第五次在线考试英语试题+答案.docx
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第五次在线考试英语试题+答案.docx
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第五次在线考试英语试题+答案
第五次在线考试
英 语
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第一部分 阅读(共两节,满分50分)
第一节 (共15小题;每小题2.5分,满分37.5分)
阅读下列短文,从每题所给的A、B、C、D四个选项中选出最佳选项。
A
Someofthegreatestscientistsofalltimearewomenwhohavemadeimportantdiscoveriesinavarietyoffieldsinscience.Severaloftheircontributionsthroughouthistoryareevenmorethanmenscontributions.Ourlistofthemostfamousfemalescientistsbelowareorganizedinorderofpopularitysoyoucanreadabouttheadvancementsthattheymade.
MarieCurie(1867-1934)
FamousFor:
Workonradioactivity
MarieCuriewasthefirstwomantowintheNobelPrizeandtheonlywomantowinthisawardintwofields:
PhysicsandChemistry.ShediscoveredpoloniumandradiumandherworkhelpedwiththecreationofX-rays.
JaneGoodall(1934)
FamousFor:
Primate(灵长类)studies
JaneGoodallisknownworld-wideforhergroundbreakingstudiesonprimates.Sheisconsideredasthetopexpertonchimpsintheworldandisperhapsbestknownforher45-yearstudyonthesociallivesoftheseanimalsinTanzania.
RitaLevi-Montalcini(1909-2012)
FamousFor:
Nervegrowthstudies
RitaLevi-Montalciniwasaneurologist(神经病学家)whowontheNobelPrizeinPhysiologyorMedicinein1986forherfindingsinNerveGrowthFactor(NGF).ShewasthefirstNobelprizewinnertolivepasther100thbirthday.
LiseMeitner(1878-1968)
FamousFor:
Workonradioactivityandnuclearphysics
LiseMeitnerwasakeymemberofagroupthatdiscoverednuclearfission(裂变).Oneofhercolleagues,OttoHahn,wasgiventheNoblePrizeforthiswork.ThatMeitnerdidntgettheawardisconsideredtobeahugeerrorbytheNobelcommittee.
1.Whoisstillcontributingtotheworld?
A.MarieCurie.B.JaneGoodall.
C.RitaLevi-Montalcini.D.LiseMeitner.
2.WhatdidRitaLevi-Montalcinireseachon?
A.Nervegrowth.B.Thewildlife.
C.Nuclearexplosion.D.Radioactivity.
3.WhatdoweknowaboutLiseMeitner?
A.ShewasawardedtheNobelPrize.
B.Shemadeabigmistakeinherwork.
C.Shedidlotsofstudiesaboutnervegrowth.
D.Shemadegreatcontributionstonuclearphysics.
B
Knowingmoreaboutsciencethantheaveragemiddlestudent,CarolineCrouchley,13,ofGardenCityisafinalistinthe20193MYoungScientistChallenge.Theannualcompetitiontasksstudentsingradesfifthtoeighthwithmakingavideotracingauniquesolutiontoaneverydayproblem.Crouchleyisoneof10finalistschosenoutofthousandsofstudentsthisyear.
Afterwatchingherbrotherenterthecompetitionseveralyearsago,Crouchley,whohasalwayslovedscience,couldntwaitforherturn.InMay,shesubmittedatwo-minutevideoaboutherideatotheorganizertocreategrowingmethodsofpublictransportation.WhenshefoundoutshewasafinalistinJune,shecouldntbelieveit.
CrouchleysprojectwasinspiredbytheconstructionsheseeseverydayoutsideherwindowinGardenCity,aswellastheLongIslandRailroadsrecentexpansion.Shenoticedtransportationcausespollutioninhercommunity,andshewasdeterminedtofindawaytostopit.
“Maybeoneday,wecanhavebettertechnologyandfindawaytohelptheenvironment,”Crouchleysaid.Inhervideo,Crouchleyexplainsthattheuseoffossilfuelsletoutbypublictransportationisamajorcauseofenvironmentalproblems.Shebelievestechnologythatreducestheneedforadiesel(柴油)engineoranelectricmotoristhesolution.Toshowherideainaction,shedesignedanewtypeoftrain.
CrouchleycreatedacomputerizedsystemdesignmodelforhertrainusinganengineeringprogramcalledAutodeskInventor.Shebroughtthetraintolifeusinga3Dprinter,magnets(磁铁)andasolar-poweredaircompressor(压缩机).Crouchleysaidittookalongtimetodevelopherideasandmakethevideo.Shehadtoworkunderdeadlines,too,whichshesaidwasstressful.
4.Whatsthecompetitionabout?
A.Solvingdailyproblems.
B.Knowingaboutscience.
C.Meetingpersonalcuriosity.
D.Answeringthequestiononscience.
5.Whichcanreplacetheunderlinedword“tracing”inparagraph1?
A.arrestingB.overcoming
C.describingD.accumulating
6.WhatsthepurposeofCrouchleysproject?
A.Tohelpprotecttheenvironment.
B.Toinventanewkindoftransportation.
C.Toinspireteenagerstostrugglefortheirdreams.
D.Tofindasolutiontoavoidusingtransportation.
7.WhichofthefollowingbestdescribesCrouchley?
A.Energetic.B.Creative.C.Humorous.D.Demanding.
C
Youmighteasilygainaccesstofreshfruitandvegetables,butthisisntthecaseinsomepartsofAmerica.TheU.S.hasmanyareasthatareconsideredasfooddeserts,whicharedefinedaspartsofthecountryshortoffreshfruit,vegetablesandotherhealthyfood,usuallyfoundinpoorareas.
Fooddesertsareurbanareaswherethenearestgrocerystoreismorethan1mileaway,andruralareaswherethenearestgrocerystoreismorethan10milesaway.AccordingtotheUSDA,19millionAmericans—or6.2%ofthepopulation—liveinplacesthatcanbeconsideredasfooddeserts.
Theissueisntnecessarilyaboutthedifferenceincostbetweenhealthyandunhealthyfoodsintheseareasbutitsaboutalackofaccesstohealthychoicesatall.And,withthelackofhealthyfoodchoices,theseareastypicallyhavealargesupplyofunhealthyfoodssoldatfast-foodcompaniesandconveniencestores.
Eatingunhealthyfoodscanleadtooverweight,whichputspeopleatriskforallkindsofmajorhealthissues,includinghighbloodpressure,heartdisease,andsomecancers.
Butsomepeople,especiallythosewhocannotaffordacar,arestuckwitheatingwhatsreadilyavailable.Inthecaseoffooddeserts,itsusuallythetypeoffoodthatcanleadtooverweight.Studieshaveshownthatthisislikelytobeaprobleminlow-incomeareas.Whenmoneyisnotenough,peopletendtobuyfoodsthatlastlongerandremovefoodwaste,whichisawasteoftheirlimitedincome.
Lackofaccessisonlyonepartoftheproblem,however.Astudypublishedin2018foundthatfoodinequalitywasntremoved.Thebiggerissuewaslikelythelackofeducationandnutritionalknowledgeinthesecommunities,whichpreventspeoplewithlowerincomesfromunderstandingthebenefitsofhealthyeating.
Whileoverweightisasignificantissueinthesecommunities,thecostofunhealthyeatingisntjustphysical.Astudyfoundthat71billiondollarsinhealthcarecostsduetochronicdiseasescouldbesavedthroughhealthiereating.
8.Whatcanweinferfromthefirsttwoparagraphs?
A.6.2%oftheAmericansliveinpoorareas.
B.SomepartsoftheUSAlackfreshvegetables.
C.SomepeopleinAmericadontneedfreshfruit.
D.Peopleinthefooddesertsbuyfreshvegetableseasily.
9.Whycanfast-foodcompaniesselllargeamountsofunhealthyfoodinthefooddeserts?
A.Theseareasarerichinunhealthyfoodmaterials.
B.Fast-foodcompanieswanttomakealargerprofit.
C.Healthyfoodchoicesareunavailableintheseareas.
D.Peopleintheseareaspreferunhealthyfoodtohealthyfood.
10.Whatdostudiessayaboutpeopleinlow-incomeareas?
A.Theyarelesslikelytohaveoverweightproblems.
B.Theyaredelightedtopreparefoodforthemselves.
C.Theyhavetobuyfoodthatcanbepreservedlonger.
D.Theyareusedtoeatingfooddonatedbyfoodcompanies.
11.Whatstopspeoplefromunderstandinghealthyeatingbenefitsinthefooddeserts?
A.Lackofgovernmentfinancialsupport.
B.Lackofknowledgeofdiseaseprevention.
C.Lackofsocialpromotionofhealthyeating.
D.Lackofeducationandknowledgeinnutrition.
D
Rescuingvictimsfromaburningbuilding,achemicalspill,oranydisasterthatisinaccessibletohumanresponderscouldonedaybeataskforadaptablerobots.Imagine,forinstance,rescue-robotsrisingupontwolegscanboundthroughrubble(碎石),pushasideaheavyobstacle,orbreakthroughalockeddoor.
Engineersareimprovingthedesignoffour-leggedrobotsandtheirabilitytorun,jumpandevendobackleaps.Butgettingtwo-legged,human-likerobotstouseforceorpushagainstsomethingwithoutfallinghasbeenalionintheway.
NowengineersatMITandtheUniversityofIllinoisatUrbana-Champaignhavedevelopedamethodtocontrolbalanceinatwo-legged,tele-operatedrobot—anessentialsteptowardenablingahuman-liketocarryouthigh-impacttasksinchallengingenvironments.Theteamsrobot,physicallyresemblingamachinedbodyandtwolegs,iscontrolledremotelybyahumanoperatorwearingavestthatsendsinformationaboutthehumansmotionandgroundreactionforcestotherobot.Throughthevest,thehumanoperatorcandirectandexperiencetherobotsmovements.Iftherobotisstartingtotipover,thehumanfeelsthesamepullonthevestandcanadjustinawaytorebalancebothhimselfandtherobot.
Inexperimentswiththerobottotestthisnew“balancefeedback”approach,theresearcherswereabletoremotelymaintaintherobotsbalanceasitjumpedandwalkedinsync(同步)withitshumanoperator.
“Itslikerunningwithaheavybackpack—youcanfeelhowthedynamics(力)ofthebackpackmovearoundyou,andyoucanmakeupproperly,”saysJoaoRamos,whodevelopedtheapproachasanMITPostdoctor.“Nowifyouwanttoopenaheavydoor,thehumancancommandtherobottothrowitsbodyatthedoorandpushitopen,withoutlosingbalance.”
12.Whatsthefunctionofthefirstparagraph?
A.Advertiseanewrobot.
B.Showtheappearanceoftherobot.
C.Telltheprincipleofthetwo-leggedrobot.
D.Introducethepurposeofthetwo-leggedrobot.
13.Whatisthetroublewithhuman-likerobots?
A.Itshardforthemtodobackleaps.
B.Itshard
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