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42、n1page: Section1DIV.MyFav_1245207347674 OLMARGIN-BOTTOM: 0cmDIV.MyFav_1245207347674 ULMARGIN-BOTTOM: 0cm一、选择题（112小题为单项选择题，每小题2分；1316小题为多项选择题，每小题全部选对的得3分，选对但选不全的得2分，选错或不选的得0分，共36分）1下列估测中，最接近实际的是（ ）A正式比赛的篮球架的篮板高约20mB常人的正常步行速度约12m/sC一盏家用白炽灯泡的正常工作电流约2AD物理书的质量约18kg2汽油机是由四个冲程不断循环而工作的，图1中表示内能转化为机械能的冲程是（ ）图
43、13下列关于声音的说法中不正确的是（ ）A“响鼓也要重锤敲”，说明声音是由振动产生的，且振幅越大响度越大B“震耳欲聋”说明声音的音调高C“隔墙有耳”，说明固体能传声D“闻其声知其人”，说明可以根据音色来判断说话者4某同学站在匀速行驶的车厢中，该同学受到的平衡力为（ ）A人的重力和车对人的支持力B人的重力和人对车的压力C车对人向前的推力和车对人的摩擦力D人对车的压力和车对人的支持力5某同学把二件相同的湿衣服分别晾在二间相同的室内，一间窗户打开，另一间窗户紧闭，发现窗户打开那间室内的衣服干得较快，该同学主要研究蒸发快慢与（ ）A液体的温度有关B液体的表面积有关C衣服表面附近空气的流速有关D液体的温
44、度、液体的表面积和衣服表面附近空气的流速都有关6中国是掌握空中加油技术的少数国家之一。如图2所示，加油过程中加油机、受油机沿同一方向以相同的速度水平飞行。这时候以下面的哪一物体为参照物，认为加油机是运动的（ ）A受油机B大地C加油机里的飞行员D受油机里的飞行员图2 图37在图3所示的电路中，电源电压保持不变。闭合开关后，电路正常工作。当滑动变阻器的滑片向左移动时，有一只电表的示数突然为零。发生这一现象的原因，下列判断正确的是（ ）A可能R1断路B可能R2断路C可能R1短路D可能R2短路8图4所示的电路中，有可能损坏电流表的是（ ）图49王小虎同学听到上课铃响了，他一口气从一楼跑到三楼，用时10
45、s。那么他在上楼过程中，克服自己重力做功的功率最接近（ ）A3W B30W C300W D3000W10电流看不见、摸不着，判断电路中是否有电流时，我们可通过电路中的灯泡是否发光去确定，这种方法在科学上叫做“转换法”。下面是小红同学在学习中遇到的四个研究实例，其中采取的方法与研究电路中是否有电流方法相同的是（ ）A通过测100张纸的厚度来测1张纸的厚度B人们通过研究墨水的扩散现象认识分子的运动情况C研究电流与电压、电阻关系时，控制电阻(电压)不变，研究电流与电压(电阻)关系D学习电压时，我们可以通过对比水压来认识它11图5中下划线部分有利于减小压强的是（ ）图512如图6甲所示，一只大熊猫正抱
46、着一根竹子在镜前欣赏自己的像。此时，它从镜中看到的自身像应该是图6乙中的哪一个（ ）图613图7中的几幅图片展示的是福娃小运动健将在进行奥运比赛的场面。下面是李明对该比赛情景的分析，其中正确的是（ ）A踢出去的足球在空中仍然受到重力和脚的踢力B投篮时，篮球脱手后在空中下降的过程中，福娃对篮球不再做功C击出的羽毛球能在空中继续飞行，是由于羽毛球具有惯性D用桨向后划水，皮划艇会前进，这是由于力的作用是相互的图714如图8所示正确的是（ ）图815李明同学阅读了下表后，得出了一些结论，其中不正确的是（ ）A不同的物质，密度一定不同B固体的密度都比液体的密度大C同种物质在不同状态下，其密度一般不同D质
47、量相等的实心铜块和实心铅块，铜块的体积比铅块的体积小16小明同学在“探究通过导体的电流与其两端电压的关系”时，将记录的实验数据通过整理作出了如图9所示的图像，根据图像，下列说法错误的是（ ）图9A当在导体乙的两端加上1V的电压时，通过导体乙的电流为01AB将甲、乙两导体并联后接到电压为3V的电源上时，干路中的电流为09AC通过导体甲的电流与其两端的电压成正比D导体甲的电阻大于导体乙的电阻二、填空题（本题共9小题，每小题2分，共18分）17标志我国航天领域又一重大进展的“嫦娥探月”工程开始实施。月球表面几乎是真空，当两宇航员登上月球后，相互间必须借助无线电通讯设备才能通话。这说明_可以在真空中传
48、播，而真空不能_。18一切正在发声的物体都在，声的传播需要介质，在空气、水和铁三种介质中，传声最快的是铁。某飞机的速度是2倍音速，则这架飞机5秒内飞行的距离是（声速取340m/s）。19如图10所示，某同学将一支圆珠笔摁在桌面上，准确地说，他是利用力使笔向下压的。松手后发现圆珠笔竖直向上跳起。圆珠笔从松手到上升到最高点的过程中，有关的能量转化是。20太阳能是人类能源宝库，太阳能集热器是直接利用太阳能的一种装置，它可以利用太阳能把水加热，太阳能集热器主要由集热板和贮水器两部分组成，如图11所示：(1)贮水器总比集热板的位置高，这是因为。(2)集热板是黑色的，这是因为。图10 图11 图12 图1321在一辆行驶的汽车车厢里其顶壁上挂着一个小球。当出现了如图12所示的情景时，汽车在做_（填“加速”、“匀速”、“减速”）运动。此时绳子对球的拉力和球受到的重力_（填“是”、“不是”、“可能是”）一对平衡力