国开在线答案
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2022-09-12
[单选] He______ hisbaggageamonghundredsofothers.
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2022-09-12
[单选] Someexpertsthinkreadingisthefundamentalskillupon ______ schooleducationdepends.
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2022-09-12
[简答] 二、阅读理解：阅读下面的短文，根据文章内容进行判断，正确写“T”错误写“F”。课外选材WideWorldofRobotsEngineerswhobuildandprogramrobotshavefascinatingjobs.Theseresearcherstinker(修补)withmachinesinthelabandwritecomputersoftwaretocontrolthesedevices.“They'rethebesttoysoutthere,“saysHowleChosetatCarnegieMellonUniversityinPittsburgh.Chosetisaroboticist,apersonwhodesigns,buildsorprogramsrobots.WhenChosetwasakid,hewasinterestedinanythingthatmoved--cars,trains,animals.HeputmotorsonTinkertoycarstomakethemmove.Later,inhighschool,hebuiltmobilerobotssimilartosmallcars.Hopingtocontinueworkingonrobots,hestudiedcomputerscienceincollege.ButwhenhegottograduateschoolattheCalifomiaInstituteofTechnologyinPasadena,Choset'slabmateswereworkingonsomethingevencoolerthanremotelycontrolledcars:roboticsnakes.Somerobotscanmoveonlyforward,backward,leftandright.Butsnakescantwist(扭曲)inmanydirectionsandtraveloveralotofdifferenttypesofterrain(地形).“Snakesarefarmoreinterestingthanthecars,“Chosetconcluded.AfterhestartedworkingatCarnegieMellon,Chosetandhiscolleaguestherebagandevelopingtheirownsnakerobots.Choset'steamprogrammedrobotstoperformthesamemovementsasrealsnakes,suchasslidingandinchingforward.Therobotsalsomovedinwaysthatsnakesusuallydon't,suchasrolling.Choset'ssnakerobotscouldcrawl(爬行)throughthegrass,swiminapondandevenclimbaflagpole.ButChosetwonderedifhissnakesmightbeusefulformedicineaswell.Forsomeheartsurgeries,thedoctorhastoopenapatient'schest,cuttingthroughthebreastbone.Recoveringfromthesesurgeriescanbeverypainful.Whatifthedoctorcouldperformtheoperationbyinsteadmakingasmallholeinthebodyandsendinginathinroboticsnake?ChosetteamedupwithMarcoZenati,aheartsurgeonnowatHarvardMedicalSchool,toinvestigatetheidea.Zenatipracticedusingtherobotonaplasticmodelofthechestandtheytestedtherobotinpigs.AcompanycalledMedroboticsinBostonisnowadaptingthetechnologytosurgeriesonpeople.Evenafter15yearsofworkingwithhisteam'screations,“Istilldon'tgetboredofwatchingthemotionofmyrobots,“Chosetsays. 1.Chosetbegantobuildrobotsinhighschool.2.Snakerobotscouldmoveinonlyfourdirections.3.Chosetdidn'tbegindevelopinghisownsnakerobotsuntilhestartedworkingatCarnegieMellon.4.Zenatitestedtherobotonpeopleafterusingitinpigs.5.TherobotictechnologyforsurgeriesonpeoplehasbroughtahandsomeprofittoMedrobotics.
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2022-09-12
[单选] Animalfarming abouthalfofallhuman-causedgreenhousegases.
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2022-09-12
[简答] 二、阅读理解：阅读下面的短文，根据文章内容从A、B、C三个选项中选出一个最佳选项。（教材课文原文）2050,theworld'spopulationtoriseto9billionfromjustover7billioncurrently.Proponentsofgeneticallymodifiedfoodssaytheyaresafeandcanboostharvestsinbadconditionsbyprotectingagainstpests,weedsanddrought.This,theyargue,willbeessentialtomeetingtheneedsofaboomingpopulationindecadestocomeandavoidingstarvation.DougGurian-Sherman,seniorscientistforthefoodandenvironmentprogramattheUnionofConcernedScientists,anadvocacygroup,saidgeneticengineeringforinsectresistancehasprovidedonlyamodestincreaseinyieldssincethe1990sanddrought-resistantstrainshaveonlyreducedlossesfromdrought.
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2022-09-12
[单选] Theyshouldnevertrytopursueprofit healthandlifeofpeople.
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2022-09-12
[简答] 二、阅读理解：阅读下面的短文，根据文章内容进行判断，正确写“T”错误写“F”。教材课文原文TheCompanyLeadingtheFutureofFarmingHere'sacrazyidea:Combinebioprintingandtissueengineeringto“print“animalproductsandtacklesomeoftheplanet'sbiggestproblems.Animalfarming,afterall,accountsforabouthalfofallhuman-causedgreenhousegases,takingplaceonone-thirdoftheavailable,non-frozenlandonEarth.Alltofeedpeople'sappetitesfor300milliontonsofmeatayear.ModernMeadowisaMissouri-basedstartupthatengineerstissuestocreatelab-grownediblemeat,inaprocessthateliminatesmanyofthenegativeenvironmenteffectsassociatedwithtraditionallivestockpractices.Thecompanyclaimsthatbycarefullylayeringmixturesofcellsofdifferenttypesinaspecificstructure,in-vitromeatproductionbecomesfeasible.It’ssetashort-termgoalofprintingasliverofmeataroundtwocentimetersbyonecentimeter,andlessthanhalfamillimeterthick,whichisedible.ThecompanyexplainsinasubmissiontotheUnitedStatesDepartmentofAgriculture:“Thetechnologyhasseveraladvantagesincomparisontoearlierattemptstoengineermeatinvitro.Thebio-inkparticlescanbereproduciblypreparedwithmixturesofcellsofdifferenttype.Printingensuresconsistentshape,whilepost-printingstructureformationandmaturationinthebioreactorfacilitatesconditioning.”However,itadmitsthattheroadaheadisstrewnwithdifficulties.“Theconsumeracceptanceofsuchproductsmaynotbewithoutchallenges.Weexpectitwillfirstappealtoculinaryearly-adopterconsumersandthesegmentofthevegetariancommunitythatrejectsmeatforethicalreasons.Withreductioninprice,itcanreachthemasseswithreligiousrestrictionsonmeatconsumption(peoplerestrictedtoHindu,Kosher,Halaldiets)andfinallypopulationswithlimitedaccesstosafemeatproduction.”Whateverthefinaloutcome,lab-grownediblemeatisnolongerintherealmofsciencefiction.Itiscoming. 1.Animalfarmingisresponsiblefortheoccurrenceofgreenhousegases.2.ModernMeadowisanewly-startedbusinesswhichaimstomakeprofitsbyproducinglab-grownediblemeat.3.ThemethodModernMeadowadoptedtoproducein-virtomeatisbylayeringmixturesofcellsofdifferenttypesinaspecificstructure.4.Thereisnomeatengineeredoutsidelivingbodiesbefore.5.Thislab-grownmeathasalreadywidelyreceivedbythemasses.
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2022-09-12
[单选] 成人习惯于说：“你如果不多加衣服就会感冒。“孩子则不能接受这种预见的后果，她看到裙子好看，就要穿。这说明这个孩子的思维还处在具体形象思维阶段。
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2022-09-12
[单选] 以下说法正确的是（ ）。
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2022-09-12
[单选] 儿童理解语言迅速发展的阶段指（ ）。
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