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安徽省2024届九年级期中综合评估2L R数学.考卷答案试卷答案
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选择性必修三Unit1综合检测题参考答案及部分解析参考答案1-5CBACA6-10ABCAC11-15BACBA16-20ABCCB21-25DBACB26-30DCBBD31-35ABABA36-40DAFCG41-45BACBD46-50ACDBD51-55CABDA56.are57.the58.wasestablished59.opening60.provinces61.original62.itself63.which64.of65.locally写作第一节Onepossibleversion:DearAmy,Alocaltravelagencyislookingforapart-timeEnglish-speakingtourguide,andI'mwritingtosharesomedetailsaboutitincaseyoumaybeinterested.Itsmainresponsibilitiesincludeaccompanyingforeignvisitors,bothindividualsandgroups,tolocaltouristattractions,andgivinginsightsthatcanhelpthemmakethemostoftheexperience.Asmentionedintheadvertisement,nativeEnglishspeakersandthosewhoarefamiliarwithlocalscenicspotsarepreferred.Ithinkyou'reaperfectfitineveryaspect.Ifyouneedanyfurtherinformation,don'thesitatetocontactme.Yours,LiHua第二节Onepossibleversion:Theboy'smouthdroppedopeninexcitement,noddinghishead."I'vecometowelcomeyouintothisroom,theperformertoldhim.Aftertheyoungpatientspoketotheperformerforafewminutes,itwasclearthattheatmosphereintheroomhadswitchedfromstrainedtocalm.SteveaskedSupermantocomeback,andtheperformerpromisedtodosoifhewouldcooperatewiththedoctorsandnurses.ThroughoutSteve'sstayatthehospital,heremainedcooperativeandbrave.Oncehistreatmentwascompleted,Supermanvisitedhimagainaspromised.Withthehelpoftheprogram,theotheryoungpatientsnolongerfearedthehospitaleither.Instead,theyfeltcomfortable,thankstotheirfavoritecharactersvisitingthem.Doctorsandnursesalsohadaneasiertimedealingwiththeirpatients,andoncetheywerereadytoheadhome,theywouldleavethehospitalwithasmileafterwitnessingafarewellperformancefromtheirfavoritesuperheroes.Parentsthankedthehospitalstafffortheirdevotiontothework.Theysaid,totheirchildren,thesearemorethanjustfarewellperformances,butratheracelebrationofabeautifulnewbeginningfortheirkidsastheyleavehospital.部分解析阅读第一节
13.(8分)如图所示,可视为质点的滑块甲和乙静止在水平面上A、C两点,质量均为m=0.5kg,甲在水平向右的力F作用下由静止开始运动,在0-2s内力F的大小为2N,在2s~3s内力F的大小为3NN,3s末撤去力F,此时滑块甲刚好到达B点且此时的速度大小为8m/s再滑行一段距离L并与乙发生弹性碰撞.已知甲、乙与地面间的动摩擦因数相同,B、C两点间的距离L=3.75m,取g=10m/s^2,不计空气阻力,求:(1)甲与地面间的动摩擦因数;(2)甲、乙发生弹性碰撞后乙运动的时间.FABL-LL-C
