生命中，不斷地有人離開或進入。于是，望見的，看不見的；記住的，遺忘了。生命中，不斷地有得到和失落。于是，看不見的，望見了；遺忘的，記住了。然而，看不見的，是不是就等于不存在？記住的，是不是恒久不會消逝?英語六級閱讀理解練習題（五）溫馨提示：幫考網外語免費練習題，如需完整題庫請登錄 ://news.bangkaowIntoday'sworld,insuranceplaysavitalroleintheeconomicandsocialwelfareoftheentirepopulation.Thewishtoguardagainstdangerstolifeandpropertyisbasictohumannature.Byusingvariouskindsofinsurance,societyhasbeenabletoreducetheeffectsofsuchhazards.Nowhereisinsurancemoreimportantthaninthemanagementofabusiness.Inmanyinstances,lossesinasmallfirmcanmeanthedifferencebetweengrowthandfailure,vitalityandstagnation（停滯）.Veryfewsmallbusinesseshaveevenaportionofthefinancialresourcesavailabletolargerenterprises.Frequently,theymustoperateonaveryslightmarginiftheyhopetostayinbusiness.Andthus,theyareparticularlysensitivetounexpectedlosses.Withoutenoughinsurance,whathappenstosuchafirmwhentheownerdiesorissuddenlydisabled?Whenafirebreaksoutanddestroysthefirm'sbuildingorstock?Whenanemployeeisfoundtohavestolencompanyfunds?Whenacustomerisawardedaliabilityjudgmentforanaccident?Toooften,thebusinessisforcedtothewall,itsfutureoperationsdrasticallycurbed;sometimes,itisdamagedbeyondrepair,itsabilitytocontinuecompletelycrushed.Almostalways,asmallbusinessmanwouldfinditimpossibletohandlethefullburdenofhispotentialrisk.Theamountofmoneyhewouldhavetosetasidetocoverpossiblelosseswouldleavehimnothing,oralmostnothing,torunhisbusinesswith.Iflossweretooccurwhichhecouldrepairbyusinghisreservefund,whatassurancewouldhehavethatanotherloss—thesamekindordifferent一mightnotoccurnextweek,nextmonth?Butthenhewouldhavenoreservefundandlittlelikelihoodofstayinginbusinessatall.1.ThisselectiondealsmainlywiththerelationbetweeninsuranceandsocietyaccidentsandlossesC.businessfailuresD.theimportanceofinsurancetobusiness2.InParagraph3,“forcedtothewallnC.businessfailuresD.theimportanceofinsurancetobusiness2.InParagraph3,“forcedtothewallnmeansA.driventodespairB.stayinginastrongpositiondoingwellD.climbingupTheauthorthinksthat .accidentsalwayshappenabusinessmanshouldtakerisksbusinessesshouldhaveadequateinsuranceinsuranceisasocialwelfareprojectAdequateinsurancewilldoallofthefollowingEXCEPTthatitwill.A.freesomebusinessfundsB.addtobenefitsforemployeesC.relievesomemanagementproblemsD.provideforunexpectedincidentsTheword“curbed“inParagraph3isnearestinmeaningto.A.checkedB.advancedC.expandedD.disturbed答案：1.D2.A3.C4.B5.APlasticsarematerialswhicharesoftenedbyheatandsetintolastingformwhenshapedinamold.Somearenatural;somearesemi-synthetic(半合成的)，theresultofchemicalactiononnaturalsubstance;somearesynthetic,builtupfromtheconstituentsofoilorcoal.Allarebasedonthechemistryofcarbon,withitscapacityforformingchains.Themoleculesthatcomposethem(monomers)linktogetherinthesettingorcuring(硫化)processtoformchains(polymers),whichgiveplasticstheirflexiblestrength.Someplasticsretaintheirabilitytobesoftenedandreshaped;likewax,theyarethermoplastic.Otherssetpermanentlyintheshapestheyaregivenbyheatandpressure;likeeggs,theyarethermosetting.Fromindustrialbeginningsinthenineteenthcentury,plasticshavestruggledthroughahundredandtwentyyearsofglory,failure,disreputeandsuspicionontheslowroadtopublicacceptance.Now,atlast,onecanpositivelysaythatplasticsareappreciatedandenjoyedforwhattheyare;thattheymakemodernlifericher,morecomfortableandconvenient,andalsomorefun.Plasticsarewarmmaterials,sympathetictothehumantouch,andtheirtransformationintothingsthatcomeintocontactwithhumanbeingsisentirelyappropriate.Thefactthatthereareplasticantiquescomesasashocktomostpeople.Howcanamaterialthatseemssoessentiallytwentiethcentury,andonethatissomuchassociatedwithcheap,disposableproducts,hasahistoryatall?Itisayoungtechnology,andagreatpartofthefunofcollectingplasticsisthatbeautifulpiecesofhistoricalinterestcanstillbefoundverycheaply.Theword“sympathetic“inParagraph2mostprobablymeans.A.harmfulB.agreeableC.pitifulD.sorryItcanbeconcludedfromthispassagethat.plasticsaresyntheticmaterialsplasticswonpublicacceptance120yearsagoplasticsareveryharmfulinmodernlifeplasticsarecheapasantiquesWhichofthefollowingisessentialtocreateanytypeofplastics?A.Carbon.B.Eggs.C.Oil.D.Coal.Plasticsthathardenintopermanentshapesarecalled.A.chainedB.thermoplasticC.syntheticD.thermosettingWhichofthefollowingisthebesttitleforthepassage?TheImportanceofPlasticsintheNineteenthCentury.WhyPeopleAreSuspiciousofPlastics.TheDevelopmentofPlasticsasaModernMaterial.HowPlasticsAreManufactured.答案：1.B2.D3.A4.D5.CDuringthenineteenthandtwentiethcenturies,migrationshavetakenplacewithin_1_countries;thecitieswiththeirindustrieshaveattractedpeopleawayfromthecountry.Thepossibilityofearningafixed_2_inafactoryorofficewasmoreattractivethanthepossibilityofstayingonthefarmandhavingone'swork_3_byfrost,storms,ordroughts.Furthermore,thedevelopmentofagriculturalmachinerymadeitpossibleforfewerpeopletodothesame_4_ofwork.Thus,atthesametimewhentheindustrialrevolutionmadeitpossibletoproducegoodsmore_5_andmorequicklyinfactories,agriculturalrevolutionalsotookplace.Insteadofleavingfieldsemptyeverythirdyear,farmersbegantoplantcloverorsomeothercropthatwould6thesoil.Insteadofusingonlyanimalfertilizer,farmersbegantousechemicalfertilizerstokeepthesoilrich.ThesemethodshaveenabledFrenchfarmers,forexample,togetfivetimesasmuchwheataswas_7_fromthesamelandtwocenturiesago.Inmanycountriesfarmersfinditmore_8_toraiseonlyonecroporonekindofanimal.Theychoosethekindthatgivesthebestresults.Thentheysellallthattheyproduce,insteadoftryingtogrowalittleofeverythingandconsumewhattheygrow.Thisisamorefeasibletypeof―9―becausemodernmethodsandmachineryareadaptedtospecificanimalsandspecificcrops.Therefore,itwouldbetooexpensivetodoalltheworkbyhand,ortobuythe10neededforseveraldifferentkindsoffarming.salaryE.desertedI.equivalentM.destroyedfreelyF.operationJ.enrichN.certainprofitableG.amountK.fruitful0.cheaplyobtainedH.paymentL.equipmentobtainedH.paymentL.equipment答案：答案：1.N2.A3.M4,G5.06.J7.D8.C9.F10.LAgiftofthegods.AccordingtoanoldGreekmyth,Prometheusandhisbrother,Epimetheus,heroesofaraceofgiantscalledtheTitans,weregiventhetaskofcreatingman.Epimetheuswasalsotoprovidealltheanimalswithmeansofdefenseorflight.Tosomehegavecourage,strength,andclawswithwhichtofight,andtootherslonglegs,nimblefeet,orwingswithwhichtoescape.Solavish（慷慨的）washewiththesegiftstotheloweranimalsthathehadnothinglefttogivetoman.Prometheus,however,wasdeterminedthatmanshouldnotbeneglectedandso,accordingtothemyth,hegainedaccesstoheavenand1ightedhistorchatthechariotofthesun.Returningtoearth,hepresentedfiretoman,andwiththisgiftcameman,sdominionoveralltheearth.Thefirstcook.Ittookalongtime,however,tolearnhowtousethisgift.Forcenturiesmenlivedlikewildanimals.Theirfoodconsistedofnuts,herbs,fruit,andthefleshofanimals.Cookingwasunknown,andwhenawildanimalwascaptured,thesavagetoreitapartandatetherawflesh.Accordingtoonelegend,ahunter,afteralongtramp,succeededincatchingarabbit.Onhiswayhomehefoundasmoldering（緩慢燃燒的）firewhichhadbeenstartedbylightning.Throwinghisrabbitonalog,helaydownandwenttosleep.Whenheawoke,hefoundthathisrabbithadfallenintothefire.Inattemptingtorescueit,thesavagegotsomeofthejuiceoftheroastedrabbitonhisfingers.Byinstinct,heputhisburntfingerstohismouth,andthetastewassopleasingthatheimmediatelyfinishedtherabbit,andthisishowmanlearnedtocook.Reductionofmetals.Ageslater,manbegantousefiretomakemetalsandtoformthemintospearsandhatchetsforhuntingandfighting.Thealchemists,asweknow,usedfireintheirattemptstochangethebasemetalsintogold,andtodayfiresareburninginmanyfurnacesproducing,ifnotgold,metalsoffargreatervaluetotheprogressofcivilization.Copper,bronze,iron,andsteel,producedbyfire,havebeenthesteppingstonesofman'sprogressthroughtheages.Thechemistryinvolvedintheextraction,purification,andalloyingofmetalsissointerestingandofsuchgreatimportancethatvolumeshavebeenwrittenonthissubject.Heatinghomes.Wearesoaccustomedtolivinginheatedhomesthatitisonlywhensomethinggoeswrongwiththefurnacethatwegiveanythoughttotheblessedfire.Tothesavageshiveringinhiscave,however,afirewasarealblessing,evenifitdidfillhiseyeswithsmoke.KeepingthehomefiresburningwasadifficulttaskfortheAmericanIndian,whodelegatedthistohiswife.Woebetothesquaw(E[1第安女子或妻子)wholetthefiregoout.Inthewintertime,thefirewasbuiltonthegroundinthecenterofthetent,whichhadasmallholeinthetoptoactasasmokestack.EventhepalacesofthewealthyintheMiddleAgeswerecoldanddamp,thefireplacesbeingsoinefficientthatonlyaportionofoneroomcouldbeheatedatatime.Notuntilacomparativelyrecentdate(1742)werestovesinvented,andfurnaceswereunknownevenwhenyourgrandfatherwasaboy.Howfiresarestartedandstopped.Youhavelearnedthatburningisrapidoxidationwhichgivesofflightandheat.Inordertostartafire,threeconditionsarenecessary：(1)somethingtoburn;(2)somethingtosupportthecombustion;and(3)ameansoflightingthefuel(raisingittoitskindlingtemperature)。Havinglivedallhislifeinahomewherethefurnaceiskeptburningallwinter,theaveragepersonseldomthinksofthedifficultyofstartingafire.Togetsomeideaofthedifficultyofstartingfires,imagineyourselfshipwreckedlikeRobinsonCrusoeuponanuninhabitedisland.Tobuildafire,thefirstconditionwouldbemetbycollectingsomewood.Thesecondconditionwouldbenoproblemasairisalwayspresenttosupportcombustion.Thethirdcondition,raisingthefueltoitskindlingtemperature,wouldofferarealdifficulty.Twomethodshavebeenused.Thefirstistoemploytheheatoffrictioncausedbyrubbingtwodrystickstogether.Thissoundssimple,butmuchskillandpracticeareessentialtothesuccessofthisoperation.Thesecondmethodistomakesparksbystrikingtwopiecesofflint(極硬的東西，燧石)together.Thismayworkiftheoperatorispersistentandifhisfuelissufficientlyfineanddry.Butbeforehesucceedsingettingafirestartedbyeithermethod,ourRobinsonCrusoewilldosomethinkingabouttheusefulnessofthecommonmatch.Poisonmatches.Therearetwokindsofphosphorususedinmakingmatches,whiteandred.Whitephosphorushasanadvantageandadisadvantage.Whitephosphorusischeaperand,atonetime,itsusewasquitecommon.Whitephosphorusispoisonous,however,andforthisreasonitsuseinmakingmatchesisprohibitedbylawinnearlyallcivilizedcountries.Menworkinginmatchfactorieswhichusedwhitephosphorusweresubjecttoadiseasewhichcausedthejawbonestodecay.Thedangerofsmallchildrenbeingpoisonedbythesematchesisalsoevident.Fortunately,chemistshavediscoveredamethodofmakingaformofphosphoruswhichisnotpoisonous.Whenwhitephosphorusisgentlyheatedforseveralhoursinaclosedvesselfromwhichairisexcluded,itslowlychangesincolorandtheno-poisonousredphosphorusisformed.Inadditiontothefactthatitisnotpoisonous,redphosphorushasotheradvantages.Itskindlingtemperatureismuchhigherthanthatofthewhitevariety,andthismakesredphosphoruslessdangeroustoshipandtostore.Anothermethodofmakingphosphorussafeforuseinmatchesistocombineitwithsulphur.Todothis,thetwoelementsaremixedandheatedintheabsenceofair.Thephosphorussulphide,whichisformed,isnotpoisonous.Withthehelpofhisbrother,Prometheussucceededinpresentingfiretoman.Firegavemananadvantageoverotheranimals.Manlearnedtocookbyaccident.IntheMiddleAgeseventhepalacesofthewealthywerecoldbecausewoodwasmuchtooexpensive.Instrikingamatch,frictionraisesthephosphoruscompoundinthetiptothekindlingtemperature.Redphosphorusistheonlymeansofmakingphosphorussafe.7.Firehasplayedanimportantroleintheprogressofcivilization.8.ThesmallholeinthetopoftheAmericanIndiantentwasusedasa7.Firehasplayedanimportantroleintheprogressofcivilization.8.ThesmallholeinthetopoftheAmericanIndiantentwasusedasa9.Employeesinmatchfactoriesusedtosufferfromadiseasethejawbones.9.Employeesinmatchfactoriesusedtosufferfromadiseasethejawbones.10.Airisneededtostartafirebecauseit答案：I.N2.Y3.Y4.N5.NG6.N7.Y8?smokestack9.whichdecayed10.supportscombustionLazinessisasin（罪）,everyoneknowsthat.Wehaveprobablyallhadlecturespointingoutthatlazinessisimmoral,thatitiswasteful,andthatlazypeoplewillneveramounttoanythinginlife.Butlazinesscanbemoreharmfulthanthat,anditisoftencausedbymorecomplexreasonsratherthansimplewishtoavoidwork.Somepeoplewhoappeartobelazyaresufferingfrommuchmoreseriousproblems.Theymaybesodistrustfuloftheirfellowworkersthattheyareunabletojoininanygrouptaskforfearofridiculeorofhavingtheirideastolen.Thesepeoplewhoseemlazymayberuinedbyafearoffailurethatpreventsfruitfulwork.Orothersortsoffantasies（幻想）maypreventwork;somepeoplearesobusyplanning,sometimesplanninggreatdealsoffantasticachievementsthattheyareunabletodealwithwhatever“lesser”workisonhand.Stillotherpeoplearenotavoidingwork;strictlyspeaking,theyaremerelyprocrastinatingreschedulingtheirday.Lazinesscanactuallybehelpful.Likeprocrastinators,somepeoplemaylooklazywhentheyarereallythinking,planning,researching.Weshouldallrememberthatgreatscientificdiscoveriesoccurredbychance.Newtonwasn'tworkingintheorchardwhentheapplehithimandhedevisedthetheoryofgravity.Allofuswouldliketohavesomeone“lazy”buildthecarorstovewebuy,particularlyifthat“laziness”werecausedbytheworker'stakingtimetocheckeachstepofhisworkandtodohisjobright.Andsometimes,being“lazy”一thatis,,takingtimeoffforarest-isgoodfortheoverworkedstudentsorexecutives.Takingarestcanbeparticularlyhelpfultotheathletewhoistryingtoohardorthedoctorwho'ssimplyworkinghimselfovertimetoomanyeveningsattheclinic.Sobecarefulwhenyou'retemptedtocallsomeonelazy.Thatpersonmaybethinking,resting,orplanninghisorhernextwork.Themainideaofthispassageisthatlazinessisamoralsinthereareadvantagesanddisadvantagesinbeinglazylazinessisthesignofdeep-seatedemotionproblemslazypeopledomorecarefulworkThepassagestatesthatlazinessisadiseaselazinessismorebeneficialthanharmfulagooddefinitionoflazinessisemotionalillnesssomepeopleappearlazybecausetheyareinsecureWhichofthefollowingconclusionsdoesthepassagesupport?Mostofthetimelazinessisavirtue.Mostassemblyworkersarelazy.Thewordlazinessissometimesappliedincorrectly.Mostinsecurepeoplearelazy.Asusedinthispassage,theword“devised”(Para.2)meansA.understoodB.wroteC.madeD.proved5.A.doctorsB.athletesC.executivesD.thosewhooverworkthemselves答案：LB2.D3.C4.C5.D5.A.doctorsB.athletesC.executivesD.thosewhooverworkthemselves答案：LB2.D3.C4.C5.DWhatdowethinkwith?Onlythebrain?Hardly.Thebrainislikeatelephoneexchange.Itistheswitchboard,butnotthewholesystem.Itsfunctionistoreceiveincomingsignals,makeproperconnection,andsendthemessagesthroughtotheirdestination.Forefficientservice,thebodymustfunctionasawhole.Butwhereisthe“mind"？Isitinthebrain?Orperhapsinthenervoussystem?Afterall,canwesaythatthemindisinanyparticularplace?Itisnotathing,likealeg,oreventhebrain.Itisafunction,anactivity.Aristotle,twenty-threehundredyearsago,observedthatthemindwastothebodywhatcuttingwastotheax.Whentheaxisnotinuse,thereisnocutting.Sowiththemind."Mind,"saidCharlesILWoolbert,aiswhatthebodyisdoing.”Ifthisactivityisnecessaryforthinking,itisalsonecessaryforcarryingthoughtfromonepersontoanother.Observehowpeoplegoaboutthebusinessofordinaryconversation.Ifyouhaveneverdonethispainstakingly,youhaveasurpriseinstore,forgoodconversationalistsare