[今日更新]安徽省2023-2024学年度八年级阶段考试.物理试卷答案

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[今日更新]安徽省2023-2024学年度八年级阶段考试.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）

(3)完成上述实验后,另有同学设计了如图丙所示的电路,测出了额定电流为I的小灯泡的额定功率.电源电压不变,滑动变阻器R1的最大阻值为,实验方案如下03258.33①按电路图连接电路.8.34R=Z2②只闭合开关S1,移动R1的滑片,使电流表的示数为I,,灯泡正常发光.③只闭合开关S2,,保持R1的滑片位置不动,移动R2的滑片,使电流表的示数为I..④保持R2的滑片位置不动,将R1的滑片移到最左端,电流表的示数为I1,再将R1的滑片移到最右端,电流表的示数为I2.⑤小灯泡额定功率的表达式为P=[5(用I、、I1、I2、R表示).

(1)为了电路安全及便于操作,定值电阻应该选(填“R1”或“R2''),,滑动变阻器应该选(填“R3”或“R4^n)

5.第五代移动通信技术简称5G,其具备信息传输速率高、延迟少、耗低、容量大等特点,应用前景广阔。手机已经进入5G时代,与4G信号相比具有更高的频率。已知真空中光速c=310^8m/s,下列说法正确的是A.5G手机与固定电话的工作原理相同B.5G手机传递信息的电信号采用模拟信号