电大考试英语II2历届试题汇编Word格式.docx

电大考试英语II2历届试题汇编Word格式.docx

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GeneticEngineering

Manypeopleareunawarethatalotofthefoodstheyeateveryday,suchasbreadhamandcheese,havebeenalteredbyusingnewtechnology.Foodcanbechanged.Itcanbemadetotastedifferentortolookdifferent—carrotscanbemadetotasteofchocolateandapplescanbemaderedder.Somefoodthatappearsthesamehasbeenscientificallyimproved,forexample,fishcanbemadetogrowfaster.Shouldwebepleasedorworried?

Willnewtechnologybringbenefits,orisitabouttogooutofcontrol?

Geneticallyengineeredfoodsareproducedbytakinggeneticmaterialfromonespeciesandtransferringittoanother.Forexample,an‘antifreeze’genewhichappearsnaturallyinArcticfishhasbeenintroducedintotomatoesandstrawberriessothattheydon'

tfreezeincoldweather;

ahumangenehasbeenintroducedintopigstomakethemgrowmorequickly.

Someclaimgreatadvantages.Theypointoutthatcropscanbemadestrongerandmorediseaseresistant,sopesticidescanbereduced.Theyalsomaintainthatfoodcanbemademorenutritiousorthatthefatcontentcanbereducedtomakeithealthier.

Scientistsareworkinghardtodevelopbetteraerialsformobilephones,aspokesmanforPhikiaPhonessaidtoday.‘Itreallyirritatesuserswhentheylosethesignalinthemiddleofacall,sowearedevelopingnewaerialsthatwillenableuserstoreceivestrongersignals.Manyusersreportedthatwhentheyweretravelling,thesignalwasoftenlost’,saidthespokesman.Thenewaeralsaredesignedtoavoidlosingthesignalbyreceivingthemessageonawiderrangeofradiofrequencies.‘Wehavelearntthatthisisamajorconcernforphoneusers’saidthespokesman.Thenewphoneshaveaflexibleexternalaerial,whichuserswillhavetogetusedtotouchingtheirearorhead.Theaerials--makethephonesabletopickupawiderrangeofsignals.Thecompanyspokesmaninsistedthat_thiswasnotapotentialdanger–“Every_safetyregulationhasbeenfollowed”,hetoldourreporter.“IfI’dhadoneofthesephonesthismorning,Iwouldn’thavemissedmytraincominghere”,jokedthespokesman.

ThebiggestadventureI'

veeverhadwastrekkinginThailand.Wehiredaguide（16）totakeustoavillageinthejungle.Wedidn'

tknowthathe（17）hadneverbeentherebefore.（18）Unlesswereachedthevillage,wewouldn'

tbeabletofindsomewheretosleep,（19）sowewantedtogetthereinabout8hours.Aftertwohoursweallrealizedwewerelost.The（20）furtherwewalked,themoreconfusedwebecame.Luckilyafterafurther4hourswemetsomehunters.Theydidn'

tspeakthesamelanguageasourguide,butwewereableto（21）getacrossthatwewerelost.They（22）redirectedustowardsthevillage.Itwasafterdarkwhenwearrivedthere.Wehadbeenwalking（23）forover14hoursandwewere（24）absolutelyexhausted.Wehadbeenverylucky;

ifwe（25）hadn'

tmetthehunters,wewouldhavehadtosleepinthejungle.

IwastravellingaloneinWesternAustralialastyear,andonedayisetofftoclimbahighpeakinthatarea.Althoughinthesummertherearemanytourists,1wasthereoutofseasonbecausethereweren'

tanytourgroups.SoonafterIreachedthetop,itbegantodrizzleandthefogcamedown.Verysoon,itwassothickthatpath.1takemyphonewithmeeverywherebecauseyouneverknowwhenyouwillneedit.

EventuallyIcalledmydad,whowas9,000milesawayintheUK.Hetoldmetophonethelocalemergencyservices,butIfeltsostupidthatIdidn'

twantto.Luckily,mydadrealisedthisandmadeuphismindtocallthemhimself.TherescuerscalledmeonmobiletofindoutexactlywhereIwas,butunfortunatelythebatteryranoutafterfiveseconds.Ilaydownunderarockandwaited--itwasnearlynighttimeandIwascoldandwet.Justastheywereabouttocalloffthesearchforthenight,theyfoundme.Fortunatelyonerescuerhadsaid'

Let'

stryforjustfivemoreminutes.'

Iftheyhadgivenup,Iwouldhavedied.

Manypeopleareunawarethatalotofthefoodstheyeateveryday,suchasbread,hamandcheese,havebeenalteredbyusingnewtechnology.Foodcanbechanged.Itcanbemadetotastedifferentortolookdifferent-carrotscanbemadetotasteofchocolateandapplescanbemaderedder.Somefoodthatappearsthesamehasbeenscientificallyimproved,forexample,fishcanbemadetogrowfaster.Shouldwebepleasedorworried?

Geneticallyengineeredfoodsareproducedbytakinggenericmaterialfromonespeciesandtransferringittoanother.Forexample,an‘antifreeze’genewhichappearsnaturallyinArcticfishhasbeenintroducedintotomatoesandstrawberries_sothat_theydon’tfreezeincoldweather,ahumangenehasbeenintroducedintopigstomaketh