveryhourorsowouldshoutthetime.Soitseemsthatthefirstclockswerehumanbeings.Howevermenquicklyfoundmoreconvenientandreliablewaysoftellingthetime.Theylearnedtousetheshadowscastbythesun.Theymarkedthehoursoncandlesusedsandinhourglassesandinventedwater-clocks.Indeedanyseriousstudentofantiquesshouldspendasmuchtimeaspossiblevisitingpalacesstatelyhomesandmuseumstoseesomeofthefinestexamplesofclocksfromthepast.Antiqueclockscouldbeveryexpensivebutoneofthejoysofcollectingclocksisthatitisstillpossibletofindquitecheaponesforyourownhome.AfterallifyouaregoingtoberuledbythetimewhynotinvestinairantiqueclockandperhapsmakeafutureprofitAccordingtothepassagecollectingantiqueclocks______.
Fromthehealthpointofviewwearelivinginamarvelousage.Weareimmunizedfrombirthagainstmanyofthemostdangerousdiseases.Alargenumberofoncefatalillnessescannowbecuredbymoderndrugsandsurgery.Itisalmostcertainthatonedayremedieswillbefoundforthemoststubbornremainingdiseases.Theexpectationoflifehasincreasedenormously.Butthoughthepossibilityoflivingalongandhappylifeisgreaterthaneverbeforeeverydaywewitnesstheincredibleslaughterofmenwomenandchildrenontheroads.Manversusthemotorcar!Itisanever-endingbattlewhichmanislosing.Thousandsofpeopleovertheworldarekilledorhorriblykilledeachyearandwearequietlysittingbackandlettingithappen.Ithasbeenrightlysaidthatwhenamanissittingbehindasteeringwheelhiscarbecomestheextensionofhispersonality.Thereisnodoubtthatthemotorcaroftenbringsoutaman’sveryworstqualities.Peoplewhoarenormallyquietandpleasantmaybecomeunrecognizablewhentheyarebehindasteering-wheel.Theysweartheyareill-manneredandaggressivewillfulastwo-year-oldsandutterlyselfish.Alltheirhiddenfrustrationsdisappointmentsandjealousiesseemtobebroughttothesurfacebytheactofdriving.Thesurprisingthingisthatsocietysmilessobenignlyonthemotoristandseemstocondonehisbehaviour.Everythingisdoneforhisconvenience.Citiesareallowedtobecomealmostuninhabitablebecauseofheavytraffic;townsaremadeuglybyhugecarparks;thecountrysideisdesecratedbyroadnetworks;andthemassannualslaughterbecomesnothingmorethanastatistictobeconvenientlyforgotten.Itishightimeaworldcodewerecreatedtoreducethissenselesswasteofhumanlife.Withregardtodrivingthelawsofsomecountriesarenotoriouslylaxandeventhestrictestarenotstrict:enough.Acodewhichwasuniversallyacceptedcouldonlyhaveadramaticallybeneficialeffectontheaccidentrate.Hereareafewexamplesofsomeofthethingsthatmightbedone.Thedrivingtestshouldbestandardizedandmadefarmoredifficultthanitis;allthedriversshouldbemadetotakeatesteverythreeyearsorso;theageatwhichyoungpeopleareallowedtodriveanyvehicleshouldheraisedtoatleast21;allvehiclesshouldbeputthroughstringentannualtestsforsafety.Eventhesmallestamountofalcoholinthebloodcanimpairaperson’sdrivingability.Presentdrinkinganddrivinglawswheretheyexistshouldhemadmuchstricter.Maximumandminimumspeedlimitsshouldbeimposedonallroads.GovernmentsshouldlaydownsafetyspecificationsformanufacturersashasbeendoneintheUSA.Alladvertisingstressingpowerandperformanceshouldbebanned.Thesemeasuresmaysoundinordinatelyharsh.Butsurelynothingshouldbeconsideredassevereifitresultsinreducingtheannualtollofhumanlife.Afteralltheworldisforhumanbeingsnotmotorcars.WhichofthefollowingisNOTmentionedasawayagainsttrafficaccidents
Fromchildhoodtooldagewealluselanguageasameansofbroadeningourknowledgeofourselvesandtheworldaboutus.Whenhumansfirst16theywerelikenewbornchildrenunabletousethis17tool.Yetoncelanguagedevelopedthepossibilitiesforhumankind’sfuture18andculturalgrowthincreased.Manylinguistsbelievethatevolutionis19forourabilitytoproduceanduselanguage.They20thatourhighlyevolvedbrainprovidesus21aninnatelanguageabilitynotfoundinlower22.Proponentsofthisinnatenesstheorysaythatour23forlanguageisinbornbutthatlanguageitselfdevelopsgradually24afunctionofthegrowthofthebrainduringchildhood.Thereforetherearecritical25timesforlanguagedevelopment.Current26oftheinnatenesstheoryaremixed;howeverevidencesupportingtheexistenceofsomeinnateabilitiesisundeniable.27moreandmoreschoolsarediscoveringthatforeignlanguagesarebesttaughtin28grades.Youngchildrenoftencanlearnseverallanguagesbybeing29tothemwhileadultshaveamuchhardertimelearninganotherlanguageoncethe30oftheirfirstlanguagehavebecomefirmlyfixed.31someaspectsoflanguageareundeniablyinnatelanguagedoesnotdevelopautomaticallyinavacuum.Childrenwhohavebeen32fromotherhumanbeingsdonotpossesslanguage.Thisdemonstratesthat33withotherhumanbeingsisnecessaryforproperlanguagedevelopment.Somelinguistsbelievethatthisisevenmorebasictohumanlanguage34thananyinnatecapacities.Thesetheoristsviewlanguageasimitativelearnedbehavior.35childrenlearnlanguagefromtheirparentsbyimitatingthem.Parentsgraduallyshapetheirchild’slanguageskillsbypositivelyreinforcingpreciseimitationsandnegativelyreinforcingimpreciseones.Ⅱ．完形填空/Cloze阅读下列短文掌握其大意然后从每小题所给的四个选项ABCD中选出最佳选项
IamSergeyBrin!IwasborninMoscow.In1979whenIwas5myfamilyimmigratedtotheU.S.A.California.Irememberthatonmy9thbirthdayIgotmyfirstcomputerCommodore64.LaterIgraduatedwithhonorsintheUniversityofMarylandinMathematicsandIT.Themainfieldofmyscienceresearchwasthetechnologiesusedtocollectdatafromunsystematicsourcesaswellaslargequantitiesoftextsandsciencedata.IwastheauthorofdozensofarticlesinleadingAmericanacademicmagazines.Thegreatesteventinmylifehappenedwhenin1998Iwaspreparingforthedefense论文答辩ofmyDoctor’sdegreeinStanfordUniversity.TherethefatemadememeetLarryPage—ayoungcomputergenius.Larrybelongedtotheintellectual知识分子society.LarryandIquicklybecamefriendswhenweworkedtogether.WeweresearchingdayandnightontheInternet.Wewerefindingalotofinformationbutwiththefeelingwestillcouldn’tfindenoughofwhatwewerelookingfor.Naturallytheideaforasearchenginethatwouldallowspecificinformationtobefoundintheendlesspoolofdatawasbornlikeitcametous.Itwasn’tourplansbutwegaveuptheeducationattheuniversity.Youknowthenextpartmaybe—wemanagedtoturnanordinarygarageinMeploParkCaliforniatheU.S.A.intoourfirstofficeinwhichGooglewasborn.WithexcitementwetypedthenameofthethingwhichwecreatedwithloveonSeptember14th1998—www.Google.com.Nowafterthoseyearsweboughtthisgarage.Asasymbolitwillalwaysremindusthateverythingispossible.SergeyBrinactuallygraduatedfrom______.
Fromchildhoodtooldagewealluselanguageasameansofbroadeningourknowledgeofourselvesandtheworldaboutus.Whenhumansfirst16theywerelikenewbornchildrenunabletousethis17tool.Yetoncelanguagedevelopedthepossibilitiesforhumankind’sfuture18andculturalgrowthincreased.Manylinguistsbelievethatevolutionis19forourabilitytoproduceanduselanguage.They20thatourhighlyevolvedbrainprovidesus21aninnatelanguageabilitynotfoundinlower22.Proponentsofthisinnatenesstheorysaythatour23forlanguageisinbornbutthatlanguageitselfdevelopsgradually24afunctionofthegrowthofthebrainduringchildhood.Thereforetherearecritical25timesforlanguagedevelopment.Current26oftheinnatenesstheoryaremixed;howeverevidencesupportingtheexistenceofsomeinnateabilitiesisundeniable.27moreandmoreschoolsarediscoveringthatforeignlanguagesarebesttaughtin28grades.Youngchildrenoftencanlearnseverallanguagesbybeing29tothemwhileadultshaveamuchhardertimelearninganotherlanguageoncethe30oftheirfirstlanguagehavebecomefirmlyfixed.31someaspectsoflanguageareundeniablyinnatelanguagedoesnotdevelopautomaticallyinavacuum.Childrenwhohavebeen32fromotherhumanbeingsdonotpossesslanguage.Thisdemonstratesthat33withotherhumanbeingsisnecessaryforproperlanguagedevelopment.Somelinguistsbelievethatthisisevenmorebasictohumanlanguage34thananyinnatecapacities.Thesetheoristsviewlanguageasimitativelearnedbehavior.35childrenlearnlanguagefromtheirparentsbyimitatingthem.Parentsgraduallyshapetheirchild’slanguageskillsbypositivelyreinforcingpreciseimitationsandnegativelyreinforcingimpreciseones.Ⅱ．完形填空/Cloze阅读下列短文掌握其大意然后从每小题所给的四个选项ABCD中选出最佳选项
Whodoyouthinkwill______nowthatthegovernorhasbeendismissed
Fromchildhoodtooldagewealluselanguageasameansofbroadeningourknowledgeofourselvesandtheworldaboutus.Whenhumansfirst16theywerelikenewbornchildrenunabletousethis17tool.Yetoncelanguagedevelopedthepossibilitiesforhumankind’sfuture18andculturalgrowthincreased.Manylinguistsbelievethatevolutionis19forourabilitytoproduceanduselanguage.They20thatourhighlyevolvedbrainprovidesus21aninnatelanguageabilitynotfoundinlower22.Proponentsofthisinnatenesstheorysaythatour23forlanguageisinbornbutthatlanguageitselfdevelopsgradually24afunctionofthegrowthofthebrainduringchildhood.Thereforetherearecritical25timesforlanguagedevelopment.Current26oftheinnatenesstheoryaremixed;howeverevidencesupportingtheexistenceofsomeinnateabilitiesisundeniable.27moreandmoreschoolsarediscoveringthatforeignlanguagesarebesttaughtin28grades.Youngchildrenoftencanlearnseverallanguagesbybeing29tothemwhileadultshaveamuchhardertimelearninganotherlanguageoncethe30oftheirfirstlanguagehavebecomefirmlyfixed.31someaspectsoflanguageareundeniablyinnatelanguagedoesnotdevelopautomaticallyinavacuum.Childrenwhohavebeen32fromotherhumanbeingsdonotpossesslanguage.Thisdemonstratesthat33withotherhumanbeingsisnecessaryforproperlanguagedevelopment.Somelinguistsbelievethatthisisevenmorebasictohumanlanguage34thananyinnatecapacities.Thesetheoristsviewlanguageasimitativelearnedbehavior.35childrenlearnlanguagefromtheirparentsbyimitatingthem.Parentsgraduallyshapetheirchild’slanguageskillsbypositivelyreinforcingpreciseimitationsandnegativelyreinforcingimpreciseones.Ⅱ．完形填空/Cloze阅读下列短文掌握其大意然后从每小题所给的四个选项ABCD中选出最佳选项
Fromchildhoodtooldagewealluselanguageasameansofbroadeningourknowledgeofourselvesandtheworldaboutus.Whenhumansfirst16theywerelikenewbornchildrenunabletousethis17tool.Yetoncelanguagedevelopedthepossibilitiesforhumankind’sfuture18andculturalgrowthincreased.Manylinguistsbelievethatevolutionis19forourabilitytoproduceanduselanguage.They20thatourhighlyevolvedbrainprovidesus21aninnatelanguageabilitynotfoundinlower22.Proponentsofthisinnatenesstheorysaythatour23forlanguageisinbornbutthatlanguageitselfdevelopsgradually24afunctionofthegrowthofthebrainduringchildhood.Thereforetherearecritical25timesforlanguagedevelopment.Current26oftheinnatenesstheoryaremixed;howeverevidencesupportingtheexistenceofsomeinnateabilitiesisundeniable.27moreandmoreschoolsarediscoveringthatforeignlanguagesarebesttaughtin28grades.Youngchildrenoftencanlearnseverallanguagesbybeing29tothemwhileadultshaveamuchhardertimelearninganotherlanguageoncethe30oftheirfirstlanguagehavebecomefirmlyfixed.31someaspectsoflanguageareundeniablyinnatelanguagedoesnotdevelopautomaticallyinavacuum.Childrenwhohavebeen32fromotherhumanbeingsdonotpossesslanguage.Thisdemonstratesthat33withotherhumanbeingsisnecessaryforproperlanguagedevelopment.Somelinguistsbelievethatthisisevenmorebasictohumanlanguage34thananyinnatecapacities.Thesetheoristsviewlanguageasimitativelearnedbehavior.35childrenlearnlanguagefromtheirparentsbyimitatingthem.Parentsgraduallyshapetheirchild’slanguageskillsbypositivelyreinforcingpreciseimitationsandnegativelyreinforcingimpreciseones.Ⅱ．完形填空/Cloze阅读下列短文掌握其大意然后从每小题所给的四个选项ABCD中选出最佳选项
Fromchildhoodtooldagewealluselanguageasameansofbroadeningourknowledgeofourselvesandtheworldaboutus.Whenhumansfirst16theywerelikenewbornchildrenunabletousethis17tool.Yetoncelanguagedevelopedthepossibilitiesforhumankind’sfuture18andculturalgrowthincreased.Manylinguistsbelievethatevolutionis19forourabilitytoproduceanduselanguage.They20thatourhighlyevolvedbrainprovidesus21aninnatelanguageabilitynotfoundinlower22.Proponentsofthisinnatenesstheorysaythatour23forlanguageisinbornbutthatlanguageitselfdevelopsgradually24afunctionofthegrowthofthebrainduringchildhood.Thereforetherearecritical25timesforlanguagedevelopment.Current26oftheinnatenesstheoryaremixed;howeverevidencesupportingtheexistenceofsomeinnateabilitiesisundeniable.27moreandmoreschoolsarediscoveringthatforeignlanguagesarebesttaughtin28grades.Youngchildrenoftencanlearnseverallanguagesbybeing29tothemwhileadultshaveamuchhardertimelearninganotherlanguageoncethe30oftheirfirstlanguagehavebecomefirmlyfixed.31someaspectsoflanguageareundeniablyinnatelanguagedoesnotdevelopautomaticallyinavacuum.Childrenwhohavebeen32fromotherhumanbeingsdonotpossesslanguage.Thisdemonstratesthat33withotherhumanbeingsisnecessaryforproperlanguagedevelopment.Somelinguistsbelievethatthisisevenmorebasictohumanlanguage34thananyinnatecapacities.Thesetheoristsviewlanguageasimitativelearnedbehavior.35childrenlearnlanguagefromtheirparentsbyimitatingthem.Parentsgraduallyshapetheirchild’slanguageskillsbypositivelyreinforcingpreciseimitationsandnegativelyreinforcingimpreciseones.Ⅱ．完形填空/Cloze阅读下列短文掌握其大意然后从每小题所给的四个选项ABCD中选出最佳选项
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