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26.Whatdoestheauthorthinkofhispaininlifenow?C.TheincreaseofhumanpopulatiA.Itisconfusing.B.Itisvaluable.D.ThedisappearanceofbreedingC.Itisuncommon.D.Itisunimaginable.29.Whydidthescetisseupameras?27.Whatdoestheauthorwanttotellus?A.Tostopillegalhunting.A.Weshouldn'trememberthepast.BTowatchpelicans'homesB.Noonecanmakeupformistakes.C.Topredictseriousflooding.15C.Noonewantstogobackandliveonceagain.D.Torecordthenumberofpelicans.D.Weshouldn'tregretthepastbutshouldmoveon.30.Whatdoestheunderlinedword"inhabit"iparagraph4mea?C(Liveon.B.Focuson.C.Breakinto.D.Lookinto.AsseabirdbiologistBonnieSlatonslidesoffasmallboatandwalksthroughhighwater31.Howdoestheauthorfeelaboutthepelicansfuture?上

thebpelicansspreadtheirwingsoverheaduntilshereachesRaccoonIsland.TheA.Unconcerned.、B.Doubtful.sC.CuriousD.Proud.案标islandisasmallpieceoflandseparatingtheAmericanstateofLouisianafromtheGulf/D将答案ofMexico.Duringtheseabirdbreeding(season,theplace,oneofthefewremainingTechnologyhaschangedalmosteverywayofourlife,andnowitseemstobethetimetoplacesofsafetyforthepelicans,isfullofnoise.updateeducationsystemsaroundtheworld.ChildrenandyoungadultsmakeuponethirdofTwelveyearsago,therewere15low-lyingislandswithbreedingareasforLouisiana'stheInternetusers,soit'snosurprisethattheyaremorehyper-connected(超连接的)than的statebird.However,today,onlyaboutsixislandsinsoutheasternLouisianahavebrownpeli-theirparents.Inasurveyof1,400educators,mostofthembelievethatclassroomsofthefuturewillbe项中，cannestsandtheresthavedisappearedunderwater.Slatonandotherscientistssetupcamerastoobservepelicannestsontheisland.Thecenteredonpersonalizedlearning.Thisstudent-centeredwaywillallowchildrentochoose于北京camerasshowthatinrecentyearsthepelicanshavefacedsomenaturaldisasters.Themaintheirownpace(andlearninggoalsbasedonpersonalinterests,allofwhichcanbekillerofthemisflooding,whichcanwashawayallthenests,ashappenedinApril2021.Theguidedbyartificialintelligence(AD,chattingobots(chatbots)andide-based景不会disaperingislandsarethelocationofastoryofsuccessfulconservation.Formanyyears,Alineducationspeciallyfocusesontellingwhatastudentdoesodoesnkandthenscientistshaveworkedtobringthepelicansbackfromtotallydyingoff.developspersonalizedcoursesforeachstudent.ChatbotsrqucybemkMikeCtaeildlifebiologistinLousHesaidheneversowpliinthenextgenerationeducation.Designedtosimplifythexchngeofidd经济名hidtheTheirpopulationshadbeenkilledbytheusofDDT,akindofbetweenstudentsandcomputers,chatbtsprovideoofbenefitslthoughibdficItthinedgeandpreventedpelicfromgivingbirthtoyoungbirds.leaingmyotnecesariybeconideredAIbftheThebeovbirdseremeeonefromosappearingntheeBumewitasanimportantpartofpersonalzedleamingexpenenesSamescholhreportbrnmgingfvethemedthebirds'retun.AferDDTwasstoppedinthevitchingintheircuybuevenhigherdemnvidUs.nl972.bologistsbrouehtyoungpeicansfonneartylordholethemihinenpingmaycomefromstudentsinthenearfuturedthelfofMecMrethanhavebeenTheeescomltelydiffereomheeindderdbechangeinhowefiHoee飞性的southeasternLouisianaover13years.Theivmorehayarthethatchidrnllknbookbcbrennertndtiltaketimeobecomer.Andthefurorplymorelikblievhtnmrcansisuncertainontheislands.okeepngchienerdxethoughwemynotbeintheageofonlineehers,thebenefitofehnology28.Whatisakillerofbrownpelicans?A.Theislandmovement.feachingaidaretrue.However,what'smoreimportantisthattheseaidsarehelpingkeep学村B.Theunderwaternoise.udnsherthantechnologythehearofed【高一英语第页[英10页】002ASX阶【高一英语第6页（共10页】002A的SX般目的的科学

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15.(16分)如图甲所示,在平直的公路上有一辆长为L=10m((车厢与车头的总长度)的卡车A正以v1=24m/s的速度做匀速直线运动,某时刻司机发现正前方的地面C处有一障碍物(视为质点),在反应0.5s后刹车,此后卡车以大小为a=2m/s^2的加速度做匀减速直线运动,恰好不与C处障碍物发生碰撞.(1)求司机发现障碍物时车头前沿与障碍物间的距离s;(2)如图乙所示,清理掉障碍物后,卡车以v2=30m/s的速度匀速直线行驶,某时刻有一架无人机B(可视为质点)正以v3=9m/s的速度在卡车的车头前沿正上方同向匀速直线飞行,若此时卡车立即以大小为a1=4m/s^2的加速度刹车,求从该时刻到无人机经过卡车车厢尾端正上方时所经历的时间t(计算结果保留3位有效数字);(3)在第(2)问情景下,当卡车刚减速为0的瞬间,又立即以大小为a'=1m/s^2的加速度匀加速启动,通过计算说明此后无人机能否超越卡车车头前沿?若不能,求无人机离车头前沿的最小距离d.

4.滑板运动是由冲浪运动演变而成的一种极限运动项目。如图所示,一同学在水平地面上进行滑板练习,该同学站在滑板A前端,与滑板A一起以20n/s的速度向右做匀速直线运动,在滑板A正前方有一静止的滑板B.在滑板A接近滑板B时,该同学迅速从滑板A跳上滑板B,接着又从滑板B跳回滑板A,最终两滑板恰好不相撞。已知该同学的质量为45kg,两滑板的质量均为2.5kg,不计滑板与地面间的摩擦,下列说法正确的是A.上述过程中该同学与滑板A和滑块B组成的系统水平方向上动量不守恒B.该同学跳离滑板B的过程中,滑板B的速度减小C.该同学跳回滑板A后,他和滑板A的共同速度为19tm/sD.该同学跳离滑板B的过程中,对滑板B的冲量大小为47.5N·s

15.(15分)如图为某游戏装置原理示意图。水平桌面上固定一半圆形竖直挡板,其半径为2R、内表面光滑,挡板的两端A、B在桌面边缘,B与半径为R的固定光滑圆弧轨道CDE在同一竖直平面内,过C点的轨道半径与竖直方向的夹角为60^。。一质量为m的小球P以某一水平初速度由A点切入挡板内侧,在B点与另一个质量为2m的静止小球Q发生碰撞,碰后合二为一,从B点飞出桌面后,在C点沿圆弧切线方向进入轨道CDE内侧,并恰好能到达轨道的最高点D。小球P与桌面之间的动摩擦因数为12,重力加速度大小为g,忽略空气阻力,小物块可视为质点。求:(1)小物块在A点的初速度大小;(2)若在B点P与Q发生弹性碰撞,碰后Q从B点飞出桌面后,在C点沿圆弧切线方向进入轨道CDE内侧,并恰好能到达轨道的最高点D。小球P与桌面之间的摩擦力不计,小球P由A到B所受弹力的大小及合力的冲量的大小。