河南省洛阳市2023-2024学年度第一学期八年级期末考试数学.考卷答案试卷答案,我们目前收集并整理关于河南省洛阳市2023-2024学年度第一学期八年级期末考试数学.考卷答案得系列试题及其答案，更多试题答案请关注微信公众号：考不凡/直接访问www.kaobufan.com(考不凡)
河南省洛阳市2023-2024学年度第一学期八年级期末考试数学.考卷答案试卷答案
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DScienceexperimentsdon'talwaysgoasplanned,butthatdoesn'tmeanyoucan'tlearnfromthem.Recently,Australianscientistslearnedsomethingunexpectedaboutmagpies鹊)whentheytriedtoputtrackers(跟踪仪)onthemtolearnmoreabouttheirhabits.ThebirdsthescientistshopedtostudywereAustralianmagpies.Theyareknowntobequiteclever.Theyliveingroupsofupto12birdsandworktogethertoprotecttheareatheylivein.Theresearcherswishedtotryanewtrackeronthemagpies.Theyhopedtolearnmoreabouthowfarthebirdsflyandwhattheydoduringanormalday.Thescientistsarecon-cernedthatmagpiesmayhaveahardtimeadjusting(totheenvironmentastheworldwarmsupbecauseofclimate(气候)change,.Tokeepthetrackersonthebirdswithoutcausingflyingproblems,theresearchersdevel-opedaspecialharness,bywhichtheycanfixtrackerstomagpies.Itwastough,soitwouldn'tcomeoffbyaccident.Therewasjustoneproblem-thebirdsdidn'tlikethetrackers.Theresearchersplacedtrackersonfivemagpiesusingtheirspecialharnesses.Butjusttenminutesaftersettingupthelastmagpie,theynoticedsomethingunusual:Anadultfemalemagpiewashelpinganothermagpiegetfreefromitsharness.Inafewhours,mostoftheothermagpieshadalsobeenfreedfromtheirharnesses.Bythethirdday,noneofthebirdshadtrackersanymore."Thebirdsaremuchclevererthanwethought,"saidDominiquePotvin,oneofthescientists.Thescientistsweredisappointedaboutthetrackers,buttheyrealizedthatthemagpieshadtaughtthemsomethingelse:Magpiesareableandwillingtohelpeachotherout,evenifthebirdwhoishelpinggetsnothingfromothers.Thisiscalled"rescuebehavior",andit'snotthatcommonintheanimalworld,especiallyamongbirds.Theresearchersaregladthey'velearnedabouttherescuebehaviorofmagpies.Butnowtheyneedtothinkaboutagoodwaytotrackthesecleverbirds.32.Whydidscientistsfixtrackerstomagpies?A.Toimprovethetrackers.B.Toknowofmagpies'habits.C.Totesttheuseforthetrackers.D.Tofindoutthemagpie'spopulation.33.Whatarescientistsworriedaboutinparagraph3?A.Thelittlefoodformagpies.B.Magpies'longdistanceflying.C.Thedamagecausedbyclimatechange.D.Magpieshavingtroublegettingusedtoclimatechange.【高一英语第6页（共10页）】
6.如图甲所示,斜面固定在水平地面上,可视为质点的物体从斜面底端以10m/s的速度沿斜面上滑动,到达斜面顶端时速度恰好为0,之后又滑回斜面底端。规定平行于斜面向上为正万问,物体运动的部分v-t图像如图乙所示,取重力加速度大小g=10m/s^2,,则斜面顶端距水平地面的高度为A.2mD.5m
