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2024届龙东十校高三4月联考物理试卷答案试卷答案

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offices.Theyarelessinterestedinworkinginsmallrestaurants.TheCOVID-19healthcrisisalsohurtsales,preventingforeignvisitorsandlocalsfromeatingout28.Whatdoweknowabouthawkersfromparagraph2?A.TheyareSingaporenatives.B.Theyarefamouschefs.C.Theysellgoodsintheopen-airarea.D.Theyarepopularallovertheworld.29.WhyishawkercultureaddedtoUNESCO'slist?A.ForitsimportanceinshowingSingapore'sculture.B.FortheeffortsSingaporehasmade.C.ForthereportSingaporeprovided.D.FortherecommendationbyUNESCO.30.WhyisthefilmCrazyRichAsiansmentioned?A.Toshowthepopularityofhawkercenters.B.Totelltheexperienceofthestars.C.Tointroducethesettingofthefilm.D.TohelpthesellersreceiveMichelinstars.31.Whatisthelastparagraphmainlyabout?A.Theaverageageofhawkers.B.Thedifficultieshawkercultureisfacing.C.TheeffectcausedbyCOVID-19.D.Thefutureofthehawkerculture.DThesunissetting,brighteningyourkids'facesastheyplayinthewaves.Youreachforyourphoneforthisperfectmoment.Butbeforeyoudo,here'sabitofsurprisingscience:Takingphotosisnottheperfectwaytokeepmemoryasyouthink.Takingtoomanypicturescouldactuallyharmthebrain'sabilitytokeepmemories,saysElizabethLoftus,apsychologyprofessorattheUniversityofCalifornia.So,wegetthephotobutkindoflosethememory.Photography"outsources"memories.Itworksintwoways:Weeithershakeofftheresponsibilityofrememberingmomentswhentakingpictures,orwe'resodistracted()bytheprocessthatwemissthemomentaltogether.Thefirstexplanationisthelossofmemory.Peopleknowthattheircameraisrecordingthatmoment,sotheydon'ttrytoremember.Theotherisdistraction.We'redistractedbytheprocessoftakingaphoto-howweholdourphone,composingthephoto,suchassmilingfaces,thebackgroundtoourlikingandclearimage,allofwhichusesupourattentionthatcouldotherwisehelpusmemorize.However,takingphotoscanhelpmemorywhendonemindfully.Whiletakingaphotomaybedistracting,theactofpreparationbyfocusingonvisualdetailsaroundhastheopposite.Whenpeopletakethetimetotakeclearpictures,memoriesbecomestrengthened.Anotheradvantageisthatwerecallmomentsmoreexactlywiththephotos.Memoryhasbeenreshapedwiththehelpofnewinformationandnewexperiences.Thus,photosorvideoshelpusrecallmomentsasiftheyreallyhappened.Memoriesdieawaywithoutavisualrecordbackingthemup.Therefore,aphotoisanexcellenttooltohelprememberwhendonepurposefully,whichisworthexploringfurther.32.Whatisthepurposeofthefirstparagraph?A.Topresentthetopic.B.Toshowthebackground.C.Toprovideanexample.D.Tomakeanargument.33.Whydoesphotography"outsource"memories?A.Takingphotosishelpfulforustomemorize.B.Photosaremoredetailedthanmemories.C.Manysourcesinfluencepeople'smemoriesduringphoto-taking.D.Peopledependmoreonphotostorememberthantheirbrains.高一英语学科试题第5页共8页

2024届龙东十校高三4月联考物理试卷答案第一部分

(4)钢球由静止释放到经过光电门的过程中,钢球动能的增加量Ek=,重力势能的减少量Ep=。(用题中所给物理量的符号表示L=1m如图所示,宽度L=1m的足够长的光滑平行金属导轨固定在绝缘水平面上,导轨电阻忽略不计,导轨左端与R=0.5Ω的定值电阻相连,整个导轨处在磁感应强度大小B=2T、方向垂直于导轨平面竖直向下的匀强磁场中。长为L=1m、阻值R0=0.5的导体棒ac垂直导轨放置,且始终与导轨接触良好,现用水平外力F甲拉着导体棒ac以v=8m/s的速度水平向右匀速滑动,求:(1)回路中感应电流的大小;(2)导体棒ac匀速运动2s的时间内,受到水平外力F的冲量。>x

2024届龙东十校高三4月联考物理试卷答案第二部分（待更新）

(3))如图乙所示,若实验过程中遗漏了记录平抛轨迹的起始点,也可按下述方法处理数据:在轨迹上取A、B、C三点,A、B间和B、C间的水平间距相等且均为x,测得A、B间和B、C间的竖直间距分别是y1和y2,可求得钢球平抛的初速度大小为,B点距离抛出点的高度差为。(已知当地重力加速度为,结果均用y1、y2、x表示)