[今日更新]安徽省2024年中考密卷·先享模拟卷（三）.物理试卷答案

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[今日更新]安徽省2024年中考密卷·先享模拟卷（三）.物理试卷答案试卷答案

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26.Whathelpedtheauthorknowmoreabouthisgrandfather'sexperiencesonthebattlefields?A.TheillustrationbyMuirheadBone.B.Thearmyrecordsofhisgrandfather.C.HisvisittotheImperialWarMuseum.D.ThelegendoftheBattleoftheSomme.27.Whydoestheauthorwritethetext?A.Totellaboutpeople'slifeinthe1910s.B.TohelpusknowabouttheFirstWorldWar.C.Toencourageustoknowaboutourgrandfathers.D.Totellabouthisgrandfather'sexperiencesatwar.CParentsdonotowetheirchildrenacollegeeducation.Iftheycanaffordit,theycancertainlysendthemtoagooduniversity.Buttheyneedn'tfeelguiltyiftheycan't.Whenchildrengrowupandwanttogetmarried,theirparentsdonotowethemanapartment.Theydonothavethedutytolookaftertheirgrandchildren,either.Iftheywanttodoit,itmustbeconsideredafavor,notanobligation.Doparentsowetheirchildrenanything?Yes,theyowethemagreatdeal.Oneoftheirobligationsistogivetheirchildrenapersonalworth.Childrenwhoarealwaysmadetofeelstupidandunworthy,constantlycomparedwithbrighterbrothers,sisters,orcousinswillbecomesounsure,soafraidoffailingthattheywon'ttryatall.Ofcoursetheyshouldbeproperlycorrectedwhentheydowrong,butit'softenbettertoletchildrenlearntheirmistakesbythemselvesintime.Alltheirparentsshoulddoistotrustthem,respectthem,understandthemandgivethemchancestotryandfail.Theymustlearntostandfailure.Whencriticisms()arereallyneeded,theyshouldbebalancedwithasmileandakiss.Thatisthewaychildrenlearn.Parentsowetheirchildrenasetofsolidvaluesaroundwhichtobuildtheirlives.Thismeansteachingthemtorespecttherightsandopinionsofothers;itmeansbeingrespectfultoelders,toteachers,andtothelaw.Thebestwaytoteachsuchvaluesisbydeeds.Achildwhoisliedtowilllie.AchildwhoseesnolaughterandnoloveinthehomewillhavedifficultylaughingandlovingNochildaskstobeborn.Ifyoubringalifeintotheworld,youowethechildsomething.28.TheauthorthinksparentsA.shouldsendtheirchildrentocollegeB.shouldsupporttheirchildrenaftertheygetmarriedC.needtobuyanapartmentfortheirchildrenD.needn'tfeelguiltyiftheycan'tsendtheirchildrentouniversities29.Whatdotheunderlinedwords"anobligation"inParagraph1mean?A.Aright.B.ApromiseC.Aduty.D.Anexcuse.英语试题（长那版）第5页（共10页）

13.(12分)风洞训练可以模拟高空跳伞下落过程中人体所承受气流的状态,是跳伞初学者学习跳伞的必要项目。在空中运动的物体受到的空气阻力F=12CdSv^2(式中S为迎风面积,Cd为风阻系数),与物体的迎风面积、光滑程度和整体形状等有关。已知某跳伞运动员的质量M=65kg,空气密度ρ1.29kg/m^3,重力加速度g取10m/s^2。,(结果保留两位有效数字)(1)如图甲,风洞竖直向上送风,当该运动员身体的迎风面和S=0.63m^2Cd动员悬浮在风洞内,C.取0.326,求此时风洞内的风速v的大小。时,该运vCd(2)在室外高空跳伞时,C取1.26,跳伞装备的总质量m=20kg,打开的降落伞和m=2

的原理简化图,辘轳绕绳轮轴半径x=0.1m,水的质量为0.5kg,井足够深且绳的质量及浮r=0.1m,的影响可忽略不计,某次从井中汲取赤=2kg的水,=0时刻,轮轴由m=2kgt=0时刻,轮轴由静止开始绕中心轴转动向上提水斗,其角速度随时间变化规律如图丙所示,g取10m/s^2,,则A.水斗速度随时间变化规律为v=2t(所涉及物理量均用国际单位制)B.井绳拉力大小恒定,其值为25NC.0∼10s内水斗上升的高度为4m量词D.0~10s内井绳拉力所做的功为255J

5.场离子显微镜技术是能够在某些金属表面上观察到单个原子的一种方法。其装置如图所示,球形玻璃泡的内壁涂有一层荧光材料制成的导电膜,针尖为被研究结构的样品,针尖的半径只有10nm,处在玻璃泡的球心。运用真空泵把玻璃泡内抽成接近真空的状态,在金属针尖上加高电压,使针尖为负极,针尖上原子中的电子要克服金属表面的逸出功W被强电场剥夺,离开针尖的电子在电场力作用下向荧光质涂层移动,在涂层上产生的光斑便是针尖上原子分布的反映。按到班空已知电子质量为m,,带电荷量为e1,,单位时间内有n个电子打到涂层上,打到涂层上后速率立即变为零。则电子A.从球心向荧光质涂层运动过程中做匀加速运动B.到达荧光质涂层时的速率为C.在运动过程中电势能和动能都变大D.打到荧光质涂层上时对涂层的作用力近似为F=n2(eU-W)m