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陆良县2023-2024春季学期高二期末考试(605B)物理试卷答案试卷答案

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28.Whatdofarmersdowithimperfectfruitsandvegetablestraditionally?A.Throwthemaway.B.Turnthemintofertilizer.C.Donatethemtocharity.D.Storethemforthewinter.29.WhatisthepurposeofImperfectProduce?A.Tomakebetterprofits.B.Tosellimperfectproduce.C.Togetdiscountsfromfarmers.D.TocompetewithWholeFoods.30.WhatcanweleamaboutEuropecomparedwiththeUS?A.Ithasmoresuccessfully-runfoodchains.B.Itproduceslessmisshapenfruitsandvegetables.C.Itaddressestheproblemofmisshapenproduceearlier.D.Itfacesamoreseriousproblemofunfavorableweather31.Accordingtothelastparagraph,whyiswastedfoodharmfultotheenvironment?A.Itpollutesthefarms.B.Itgivesoutabadsmell.C.Itcontributestoglobalwarming.D.Itproduceslotsofcarbondioxide.DYoudon'tneedtobeanexperttorecognizelunamoths().Theyhavehairywhitebodies,redlegsandhugegreenwingsthatstretchupto4.5inchesacross.Andattheendoftheirwingsareapairoflongtailsthathaveattractedscientistsforcenturies.Someofthemtheorizedthatitwaspossiblethatfemalemothsjudgedthehealthandqualityofamalebythesizeofhistails.Butittumnedoutthatfemalemothswerenotchoosyatall.Theyjustmatewiththefirstmalestheycouldfind.Othersbelievedthatthetailscouldincreaselunamoths'sizetomakethemharderforthebats-themainenemyoflunamoths-tohandle.Butthetheoryprovedwrongin1903whenascientistnamedArchibaldWeeksputbatsagainstabiggerspeciesofmothsthatlackedtails.Hefoundthatthebatskilled66%oftheirtargets.Lunamoths,despitebeingsmaller,werehardertocatch."Clearly,theirtailsprovidedananti-batadvantage,"Weeksobserved."Ithinktheywereusedtodirectbatsawayfromthemoths'body.Hewasroughlyright.Morethanacenturylater,JesseBarberfromBoiseStateUniversityputlunamothsagainstbatsinadarkroomandfilmedthehunting.Undernormalcircumstances,thebatsonlymanagedtocatch35%ofthelunamoths.ButifBarbercutofftheirtailsbeforehand,thebatscaught81%ofthem.Thatwasnotbecausethemothsbecameworsefliers-infact,cuttingthetroublesometailsseemedtohaveimprovedtheirflyingabilities.Barberexplainedthatbatswerenotvisualhunters.Theyfoundtheirfoodwithaspecialsound.Tobeprotectedfrombats,lunamothsneededsomethingthatmadeconfusingsounds.Thatwaswhatthelunamoths'tailsdid:Astheyflew,theywavedbehindthemandproducedsoundsthatweresimilartotheirwingbeats.Tobats,theyeithersoundedlikeahugepartoftheirtarget,orlikeanentirelydifferenttarget.Asaresult,theyaimedabouthalftheirattacksatthetails.32.WhatisArchibaldWeeks'importantcontribution?A.Hefoundthatbatsarethemainenemyoflunamoths.B.Hetheorizedthatlunamothsusetheirtailstoconfusebats.C.Heprovedthatlunamoths'sizeisimportantfortheirsurvival.D.Heobservedthatfemalemothsprefermalemothswithlongertails.英语第5页（共8页）

陆良县2023-2024春季学期高二期末考试(605B)物理试卷答案第一部分

x>00的的空间内存在沿y轴负方向的匀强电场,14.(12分)在如图所示的直角坐标系xOy中,x>LL的空间内同时存在垂直xOy平面向里的匀强磁场,磁感应磁场,磁感应强度大小为B。一电一电荷量v0、=45^+q(q>0),、质量为m的粒子从y轴的A点以大小为v方向与y轴正方向成θ=45°角的初速度进入电场,之后粒子从x轴上的C点沿x轴正方向进人动轨迹在x动轨迹在x轴上方。已知C、O两点间的距离为L,粒子所(1)A、O(1)A、O两点间的距离及电场强度E的大小;x>L(2)粒子在x>L的空间运动过程中,离x轴最远的距离ym。xym。

陆良县2023-2024春季学期高二期末考试(605B)物理试卷答案第二部分（待更新）

3..如图所示为电路上常用的熔断保险丝,当电路中有较强电流通过时,保险丝会快速熔断及时切断电源,保障用电设备和人身安全有一段电阻为R熔断电流为4A的保险丝,若将这段保险丝对折后绞成一根,则保险丝的电阻和熔断电将变为A.14RR和2AB.14R和8C.12R和D12R和8A保险丝熔断电流