您所在的当前位置：初中物理试题 >

误差及其减小方法

> 采用正确的方法进行长度的测量时，要减小人为的误差，可采用的方法是 A.用分度值小的测量仪器进行测量 B.多人分别测量，取平均值的方法 C.多种仪器测量，取平均值的方法 D.上述说法均不正确

问题：

发布时间：2024-09-11

采用正确的方法进行长度的测量时，要减小人为的误差，可采用的方法是

A.用分度值小的测量仪器进行测量
B.多人分别测量，取平均值的方法
C.多种仪器测量，取平均值的方法
D.上述说法均不正确

参考答案：

提问用户：7I***DK6

可能感兴趣的题目：

1 函数f（x）=acos（ax+θ）（a＞0）图象上两相邻的最低点与最高点之间的距离的最小值是______．
2 设地球的半径为 R 0，质量为 m的卫星在距地面2 R 0高处做匀速圆周运动，地面的重力加速度为 g，则下列说法不正确的是（） A．卫星的线速度为 B．卫星的角速度为 C．卫星的加速度为 D．卫星的周期为2π
3 从海陆位置上看，我国是一个 A.群岛国家 B.内陆国家 C.半岛国家 D.临海国家
4 把一个乒乓球竖直向上抛出，若空气阻力大小不变，则乒乓球上升到最高点和从最高点返回到抛出点的过程相比较（　　） A．空气阻力的冲量在两个过程中的方向相反 B．合外力在上升过程的冲量大 C．重力的冲量在两个过程中的方向相反 D．重力在上升过程的冲量大
5 若f（n）=sin nπ 6 则f（1）+f（2）+f（3）+…+f（102）=______．
6 完形填空。 When I was walking down the street the other day, I happened to 1 a small brown leather purse lying on the sidewalk. I picked it up and opened it to see if I could 2 the owner"s name. There was nothing inside it 3 some change and an old photo―a picture of a woman and a young girl of about twelve years, who looked like the woman"s daughter. I put the photo back and 4 the purse to the police station, where I 5 it to the desk sergeant. 6 I left, the sergeant took down my name and address 7 the owner might want to write and thank me. That evening I went to have dinner with my aunt and uncle. They 8 a young woman so that there would be four people at the table. Her face was familiar. I was 9 sure that we had not met before, but I could remember where I had seen her. In the course of conversation, however, the young woman happened to mention that she had lost her purse that afternoon. 10 I realized where I had seen her. She was the young girl in the photo, although she was now much older. ( )1. A. watch ( )2. A. find ( )3. A. besides ( )4. A. took ( )5. A. offered ( )6. A. Before ( )7. A. although ( )8. A. have also invited ( )9. A. well ( )10. A. All at once B. notice B. learn B. except B. brought B. passed B. When B. in case B. also had invited B. much B. At once C. discover C. discover C. except for C. fetched C. handed C. While C. for fear C. also invited C. quite C. Immediately D. find out D. work out D. in addition to D. sent D. returned D. As D. so that D. had also invited D. very D. All suddenly
7 把HCl气体通入到饱和食盐水中会发生的变化是 A．溶液酸性增强 B．产生少量氯气和氢气 C．有晶体析出 D．产生微量氧气
8 已知| a |=4，| b |=5，| a + b |= 21 ，求：① a • b ②（2 a - b ）•（ a +3 b ）
9 （36分）气象干旱是指某时段内，蒸发量和降水量的收支不平衡，水分支出大于水分收入而造成的水分短缺现象。读我国两地区气象干旱分布图，回答下列问题。（1）分析甲地区春季气象干旱多发的主要原因。（6分）（2）甲、乙两地区的旱灾都会给其农业生产带来严重损失，但从发生时间看，地区的旱灾对其农业生产影响更大，比较分析原因。（18分）（3）除了对农业生产的影响外，干旱也会给人民生活带来巨大影响，以乙地区旱灾为例，列举一些具体表现。（6分）（4）研究灾区人口分布、农作物受灾面积，受旱时间长短三者之间的关系，应该采用的现代化技术是和。（6分）
10 在我们日常的体育课当中，体育老师讲解篮球的接触技巧时，经常这样模拟：当接迎面飞来的篮球，手接触到球以后，两臂随球后引至胸前把球接住．这样做的目的是（　　） A．减小篮球的冲量 B．减小篮球的动量变化 C．增大篮球的动量变化 D．减小篮球的动量变化率