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United Nations A major segment of the Untied Nations is the Ge...
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理工类《阅读理解》真题及答案
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{{*HTML*}}{{B}}第三篇{{/B}} ???????{{B}} ?????ProblemsoftheElderly{{/B}}? ?Gerontologists老年人问题学者studyhowoldpeoplearetreatedwithinasociety andhowtheelderlydealwiththeinevitableproblemsofagingparticularly thoseinvolvinghealthandincome.Healthproblemsincludenormallossesin hearingeyesightandmemoryandtheincreasedpossibilityofchronic 慢性的diseases.Theselossesaregradualandproceedatdifferentratesforeach individual.Ingeneralthehealthofoldpeopletodayisbetterthanthatof earliergeneration--aconditionthatislikelytoimprovestillfurtherasmore peoplereceivebettermedicalcarethroughttheirlives.??Because mostoldpeoplearenolongerinthelaborforceasteadysourceofincomeis necessary.?Systemsofpensionsandbenefitsarecharacteristicof industrialsocieties.OneexampleisSocialSecurityintheU.S.whichisnow increasedautomaticallyasthecostoflivingrisesthusreducingsomewhatthe effectofinflation.??Althoughtheincomeofretiredpeopleis abouthalfthatofworkingpeoplemostmanagetoremainfinancially independent.??Incomeneedsandhealtharewhatpeopleconsider mostwhentheydecidewhethertoretireornot.Puttinganendtothelimiton theretirementageisnotexpectedtocausemanyworkerstostayonthejobif theycanaffordtoretire.TheneedtorelievestrainsontheSocialSecurity systemhoweverhasledtolegislationthatgraduallyraisestheageatwhich peoplecangetfullbenefits.Thismightforcethemtoworklongerinthe future.??Elderlypeoplethemselvesoftendisplayhighspirits satisfactionwithlifeandfeelingsofself-worth.Theimportantfactorsare healthandincome.Thetaskofmodernsocietiesistoensurethattheagedhave theirbasicneedsmetandthattheycancontinuetofunctioninthe community.AccordingtothelastparagraphwhichofthefollowingisNOTtrueofelderlypeople?
TheAttitudeForComputers AsDr.SamuelJohnsonsaidinadifferenteraaboutladiespreachingthesurprisingthingaboutcomputersisnotthattheythinklesswellthanamanbutthattheythinkatall.Theearlyelectroniccomputerdidnothavemuchgoingforitexceptamarvelousmemoryandsomegoodmathskills.Buttodaythebestmodelscanbewireduptolearnbyexperiencefollowanargumentaskproperquestionsandwritepoetryandmusic.Theycanalsocarryonsomewhatpuzzlingconversations. Computersimitatelife.Ascomputersgetmorecompletetheimitationgetsbetter.Finallythelinebetweentheoriginalandthecopybecomesunclear.Inanother15yearsorsowewillseethecomputerasanewformoflife. Theopinionseemsridiculousbecauseforonethingcomputerslackthedrivesandemotionsoflivingcreatures.Butdrivescanbeprogrammedintothecomputer’’sbrainjustasnatureprogrammedthemintoourhumanbrainsasapartoftheequipmentforsurvival. Computersmatchpeopleinsomerolesandwhenfastdecisionsareneededinacrisistheyoftensurpassthem.Havingevolvedwhenthepaceoflifewasslowerthehumanbrainhasaninherentdefectthatpreventsitfromabsorbingseveralstreamsofinformationsimultaneouslyandactingonthemquickly.Throwtoomanythingsatthebrainatonetimeanditfreezesup. Wearestillincontrolbutthecapabilitiesofcomputersareincreasingatafantasticratewhilerawhumanintelligenceischangingslowlyifatall.Computerpowerhasincreasedtentimeseveryeightyearssince1946.Inthe1990swhenthesixthgenerationappearsthereasoningpowerofanintelligencebuiltoutofsiliconwillbegintomatchthatofthehumanbrain. Thatdoesnotmeantheevolutionofintelligencehasendedontheearth.Judgingbythepastwecanexpectthatanewspecieswillariseoutofmansurpassinghisachievementsashehassurpassedthoseofhispredecessor.Onlyacarbonchemistryenthusiastwouldassumethatthespeciesmustbeman’’sflesh-and-blooddescendants.Thenewkindofintelligentlifeismorelikelytobemadeofsilicon. Somedayitwillbedifficulttotellacomputerfromaman.
Knitting Mymotherknewhowtoknit编织butshenevertaughtme.Sheassumedasdidmanywomenofhergenerationthatknittingwasnolongeraskillworthpassingdownfrommothertodaughter.Acombinationoffeminism女权主义andconsumerism浪费主义mademanywomenfeelthatsuchhomelyaccomplishmentswerenowoutofdate.MyGrandmotherstillknittedthoughandeveryChristmasshemadeapairofsocksformybrotherandmeofredwool.Theyweretheonesweworeunderouriceskates冰鞋whenitwasreallyimportanttohavewarmfeet. Knittingisanervoushabitthathappenstobeproductive.Ithelpedmequitsmokingbygivingmyhandssomethingelsetodo.Itiswonderfulfordepressionbecausenomatterwhatelsehappensyouarecreatingsomethingbeautiful.Timespentinfrontofthetelevisionorjustsittingisnolongertimewasted. Ilovebreathinglifeintothepatterns.It’’struemagicfindinganeglecteddog-earedoldbookwiththeperfectsnowflakedesignbuyingthesameGermantownwoolmygrandmotherusedintheexactbluetomatchmydaughter’’seyestakingitonthetrainwithmeeverydayfortwomonthsworkingenthusiasticallytogetitdonebyChristmasstayinguplateafterthestockingsarefilledtosewinthesleevesandweaveintheends. Knittinghastaughtmepatience.IknowthatifIjustkeepgoingevenifittakesmonthstherewillbeareward.WhenImakeamistakeIknowthatangerwillnotfixitthatIjusthavetogobackandtakeoutthestitches针脚betweenandstartoveragain. PeopleoftenaskifIwoulddoitformoneyandtheanswerisalwaysadefiniteno.InthefirstplaceyoucouldnotpaymeenoughforthehoursIputintoasweater.ButmoreimportantthisisanactivityIkeepseparatefromsuchconsiderations.IknittocovermychildrenandotherpeopleIloveinwarmthandcolor.Iknittogivethemsomethingearthlythatmoneycouldneverbuy. Knittinggivesmylifeanalternativerhythmtothedailydeadline.BydayIcanwriteaboutNorthernIrelandortheNewYorkCityPoliceDepartmentandgetpaidforitbutonthetrainhomesurroundedbypeoplewithlaptopsIstagemylittlerebellion.Itakeoutmyoldknittingbagandjointhecenturiesofwomenwhohaveknittedforlove. Theauthorworetheredsockshergrandmotherhadknittedforher______.
Thetownisfamousforitsmagnificentchurchtowers.
TheAttitudeForComputers AsDr.SamuelJohnsonsaidinadifferenteraaboutladiespreachingthesurprisingthingaboutcomputersisnotthattheythinklesswellthanamanbutthattheythinkatall.Theearlyelectroniccomputerdidnothavemuchgoingforitexceptamarvelousmemoryandsomegoodmathskills.Buttodaythebestmodelscanbewireduptolearnbyexperiencefollowanargumentaskproperquestionsandwritepoetryandmusic.Theycanalsocarryonsomewhatpuzzlingconversations. Computersimitatelife.Ascomputersgetmorecompletetheimitationgetsbetter.Finallythelinebetweentheoriginalandthecopybecomesunclear.Inanother15yearsorsowewillseethecomputerasanewformoflife. Theopinionseemsridiculousbecauseforonethingcomputerslackthedrivesandemotionsoflivingcreatures.Butdrivescanbeprogrammedintothecomputer’’sbrainjustasnatureprogrammedthemintoourhumanbrainsasapartoftheequipmentforsurvival. Computersmatchpeopleinsomerolesandwhenfastdecisionsareneededinacrisistheyoftensurpassthem.Havingevolvedwhenthepaceoflifewasslowerthehumanbrainhasaninherentdefectthatpreventsitfromabsorbingseveralstreamsofinformationsimultaneouslyandactingonthemquickly.Throwtoomanythingsatthebrainatonetimeanditfreezesup. Wearestillincontrolbutthecapabilitiesofcomputersareincreasingatafantasticratewhilerawhumanintelligenceischangingslowlyifatall.Computerpowerhasincreasedtentimeseveryeightyearssince1946.Inthe1990swhenthesixthgenerationappearsthereasoningpowerofanintelligencebuiltoutofsiliconwillbegintomatchthatofthehumanbrain. Thatdoesnotmeantheevolutionofintelligencehasendedontheearth.Judgingbythepastwecanexpectthatanewspecieswillariseoutofmansurpassinghisachievementsashehassurpassedthoseofhispredecessor.Onlyacarbonchemistryenthusiastwouldassumethatthespeciesmustbeman’’sflesh-and-blooddescendants.Thenewkindofintelligentlifeismorelikelytobemadeofsilicon. Intermsofmakingdecisionsthehumanbraincannotbecomparedwiththecomputerbecauseinthelongproceduresofevolutiontheslowpaceoflifedidn’trequiresuchanabilityofthehumanbrain.
NaturalHealthCare Naturalhealthcareisaphilosophyandasetofprinciplesandpracticesbasedonsciencethatleadtoanextraordinarylevelofpersonalhealthandhappiness. Itrecognizestheunityofalllifeandholdsthatphysicalmentalandemotionalhealthcannotbeseparatedandthatpersonalhealthenvironmentalhealthandcommunityhealtharepartsofawhole.Naturalhygiene卫生学teachesthatthebestwaytoachievebesthealthisrightliving—developingself-esteemandapositiveattitudetowardslife;eatingfreshwholenaturalfoods;exercisingregularly;gettingplentyofrestandsleep;gettingplentyoffreshairandsunshine;learningtohandlestress;andavoidingallnegativeinfluencesoflife. Basicprinciples:Naturalhealthcareisuniqueinitsargumentthathealthisnormal—assimpleaslivinginharmonywithnature.Healthanddiseaseareacontinuum连续统一体—thesamephysiological生理的lawsgovernthebodyinsicknessandinhealth.Healing康复isabiologicalprocess—exceptinextraordinarycircumstanceshealingistheresultofactionsundertakenbythebodyonitsownbehalf. Thetraditionofnaturalhealthcare:ThetraditionalprinciplesofnaturalhygieneareexplainedbyHerbertM.SheltoninhisNaturalHygiene:ThePlainWayofLife.Sheltonwrites:Itshouldnotrequireargumenttoconvinceintelligentmenandwomenthatmancanreturntohealthandstrengthonlyuponabasisoflawnaturallawspecificallyuponabasisofthoselawsthatoperatetomakehumanlifepossible.Alllawsessentialtothewelfareofmanarewritteninhisownconstitution.Everyruleofhumanconducttobevaluedinpromotinghumanwelfareandhappinessmustbeinharmonywithhisnature.Nolawnosocialcustomnomoralprinciplecanhaveanyvalidity有效性formanthatdoesnotagreewithhishighestwelfare.Ifitisnotcloselyrelatedtoman’’shighestphysicalmoralandintellectualfitnessitcannotbeconsistentwithhishighestidealsoftruthdutyandenjoyment. WhichofthefollowingisNOTmentionedasanexampleofrightliving?
{{*HTML*}}??阅读下面的短文文中有15处空白每处空白给出了4个选项请根据短文的内容从4个选项中选择1个最佳答案 ??????{{B}}? ??????????? ?HowtheBodyKeepstheSameTemperature{{/B}}??The temperatureofyourbodyshouldbealwaysjustthesamenomatterwhetherthe weatherishotorcold.Thatiswhythedoctoruseshisthermometerwhenyouare sick.Whenyouarewellyourtemperatureisninety-eightandsixtenths degrees.Ifhefindsit{{U}}?51?{{/U}}thanthatitisasuresign thatsomethingiswrong.??Thebodykeepsthesametemperatureall thetimebecauseitbalances平衡theheatitproduces?and{{U}}?52 ?{{/U}}off.Itisalwaysburningupfoodandproducingheat.Itcanproduce heatfasterwhenitneedstoorgiveoffheatfasterwhenitbecomestoowarm. Let’ssee{{U}}?53?{{/U}}thishappens.??Theheatofyour bodyisgivenoffchieflythroughtheskin.Whenyouare{{U}}?54 ?{{/U}}yourskinistightandshowsgooseflesh.Whenyougetchilly 寒冷的youmustdancearoundtokeepwarmor{{U}}?55?{{/U}}youwill shiver颤抖.{{U}}?56?{{/U}}yourmusclesbegintoworkburnupfuel andproducemoreheat.Itisnot{{U}}?57?{{/U}}toshiversoyou usuallypreferwarmingupbyexerciseorput{{U}}?58?{{/U}}more clothestokeepheatin.??Whenyouarewarmtheskinisloose andsoft.Itissosupplied{{U}}?59?{{/U}}bloodthatheatisgivenoff rapidly.Ifyougettoohotyoubegintosweatand{{U}}?60 ?{{/U}}bodyheatisusedinevaporating?蒸发themoisture潮湿from yourskin.Youwearlessclothingtooinwarm{{U}}?61?{{/U}}orina warmroomsothatwarmthcanbegivenofffreely.Youfeelyoudon’t{{U}} ?62?{{/U}}exercisingbecauseyourbodyiswarm{{U}}?63 ?{{/U}}andtheextraheatproducedbyexercisemakesyou uncomfortable.??Youcanseefromthiswhyyou{{U}}?64 ?{{/U}}differentlyindifferentkindsofweather.Insummerwhenitiswarm youfeeltiredandlazy.Youdonotcaretoworkorplaybutenjoylyingand doingnothing.Whenyougetoutofdoorsinwinterthecoldairmakesyou feel{{U}}?65?{{/U}}Youwanttorunand play.
{{*HTML*}}??阅读下面的短文文中有15处空白每处空白给出了4个选项请根据短文的内容从4个选项中选择1个最佳答案 ??????{{B}}? ??????????? ?HowtheBodyKeepstheSameTemperature{{/B}}??The temperatureofyourbodyshouldbealwaysjustthesamenomatterwhetherthe weatherishotorcold.Thatiswhythedoctoruseshisthermometerwhenyouare sick.Whenyouarewellyourtemperatureisninety-eightandsixtenths degrees.Ifhefindsit{{U}}?51?{{/U}}thanthatitisasuresign thatsomethingiswrong.??Thebodykeepsthesametemperatureall thetimebecauseitbalances平衡theheatitproduces?and{{U}}?52 ?{{/U}}off.Itisalwaysburningupfoodandproducingheat.Itcanproduce heatfasterwhenitneedstoorgiveoffheatfasterwhenitbecomestoowarm. Let’ssee{{U}}?53?{{/U}}thishappens.??Theheatofyour bodyisgivenoffchieflythroughtheskin.Whenyouare{{U}}?54 ?{{/U}}yourskinistightandshowsgooseflesh.Whenyougetchilly 寒冷的youmustdancearoundtokeepwarmor{{U}}?55?{{/U}}youwill shiver颤抖.{{U}}?56?{{/U}}yourmusclesbegintoworkburnupfuel andproducemoreheat.Itisnot{{U}}?57?{{/U}}toshiversoyou usuallypreferwarmingupbyexerciseorput{{U}}?58?{{/U}}more clothestokeepheatin.??Whenyouarewarmtheskinisloose andsoft.Itissosupplied{{U}}?59?{{/U}}bloodthatheatisgivenoff rapidly.Ifyougettoohotyoubegintosweatand{{U}}?60 ?{{/U}}bodyheatisusedinevaporating?蒸发themoisture潮湿from yourskin.Youwearlessclothingtooinwarm{{U}}?61?{{/U}}orina warmroomsothatwarmthcanbegivenofffreely.Youfeelyoudon’t{{U}} ?62?{{/U}}exercisingbecauseyourbodyiswarm{{U}}?63 ?{{/U}}andtheextraheatproducedbyexercisemakesyou uncomfortable.??Youcanseefromthiswhyyou{{U}}?64 ?{{/U}}differentlyindifferentkindsofweather.Insummerwhenitiswarm youfeeltiredandlazy.Youdonotcaretoworkorplaybutenjoylyingand doingnothing.Whenyougetoutofdoorsinwinterthecoldairmakesyou feel{{U}}?65?{{/U}}Youwanttorunand play.
{{*HTML*}}??阅读下面的短文文中有15处空白每处空白给出了4个选项请根据短文的内容从4个选项中选择1个最佳答案 ??????{{B}}? ??????????? ?HowtheBodyKeepstheSameTemperature{{/B}}??The temperatureofyourbodyshouldbealwaysjustthesamenomatterwhetherthe weatherishotorcold.Thatiswhythedoctoruseshisthermometerwhenyouare sick.Whenyouarewellyourtemperatureisninety-eightandsixtenths degrees.Ifhefindsit{{U}}?51?{{/U}}thanthatitisasuresign thatsomethingiswrong.??Thebodykeepsthesametemperatureall thetimebecauseitbalances平衡theheatitproduces?and{{U}}?52 ?{{/U}}off.Itisalwaysburningupfoodandproducingheat.Itcanproduce heatfasterwhenitneedstoorgiveoffheatfasterwhenitbecomestoowarm. Let’ssee{{U}}?53?{{/U}}thishappens.??Theheatofyour bodyisgivenoffchieflythroughtheskin.Whenyouare{{U}}?54 ?{{/U}}yourskinistightandshowsgooseflesh.Whenyougetchilly 寒冷的youmustdancearoundtokeepwarmor{{U}}?55?{{/U}}youwill shiver颤抖.{{U}}?56?{{/U}}yourmusclesbegintoworkburnupfuel andproducemoreheat.Itisnot{{U}}?57?{{/U}}toshiversoyou usuallypreferwarmingupbyexerciseorput{{U}}?58?{{/U}}more clothestokeepheatin.??Whenyouarewarmtheskinisloose andsoft.Itissosupplied{{U}}?59?{{/U}}bloodthatheatisgivenoff rapidly.Ifyougettoohotyoubegintosweatand{{U}}?60 ?{{/U}}bodyheatisusedinevaporating?蒸发themoisture潮湿from yourskin.Youwearlessclothingtooinwarm{{U}}?61?{{/U}}orina warmroomsothatwarmthcanbegivenofffreely.Youfeelyoudon’t{{U}} ?62?{{/U}}exercisingbecauseyourbodyiswarm{{U}}?63 ?{{/U}}andtheextraheatproducedbyexercisemakesyou uncomfortable.??Youcanseefromthiswhyyou{{U}}?64 ?{{/U}}differentlyindifferentkindsofweather.Insummerwhenitiswarm youfeeltiredandlazy.Youdonotcaretoworkorplaybutenjoylyingand doingnothing.Whenyougetoutofdoorsinwinterthecoldairmakesyou feel{{U}}?65?{{/U}}Youwanttorunand play.
{{*HTML*}}??阅读下面的短文文中有15处空白每处空白给出了4个选项请根据短文的内容从4个选项中选择1个最佳答案 ??????{{B}}? ??????????? ?HowtheBodyKeepstheSameTemperature{{/B}}??The temperatureofyourbodyshouldbealwaysjustthesamenomatterwhetherthe weatherishotorcold.Thatiswhythedoctoruseshisthermometerwhenyouare sick.Whenyouarewellyourtemperatureisninety-eightandsixtenths degrees.Ifhefindsit{{U}}?51?{{/U}}thanthatitisasuresign thatsomethingiswrong.??Thebodykeepsthesametemperatureall thetimebecauseitbalances平衡theheatitproduces?and{{U}}?52 ?{{/U}}off.Itisalwaysburningupfoodandproducingheat.Itcanproduce heatfasterwhenitneedstoorgiveoffheatfasterwhenitbecomestoowarm. Let’ssee{{U}}?53?{{/U}}thishappens.??Theheatofyour bodyisgivenoffchieflythroughtheskin.Whenyouare{{U}}?54 ?{{/U}}yourskinistightandshowsgooseflesh.Whenyougetchilly 寒冷的youmustdancearoundtokeepwarmor{{U}}?55?{{/U}}youwill shiver颤抖.{{U}}?56?{{/U}}yourmusclesbegintoworkburnupfuel andproducemoreheat.Itisnot{{U}}?57?{{/U}}toshiversoyou usuallypreferwarmingupbyexerciseorput{{U}}?58?{{/U}}more clothestokeepheatin.??Whenyouarewarmtheskinisloose andsoft.Itissosupplied{{U}}?59?{{/U}}bloodthatheatisgivenoff rapidly.Ifyougettoohotyoubegintosweatand{{U}}?60 ?{{/U}}bodyheatisusedinevaporating?蒸发themoisture潮湿from yourskin.Youwearlessclothingtooinwarm{{U}}?61?{{/U}}orina warmroomsothatwarmthcanbegivenofffreely.Youfeelyoudon’t{{U}} ?62?{{/U}}exercisingbecauseyourbodyiswarm{{U}}?63 ?{{/U}}andtheextraheatproducedbyexercisemakesyou uncomfortable.??Youcanseefromthiswhyyou{{U}}?64 ?{{/U}}differentlyindifferentkindsofweather.Insummerwhenitiswarm youfeeltiredandlazy.Youdonotcaretoworkorplaybutenjoylyingand doingnothing.Whenyougetoutofdoorsinwinterthecoldairmakesyou feel{{U}}?65?{{/U}}Youwanttorunand play.
{{*HTML*}}??阅读下面的短文文中有15处空白每处空白给出了4个选项请根据短文的内容从4个选项中选择1个最佳答案 ??????{{B}}? ??????????? ?HowtheBodyKeepstheSameTemperature{{/B}}??The temperatureofyourbodyshouldbealwaysjustthesamenomatterwhetherthe weatherishotorcold.Thatiswhythedoctoruseshisthermometerwhenyouare sick.Whenyouarewellyourtemperatureisninety-eightandsixtenths degrees.Ifhefindsit{{U}}?51?{{/U}}thanthatitisasuresign thatsomethingiswrong.??Thebodykeepsthesametemperatureall thetimebecauseitbalances平衡theheatitproduces?and{{U}}?52 ?{{/U}}off.Itisalwaysburningupfoodandproducingheat.Itcanproduce heatfasterwhenitneedstoorgiveoffheatfasterwhenitbecomestoowarm. Let’ssee{{U}}?53?{{/U}}thishappens.??Theheatofyour bodyisgivenoffchieflythroughtheskin.Whenyouare{{U}}?54 ?{{/U}}yourskinistightandshowsgooseflesh.Whenyougetchilly 寒冷的youmustdancearoundtokeepwarmor{{U}}?55?{{/U}}youwill shiver颤抖.{{U}}?56?{{/U}}yourmusclesbegintoworkburnupfuel andproducemoreheat.Itisnot{{U}}?57?{{/U}}toshiversoyou usuallypreferwarmingupbyexerciseorput{{U}}?58?{{/U}}more clothestokeepheatin.??Whenyouarewarmtheskinisloose andsoft.Itissosupplied{{U}}?59?{{/U}}bloodthatheatisgivenoff rapidly.Ifyougettoohotyoubegintosweatand{{U}}?60 ?{{/U}}bodyheatisusedinevaporating?蒸发themoisture潮湿from yourskin.Youwearlessclothingtooinwarm{{U}}?61?{{/U}}orina warmroomsothatwarmthcanbegivenofffreely.Youfeelyoudon’t{{U}} ?62?{{/U}}exercisingbecauseyourbodyiswarm{{U}}?63 ?{{/U}}andtheextraheatproducedbyexercisemakesyou uncomfortable.??Youcanseefromthiswhyyou{{U}}?64 ?{{/U}}differentlyindifferentkindsofweather.Insummerwhenitiswarm youfeeltiredandlazy.Youdonotcaretoworkorplaybutenjoylyingand doingnothing.Whenyougetoutofdoorsinwinterthecoldairmakesyou feel{{U}}?65?{{/U}}Youwanttorunand play.
TheNewYeariscoming.Wedecidedtogiveourroomathoroughclean.
Howmanyradioswillyourfactoryturnoutthisyear?
{{*HTML*}}? ?阅读下面的短文文章中有5处空白文章后面有6组文字请根据文章的内容选择5组文字将其分别放回文章原有位置以恢复文章原貌 ?????????? ????{{B}}EconomicGrowth{{/B}}??Theeconomy ofanationrequires{{U}}?46?{{/U}}.Totaloutputmustgrowifthe countryistoabsorbabout1.5millionnewworkerswhoenterthelaborforce eachyearandmoreworkerswhoarereplacedeachyearasaformoftechnological change.Ifthenationproducedthesamelevelofoutputeachyearinsteadof increasingitpeoplewouldhavefewerjobsgrowingunemploymentandadecline intheper-capita人均的incomeofthenation.Tomaintainorincreasetheexisting standardoflivingandtopreventunemploymentfromrising{{U}}?47 ?{{/U}}.Higherratesofemploymentandsubstantialper-capitaoutputgains seemtooccurwhentherealeconomicgrowthrateisover3%asitwasinthe years1983through1988.Recentexperienceshowsthatwitharealgrowthrate oflessthan2.5%theU.S.economysuffersfrom{{U}}?48 ?{{/U}}??Forexampleunemploymentattheendof1990was5.4% ofthelaborforce.Butbytheendof1991unemploymentwasmorethan6.6%of thelaborforce.Whydidthishappen?Simplybecausetherealoutputofgoods andservicesdeclinedin1991.Newmembersintothelaborforcecouldnotbe absorbedso{{U}}?49?{{/U}}.Furthermorealargenumberofworkers withdrewfromthelaborforcealtogetherbecause{{U}}?50?{{/U}}. Insteadofrisingin1991therealGDPactuallyfell0.7%.RealGDProseagain in1992by2.6%butunemploymentalsoroseto7.3%ofthelaborforce.GDP con～tinuedtoriseduring?1993gaineda3%.Atthesametimeunemployment stoodat6.8%ofthelaborforce.Per-capitaincomealsogrewagainduring 1993.A?unemploymentroseB?theywereunabletofindworkC ?ahealthyrateofeconomicgrowthD?outofworkE?they mustincreaserealgrossdomesticproductGDPcontinuouslyF?higher unemploymentandlimitedgainsinper-capitaoutputandincome
TheAttitudeForComputers AsDr.SamuelJohnsonsaidinadifferenteraaboutladiespreachingthesurprisingthingaboutcomputersisnotthattheythinklesswellthanamanbutthattheythinkatall.Theearlyelectroniccomputerdidnothavemuchgoingforitexceptamarvelousmemoryandsomegoodmathskills.Buttodaythebestmodelscanbewireduptolearnbyexperiencefollowanargumentaskproperquestionsandwritepoetryandmusic.Theycanalsocarryonsomewhatpuzzlingconversations. Computersimitatelife.Ascomputersgetmorecompletetheimitationgetsbetter.Finallythelinebetweentheoriginalandthecopybecomesunclear.Inanother15yearsorsowewillseethecomputerasanewformoflife. Theopinionseemsridiculousbecauseforonethingcomputerslackthedrivesandemotionsoflivingcreatures.Butdrivescanbeprogrammedintothecomputer’’sbrainjustasnatureprogrammedthemintoourhumanbrainsasapartoftheequipmentforsurvival. Computersmatchpeopleinsomerolesandwhenfastdecisionsareneededinacrisistheyoftensurpassthem.Havingevolvedwhenthepaceoflifewasslowerthehumanbrainhasaninherentdefectthatpreventsitfromabsorbingseveralstreamsofinformationsimultaneouslyandactingonthemquickly.Throwtoomanythingsatthebrainatonetimeanditfreezesup. Wearestillincontrolbutthecapabilitiesofcomputersareincreasingatafantasticratewhilerawhumanintelligenceischangingslowlyifatall.Computerpowerhasincreasedtentimeseveryeightyearssince1946.Inthe1990swhenthesixthgenerationappearsthereasoningpowerofanintelligencebuiltoutofsiliconwillbegintomatchthatofthehumanbrain. Thatdoesnotmeantheevolutionofintelligencehasendedontheearth.Judgingbythepastwecanexpectthatanewspecieswillariseoutofmansurpassinghisachievementsashehassurpassedthoseofhispredecessor.Onlyacarbonchemistryenthusiastwouldassumethatthespeciesmustbeman’’sflesh-and-blooddescendants.Thenewkindofintelligentlifeismorelikelytobemadeofsilicon. Dr.SamuelJohsondisapprovedofladiestopreach.
{{*HTML*}}??阅读下面的短文文中有15处空白每处空白给出了4个选项请根据短文的内容从4个选项中选择1个最佳答案 ??????{{B}}? ??????????? ?HowtheBodyKeepstheSameTemperature{{/B}}??The temperatureofyourbodyshouldbealwaysjustthesamenomatterwhetherthe weatherishotorcold.Thatiswhythedoctoruseshisthermometerwhenyouare sick.Whenyouarewellyourtemperatureisninety-eightandsixtenths degrees.Ifhefindsit{{U}}?51?{{/U}}thanthatitisasuresign thatsomethingiswrong.??Thebodykeepsthesametemperatureall thetimebecauseitbalances平衡theheatitproduces?and{{U}}?52 ?{{/U}}off.Itisalwaysburningupfoodandproducingheat.Itcanproduce heatfasterwhenitneedstoorgiveoffheatfasterwhenitbecomestoowarm. Let’ssee{{U}}?53?{{/U}}thishappens.??Theheatofyour bodyisgivenoffchieflythroughtheskin.Whenyouare{{U}}?54 ?{{/U}}yourskinistightandshowsgooseflesh.Whenyougetchilly 寒冷的youmustdancearoundtokeepwarmor{{U}}?55?{{/U}}youwill shiver颤抖.{{U}}?56?{{/U}}yourmusclesbegintoworkburnupfuel andproducemoreheat.Itisnot{{U}}?57?{{/U}}toshiversoyou usuallypreferwarmingupbyexerciseorput{{U}}?58?{{/U}}more clothestokeepheatin.??Whenyouarewarmtheskinisloose andsoft.Itissosupplied{{U}}?59?{{/U}}bloodthatheatisgivenoff rapidly.Ifyougettoohotyoubegintosweatand{{U}}?60 ?{{/U}}bodyheatisusedinevaporating?蒸发themoisture潮湿from yourskin.Youwearlessclothingtooinwarm{{U}}?61?{{/U}}orina warmroomsothatwarmthcanbegivenofffreely.Youfeelyoudon’t{{U}} ?62?{{/U}}exercisingbecauseyourbodyiswarm{{U}}?63 ?{{/U}}andtheextraheatproducedbyexercisemakesyou uncomfortable.??Youcanseefromthiswhyyou{{U}}?64 ?{{/U}}differentlyindifferentkindsofweather.Insummerwhenitiswarm youfeeltiredandlazy.Youdonotcaretoworkorplaybutenjoylyingand doingnothing.Whenyougetoutofdoorsinwinterthecoldairmakesyou feel{{U}}?65?{{/U}}Youwanttorunand play.
TheGrandCanyon StandingontherimoftheGrandCanyon大峡谷gazingacrossthisgiantwoundintheEarth’’ssurfaceavisitormightassumethatthecanyonhadbeencausedbysomeancientconvulsion震动.Infacttheeventsthatproducedthecanyonfarfrombeingsuddenandcatastrophicsimplyadduptotheslowandorderlyprocessoferosion. ManymillionsofyearsagotheColoradoPlateauintheGrandCanyonareacontained1000morefeetofrockthanitdoestodayandwasrelativelylevel.Theadditionalmaterialconsistedofsome14layeredformationsofrock.IntheGrandCanyonregiontheselayerswerelargelywornawayoverthecourseofmillionsofyears. Approximately65millionyearsagotheplateausflatsurfaceintheGrandCanyonareabulgedupwardfrominternalpressuregeologistsrefertothisbulgingactionsupwarding弯曲上升;itwasfollowedbyageneralelevationofthewholeColoradoPlateauaprocessthatisstillgoingon.Astheplateaugraduallyroseshallowriversthatwindedacrossitbegantorunmoreswiftlyandcutmoredefinitecourses.OneoftheseriverslocatedeastoftheupwardwastheancestoroftheColorado.AnotherriversystemcalledtheHualapaiflowingwestoftheupwardextendeditselfeastwardbycuttingbackintotheupwarditeventuallyconnectedwiththeancientColoradoandcaptureditswaters.Thenewriverthenbegantocarveoutthe277-mile-longtrenchthateventuallybecametheGrandCanyon.Geologistsestimatethatthisinitialcuttingactionbegannoearlierthan10millionyearsago. SincethentheCanyonforminghasbeencumulative.Tothecorrosiveforceoftheriveritselfhavebeenaddedotherfactors.Heatandcoldrainandsnowalongwiththevaryingresistanceoftherocksincreasetheopportunitiesforerosions.TheCanyonwallscrumbletheriveracquiresacuttingtool.Tonsofdebrisrainfallrunningoffthehighplateaucreatesfeederstreamsthatcarresidecanyons.Pushingslowlybackwardintotheplateauthesidecanyonsexposenewrocksandthepatternoferosioncontinues. AccordingtothepassagehowmanymileslongwasthetrenchthatbecameknownastheGrandCanyon?
NaturalHealthCare Naturalhealthcareisaphilosophyandasetofprinciplesandpracticesbasedonsciencethatleadtoanextraordinarylevelofpersonalhealthandhappiness. Itrecognizestheunityofalllifeandholdsthatphysicalmentalandemotionalhealthcannotbeseparatedandthatpersonalhealthenvironmentalhealthandcommunityhealtharepartsofawhole.Naturalhygiene卫生学teachesthatthebestwaytoachievebesthealthisrightliving—developingself-esteemandapositiveattitudetowardslife;eatingfreshwholenaturalfoods;exercisingregularly;gettingplentyofrestandsleep;gettingplentyoffreshairandsunshine;learningtohandlestress;andavoidingallnegativeinfluencesoflife. Basicprinciples:Naturalhealthcareisuniqueinitsargumentthathealthisnormal—assimpleaslivinginharmonywithnature.Healthanddiseaseareacontinuum连续统一体—thesamephysiological生理的lawsgovernthebodyinsicknessandinhealth.Healing康复isabiologicalprocess—exceptinextraordinarycircumstanceshealingistheresultofactionsundertakenbythebodyonitsownbehalf. Thetraditionofnaturalhealthcare:ThetraditionalprinciplesofnaturalhygieneareexplainedbyHerbertM.SheltoninhisNaturalHygiene:ThePlainWayofLife.Sheltonwrites:Itshouldnotrequireargumenttoconvinceintelligentmenandwomenthatmancanreturntohealthandstrengthonlyuponabasisoflawnaturallawspecificallyuponabasisofthoselawsthatoperatetomakehumanlifepossible.Alllawsessentialtothewelfareofmanarewritteninhisownconstitution.Everyruleofhumanconducttobevaluedinpromotinghumanwelfareandhappinessmustbeinharmonywithhisnature.Nolawnosocialcustomnomoralprinciplecanhaveanyvalidity有效性formanthatdoesnotagreewithhishighestwelfare.Ifitisnotcloselyrelatedtoman’’shighestphysicalmoralandintellectualfitnessitcannotbeconsistentwithhishighestidealsoftruthdutyandenjoyment. InShelton’seyestryingtoconvinceintelligentpeoplethatmancanreturntohealthonlyonabasisofnaturallaw______.
TheAttitudeForComputers AsDr.SamuelJohnsonsaidinadifferenteraaboutladiespreachingthesurprisingthingaboutcomputersisnotthattheythinklesswellthanamanbutthattheythinkatall.Theearlyelectroniccomputerdidnothavemuchgoingforitexceptamarvelousmemoryandsomegoodmathskills.Buttodaythebestmodelscanbewireduptolearnbyexperiencefollowanargumentaskproperquestionsandwritepoetryandmusic.Theycanalsocarryonsomewhatpuzzlingconversations. Computersimitatelife.Ascomputersgetmorecompletetheimitationgetsbetter.Finallythelinebetweentheoriginalandthecopybecomesunclear.Inanother15yearsorsowewillseethecomputerasanewformoflife. Theopinionseemsridiculousbecauseforonethingcomputerslackthedrivesandemotionsoflivingcreatures.Butdrivescanbeprogrammedintothecomputer’’sbrainjustasnatureprogrammedthemintoourhumanbrainsasapartoftheequipmentforsurvival. Computersmatchpeopleinsomerolesandwhenfastdecisionsareneededinacrisistheyoftensurpassthem.Havingevolvedwhenthepaceoflifewasslowerthehumanbrainhasaninherentdefectthatpreventsitfromabsorbingseveralstreamsofinformationsimultaneouslyandactingonthemquickly.Throwtoomanythingsatthebrainatonetimeanditfreezesup. Wearestillincontrolbutthecapabilitiesofcomputersareincreasingatafantasticratewhilerawhumanintelligenceischangingslowlyifatall.Computerpowerhasincreasedtentimeseveryeightyearssince1946.Inthe1990swhenthesixthgenerationappearsthereasoningpowerofanintelligencebuiltoutofsiliconwillbegintomatchthatofthehumanbrain. Thatdoesnotmeantheevolutionofintelligencehasendedontheearth.Judgingbythepastwecanexpectthatanewspecieswillariseoutofmansurpassinghisachievementsashehassurpassedthoseofhispredecessor.Onlyacarbonchemistryenthusiastwouldassumethatthespeciesmustbeman’’sflesh-and-blooddescendants.Thenewkindofintelligentlifeismorelikelytobemadeofsilicon. Futuremanwillbemadeofsiliconinsteadoffleshandblood.
Whensnowcollectsontopofabuildingduringthewintertheweightsometimesweakenstheconstructionandoccasionallycausestherooftocollapse.
{{*HTML*}}??阅读下面的短文文中有15处空白每处空白给出了4个选项请根据短文的内容从4个选项中选择1个最佳答案 ??????{{B}}? ??????????? ?HowtheBodyKeepstheSameTemperature{{/B}}??The temperatureofyourbodyshouldbealwaysjustthesamenomatterwhetherthe weatherishotorcold.Thatiswhythedoctoruseshisthermometerwhenyouare sick.Whenyouarewellyourtemperatureisninety-eightandsixtenths degrees.Ifhefindsit{{U}}?51?{{/U}}thanthatitisasuresign thatsomethingiswrong.??Thebodykeepsthesametemperatureall thetimebecauseitbalances平衡theheatitproduces?and{{U}}?52 ?{{/U}}off.Itisalwaysburningupfoodandproducingheat.Itcanproduce heatfasterwhenitneedstoorgiveoffheatfasterwhenitbecomestoowarm. Let’ssee{{U}}?53?{{/U}}thishappens.??Theheatofyour bodyisgivenoffchieflythroughtheskin.Whenyouare{{U}}?54 ?{{/U}}yourskinistightandshowsgooseflesh.Whenyougetchilly 寒冷的youmustdancearoundtokeepwarmor{{U}}?55?{{/U}}youwill shiver颤抖.{{U}}?56?{{/U}}yourmusclesbegintoworkburnupfuel andproducemoreheat.Itisnot{{U}}?57?{{/U}}toshiversoyou usuallypreferwarmingupbyexerciseorput{{U}}?58?{{/U}}more clothestokeepheatin.??Whenyouarewarmtheskinisloose andsoft.Itissosupplied{{U}}?59?{{/U}}bloodthatheatisgivenoff rapidly.Ifyougettoohotyoubegintosweatand{{U}}?60 ?{{/U}}bodyheatisusedinevaporating?蒸发themoisture潮湿from yourskin.Youwearlessclothingtooinwarm{{U}}?61?{{/U}}orina warmroomsothatwarmthcanbegivenofffreely.Youfeelyoudon’t{{U}} ?62?{{/U}}exercisingbecauseyourbodyiswarm{{U}}?63 ?{{/U}}andtheextraheatproducedbyexercisemakesyou uncomfortable.??Youcanseefromthiswhyyou{{U}}?64 ?{{/U}}differentlyindifferentkindsofweather.Insummerwhenitiswarm youfeeltiredandlazy.Youdonotcaretoworkorplaybutenjoylyingand doingnothing.Whenyougetoutofdoorsinwinterthecoldairmakesyou feel{{U}}?65?{{/U}}Youwanttorunand play.
Theearthquakehascausedseriousdamagetothiscity.
Cometsarestillregardedwithfrightbysomepeople.
{{*HTML*}}??阅读下面的短文文中有15处空白每处空白给出了4个选项请根据短文的内容从4个选项中选择1个最佳答案 ??????{{B}}? ??????????? ?HowtheBodyKeepstheSameTemperature{{/B}}??The temperatureofyourbodyshouldbealwaysjustthesamenomatterwhetherthe weatherishotorcold.Thatiswhythedoctoruseshisthermometerwhenyouare sick.Whenyouarewellyourtemperatureisninety-eightandsixtenths degrees.Ifhefindsit{{U}}?51?{{/U}}thanthatitisasuresign thatsomethingiswrong.??Thebodykeepsthesametemperatureall thetimebecauseitbalances平衡theheatitproduces?and{{U}}?52 ?{{/U}}off.Itisalwaysburningupfoodandproducingheat.Itcanproduce heatfasterwhenitneedstoorgiveoffheatfasterwhenitbecomestoowarm. Let’ssee{{U}}?53?{{/U}}thishappens.??Theheatofyour bodyisgivenoffchieflythroughtheskin.Whenyouare{{U}}?54 ?{{/U}}yourskinistightandshowsgooseflesh.Whenyougetchilly 寒冷的youmustdancearoundtokeepwarmor{{U}}?55?{{/U}}youwill shiver颤抖.{{U}}?56?{{/U}}yourmusclesbegintoworkburnupfuel andproducemoreheat.Itisnot{{U}}?57?{{/U}}toshiversoyou usuallypreferwarmingupbyexerciseorput{{U}}?58?{{/U}}more clothestokeepheatin.??Whenyouarewarmtheskinisloose andsoft.Itissosupplied{{U}}?59?{{/U}}bloodthatheatisgivenoff rapidly.Ifyougettoohotyoubegintosweatand{{U}}?60 ?{{/U}}bodyheatisusedinevaporating?蒸发themoisture潮湿from yourskin.Youwearlessclothingtooinwarm{{U}}?61?{{/U}}orina warmroomsothatwarmthcanbegivenofffreely.Youfeelyoudon’t{{U}} ?62?{{/U}}exercisingbecauseyourbodyiswarm{{U}}?63 ?{{/U}}andtheextraheatproducedbyexercisemakesyou uncomfortable.??Youcanseefromthiswhyyou{{U}}?64 ?{{/U}}differentlyindifferentkindsofweather.Insummerwhenitiswarm youfeeltiredandlazy.Youdonotcaretoworkorplaybutenjoylyingand doingnothing.Whenyougetoutofdoorsinwinterthecoldairmakesyou feel{{U}}?65?{{/U}}Youwanttorunand play.
{{*HTML*}}{{B}}第三篇{{/B}} ???????{{B}} ?????ProblemsoftheElderly{{/B}}? ?Gerontologists老年人问题学者studyhowoldpeoplearetreatedwithinasociety andhowtheelderlydealwiththeinevitableproblemsofagingparticularly thoseinvolvinghealthandincome.Healthproblemsincludenormallossesin hearingeyesightandmemoryandtheincreasedpossibilityofchronic 慢性的diseases.Theselossesaregradualandproceedatdifferentratesforeach individual.Ingeneralthehealthofoldpeopletodayisbetterthanthatof earliergeneration--aconditionthatislikelytoimprovestillfurtherasmore peoplereceivebettermedicalcarethroughttheirlives.??Because mostoldpeoplearenolongerinthelaborforceasteadysourceofincomeis necessary.?Systemsofpensionsandbenefitsarecharacteristicof industrialsocieties.OneexampleisSocialSecurityintheU.S.whichisnow increasedautomaticallyasthecostoflivingrisesthusreducingsomewhatthe effectofinflation.??Althoughtheincomeofretiredpeopleis abouthalfthatofworkingpeoplemostmanagetoremainfinancially independent.??Incomeneedsandhealtharewhatpeopleconsider mostwhentheydecidewhethertoretireornot.Puttinganendtothelimiton theretirementageisnotexpectedtocausemanyworkerstostayonthejobif theycanaffordtoretire.TheneedtorelievestrainsontheSocialSecurity systemhoweverhasledtolegislationthatgraduallyraisestheageatwhich peoplecangetfullbenefits.Thismightforcethemtoworklongerinthe future.??Elderlypeoplethemselvesoftendisplayhighspirits satisfactionwithlifeandfeelingsofself-worth.Theimportantfactorsare healthandincome.Thetaskofmodernsocietiesistoensurethattheagedhave theirbasicneedsmetandthattheycancontinuetofunctioninthe community.AccordingtothefirstparagraphwhichofthefollowingisNOTaproblemofaging?
TheGrandCanyon StandingontherimoftheGrandCanyon大峡谷gazingacrossthisgiantwoundintheEarth’’ssurfaceavisitormightassumethatthecanyonhadbeencausedbysomeancientconvulsion震动.Infacttheeventsthatproducedthecanyonfarfrombeingsuddenandcatastrophicsimplyadduptotheslowandorderlyprocessoferosion. ManymillionsofyearsagotheColoradoPlateauintheGrandCanyonareacontained1000morefeetofrockthanitdoestodayandwasrelativelylevel.Theadditionalmaterialconsistedofsome14layeredformationsofrock.IntheGrandCanyonregiontheselayerswerelargelywornawayoverthecourseofmillionsofyears. Approximately65millionyearsagotheplateausflatsurfaceintheGrandCanyonareabulgedupwardfrominternalpressuregeologistsrefertothisbulgingactionsupwarding弯曲上升;itwasfollowedbyageneralelevationofthewholeColoradoPlateauaprocessthatisstillgoingon.Astheplateaugraduallyroseshallowriversthatwindedacrossitbegantorunmoreswiftlyandcutmoredefinitecourses.OneoftheseriverslocatedeastoftheupwardwastheancestoroftheColorado.AnotherriversystemcalledtheHualapaiflowingwestoftheupwardextendeditselfeastwardbycuttingbackintotheupwarditeventuallyconnectedwiththeancientColoradoandcaptureditswaters.Thenewriverthenbegantocarveoutthe277-mile-longtrenchthateventuallybecametheGrandCanyon.Geologistsestimatethatthisinitialcuttingactionbegannoearlierthan10millionyearsago. SincethentheCanyonforminghasbeencumulative.Tothecorrosiveforceoftheriveritselfhavebeenaddedotherfactors.Heatandcoldrainandsnowalongwiththevaryingresistanceoftherocksincreasetheopportunitiesforerosions.TheCanyonwallscrumbletheriveracquiresacuttingtool.Tonsofdebrisrainfallrunningoffthehighplateaucreatesfeederstreamsthatcarresidecanyons.Pushingslowlybackwardintotheplateauthesidecanyonsexposenewrocksandthepatternoferosioncontinues. Thepassagemainlydiscusses______.
Hecouldneverbecontentuntilhecouldaffordtobuythatbeautifulcar.
{{*HTML*}}? ?阅读下面的短文文章中有5处空白文章后面有6组文字请根据文章的内容选择5组文字将其分别放回文章原有位置以恢复文章原貌 ?????????? ????{{B}}EconomicGrowth{{/B}}??Theeconomy ofanationrequires{{U}}?46?{{/U}}.Totaloutputmustgrowifthe countryistoabsorbabout1.5millionnewworkerswhoenterthelaborforce eachyearandmoreworkerswhoarereplacedeachyearasaformoftechnological change.Ifthenationproducedthesamelevelofoutputeachyearinsteadof increasingitpeoplewouldhavefewerjobsgrowingunemploymentandadecline intheper-capita人均的incomeofthenation.Tomaintainorincreasetheexisting standardoflivingandtopreventunemploymentfromrising{{U}}?47 ?{{/U}}.Higherratesofemploymentandsubstantialper-capitaoutputgains seemtooccurwhentherealeconomicgrowthrateisover3%asitwasinthe years1983through1988.Recentexperienceshowsthatwitharealgrowthrate oflessthan2.5%theU.S.economysuffersfrom{{U}}?48 ?{{/U}}??Forexampleunemploymentattheendof1990was5.4% ofthelaborforce.Butbytheendof1991unemploymentwasmorethan6.6%of thelaborforce.Whydidthishappen?Simplybecausetherealoutputofgoods andservicesdeclinedin1991.Newmembersintothelaborforcecouldnotbe absorbedso{{U}}?49?{{/U}}.Furthermorealargenumberofworkers withdrewfromthelaborforcealtogetherbecause{{U}}?50?{{/U}}. Insteadofrisingin1991therealGDPactuallyfell0.7%.RealGDProseagain in1992by2.6%butunemploymentalsoroseto7.3%ofthelaborforce.GDP con～tinuedtoriseduring?1993gaineda3%.Atthesametimeunemployment stoodat6.8%ofthelaborforce.Per-capitaincomealsogrewagainduring 1993.A?unemploymentroseB?theywereunabletofindworkC ?ahealthyrateofeconomicgrowthD?outofworkE?they mustincreaserealgrossdomesticproductGDPcontinuouslyF?higher unemploymentandlimitedgainsinper-capitaoutputandincome
TheGrandCanyon StandingontherimoftheGrandCanyon大峡谷gazingacrossthisgiantwoundintheEarth’’ssurfaceavisitormightassumethatthecanyonhadbeencausedbysomeancientconvulsion震动.Infacttheeventsthatproducedthecanyonfarfrombeingsuddenandcatastrophicsimplyadduptotheslowandorderlyprocessoferosion. ManymillionsofyearsagotheColoradoPlateauintheGrandCanyonareacontained1000morefeetofrockthanitdoestodayandwasrelativelylevel.Theadditionalmaterialconsistedofsome14layeredformationsofrock.IntheGrandCanyonregiontheselayerswerelargelywornawayoverthecourseofmillionsofyears. Approximately65millionyearsagotheplateausflatsurfaceintheGrandCanyonareabulgedupwardfrominternalpressuregeologistsrefertothisbulgingactionsupwarding弯曲上升;itwasfollowedbyageneralelevationofthewholeColoradoPlateauaprocessthatisstillgoingon.Astheplateaugraduallyroseshallowriversthatwindedacrossitbegantorunmoreswiftlyandcutmoredefinitecourses.OneoftheseriverslocatedeastoftheupwardwastheancestoroftheColorado.AnotherriversystemcalledtheHualapaiflowingwestoftheupwardextendeditselfeastwardbycuttingbackintotheupwarditeventuallyconnectedwiththeancientColoradoandcaptureditswaters.Thenewriverthenbegantocarveoutthe277-mile-longtrenchthateventuallybecametheGrandCanyon.Geologistsestimatethatthisinitialcuttingactionbegannoearlierthan10millionyearsago. SincethentheCanyonforminghasbeencumulative.Tothecorrosiveforceoftheriveritselfhavebeenaddedotherfactors.Heatandcoldrainandsnowalongwiththevaryingresistanceoftherocksincreasetheopportunitiesforerosions.TheCanyonwallscrumbletheriveracquiresacuttingtool.Tonsofdebrisrainfallrunningoffthehighplateaucreatesfeederstreamsthatcarresidecanyons.Pushingslowlybackwardintotheplateauthesidecanyonsexposenewrocksandthepatternoferosioncontinues. Thepassagewouldmostlikelybefoundinatextbookonwhichofthefollowingsubjects?
{{*HTML*}}{{B}}第三篇{{/B}} ???????{{B}} ?????ProblemsoftheElderly{{/B}}? ?Gerontologists老年人问题学者studyhowoldpeoplearetreatedwithinasociety andhowtheelderlydealwiththeinevitableproblemsofagingparticularly thoseinvolvinghealthandincome.Healthproblemsincludenormallossesin hearingeyesightandmemoryandtheincreasedpossibilityofchronic 慢性的diseases.Theselossesaregradualandproceedatdifferentratesforeach individual.Ingeneralthehealthofoldpeopletodayisbetterthanthatof earliergeneration--aconditionthatislikelytoimprovestillfurtherasmore peoplereceivebettermedicalcarethroughttheirlives.??Because mostoldpeoplearenolongerinthelaborforceasteadysourceofincomeis necessary.?Systemsofpensionsandbenefitsarecharacteristicof industrialsocieties.OneexampleisSocialSecurityintheU.S.whichisnow increasedautomaticallyasthecostoflivingrisesthusreducingsomewhatthe effectofinflation.??Althoughtheincomeofretiredpeopleis abouthalfthatofworkingpeoplemostmanagetoremainfinancially independent.??Incomeneedsandhealtharewhatpeopleconsider mostwhentheydecidewhethertoretireornot.Puttinganendtothelimiton theretirementageisnotexpectedtocausemanyworkerstostayonthejobif theycanaffordtoretire.TheneedtorelievestrainsontheSocialSecurity systemhoweverhasledtolegislationthatgraduallyraisestheageatwhich peoplecangetfullbenefits.Thismightforcethemtoworklongerinthe future.??Elderlypeoplethemselvesoftendisplayhighspirits satisfactionwithlifeandfeelingsofself-worth.Theimportantfactorsare healthandincome.Thetaskofmodernsocietiesistoensurethattheagedhave theirbasicneedsmetandthattheycancontinuetofunctioninthe community.Theexpressioniftheycanaffordtoretireinparagraph4probablymeans______.
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