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Unit2Robotsusinglanguage课时作业一、单项填空1.EventhoughthewayLinDaiyuexpressesherfeelingsmaybetoamodernaudience,itisrootedinhercharacterandmakeswhosheis.A.allergicB.foreignC.sensitiveD.fundamental2.Youshouldfirstexploreyourtalentsandgettoknowyourselfsoastomakealistofyouthinkyourrealinterestslie.A.thatB.whatC.whereD.how3.AlbertEinsteinwasbornin1879.Asachild,fewpeopleguessedthatheafamousscientistwhosetheorieswouldchangetheworld.A.hasbeenB.hadbeenC.wasgoingtobeD.was4.—Iwonderwhatmakesyouagoodsalesperson.—Iasawaiterforthreeyears,whichcontributesalottomytoday’swork.A.serveB.haveservedC.hadservedD.served5.China’sSilkRoadEconomicBelt,accomplished,willquickentheeconomicgrowthofthecountriesalongtheroute.A.unlessB.thoughC.onceD.as6.—AgroupofteenmountaineershaveplannedtoconquerthesecondhighestmountaininEurope.—,theymaysucceed.A.FavorableastheconditionbeingB.IftheconditionbefavorableC.TheconditionisfavorableD.Theconditionbeingfavorable7.regulartraininginnursing,shecouldhardlycopewiththeworkatfirst.A.NotreceivedB.SincereceivingC.HavingnotreceivedD.Nothavingreceived8.—It’ssaidthatLindawaspickedoutasavolunteerEnglishteacher.—Yes.Iaboutitintheschoolnewspaper.A.wasreadingB.hadreadC.wouldreadD.willread9.—WhatdoyouthinkofStevenHawking?—Well,despitehisdisabledbody,hewasamanofscientificnature,worthyofadmiration.A.oneB.whoC.thatD.this10.Trytotoeachpersonallyourkindnessandunderstandingandtheworldwillbeabetterplacetolivein.A.appealB.caterC.extendD.attach二、阅读理解AIntheUnitedStatesalone,over100millioncell-phonesarethrownawayeachyear.Cell-phonesarepartofagrowingmountainofelectronicwastelikecomputersandpersonaldigitalassistants.Theelectronicwastestreamisincreasingthreetimesfasterthantraditionalgarbageasawhole.Electronicdevicescontainvaluablemetalssuchasgoldandsilver.ASwissstudyreportedthatwhiletheweightofelectronicgoodsrepresentedbypreciousmetalswasrelativelysmallincomparisontototalwaste,theconcentration(含量)ofgoldandotherpreciousmetalswashigherinso-callede-wastethaninnaturallyoccurringminerals.Electronicwastesalsocontainmanypoisonousmetals.Evenwhenthemachinesarerecycledandtheharmfulmetalsremoved,therecyclingprocessofteniscarriedoutinpoorcountries,inpracticallyuncontrolledwayswhichallowmanypoisonoussubstancestoescapeintotheenvironment.Creatingproductsoutofrawmaterialscreatesmuchmorewastematerial,upto100timesmore,thanthematerialcontainedinthefinishedproducts.Consideragainthecell-phone,andimaginetheminesthatproducedthosemetals,thefactoriesneededtomaketheboxandpackaging(包装)itcamein.Manywastesproducedintheproducingprocessareharmfulaswell.TheU.S.EnvironmentalProtectionAgencynotesthatmostwasteisdangerousinthat“theproduction,distribution,anduseofproducts—aswellasmanagementoftheresultingwaste—allresultingreenhousegasrelease.”Individualscanreducetheircontributionbycreatinglesswasteatthestart—forinstance,buyingreusableproductsandrecycling.Inmanycountriestheconceptofextendedproducerresponsibilityisbeingconsideredorhasbeenputinplaceasanincentive(动机)forreducingwaste.Ifproducersarerequiredtotakebackpackagingtheyusetoselltheirproducts,wouldtheyreducethepackaginginthefirstplace?Governments’incentivetorequireproducerstotakeresponsibilityforthepackagingtheyproduceisusuallybasedonmoney.Why,theyask,shouldcitiesortownsberesponsibleforpayingtodealwiththebubblewrap(气泡垫)thatencasedyourtelevision?Fromthegovernments’pointofview,aprimarygoaloflawsrequiringextendedproducerresponsibilityistotransferboththecostsandthephysicalresponsibilityofwastemanagementfromthegovernmentandtax-payersbacktotheproducers.1.BymentioningtheSwissstudy,theauthorintendstotellusthat.A.theweightofe-goodsisrathersmallB.e-wastedeservestobemadegooduseofC.naturalmineralscontainmorepreciousmetalsD.thepercentageofpreciousmetalsisheavyine-waste2.Theresponsibilityofe-wastetreatmentshouldbeextended.A.fromproducerstogovernmentsB.fromgovernmentstoproducersC.fromindividualstodistributorsD.fromdistributorstogovernments3.Whatdoesthepassagemainlytalkabout?A.Theincreaseine-waste.B.Thecreationofe-waste.C.Theseriousnessofe-waste.D.Themanagementofe-waste.BHoweverwealthywemaybe,wecanneverfindenoughhoursinthedaytodoeverythingwewant.Economicsdealswiththisproblemthroughtheconceptofopportunitycost,whichsimplyreferstowhethersomeone’stimeormoneycouldbebetterspentonsomethingelse.Everyhourofourtimehasavalue.Foreveryhourweworkatonejobwecouldquiteeasilybedoinganother,orbesleepingorwatchingafilm.Eachoftheseoptionshasadifferentopportunitycost—namely,whattheycostusinmissedopportunities.Sayyouintendtowatchafootballmatchbuttheticketsareexpensiveanditwilltakeyouacoupleofhourstogettoandfromthestadium.Whynot,youmightreason,watchthegamefromhomeandusetheleftovermoneyandtimetohavedinnerwithfriends?This—thealternativeuseofyourcashandtime—istheopportunitycost.Foreconomists,everydecisionismadebyknowledgeofwhatonemustforgo—intermsofmoneyandenjoyment—inordertotakeitup.Byknowingpreciselywhatyouarereceivingandwhatyouaremissingouton,yououghttobeabletomakebetter-informed,morereasonabledecisions.Considerthatmostfamouseconomicruleofall:there’snosuchth