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【免费下载】精编浙江省宁波市象山县文峰学校20212022学年八年级上学期期中物理试题

  • 2026-02-24 14:03:02
【免费下载】精编浙江省宁波市象山县文峰学校20212022学年八年级上学期期中物理试题

学年浙江省宁波市象山县文峰学校八年级(上)期中物理试

一、选择题(本题共25小题,每小题2分,共50分,只有一个符合题意的选项,不选、错选、多选均不给分)

1. 人们要认识事物,就要对事物进行比较,引入相应的物理量。以下错误的是(  )

A. 进行长短的比较,引入“长度”的物理量

B. 进行多少的比较,引入“质量”的物理量

C. 进行压力作用效果的比较,引入“功率”的物理量

D. 进行运动快慢的比较,引入“速度”的物理量

2. 用真空采血管抽血时,将采血针一端刺入人体静脉后,另一端插入真空采血管的胶塞,血液便会自动流入采血管。血液能够流进真空采血管的动力来自(  )

A. 大气压B. 人体内血压C. 护士的拉力D. 血液自身重力

3. 时下的街头,一些年轻人喜欢在自己的汽车尾部贴上一些幽默、搞笑的车标。下列哪辆车的车标警示防止因为惯性带来的碰撞事故(  )

A. 甲车:你让我也让,心宽路更宽

B. 乙车:驾校除名,自学成才

C. 丙车:别嘀、嘀,越催越慢,再催熄火

D. 丁车:新手初驾,擅长急刹

4. 你有过登高远眺的体验吗?在高山顶上眺望远处时会看到四周有一圈“天地分界线”,这就是在高处看到的地平线,乘坐飞机时通过舷窗也可以看到这条“天地分界线”。如果飞机起飞不久还在继续爬升阶段,你通过右边的舷窗看到的应该是如图所示的哪一幅(  )

AB. 

C. D. 

5. 下列物体的受力分析,错误的是

A. 放在水平面上的木块

B. 挂在天花板上的小球

C. 静止在斜面上的木块

D. 被细线拉住的氢气球

6. 学校每周都举行升旗仪式,当国旗匀速上升时,下列哪一对力是平衡力(  )

A. 国旗受到的重力和国旗对地球的吸引力

B. 国旗对绳的拉力和绳对国旗的拉力

C. 国旗受到的重力和绳对国旗的拉力

D. 国旗对绳的拉力和国旗受到的重力

7. 下列有关力学知识应用的观点正确的是(  )

A. 船闸是利用大气压方便船舶通行的

B. 高压锅是利用气体压强越大沸点越高工作的

C. 潜水艇是通过增大浮力来实现上浮的

D. 飞机机翼的升力是利用了流速越大压强越大的原理

8. 为了探究力和运动的关系,几位同学将体重计放在电梯中。一位同学站在体重计上,然后乘坐电梯从1层直接到10层,之后又从10层直接回到1层。并用照相机进行了相关记录,如图所示,图中右上角为电梯显示的层数和运行方向。以下分析正确的是(  )

A. 该同学的质量是50kg

B. 2中电梯在向上匀速运动

C. 4中电梯在向下匀速运动

D. 2、图3和图4中该同学受非平衡力作用

9. 如图所示,AB两个物体叠放在水平面上,同时有F=2N 的两个水平力分别作用于AB两物体上,使AB两个物体处于静止状态,下列分析正确的是(  )

A. 地面对B的摩擦力为 0

B. AB之间摩擦力为0

C. 地面对B的摩擦力为 2N,方向水平向左

D. 地面对B的摩擦力为 2N,方向水平向右

10. 垫排球是我市一项体育测试项目,下列对排球离开后继续上升过程分析正确的是(  )

A. 速度越来越小B. 受到的重力越来越大

C. 到达最高点时受力平衡D. 球受到惯性作用

11. a,b,c为三种不同的液体,它们的质量与体积的关系如图所示(  )

A. a,b,c的质量相同,a的体积最大

B. a,b,c的质量相同,a的体积最小

C. a,b,c的体积相同,b的质量最大

D. a,b,c的体积相同,b的质量最小

12. 冰的密度为0.9/厘米3,一块13的冰熔化成水后,下列结论正确的是(  )

A. 质量不变,密度变大,体积是13.

B. 质量变小,密度不变,体积是13

C. 质量变小,密度不变,体积是0.93

D. 质量不变,密度变大,体积是0.93

13. 小伟同学利用天平和量筒测橙汁的密度,下列操作步骤中多余的是

A. 用天平测量空烧杯的质量

B. 将橙汁倒入烧杯中,用天平测量烧杯和橙汁的总质量

C. 将烧杯中的橙汁倒入量筒中一部分,测出量筒中橙汁的体积

D. 用天平测量烧杯和剩余橙汁的总质量

14. 中央电视台少儿节目“大风车”中有一栏目常给中小学生介绍一些科普知识,其中有一期介绍了一种叫“天气预报瓶”的创意新品。如图所示,A为玻璃管与大气相连,B为密闭的玻璃球内装有红墨水,它能显示天气的好坏,随着环境气压的变化,A管内的水位会上升或下降。小科仿制了一个,发现比较灵。下列说法不正确的是(  )

A. 天气预报瓶利用天气和大气压的关系进行预报的

B. A管和B球液面相平时,显示内外气压一致

C. A管液面明显下降时,往往转为阴雨天气

D. B球内装较多红墨水,可以减少瓶内温度变化造成干扰

15. 如图所示,桌面上是两个完全相同圆柱形平底杯子,里面分别盛有质量相等的水和酒精,两点到杯子底部的距离相等,已知水的密度kg/m3,酒精的密度kg/m3,则两点的压强pApB的大小关系是( )

A. pApBB. pApBC. pApBD. 无法确定

16. 将BA两个磁环先后套在光滑的木支架上,并使两磁环相对面的极性相同,

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  1. CONNECT:[ UseTime:0.000665s ] mysql:host=127.0.0.1;port=3306;dbname=no_yeyulingfeng;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000861s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000364s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000285s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000509s ]
  6. SELECT * FROM `set` [ RunTime:0.000184s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000599s ]
  8. SELECT * FROM `article` WHERE `id` = 469924 LIMIT 1 [ RunTime:0.009236s ]
  9. UPDATE `article` SET `lasttime` = 1771915546 WHERE `id` = 469924 [ RunTime:0.000681s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000242s ]
  11. SELECT * FROM `article` WHERE `id` < 469924 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000399s ]
  12. SELECT * FROM `article` WHERE `id` > 469924 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000450s ]
  13. SELECT * FROM `article` WHERE `id` < 469924 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.010646s ]
  14. SELECT * FROM `article` WHERE `id` < 469924 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.014969s ]
  15. SELECT * FROM `article` WHERE `id` < 469924 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001338s ]
0.109754s