[今日更新]福建省2023~2024学年度八年级下学期期中综合评估 6L R-FJ.物理试卷答案

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[今日更新]福建省2023~2024学年度八年级下学期期中综合评估 6L R-FJ.物理试卷答案试卷答案

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1.Whatcanparentsdowiththehelpofthenewapp?A.Computerscanbeareallypositivepartofchildren'slives.A.Visitthecameraoftheirchild'spersonaldeviceB.Weoftenhearthatcomputershavechangedourlivesforthebetter.分B.UsefreeWi-Fiandmobiledataanytime,anywhereC.Weshouldhavearightattitudetowardsthecomputers.C.Fightendlessbattlesaroundtheuseofpersonaldevices.D.Otherproblemsarepsychological.D.Preventtheirchildusingsomeappsontheirpersonaldevice.E.Thismeanstheycan'tworkorstudyproperlyandcanhaveproblemskeepingfriends.2.Whatkindofattitudemayparentstaketothenewapp?F.Theyfindthattheireyesightgetsworse,forexample,iftheylookatthesereenfortoolong.高A.Negative.B.Supportive.C.Doubtful.D.Concerned.G.Manypeoplehavebeenaddictedtocomputergames3.Whichwordcanbeusedtodescribetheappaccordingtothelastparagraph?班级姓名分数A.Affordable.B.Safe.C.Time-wasting.D.Convenient.完形填1234567891011121314154.Whatisthepurposeofwritingthetext?答案努A.Tocallonparentstomonitortheirchildren.B.Toadvertiseapersonaldevicetocustomers.阅读234劳OC.Tointroduceanewmonitoringapptoparents.答案D.Toattractreaders'attentiontoacommonissue五、七选五（共5小题；每小题4分，满分20分）七选五125些阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项

选项中有两项为多余答案选项

烯Thousandsofpeoplenowusecomputersformanydifferentthings.1Buthavethey?六、语法填空（共10小题；每小题1分，满分10分）Ofcoursecomputersaregreatbecausetheyhaveimprovedsomepeople'slivesforthebetter.阅读下面短文，在空白处填人1个适当的单词或括号内单词的正确形式

SHowever,theycauseproblems,too.Alargenumberofpeoplewhousecomputersalotcangetphysi-Anappisatypeofsoftwarethatcanberunonacomputer,asmartphoneorotherdevices.App举calproblems.2Therewillbeinjuriesincomputerusers'handsandarms,astheyusethekey-isshort1thewordapplication.Mostappshaveaspecificfunction.Forexample,afooddeliveryboardandthemousetoomuch.Peoplewhohavecomputersarealsospendingmoretimesittingandappmightonly2(design)foruserstogetfoodfromlocalrestaurants.ThereareafewdifferentOlesstimeexercising;somanyofthemarebecomingoverweight.typesofapps.Aweb-basedappisonethatrequiresInternetforuse.Itneeds3muchsmaller3Oneexampleisstress.Computers,theInternetande-mailshavemademanypeople'samountofmemoryspacebecausethedatabasesarestoredontheInternet.4(example)ofweb-livesmuchfaster.Thiscanbeveryexciting,butitalsomeansthatpeoplefeelunderalotofpressurebasedappsincludeNetflix,GoogleDocsandDropbox.少todoeverythingmorequickly,whichisstressful.Apps5arecreatedforacertainmobileplatformareknownasnativeapps.Forexample,anappforanAppleiPhonewillonlybeusedonAppledevices.6(obvious),thesetypesofappsOAddictionisalsoaproblemwithmoreyoungpeople.TheycanspendhoursandhoursinchatroomsandsurfingtheInternet,evenuntilverylateatnight.4SomestudiesintheUnitedStatesarecapableof7(provide)thehighestperformanceonaparticularmobileoperatingsystem.havesuggestedthatyoungchildrenandteenagerswhospendmanyhoursoncomputerstendtobecomeAhybridappismadetosupportbothnativeandweb-basedtechnologies,andit'sacombination烯lonelyandevendepressed.ofweb-basedandnativeapps.Itiseasierandquicker8(create)theseappsandtheyonlyuse"5Butparentsandteachersneedtohelpchildrentolearntousetheminresponsibleandasinglecodebasewhichcanbeintegratedacross9(variety)platforms.However,it'simpor-creativeways,"saysteacherJaneShields."Andchildrenshouldalsolearnwhenitistimetologofftanttonotethathybridappsoftenhavea10(low)performancethannativeandweb-based才thecomputersandheadoutsidetodosomethingdifferent."2apps.英语（北师大版）第3页（共4页）衡水金卷·先享题·高一同步周测卷十英语（北师大版）第4页（共4页）新教材

14.(14分)如图甲所示,MN与PQ是间距L=1m的两平行金属导轨,导轨水平部分长度l=1.2m,倾斜部分足够长,与水平面间的夹角=37^,,导轨水平部分左端连接阻值R=0.8Ω的定值电阻,水平部分处在方向竖直向上的均匀磁场中,磁感应强度大小,B1随时间t变化的规律如图乙所示,倾斜部分(含顶端)处于垂直导轨平面向上、磁感应强度大小为B=1T的匀强磁场中。1=0时刻将一质量m=0.6kg,、阻值r=0.2Ω、长度为L的金属棒静置在倾斜部分顶端,开始时金属棒恰好不滑上水平导轨。已知金属棒与导轨间的动摩擦因数处处相同,设最大静摩擦力等于滑动摩擦力,t=3.25s时金属棒可视为做匀速运动、重力加速度;g=10m/s^2,37^=0.6。。求:(1)金属棒与导轨间的动摩擦因数(2)金属棒从开始运动到t=3.25s时金属棒在倾斜导轨上运动的距离;(3)0~3.25s内通过定值电阻R的电荷量。

(3)该同学又利用(1)中的数据建立如图丙所示的坐标系并绘制图像,由该图像可知该电源的电动势E=V,内阻r=(结果均保留2位有效数字);内阻r的测量值与真实值相比将(填“偏大”“偏小”或“不变”)。

8.如图所示,两斜面体M、N完全相同,两物体P、Q也完全相同。用一根不可伸长的轻质细线通过两光滑的定滑轮将P、Q两物体连接,细线与两侧斜面均保持平行,M、N、P、Q均处于静止状态,且物体P恰好不上滑。已知α<β,,下列说法中正确的是A.物体Q受到沿斜面向下的摩擦力B.物体Q受到的摩擦力可能为零C.地面对M的摩擦力方向水平向左D.地面对M的摩擦力与地面对N的摩擦力大小相等