河南省2024年八年级下学期阶段一学情调研卷（B）物理试卷答案试卷答案,炎德英才答案网站目前收集并整理关于河南省2024年八年级下学期阶段一学情调研卷（B）物理试卷答案试卷答案得系列试题及其答案，更多试题答案请关注我们

河南省2024年八年级下学期阶段一学情调研卷（B）物理试卷答案试卷答案

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43.A.surpriseB.angerC.interestD.disappointment44.A.standoutB.befitC.makeupD.signup45.A.maintainB.proveC.discoverD.measure46.A.conditionalB.limitedC.flexibleD.subjective47.A.harmonyB.valueC.solutionD.survey48.A.giveupB.arrangeforC.contributetoD.dreamof49.A.morematureB.youngerC.morediligentD.cleverer50.A.noticedB.blamedC.recognizedD.doubted51.A.connectionB.competitionC.conversationD.comprehension52.A.comfortableB.curiousC.depressedD.adjustable53.A.returnedB.dismissedC.changedD.graduated54.A.opposedB.promisedC.accomplishedD.developed55.A.addressB.ageC.habitD.gender第二节(（共10小题：每小题1.5分，满分15分）阅读下面短文，在空白处填入1个适当的单词或括号内单词的正确形式

APittsburgh-basedroboticsandengineeringstartuprecentlyunveiledMoonwalkers,apairofbattery-poweredshoesthatit56(claim)canboostwalkspeedsbyup57250%.Atfirstglance,Moonwalkerslooklikeapairoffuturisticroller-skates,butthereisactuallyalotmoretothemthanthat.You're58(actual)meanttowalkwiththemthewayyouwouldregularshoesorsneakers,lettingthemotorizedwheelsputaspringinyourstep.59(power)byastate-of-the-artbrushlessDCmotor,thisingeniouscontraptionisactuallyaplatform60canbeattachedtoawidevarietyoffootweartosignificantlyincreaseyourwalkingspeeduptoareported7mph/11kph.Forcomparison,humans'average61(walk)speedrangesfrom2.5to4mph.Thesensationofwalkingwiththeworld'sfastestshoes62(compare)tothatofwalkingona'movingwalkway'in63airport.DesignedbyShiftRobotics,anoffshootofCarnegieMellonUniversity,Moonwalkersconsistofa300Wbrushlessmotorineach4.2-1b(1.9-kg)shoethatpowerseightpolyurethanewheels.ThereisalsoanAI-poweredgearboxthatincreasesordecreasesspeedaccordingtodataregardingthewearer'swalkcollectedbyaseriesofsensors.Theshoesarealsoabletodetectdownhillmovementtopreventaccidents.Butdotheworld'sfastestshoeswork61(sensor)uneventerrain,orthingslikestairs?Weallknowhowtrickythosearetomitigateinrollerskates.Well,apparentlythedesignerstookthatintoconsiderationandimplementedasimplegesturethatallowsthewearertolockthewheelssothattheycanwalkupordownstairsastheywouldinregularfootwear.第四部分写作（共两节，满分40分)第一节（满分15分）假设你是李华，你校刚来的交换生Jm热爱锻炼身体

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河南省2024年八年级下学期阶段一学情调研卷（B）物理试卷答案第一部分

(4)同学们又设计了一种测定值电阻Rx的方案,如图丙所示.电源电压未知,步骤如下:R0为另一阻值已知的定值电阻,①闭合S、S2,,断开S1,,电压表的示数为U1;②闭合,断开,电压表的示数为RxU2;Rx=③定值电阻R,的表达式为R,=(用U,、U、R,表示)四、综合题(本大题共2小题,计16分)U1、U2、R0

河南省2024年八年级下学期阶段一学情调研卷（B）物理试卷答案第二部分（待更新）

9.某同学采用图甲所示的实验装置研究光的干涉与衍射现象,狭缝S1、S2的宽度可调,狭缝到屏的距离为L。同一单色光垂直照射狭缝,实验中分别在屏上得到了图乙、图丙所示图样下列描述正确的是乙丙A.图乙是光的衍射图样,说明当光通过狭缝时发生了衍射B.遮住一条狭缝,另一条狭缝宽度增大,其他条件不变,图丙中亮条纹宽度增大C.照射两条狭缝时,增加L,其他条件不变,图乙中相邻暗条纹的中心间距增大D.照射两条狭缝时,若光从狭缝S1、S2到屏上P点的路程差为半波长的奇数倍,P点一定是暗条纹