新概念第四册课文打印版.docx

新概念第四册课文打印版.docx

《新概念第四册课文打印版.docx》由会员分享，可在线阅读，更多相关《新概念第四册课文打印版.docx（42页珍藏版）》请在冰豆网上搜索。

新概念第四册课文打印版

Lesson1Findingfossilman

Wecanreadofthingsthathappened5,000yearsagointheNearEast,wherepeoplefirstlearnedtowrite.Buttherearesomepartsoftheworldwhereevennowpeoplecannotwrite.Theonlywaythattheycanpreservetheirhistoryistorecountitassagas--legendshandeddownfromonegenerationofanother.Theselegendsareusefulbecausetheycantellussomethingaboutmigrationsofpeoplewholivedlongago,butnonecouldwritedownwhattheydid.AnthropologistswonderedwheretheremoteancestorsofthePolynesianpeoplesnowlivinginthePacificIslandscamefrom.ThesagasofthesepeopleexplainthatsomeofthemcamefromIndonesiaabout2,000yearsago.

Butthefirstpeoplewhowerelikeourselveslivedsolongagothateventheirsagas,iftheyhadany,areforgotten.Soarchaeologistshaveneitherhistorynorlegendstohelpthemtofindoutwherethefirst'modernmen'camefrom.

Fortunately,however,ancientmenmadetoolsofstone,especiallyflint,becausethisiseasiertoshapethanotherkinds.Theymayalsohaveusedwoodandskins,butthesehaverottedaway.Stonedoesnotdecay,andsothetoolsoflongagohaveremainedwheneventhebonesofthemenwhomadethemhavedisappearedwithouttrace.

Lesson2Sparethatspider

Why,youmaywonder,shouldspidersbeourfriends?

Becausetheydestroysomanyinsects,andinsectsincludesomeofthegreatestenemiesofthehumanrace.Insectswouldmakeitimpossibleforustoliveintheworld;theywoulddevourallourcropsandkillourflocksandherds,ifitwerenotfortheprotectionwegetfrominsect-eatinganimals.Weowealottothebirdsandbeastswhoeatinsectsbutallofthemputtogetherkillonlyafractionofthenumberdestroyedbyspiders.Moreover,unlikesomeoftheotherinsecteaters,spidersneverdotheharmtousorourbelongings.

Spidersarenotinsects,asmanypeoplethink,norevennearlyrelatedtothem.Onecantellthedifferencealmostataglance,foraspideralwayshaseightlegsandinsectnevermorethansix.

Howmanyspidersareengagedinthisworknoourbehalf?

OneauthorityonspidersmadeacensusofthespidersingrassfieldinthesouthofEngland,andheestimatedthatthereweremorethan2,250,000inoneacre;thatissomethinglike6,000,000spidersofdifferentkindsonafootballpitch.Spidersarebusyforatleasthalftheyearinkillinginsects.Itisimpossibletomakemorethanthewildestguessathowmanytheykill,buttheyarehungrycreatures,notcontentwithonlythreemealsaday.IthasbeenestimatedthattheweightofalltheinsectsdestroyedbyspidersinBritaininoneyearwouldbegreaterthanthetotalweightofallthehumanbeingsinthecountry.

Lesson3Matterhornman

Modernalpiniststrytoclimbmountainsbyaroutewhichwillgivethemgoodsport,andthemoredifficultitis,themorehighlyitisregarded.Inthepioneeringdays,however,thiswasnotthecaseatall.Theearlyclimberswerelookingfortheeasiestwaytothetop,becausethesummitwastheprizetheysought,especiallyifitandneverbeenattainedbefore.Itistruethatduringtheirexplorationstheyoftenfaceddifficultiesanddangersofthemostperilousnature,equippedinamannerwithwouldmakeamodernclimbershudderatthethought,buttheydidnotgooutoftheirwaytocourtsuchexcitement.Theyhadasingleaim,asolitarygoal--thetop!

Itishardforustorealizenowadayshowdifficultitwasforthepioneers.ExceptforoneortwoplacessuchasZermattandChamonix,whichhadrapidlybecomepopular,Alpinevillagetendedtobeimpoverishedsettlementscutofffromcivilizationbythehighmountains.Suchinnsasthereweregenerallydirtyandflea-ridden;thefoodsimplylocalcheeseaccompaniedbybreadoftentwelvemonthsold,allwasheddownwithcoarsewine.Oftenavalleyboastednoinnatall,andclimbersfoundshelterwherevertheycould--sometimeswiththelocalpriest（whowasusuallyaspoorashisparishioners）,sometimeswithshepherdsorcheese-makers.Invariablythebackgroundwasthesame:

dirtandpoverty,andveryuncomfortable.Formenaccustomedtoeatingseven-coursedinnersandsleepingbetweenfinelinensheetsathome,thechangetotheAlpsmusthaveveryhardindeed.

Lesson4Seeinghands

SeveralcaseshavebeenreportedinRussiarecentlyofpeoplewhocandetectcolourswiththeirfingers,andevenseethroughsolidandwalls.Onecaseconcernsandeleven-year-oldschoolgirl,VeraPetrova,whohasnormalvisionbutwhocanalsoperceivethingswithdifferentpartsofherskin,andthroughsolidwalls.Thisabilitywasfirstnoticedbyherfather.Onedayshecameintohisofficeandhappenedtoputherhandsonthedoorofalockedsafe.Suddenlysheaskedherfatherwhyhekeptsomanyoldnewspaperslockedawaythere,andevendescribedthewaytheyweredoneupinbundles.

Vera'scurioustalentwasbroughttothenoticeofascientificresearchinstituteinthetownofUlyanovsk,nearwhereshelives,andinAprilshewasgivenaseriesoftestsbyaspecialcommissionoftheMinistryofHealthoftheRussianFederalRepublic.Duringthesetestsshewasabletoreadanewspaperthroughanopaquescreenand,strangerstill,bymovingherelbowoverachild'sgameofLottoshewasabletodescribethefiguresandcoloursprintedonit;and,inanotherinstance,wearingstockingsandslippers,tomakeoutwithherfoottheoutlinesandcoloursofapicturehiddenunderacarpet.Otherexperimentsshowedthatherkneesandshouldershadasimilarsensitivity.DuringallthesetestsVerawasblindfold;and,indeed,exceptwhenblindfoldshelackedtheabilitytoperceivethingswithherskin.Itwasalsofoundthatalthoughshecouldperceivethingswithherfingersthisabilityceasedthemomentherhandswerewet.

Lesson5Youth

Peoplearealwaystalkingabout'theproblemofyouth'.Ifthereisone--whichItakeleavetodoubt--thenitisolderpeoplewhocreateit,nottheyoungthemselves.Letusgetdowntofundamentalsandagreethattheyoungareafterallhumanbeings--peoplejustliketheirelders.Thereisonlyonedifferencebetweenanoldmanandayoungone:

theyoungmanhasagloriousfuturebeforehimandtheoldonehasasplendidfuturebehindhim:

andmaybethatiswheretherubis.

WhenIwasateenager,IfeltthatIwasjustyounganduncertain--thatIwasanewboyinahugeschool,andIwouldhavebeenverypleasedtoberegardedassomethingsointerestingasaproblem.Foronething,beingaproblemgivesyouacertainidentity,andthatisoneofthethingstheyoungarebusilyengagedinseeking.

Ifindyoungpeopleexciting.Theyhaveanairoffreedom,andtheynotadrearycommitmenttomeanambitionsorloveofcomfort.Theyarenotanxioussocialclimbers,andtheyhavenodevotiontomaterialthings.Allthisseemstometolinkthemwithlife,andtheoriginsofthings.It'sasiftheywere,insomesense,cosmicbeingsinviolentandlovelycontrastwithussuburbancreatures.AllthatisinmymindwhenImeetayoungperson.Hemaybeconceited,ill-mannered,presumptuousorfatuous,butIdonotturnforprotectiontodrearyclichesaboutrespectofelders--asifmereagewereareasonforrespect.Iacceptthatweareequals,andIwillarguewithhim,asanequal,ifIthinkheiswrong.

Lesson6Thesportingspirit

IamalwaysamazedwhenIhearpeoplesayingthatsportcreatesgoodwillbetweenthenations,andthatifonlythecommonpeoplesofthewouldcouldmeetoneanotheratfootballorcricket,theywouldhavenoinclinationtomeetonthehattlefield.Evenifonedidn'tknowfromconcreteexamples（the1936OlympicGames,forinstance）thatinternationalsportingcontestsleadtoorgiesofhatred,onecoulddeduceiffromgeneralprinciples.

Nearlyallthesportspractisednowadaysarecompetitive.Youplaytowin,andthegamehaslittlemeaningunlessyoudoyourutmosttowin.Onthevillagegreen,whereyoupickupsidesandnofeelingoflocalpatriotismisinvolved,itispossibletoplaysimplyforthefunandexercise:

butassoonasathequestionofprestigearises,assoonasyoufeelthatyouandsomelargerunitwillbedisgracedifyoulose,themostsavagecombativeinstinctsarearoused.Anyonewhohasplayedeveninaschoolfootballmatchknowsthis.Attheinternationallevel,sportisfranklymimicwarfare.Butthesignificantthingisnotthebehaviouroftheplayersbuttheattitudeofthespectators:

and,behindthespectators,ofthenationswhoworkthemselvesintofuriesovertheseabsurdcontests,andseriouslybelieve--atanyrateforshortperiods--thatrunning,jumpingandkickingaballaretestsofnationalvirtue.

Lesson7Bats

Notallsoundsmadebyanimalsserveaslanguage,andwehaveonlytoturntothatextraordinarydiscoveryofecho-locationinbatstoseeacaseinwhichthevoiceplaysastrictlyutilitarianrole.

Togetafullappreciationofwhatthismeanswemustturnfirsttosomerecenthumaninventions.Everyoneknowsthatifheshoutsinthevicinityofawalloramountainside,anechowillcomeback.Thefurtheroffthissolidobstruction,thelongertimewillelapseforthereturnoftheecho.Asoundmadebytappingonthehullofashipwillbereflectedfromtheseabottom,andbymeasuringthetimeintervalbetweenthetapsandthereceiptoftheechoes,thedepthoftheseaatthatpointcanbecalculated.Sowasborntheecho-soundingapparatus,nowingeneraluseinships.Everysolidobjectwillreflectasound,varyingaccordingtothesizeandnatureoftheobject.Ashoaloffishwilldothis.Soitisacomparativelysimplestepfromlocatingtheseabottomtolocatingashoaloffish.Withexperience,andwithimprovedap