[今日更新]江西省2023~2024学年度七年级下学期期中综合评估 6L R-JX.物理试卷答案

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B.Theycouldhaveasmuchsleepaspossibleonweckends.C.Theirliverandmuscleinsulinsensitivitywasreduced.D.Theirabilitytoregulatebloodsugarwasfoundworsened.34.Whatdoestheauthoradviscreaderstodoaccordingtothetext?A.Tosleepextrahoursonweekends.B.Tosnacklessbeforeslcep.C.Totradesomesweetsaspossible.D.Togetenoughslecponweekdays.35.Fromwhichpartofawebsiteisthetextprobablytaken?A.CultureB.Health.C.Sci-tech.D.Fashion.第二节：（共5小题：每小题2.5分，满分12.5分）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选项

Scienceshowsthatstretching(isessentialafterexercise.Stretchinglengthensandmobilizestheconncctivetissuearoundyourmuscle.What'smore,stretchinghelpsyourbloodflowandevenrelievesyourstress.36Youcouldfeelsick.Youwon'tbesurprisedtoknowthatwhenyouexercisc,youraiseyourheartrateforaperiodoftime.Whileit'sgreattogetthatbloodflowing,it'sjustasimportanttogetyourheartratebacktoanormallevelaftertheworkoutisover.37Asyourheartisbeatingfasterandyourbodytemperatureishigher,youcouldpassoutorfeelsickifyoustoptoofast.Stretchingafterphysicalactivityallowsagradualdecreaseattheendoftheepisode.Yourmuscleswilllikelybecomestifferandmoresore.Whenyouexerciseyourmuscles,itproduceslacticacid()whichisactuallywhatcausesyourmusclestobecomesore.Whenyourestbetweenperiodsofexercise,yourbodynaturallybreaksdownthatlacticacid.Onethingthathelpsyourbodygetridofthatlacticacid?38.Stretchinghelpsyoudistributeoxygenthroughoutyourbody,whichcanreducelacticacidproductionandridyourmusclesofanyaccumulationoflacticacid.39Flexibilityisclosclyrelatedtoinjuryrisk.Poorflexibilitywillcauscyoutohavemusclesthatgettiredquickerandjointsthataremorelikelytosufferfrominjury.Besides,yourweakenedrangeofmotionwillleadtolessbloodandnutrientstoyourjoints.40Stickingtostretchingexerciseafterphysicalactivitycanhopefullyimproveyourflexibility.A.You'llbeatriskofinjury.B.Yougucssedit:Stretching.C.You'llimproveyourflexibilitybystrctching.高一英语试卷共11页第7页

(1(5分)关于波的干涉,下列说法正确的是。(填正确答案标号。选对1个得2分,选对2个得4分,选对3个得5分。每选错1个扣3分,最低得分为0分)A.两列波发生干涉时,振动加强点的能量始终最大B.两列波发生干涉时,振动加强的质点,位移始终最大C.两列频率相同的波相遇时,波峰与波峰、波谷与波谷相遇的点是振动加强点D.要得到稳定的干涉图样的条件是两列波的频率和振幅一定相等E.两列波发生干涉现象,说明两列波的频率一定相等

拣站无人转运小车刹车系统的原理图如图10.某快递分拣站无人转运小车刹车系统的原理图如图甲、乙所示,在小车的底部安装有磁10.方方生铁,磁铁会在边长为d的正方形区域内产生竖直向下的匀强磁场,如图甲所示;小车减速甲、乙所示,在小车的底部安装有磁道所磁场,如图甲所示;小车减速路段为一段足够长的水平直轨道,如图乙所示,其表面连续铺有相同的正方形线圈,所有<L(L<d<2L),相邻线圈相互互绝面连续轴有相同的正方形线圈,所有线圈的边长都为L(L<d<2L),相邻线圈相互绝缘,它们的间隙忽略不计。小车进入减隙忽略不计。小车进人减速路段时自动关闭发动机,之后小车开始减速。已知小车(含快递)的总质量为m,小车关闭发动机时的速度大小为v=28n^2B^2L^33mR,所所有线圈的电阻都为R,匝数都为n,轨道宽n察度大于磁场区域的边长d,不计摩擦和空气阻力。对小车刹车过程,下列说法正确的是A.小车减速运动与匀速运动交替进行B.小车一直减速直至速度为0C.小车的位移大小为31L6D.最后一个有电流通过的线圈通过的电荷量为n^2BL^26R

12.小明研究小虫子在圆柱体上的运动。如图所示为水平放置的半个圆柱体横截面,将一只小虫子置于其顶部A,虫子沿圆弧面从A到B缓缓爬行,圆柱体的半径比虫子大得多,=60^;多次观察发现:小虫在B点上方时可以正常缓慢爬行,一旦由上往下过了B点便会滑落。设最大静摩擦力等于滑动摩擦力,动摩擦因数为,虫子质量为m,,虫子在B点时对圆柱体的压力为FNa。下列判断正确的是A.FN=12mgB.=33C.小虫从A运动到B的过程中,对圆柱体的作用力不变D.小虫从A运动到B的过程中,由于对圆柱体的压力变小,所受摩擦力变小