2018八年级物理上册试题(带答案).pdf

八年级物理试题（总分：100 分时间：90 分钟）一、选择题（每题 3 分，共 36 分）1.关于速度，下列说法正确的是（）A速度是表示物体通过路程长短的物理量B速度是表示物体运动时间的物理量C速度是表示物体运动快慢的物理量D物体通过的路程越长，速度就越大2关于参照物，下列说法错误的是（）A只能选择那些固定在地面上不动的物体作为参照物B判断一个物体是静止还是运动，与参照物的选择有关C一个物体是运动还是静止，都是相对于所选定的参照物而言的D研究地面上物体的运动，常选地面或固定在地面上不动的物体为参照物3关于误差，下列说法中正确的是（）A误差是由于测量方法不正确造成的B无论测量仪器如何精密，误差只能减小，不能消灭C只要测量仪器足够精密，就可以消灭误差D以上说法都正确4火车在平直的轨道上以20m/s的速度做匀速运动，通过的路程是200m，则通过这段路所用的时间是（）A.1h B.5min C.10s D.50s 5下列关于声现象的说法中正确的是（）A一切发声的物体都在振动B声音在不同介质中的传播速度相同C声音在真空中的传播速度为340m/s D公路旁安装“声障墙”是在声源处减弱噪声6在公共场所“轻声”说话是文明的表现，在课堂上“大声”回答问题才能让老师和同学们都能听清楚，这里的“轻声”和“大声”是指声音的（）A音调B响度C音色D声速7在同一架钢琴上，弹奏C 调“3(mi)”和“1(dou)”这两个音，以下说法正确的是（）A音色一定不同B音调一定不同 C响度一定不同D音调、音色和响度都不同8下列关于温度的描述中符合实际的是（）A发高烧时人体温度可达40 B冰箱冷冻室的温度为10 C饺子煮熟即将出锅时温度为50 D加冰的橙汁饮料温度为-20 92010 年春季，西南地区遭遇罕见的世纪大旱。为了节约用水，果农们利用了滴灌的方法给果树浇水，如图1 所示。他们把细水管放入果树下的土里，使水分直接渗透到果树根部，减慢了水分的蒸发，原因是（）A减少了水在地面的表面积B增大了水在地面的表面积C加快了地面上方空气的流动D提高了地面上水的温度 10 如图 2 是小明绘制的某种物质熔化时的温度时间图象。下面说法正确的是（）A图线中间的水平线段表示这段时间内物体不吸热B图线可能是冰的熔化过程C图线可能是蜡的熔化过程D图线表示某晶体的熔化过程11 下列各种现象形成的过程中，需要吸收热量的是（）A冬天，紧闭的玻璃窗内壁出现冰花B冰箱内取出的西红柿“冒汗”C衣柜内的卫生球逐渐变小D用铁水浇铸工件文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L312 两盆水里面都有没熔化的冰块，一盆放在阳光下，一盆放在阴凉处，在盆内冰块均未熔化完前，两盆的水温相比（）A在阳光下的那盆水的温度高B两盆一样高C在阴凉处的那盆水的温度高D无法确定二、填空（每空 1 分，共 22 分）13 开通在即的安庆到南京高铁设计最高速度可达360km/h，合 _m/s；中学生步行的速度大约是1.1_ _（填单位）。14 某同学四次测同一物体的长度得到的测量结果分别是：3.62cm、3.63cm、3.58cm、3.62cm，在测量中存在错误的数据是_，该物体的长度应记为_。15 加油机给战斗机加油，以加油机为参照物，战斗机是 _ _（选填“静止”或“运动”）。如果战斗机在2s 内飞行了0.6km，则它的速度是_ _m/s。16 甲、乙两物体都做匀速直线运动，它们路程之比是2：1，它们速度之比是2：3，则甲、乙两物体所用时间之比是_ _。17 某同学郊游时，用半小时走完2km 的路程，休息半小时后，再用30 min走完 2.5km的路程。那么，他全程的平均速度是km/h。18 小强在家里看书，突然屋外有人大声叫他，他一听便知道是同学小明，正所谓“闻其声而知其人”，这是依据声音的_ 不同来判断的。小明说话“声音洪亮”，反映他说话声音的 _ 大。19 端午节期间，郑能随父母到山区爬山，他向着远处的山崖大喊一声，约 1.6s 听到回声，他们距山崖大约_ _m，声速按340m/s计算声音在空气中以_ 形式传播。20 如 图 3 所示是几种声音输入到示波器上时显示的波形，其中音调相同的是_；响度相同的是 _ 文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L321 即使在 0以下的冬天，室外冰冻的衣服也能晾干，这是 _（填写物态变化名称）现象，在这个过程中需要（填“吸收”或“放出”）热量。22 今年我国西南地区遭遇严重干旱，为减缓旱情某部空军出动飞机在云层中播撒干冰（固体二氧化碳）实施人工降雨，靠干冰的吸收大量的热，使云中水滴增大，冰晶增多，形成降雨，其中冰晶在下落过程中成水（以上两空填物态变化名称）23 用蒸笼蒸馒头，是上层还是下层蒸格中的馒头先熟呢？小明仔细观察后发现：高温的水蒸气经过多层蒸格向上升，遇到冷的蒸笼盖时，大量水蒸气发生（填物态变化）现象，（填“吸收”、“放出”）很多热量，从而会使上层蒸格中的馒头先熟。24 如图 4 所示，甲是体温计，乙是实验室用温度计，它们都是利用液体_ 的性质制成的，可用来测沸水温度的是_ 三、实验题（每空分，共21 分）25 如图 5 所示，甲中刻度尺的读数为cm；乙中秒表的读数为s。26 如图 6 所示，小明在“测小车平均速度”的实验中，设计如图所示的装置：小车从带有刻度（分度值为1mm）的斜面顶端由静止开始下滑，图中圆圈是小车到达A、B、C 三处时电子表显示的时刻（数字表示“时：分：秒”），则：（1）改实验是根据公式进行测量的；（2）实验中为了方便计时，应使斜面的坡度较(选填“大”或“小”)；（3）根据图中所给信息回答：SAB=cm，tBC=s，VAC=m/s 文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L327 如图 7 甲所示，用竖直悬挂的泡沫塑料球接触发声的音叉时，泡沫塑料球被弹起，这个现象说明发声体在_；如图乙所示，敲击右边的音叉，左边完全相同的音叉把泡沫塑料球弹起，这个现象说明声音在 _ 中传播。28 小闵用一把钢尺来探究音调的高低与发声体结构的关系，她把尺子固定在桌面上，先把钢尺伸出桌子边沿多一些，使它振动发声；然后再把尺子伸出桌子边沿少一些，再使其发声，比较两次音调的高低。（1）在她的两次实验中，应该保持不变，实验的结果是：尺子伸出桌子边沿越多，它发声的音调越。（2）她若探究响度与振动幅度的关系，则应该保持不变，改变尺子振动的幅度，实验后得出的结论是：发声体结构不变时，声音的响度越大。29 如图 8 甲所示，是探究冰和蜡的熔化过程的实验装置。器材有：冰、蜡、热水瓶、试管、烧杯、铁架台（带铁夹）、搅棒、秒表、温度计、水。（1）图乙是（选填“冰”或“蜡”）的温度随时间变化的图象。图丙所示温度计显示的是蜡某时刻的温度，它的示数是。（2）在冰和蜡熔化过程中，如果将试管从烧杯中拿出来，冰和蜡停止熔化。将试管放回烧杯后，冰和蜡又继续熔化。说明固体熔化时需要（选填“吸收”或“放出”）热量。30 如图 9 甲所示，是探究冰和蜡的熔化过程的实验装置。器材有：冰、蜡、热水瓶、试管、烧杯、铁架台（带铁夹）、搅棒、秒表、温度计、水。（1）水是沸点是 _0C，这说明当时水面上方的气压_（高于、低于、等于）文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3一个标准大气压。（2）沸腾时水温随时间变化的特点是_。（选填升高、降低、不变）（3）在“观察水的沸腾”实验中，为了缩短加热时间，可以采取哪些措施？至少说出两条。四、计算题（共 2 1 分）31 甲乙两地的距离是900km，一列火车从甲地早上7：30 出发开往乙地，途中停靠了几个车站，在当日 16：30 到达乙地列车行驶途中以144km/h 的速度匀速通过长度为400m的桥梁，列车全部通过桥梁的时间是25s求：（1）火车从甲地开往乙地的平均速度是多少km/h？（2）火车的长度是多少m？32 改革开放以来，我国的高速铁路建设已经达到国际先进水平。已知成渝高速铁路全程308km，重庆境内约121km，重庆至成都全程运行仅需1.4h。求（1）高铁列车从重庆至成都全程运行的平均速度是多少k m/h；（2）若高铁列车在重庆境内也按全程运行的平均速度运行，列车在重庆境内运行的时间。33.小虎乘坐着一艘速度为10m/s的汽艇匀速驶向一座山崖，他向山崖大喊一声，历时5s 听到回声，已知声音在空气中传播的速度为340m/s。求：（1）5s 内，声音在空气中传播的路程是多少；（2）汽艇匀速行驶0.4km所花的时间是多少；（3）他听到回声时离山崖文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3有多远。初二物理答案一选择题（每小题 3 分，共 36 分）题号 1 2 3 4 5 6 7 8 9 10 11 12 答案 C A B C A B B A A D C B 二、填空 题（每空 1 分，共 22 分）13、_100 _、_m/s _ 14、_3.58cm _、_3.62cm _ 15、_ 静止_、_ 300 _ 16、_3:1 _ 17、_3 _ 18、_ 音色_、_ 响度_ 19._ _272_ _、_ 波_ 20、_ 甲乙_、_ 甲丙_ 21、_ 升华_、_ 吸收22、_ 升华_、_熔化_ 23、_ 液化_、_ 放出24、_热胀冷缩_、_乙_ 三、（每空 1 分，共 21 分）25._ 5.20_ _、_ 337.5_ 26.(1)_ v=s/t _ _(2)_ 小 _(3)4.00 、1 、0.03 27._ 振动 _ _、_ _空气_ 28.(1)振幅、低(2)尺子伸出桌面长度、振幅越大29.(1)冰、51 (2)吸收30.(1)100 、等于(2)不变文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L3文档编码:CO10I3N1V3R7 HR5Q7X4K6T6 ZZ4H10X1H7L