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河北省2024年九年级4月模拟(二)物理试卷答案试卷答案

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高一同步周测卷/英语Betelgeusebecamegraduallydark.Atthetime,astronomersweren'tsureifthisstarwasjustgoing(十七)必修三Unit4throughaphase()Thealternativewasmoreexciting:Itmightbereadytoexplodeasasuper-(考试时间40分钟，满分100分)》nova.(Itturnedouttobejustaphase.)Thesunalsoshookthingsupwhenscientistsnoticedthatitwasn'tbehavinglikeothermiddle-agedstars.It'snotasmagneticallyactiveasotherstarsofitsageandmass.Thatsuggestsastronomersstillmightnotfullyunderstandthetimelineofmiddleage.俎、单词拼写（共10小题；每小题1分，满分10分）根据空格前首字母或空格后括号内的汉语提示写出单词的正确形式

Usingphysicsandindirectmeasurements,scientistscanmakearoughestimateofastar'sage.1.AnneissuchanigirlandshemustbeabletopasstheexameasilySomemethods,itturnsout,workbetterfordifferenttypesofstars.2.FewpeopleIknowseemtohavemuch(欲望)ortimetocook.Whydoweevencare?Galaxiesarehugecollectionsofstarsofdifferentages.Stars'agesmight3.What'smore,doinghouseworkcanbeaformof(精神的)relaxationfromstudyhelpusfigureouthowsuchgalaxiesgrowandevolveorhowplanetswithinthemform.Knowingstars咖数4.Theriverbecamenarrowandsandit'shardfortheshiptosailonthewater.agesmightevenassistinthesearchforlifeinothersolarsystems.5.Tomissoithatheneveraskshisparents'opinionunlesshewantstheirsupport.1.Whatmayscientistswanttoresearchaboutstarsmostnow?6.Just9%ofglobalplasticwasteis(回收利用)A.Theircompanions.B.Theirtypes.O7.Theboy'smoneywas（足够的)tobuyabirthdaygiftforhismother.C.Theirages.D.Theircharacteristics.如8.Hehasadreamofbeinganaandwalkinginthespace.2.Whatdoestheunderlinedword"cracked"inParagraph2probablymean?早9.He(confidenceandasaresult,hefailedinthecontest.A.Discussed.B.Described.C.Touched.D.Solved邮10.Theworkerswerenotbetterorganized,otheywouldhavefinishedthetaskinhalfthe3.Whyistheexamplein2019mentioned?time.A.ToshowscientistsstillhavepuzzlesaboutstarsO二、短语填空（共5小题；每小题2分，满分10分）B.Toprovescientistshavestudiedstarstothefull.根据句意选择正确的短语填空，注意使用正确形式

每个短语限用一次C.Toprovidefactsforscientists'researchesonstars螺asaresult,carryon,figureout,resultin,runoutD.TowarnscientiststonoticesomesurprisingstarsK1.Themoneybegantoandtheycouldn'taffordthelessonsanymore.4.Whatdoestheauthorwanttotellusinthelastparagraph?2.Aftermybestpartnerleft,Ijusttriedto蜜asnormal.A.Thereasonsforcaringaboutthespace.3.Positivethinkingandactioncansuccess.B.Thebenefitsoffiguringoutsolarsystems.4.Peoplehavebetteraccesstohealthcarethantheyusedto,andthey'relivinglongerC.Thewaysofmeasuringastar'sage.杯D.Thesignificanceofresearchingstars'ages.5.Itisdifficulttoaglobalpopulationofpolarbearsbecausemuchoftherange四、七选五（共5小题；每小题4分，满分20分）hasbeenpoorlystudied.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原三、阅读（共4小题；每小题5分，满分20分）选项

阅读下面短文，从每题所给的A、B、C、D四个选项中选出最佳选项

TheNorthStar,alsoknownasPolaris,isoftenusedbycamperstohelpthemfindtheirwayScientistsknowquitealotaboutstars.Aftercenturiesofpointingtelescopesatthenightsky,as-whentheygetlost.1YoucanusethemtofindtheNorthStarandhelpyouifyouloseyourdi-tronomersandamateursalikecanfigureoutkeytraits(ofanystar,suchasitsmassoritscom-rection,orjustfindtheNorthStarforfunifyou'reintostargazing.position2YoucanusetheBigDipper(北斗七星)tofindtheLittleDipper..TheLittleDipperisTocalculateastar'smass,justlookatthetimeittakestomovearoundacompanionstar.Thentheconstellation(thatcontainstheNorthStar.ThetipoftheLittleDipper'shandleisthedoabitofcalculation.Todeterminewhatit'smadeof,looktothespectrum()oflightthestarNorthStar.Ifyou'reabletolocatetheLittleDipper,youcaneasilyspottheNorthStar.救sendsout.Butonequestionscientistshaven'tquitecrackedyetishowtocalculatetheexacttimeofLocatetheNorthStarwithyoursmartphone.Therearemanysmartphoneapplicationsthatwork地astar.somethinglikeatelescope.Youallowthephonetofindyourlocation,andthenpointyourphoneto"Thesunistheonlystarwhoseageweknow."saysastronomerDavidSoderblom.Heworksatthesky.Thephoneactsasaninteractivemap,identifyingstarsandconstellationsforyou.3theSpaceTelescopeScienceInstituteinBaltimore,Md."WeusewhatweknowaboutitandhowitBuyastaratlas().Iftheideaofcarryingyourphonearoundwhilestargazingkillsthefuncompareswithothers,"hesays,"tofigureouttheageofotherstars.foryou,considerbuyingastaratlasinstead.Youshouldalsoalwaystakeanatlaswithyouwhenhi-Evenwell-studied,starssurprisescientistseverynowandthen.In2019,theredsupergiantkingincaseyourphonebatterydies.4Astaratlasisabookthatbreaksdownthenightskyby英语（人教版）第1页（共4页）衡水金卷·先享题·高一同步周测卷十七英语（人教版）第2页（共4页）新教材

河北省2024年九年级4月模拟(二)物理试卷答案第一部分

9.(6分)某同学用如图甲所示装置验证动量守恒定律.已知人射小球质量为m1,被碰小球质量为m2..记录小球抛出点在地面上的垂直投影点0.C.斜槽可以不光滑D.斜槽末端必须水平

河北省2024年九年级4月模拟(二)物理试卷答案第二部分（待更新）

3.游客乘坐观光电梯到观光平台,若电梯简化成只受重力与绳索拉力,已知电梯在t=0时由静止开始上升,以向上为正方向a-t关系如图所示。则下列说法正确的是()A.t=9s时,电梯处于失重状态B.10s~50s时间内,绳索拉力最小C.t=59s时,电梯处于超重状态D.t=60s时,电梯速度恰好为零