大学MOOC 2020秋医学物理实验(山东大学)1461342178 最新慕课完整章节测试答案

实验一 物体的基本测量 Test 1 Basic length measurement

1、单选题：
‍螺旋测微器可以精确测量到：‌‍The screw micrometer can accurately measure,‌
选项：
A: 0.01mm
B: 0.001mm
C: 0.1mm
D: 1mm
答案: 【 0.01mm】

2、单选题：
‏50分度的游标卡尺，其最小读数值为‎‏The minimum reading value of vernier caliper with 50 divisions is‎
选项：
A: 0.05mm
B: 0.02mm
C: 0.50mm
D: 0.20mm
答案: 【 0.02mm】

3、单选题：
‏以下说法错误的选项是：‏‏The wrong choice is，‏
选项：
A: 使用游标卡尺时，要先观察游标的分度，确定其精密度。When using the vernier caliper, the division of the vernier should be observed first to determine its precision.
B: 使用游标卡尺和螺旋测微计时，必须进行零点读数，注意其正负符号。When using vernier caliper and screw micrometer, zero point reading must be carried out, and its positive and negative signs must be noted.
C: 螺旋测微计使用完毕后，应使螺旋测微计的螺旋杆A和固定测量钳口E之间接触后固定，防止因螺旋杆移动而损坏其精密度。同理，游标卡尺的测量钳口AA＇也要接触后固定。After the screw micrometer is used, the screw rod a of the screw micrometer and the fixed measuring jaw e shall be fixed after contacting to prevent the precision of the screw micrometer from being damaged due to the movement of the screw rod. Similarly, the measuring jaw AA 'of vernier caliper should be fixed after contacting.
D: 使用螺旋测微计时，旋转小旋柄B，当听到“咔咔”声响时，不应继续旋转。此时表示测量钳口已经密接或者测量钳口已经与待测元件密接，如果继续旋转旋柄将损坏螺旋测微计的准确度。When the screw micrometer is used, rotate the small handle B. when the "click" sound is heard, the rotation should not continue. At this time, it means that the measuring jaw has been closed or the measuring jaw has been tightly connected with the element to be measured. If the rotary handle is continued to be rotated, the accuracy of the micrometer will be damaged.
答案: 【 螺旋测微计使用完毕后，应使螺旋测微计的螺旋杆A和固定测量钳口E之间接触后固定，防止因螺旋杆移动而损坏其精密度。同理，游标卡尺的测量钳口AA＇也要接触后固定。After the screw micrometer is used, the screw rod a of the screw micrometer and the fixed measuring jaw e shall be fixed after contacting to prevent the precision of the screw micrometer from being damaged due to the movement of the screw rod. Similarly, the measuring jaw AA 'of vernier caliper should be fixed after contacting.】

4、单选题：
‍游标卡尺是由主尺与游标两部分组成的。主尺最小分格常为1 mm，游标上的分格通常取与主尺的M-1分格相当的长度分为M等分。若主尺上每一分格长度为 y mm，游标每一分格长度为 x mm, 那么y-x=‏‍The vernier caliper is composed of the main ruler and the vernier. The minimum division of the main ruler is usually 1 mm, and the partition on the cursor is usually equal to the length of the M-1 grid of the main ruler, which is divided into M-equal divisions. If the length of each division on the ruler is y mm and that of the cursor is x mm, then y-x=‏
选项：
A: y/M
B: y/(M-1)
C: x/M
D: x/(M-1)
答案: 【 y/M】

5、单选题：

‎

​

‎游标读数为：

​

‎The cursor reading is

​选项：
A: 21.48mm
B: 21.44mm
C: 21.54mm
D: 21.49mm
答案: 【 21.48mm】

6、判断题：
‎使用20分度的游标卡尺时，能够读取的毫米部分的最小单位为0.02mm。‌‎When using a vernier caliper with 20 divisions, the minimum unit that can read the millimeter part is 0.02mm.‌
选项：
A: 正确
B: 错误
答案: 【 错误】

7、判断题：
​分光计的游标为30分度，则主尺和游标每小格之差为2'。‌​If the vernier of the spectrometer is 30 degrees, the difference between the main ruler and the vernier is 2 '.‌
选项：
A: 正确
B: 错误
答案: 【 错误】

8、判断题：
测量尺面读数：松开制动螺杆，转动微分筒C，将待测物件正确放置于E与A之间，然后转动微分筒C，当E与A的端面将要与待测物件接触时，旋转小旋柄B，当听到“咔咔”响时（两端正好与物体接触），记下读数。‎‌Measuring scale surface reading: loosen the brake screw, rotate the differential cylinder C, correctly place the object to be measured between E and A, and then turn the differential cylinder C. when the end faces of E and A are about to contact with the object to be measured, rotate the small rotary handle B. when the "click" sound is heard (both ends are just in contact with the object), record the reading.‎
选项：
A: 正确
B: 错误
答案: 【 错误】

9、判断题：
‍螺旋测微计的零点读数A0可正可负，当微分筒上的零刻度线在主尺读数基准线之下时A0为负值，反之为正值。‌‍The zero point reading A0 of the screw micrometer can be positive or negative. When the zero scale line on the differential cylinder is below the reading reference line of the main ruler, A0 is a negative value, otherwise it is a positive value.‌
选项：
A: 正确
B: 错误
答案: 【 错误】

实验七 人体皮肤电阻抗的频率特性 Test 7 Frequency characteristics of skin electrical impedance in human body

1、单选题：
​下列哪个说法是错误的？‍​Which of the following statements is wrong?‍
选项：
A: 皮肤阻抗由表皮、真皮及皮下组织共同决定Skin impedance is determined by epidermis, dermis and subcutaneous tissue
B: 皮肤阻抗的大小主要取决于真皮和皮下组织The size of skin impedance mainly depends on dermis and subcutaneous tissue
C: 真皮和皮下组织的导电性较好The electric conductivity of dermis and subcutaneous tissue is good
D: 皮肤阻抗测量可等效看成对电容器的测量The measurement of skin impedance can be regarded as the measurement of capacitor
答案: 【 皮肤阻抗的大小主要取决于真皮和皮下组织The size of skin impedance mainly depends on dermis and subcutaneous tissue】

2、单选题：
‌下列说法错误的是‍‌Which of the following statements is wrong?‍‌‍
选项：
A: 表皮可看成漏电的电容器The skin can be seen as a leakage capacitor
B: 皮下深部组织具有容性阻抗的特性The deep subcutaneous tissue has the characteristic of capacitive impedance
C: 人体阻抗的特性实质上是电容阻抗的特性The characteristic of human body impedance is essentially the characteristic of capacitance impedance
D: 人体不同部位的皮肤阻抗差别不大The skin impedance of different parts of human body has little difference
答案: 【 人体不同部位的皮肤阻抗差别不大The skin impedance of different parts of human body has little difference】

3、单选题：
‏下列说法正确的是‌‏Which of the following statements is correct ?‌
选项：
A: 皮肤的干湿程度对皮肤的阻抗影响不大The degree of skin dryness and wetness has little effect on skin impedance
B: 皮肤阻抗随着交流电频率的增加而减小Skin impedance decreases with the increase of AC frequency
C: 只要保证手指和电极接触，不改变信号的频率，即可保证测量的重复性As long as the finger and electrode are in contact and the frequency of the signal is not changed, the repeatability of the measurement can be guaranteed
D: 实验过程中要严格按照规程. 为了便于测量，可以增大数字信号输出电压。During the experiment, we should strictly follow the rules.In order to measure data conveniently, the output voltage of digital signal can be increased.
答案: 【 皮肤阻抗随着交流电频率的增加而减小Skin impedance decreases with the increase of AC frequency】

4、单选题：
‎下列说法正确的是​‎Which of the following statements is correct ?​
选项：
A: 皮肤阻抗的测量是基于流入人体和标准电阻的电流一致The measurement of skin impedance is based on that the current flowing into the human body is consistent with the standard resistance
B: 将稳压电源的输出电压可任意设置The output voltage of the regulated power supply can be set arbitrarily
C: 随着频率变化，皮肤阻抗基本不变With the change of frequency, the skin impedance is basically unchanged
D: 不同个体的皮肤阻抗基本差不多The skin impedance of different individuals is almost the same
答案: 【 皮肤阻抗的测量是基于流入人体和标准电阻的电流一致The measurement of skin impedance is based on that the current flowing into the human body is consistent with the standard resistance】

5、多选题：
‏下列说法正确的是‍‏Which of the following statements is correct ?‍‏‍
选项：
A: 人的心理状态对测量结果有影响People's psychological state has an impact on the measurement results
B: 皮肤的湿度对测量结果有影响Skin humidity has an effect on the measurement results
C: 皮肤的接触面积不会对实验结果产生较大影响The contact area of skin has no significant influence on the experimental results
D: 身体健康情况会对测量结果有影响Physical health can affect the measurement results
答案: 【 人的心理状态对测量结果有影响People's psychological state has an impact on the measurement results;
皮肤的湿度对测量结果有影响Skin humidity has an effect on the measurement results;
身体健康情况会对测量结果有影响Physical health can affect the measurement results】

6、判断题：
​测量时，每人放一根手指在不同电极上，然后进行测量读数即可。‌​When measuring, each person puts a finger on different electrodes, and then makes the measurement reading.‌
选项：
A: 正确
B: 错误
答案: 【 错误】

7、判断题：
‍用手指蘸NaCl溶液再进行测量是可增加导电性 。‎‍The conductivity can be increased by dipping the finger in NaCl solution.‎
选项：
A: 正确
B: 错误
答案: 【 正确】

8、判断题：
​一位同学将两手指分别放入两电极之中，保持静止不动，以防止电压读数波动较大。由另一只手改变毫伏表夹具位置来分别测量待测交流电压，并读数记录数值。‏​One student put two fingers into the two electrodes respectively and kept still to prevent the voltage reading from fluctuating greatly. Use the other hand to change the position of the millivoltmeter clamp to measure the AC voltage to be measured, read and record the value.‏
选项：
A: 正确
B: 错误
答案: 【 错误】

9、判断题：
‎利用生物组织与器官的电特性及其变化规律来提取与人体生理、病理状况相关的生物医学信息的检测技术称为生物电阻抗测量。‏‎Bioelectrical impedance measurement  is a detection technology that can extract biomedical information related to physiological and pathological conditions of human body by using the electrical characteristics and change rules of biological tissues and organs.‏
选项：
A: 正确
B: 错误
答案: 【 正确】

实验三 杨氏模量的测量 Test 3 Determination of Young's modulus

1、单选题：
固体物质受到外力拉伸时，产生应变，外力必对固体做功，其结果是：‎When a solid material is stretched by an external force, it will produce strain, and the external force must do work on the solid. The result is as follows,‎‎‎‎‎
选项：
A: 做功变为固体势能的增加Work becomes an increase in the potential energy of a solid
B: 做功变为热Work becomes heat
C: 做功使功能增大Work increases function
D: 使固体运动To cause a solid to move
答案: 【 做功变为固体势能的增加Work becomes an increase in the potential energy of a solid】

2、单选题：
​下列几种直径、长度均相同的金属丝，受力稍微弯曲，去掉外力后，哪种金属丝的形变接近于弹性形变？‏​The following kinds of wires with the same diameter and length are slightly bent under the force. After removing the external force, which kind of wire deformation is close to the elastic deformation？‏
选项：
A: 细钢丝Fine steel wire
B: 细铁丝Fine iron wire
C: 细铜丝Fine copper wire
D: 细铝丝Fine aluminum wire
答案: 【 细钢丝Fine steel wire】

3、单选题：
‍细调光路共轴中，以下率先调节的是：​‍In the fine adjustment of the coaxial light path, what is the first adjustment?​
选项：
A: 旋转目镜，使望远镜分划板上的十字叉丝清晰Rotate the eyepiece to make the cross wire on the telescope reticle clear.
B: 移动标尺架和微调平面镜的仰角，使得通过望远镜筒上的准心往平面镜中观察，能看到标尺的像Move the scale holder and fine tune the elevation angle of the plane mirror so that the image of the ruler can be seen through the collimation center on the telescope tube.
C: 从望远镜内观察光杠杆反射镜内标尺的像，调节物镜的调焦手轮，使标尺刻度成像清晰，而且当眼睛上下移动时，十字叉丝与标尺刻度之间没有相对移动（消除视差）Observe the image of the scale in the light lever mirror from the telescope, adjust the focusing hand wheel of the objective lens to make the scale scale imaging clear. Moreover, when the eyes move up and down, there is no relative movement between the crosshairs and the scale scale (eliminate parallax)
D: 眼睛在目镜处微微上下移动，如果叉丝的像与标尺刻度线的像出现相对位移，应重新微调目镜和物镜，直至视差消除为止The eye moves up and down slightly at the eyepiece. If the image of the fork wire is relative to the image of the scale mark, the eyepiece and objective lens should be adjusted again until the parallax is eliminated.
答案: 【 旋转目镜，使望远镜分划板上的十字叉丝清晰Rotate the eyepiece to make the cross wire on the telescope reticle clear.】

4、单选题：
​目测调节光杠杆的过程中，以下说法正确的是：‌​Which of the following statements is true in the process of visually adjusting the light lever?‌
选项：
A: 使平面镜平行于平台Make the plane mirror parallel to the platform
B: 望远镜平行平面镜Telescope parallel plane mirror
C: 使望远镜与光杠杆等高Make the telescope level with the light lever
D: 标尺平行地面Scale parallel to ground
答案: 【 使望远镜与光杠杆等高Make the telescope level with the light lever】

5、多选题：
​以下说法正确的是：‎​What is the correct statement of the following options?‎
选项：
A: 杨氏弹性模量E仅决定于材料本身的性质，模量越大，物体越不容易变形。Young's modulus of elasticity e only depends on the properties of the material itself. The larger the modulus is, the less likely the object is to deform.
B: 杨氏弹性模量E与外力ΔF，物体的长度L以及截面积S的大小有关，它是表征固体材料性质的一个重要物理量。Young's elastic modulus E is related to external force Δ F, length L and cross section product s. It is an important physical quantity to characterize the properties of solid materials.
C: 将光杠杆平面镜放在工作台上，二前足在工作台的横槽内，后足放在架子上与钢丝几乎接触，但不得与钢丝相碰。Put the flat mirror with light lever on the worktable, the two front feet are in the transverse groove of the working table, and the rear feet are placed on the shelf and almost contact with the steel wire, but it is not allowed to collide with the steel wire.
D: 用游标卡尺分别测出钢丝上、中、下三个部位的直径d，共测三次取平均值。Use vernier caliper to measure the diameter d of the upper, middle and lower parts of the steel wire, and measure the average value for three times.
答案: 【 杨氏弹性模量E仅决定于材料本身的性质，模量越大，物体越不容易变形。Young's modulus of elasticity e only depends on the properties of the material itself. The larger the modulus is, the less likely the object is to deform.;
将光杠杆平面镜放在工作台上，二前足在工作台的横槽内，后足放在架子上与钢丝几乎接触，但不得与钢丝相碰。Put the flat mirror with light lever on the worktable, the two front feet are in the transverse groove of the working table, and the rear feet are placed on the shelf and almost contact with the steel wire, but it is not allowed to collide with the steel wire.】

6、多选题：
​以下说法正确的是：‏​What is the correct statement of the following options?‏
选项：
A: 实验完成后，应将砝码取下，防止钢丝疲劳。After the experiment, the weight should be removed to prevent fatigue of steel wire.
B: 砝码开口部位要对称放置，尽可能的减少切向形变，使砝码的重量竖直向下。The opening part of the weight should be placed symmetrically to reduce the tangential deformation as much as possible, so that the weight of the weight is vertical downward.
C: 每次增加或者取下砝码后，再立即从望远镜上读取标尺上的刻度值。Each time the weight is added or removed, the scale value on the scale is immediately read from the telescope.
D: 观察标尺时不要忽高忽低引起视差，眼睛要正对望远镜。When observing the ruler, do not cause parallax by changing the height and height of the ruler. The eyes should be facing the telescope.
答案: 【 实验完成后，应将砝码取下，防止钢丝疲劳。After the experiment, the weight should be removed to prevent fatigue of steel wire.;
砝码开口部位要对称放置，尽可能的减少切向形变，使砝码的重量竖直向下。The opening part of the weight should be placed symmetrically to reduce the tangential deformation as much as possible, so that the weight of the weight is vertical downward.;
观察标尺时不要忽高忽低引起视差，眼睛要正对望远镜。When observing the ruler, do not cause parallax by changing the height and height of the ruler. The eyes should be facing the telescope.】

7、判断题：
杨氏弹性模量E仅决定于材料本身的性质，而与外力ΔF，物体的长度L以及截面积S的大小无关，它是表征固体材料性质的一个重要物理量。​Young's modulus of elasticity e is only determined by the properties of the material itself, but has nothing to do with the external force Δ F, the length L of the object and the cross section product S. It is an important physical quantity to characterize the properties of solid materials.​​​
选项：
A: 正确
B: 错误
答案: 【 正确】

8、判断题：
‎粗调光路共轴：开始时不要从望远镜内部观察，应先从望远镜的上面，通过准星和缺口观察光杠杆的平面镜里是否有标尺的像。若没有，可通过调节望远镜焦距而使像最终出现在平面镜内。‏‎Coaxiality of the light path: do not observe from the inside of the telescope at first, but observe whether there is a ruler image in the plane mirror of the optical lever from the top of the telescope through the collimation and notch. If not, the image can finally appear in the plane mirror by adjusting the focal length of the telescope.‏
选项：
A: 正确
B: 错误
答案: 【 错误】

9、判断题：
‏将光杠杆放在一张纸上，压出三个足迹后，用螺旋测微器测量后足至前足连线的垂直距离b，重复三次。‎‏Place the light lever on a piece of paper, press out three footprints, and measure the vertical distance b from the hindfoot to the front foot with a screw micrometer, and repeat three times.‎
选项：
A: 正确
B: 错误
答案: 【 错误】

10、判断题：
‎在物体材料弹性限度内，应力大小与物体伸长量成正比，其比例系数为弹性模量。‌‎Within the elastic limit of the material, the stress is directly proportional to the elongation of the object, and its proportional coefficient is the elastic modulus.‌
选项：
A: 正确
B: 错误
答案: 【 错误】

实验九 分光计测光波波长 Test 9 Matters needing attention and thinking questions

1、单选题：
‌以下说法错误的是：‍‌Which statement below is incorrect‍
选项：
A: 衍射光栅是由许多相互平行、等间距的狭缝组成的。两相邻狭缝中心距离d称为光栅常数Diffraction grating is composed of many parallel and equidistant slits. The distance d between two adjacent slit centers is called grating constant
B: 当光通过光栅时，通过同一狭缝的光产生衍射，而通过不同狭缝的衍射光彼此之间又产生干涉，在屏上呈现的衍射图样是衍射和干涉的总效果When the light passes through the grating, the light passing through the same slit will diffract, and the diffracted light through different slits will interfere with each other. The diffraction pattern displayed on the screen is the total effect of diffraction and interference
C: 光栅衍射所形成的明暗条纹的分布有一定规律，利用这种规律，可求出光波波长或光栅常数The distribution of the light and dark fringes formed b