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陕西省2025届高三第一次校际联考试题(数学)试卷答案
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第二部分阅读理解（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
AManysummercampshavehadtocanceltheirprogrammingduetoCOVID-19.Sowehavefoundagreatselectionofvirtualsummercampsforyourchildren.HappyCamperLiveAges:5~18Cost:$499amonthWhatisspecialaboutHappyCamperLiveisthattherearehundredsofcampadventuresandexperiencestochoosefromtoofferyourchildrenuniquecampexperience.Childrencanmakefunwithaworld-classathlete,playvolleyballwithanationalhighschoolchampionandlearnanewart,craftormusicalinstrument.SmartRobotsVirtualCampAges:7~11Cost:179fortwoweeksCamperswillreceiveasmartcodingrobotofchoiceandlearningmaterialsandappstogetthemstartedinthiscamp.Thiscampisofmuchsocialexperience.Attheendofcamp,eachchildwillbecertificatedasa"juniorcoder",havemadepenfriendsforlifeandhavenewskillsandknowledgetobringintotheirclassroomsinthefall.WrittenOutLoudAges:8-17Cost:$250perweekThestorytellingschoolWrittenOutLoudhastransformeditsprogramtoavirtualstorytellingworkshop.Foundedin2018byaHollywoodfilm-maker,WrittenOutLoudoffersclassesforchildrenaged8to17thatcombinearangeofdisciplinessuchascreativewriting,film-makingandevenimprovingcomedy.GotGameSummerAcademyAges:4~12Cost:195fortwoweeksWithafocusonreading,writingandmath,GotGamewillhelpyourchildrenstayacademicallyontrackwhilestillhavingfuninanenergisedvirtuallearningenvironment.Childrenwillreceivepersonalisedattentionfromteacherswhilealsoparticipatingingamesthatcentrearoundcommunicationongroupprojectsandbuildingindividualskills.21.Wherecancampersamusethemselveswithaworld-classathlete?A.InHappyCamperLive.B.InWrittenOutLoud.C.InSmartRobotsVirtualCampD.InGotGameSummerAcademy.高三·英语第3页（共10页）
16.(13分)如图所示,水平面上有质量m等于1kg且可视为质点的物块,光滑的半圆轨道与水平轨道平滑连接于B点,半圆轨道半径为R为1m,开始时物块静止,左端有一个压缩的弹簧紧靠着竖直墙壁,物块静止位置离半圆轨道B点的距离xAB=4m,弹簧与物块不栓接,某时刻解除弹簧锁定,弹簧将物块弹开,之后恰好能到达半圆轨道的顶端C点,已知物块与水平面间的动摩擦因数1=0.5,g=10m/s^2,求:千4=x(1)弹簧所具有的弹性势能:(2)物块离开C点后落地点到B点的水平距离。4mCm=1kgmAB
