听阈曲线即为响度级为 0 昉的等响曲线，痛阈曲线则为响度级为 120 昉的等响曲线。Audible threshold curve is the equal-loudness curve with loudness level of 0 Phon，while pain threshold curve has a loudness level of 120 Phon.
设一汽车产生的声强级为80dB，那么100辆汽车产生的声强级为：Consider the sound intensity level of one vehicle is 80dB, then what about the sound intensity level of 100 vehicles:
以下说法正确的是：Which option is correct
A. 驻波的能量在相邻的波腹和波节间往复变化，波腹附近的势能与波节附近的动能之间不断进行着互相转换和转移The energy of the standing wave changes back and forth between the adjacent wave belly and wave node, and the potential energy near the wave belly and the kinetic energy near the wave node are continuously converted and transferred
B. 驻波的波形不随时间变化The waveform of standing wave does not change with time
C. 驻波没有能量的定向传播Standing waves don\'t have directional propagation of energy
D. 驻波没有振动状态或相位的传播Standing waves don\'t have the propagation of vibrational state or phase
以频率的常用对数为横坐标，声强级为纵坐标，绘出不同频率的声音与 10000Hz 的标准声音等响时的声强级与频率的关系曲线，得到的曲线称为等响曲线。Take the logarithm of frequency as the abscissa and the sound intensity level as the ordinate, and draw the relationship curve between the frequency and the sound intensity level when the sound of different frequencies and the standard sound of 10000 Hz are equal-loudness.Such curve is called the equal-loudness curve.
在同一频率下，响度会随声强级的增大而增大。At the same frequency, loudness increases with the increase of sound intensity level
想增强照片的反差，以下操作相对最次要的是：To enhance the contrast of photos, which operation listed below is relatively leastsignificant:
A. 尽量使用低感光度Try to use lower photosensibility
B. 要保证对焦准确Ensure the accurate of the focus
C. 调节亮度调节器Adjust the brightness regulator
D. 可以换用不同的滤色镜观察照片效果Try different filters to seek out the best one
显微镜用完后，以下操作不对的是：Whichoperation below is incorrect after finishing the use ofmicroscope
A. 关闭光圈，盖好防尘罩Close the aperture and cover the microscope with dust cover
B. 将四倍镜头对准镜台孔Aim the 4x lens at the aperture of mirror stage
C. 降低镜台，降下聚光器Lower the stage, lower the concentrator
D. 要将光源亮度调至最低Minimize the brightness of the light source
从光学系统的最小分辨角可以知道，想提高光学系统的分辨本领，可采取哪种方法：Based on the minimum resolution angle of the optical system, which method can be adopted to improve the resolution ability of the optical system
A. 增大光学仪器的通光口径Increase the aperture of optical instruments
B. 减小光学仪器的通光口径Reduce the aperture of optical instruments
C. 缩小载波的波长Reduce the wavelength of carrier wave
D. 增大载波的波长Increase the wavelength of the carrier
放大率由物镜和目镜共同所决定大小，而分辨本领仅由物镜决定大小。The magnification is determined by the objective and eyepiece together, while the resolution is only determined by the objective lens.
用紫外线(λ=275nm) 代替可见光能使分辨本领提高一倍，但眼睛看不见，只能用于拍照。Using ultraviolet (λ = 275nm) instead of visible light can double the resolution, but the ultraviolet lightcannot been seen and only be used for taking pictures.
光学系统能分辨开两物点的最短距离称为光学系统的分辨本领。The shortest distance that an optical system can distinguish two points is called the resolving power of the optical system.
显微镜放大率等于物镜线放大率m与目镜角放大率α的和。The magnification of the microscope is equal to the sum of the linear magnification m of the objective lens and the angular magnification α of the eyepiece.
超声声速测定实验中，如果读数的时候用的是十分度的游标卡尺，则以下选项读数正确的是？In the experiment of ultrasonic velocity measurement, if a vernier caliper with ten divisions is used for reading, what is the correct reading of the following options?
使用旋光计时，下列说法不正确的是？When using a polarimeter, what is the following incorrect statement?
A. 葡糖糖溶液的旋光度与光路长度和浓度都有关系The optical rotation of glucose solution is related to the length of optical path and the concentration of the solution
B. 目镜、玻璃管和气泡都影响视场Eyepiece, glass tube and bubble all affect the field of view
C. 旋光计最小刻度是0.01°The minimum scale of polarimeter is 0.01 degree
D. 理论上明视场和暗视场都可作为初始值，但用暗场更易区分Theoretically, both the bright and the dark fields can be used as the initial values, but the dark field is easier to distinguish
用分光计测量光波长时，下列说法错误的是？When measuring light wavelength with spectrometer, what is wrong with the following statement?
A. 分光计调整时，绿十字像的成像原理与模拟眼实验中光路自准直法的原理不同When the spectrometer is adjusted, the imaging principle of the Green Cross image is different from that of the light path autocollimation method in the simulated eye experiment
B. 一级衍射光谱线和二级衍射光谱线对应的光栅常数相同The grating constants corresponding to the first and second order diffraction lines are the same
C. 汞光灯和钠光灯产生的光谱波长不同The spectral wavelengths of mercury lamp and sodium lamp are different
D. 角度差计算时，需注意转角过0°（或360°）的问题，不能直接相减When calculating the angle difference, attention should be paid to the problem that the angle difference exceeds 0 ° or 360 ° and the angle difference cannot be directly reduced
关于人耳听阈实验，下列说法正确的是？About the human ear hearing threshold experiment, which of the following is correct?
A. 声强级和响度级都是描述声音的参数，因此二者是同一测量结果的不同说法Both sound intensity level and loudness level are parameters describing sound, so they are different opinions for the same measurement result
B. 每个人的听力情况不一致，因此每个人的听阈曲线也有差别Each person\'s hearing condition is not consistent, therefore each person\'s hearing threshold curve also has the difference
C. 左耳和右耳的听阈曲线一样The hearing threshold curve of the left ear is the same as that of the right ear
D. 测量时两人需交替戴上耳机、测量数据，然后汇总数据During the measurement, the two people need to wear headphones alternately, measure the data, and then summarize the data
以下操作或说法错误的是？Which of the following operations or statements is wrong?
A. 不可将液体吸入橡皮管中Do not inhale liquid into the rubber tube
B. 实验时，奥氏粘度计中不同液体毛细管压强差之比等于密度之比In the experiment, the ratio of capillary pressure difference of different liquids is equal to the ratio of density
C. 液体温度在实验中要尽量保持不变，因为黏度系数大小和温度有关The liquid temperature should be kept as constant as possible in the experiment, because the viscosity coefficient is related to the temperature
D. 注入奥氏粘度计液体的液面应在大泡的上端，超过大泡的高度The liquid level of the liquid injected into the austenite viscometer should be at the upper end of the big bubble and exceed the height of the bubble
用正交方向曲率不等的凸柱面透镜模拟散光眼，其正交方向焦距分别为f =26.6cm、F=40.0cm。则应该给该“散光眼”配什么样的透镜？A convex cylindrical lens with different curvature in orthogonal direction is used to simulate astigmatism. The focal length in orthogonal direction is f = 26.6cm and F = 40.0cm respectively. What kind of lens should be used for the astigmatism eye?
A. 焦距为-40cm的凹圆柱透镜Concave cylindrical lens with focal length of - 40cm
B. 焦距为+80cm的凸圆柱透镜Convex cylindrical lens with focal length of + 80cm
C. 焦距为+80cm的凸透镜Convex lens with focal length of + 80cm
D. 焦距为+40cm的凸圆柱透镜Convex cylindrical lens with focal length of + 40cm
以下说法正确的是？Which of the following statements is true?
A. 除了尽量选择准确度级别高的仪表外，选择较小的量程一定可以减小测量的误差。In addition to selecting the instrument with high accuracy level as far as possible, choosing a smaller range must certainly reduce the measurement error.
B. 测量某物体长度的平均值为1.000m，绝对误差为1mm，测另一物体长度的平均值为1.0cm绝对误差也为1 mm，两者测量的准确程度相同。The average value of measuring the length of an object is 1.000m, the absolute error is 1mm, the average value of measuring the length of another object is 1.0cm, and the absolute error is 1 mm. The accuracy degree of both measurements is the same.
C. 长度为L=7.04±0.06cm，它表示L在7.04附近正、负0.06cm的范围内包含真值的一定的可能性（几率）。The length is L = 7.04 ± 0.06cm, which indicates the possibility (probability) that L contains the true value in the range of positive and negative 0.06cm near 7.04.
D. 在仪表的指示数及量程均相同的条件下，虽然仪表的级别不同，但测量结果的可疑位、误差及最后读数均相同。Under the condition that the indication number and range of the instrument are the same, although the level of the instrument is different, the suspicious bit, error and final reading of the measurement result are the same.
拉脱法测定液体表面张力系数时，影响实验结果的主要因素有哪些？What are the main factors that affect the experimental results when the liquid surface tension coefficient is measured by pull-out method？
A. 与液面接触金属框的水平度Levelness of metal frame in contact with liquid surface
B. 液体的温度变化Temperature change of liquid
C. 砝码盘的水平度Levelness of the weight plate
D. 金属框的干净程度Cleanliness of metal frames
空气中超声声速测定实验时，下列选项有误的是：What is wrong with the following options in the experiment of ultrasonic velocity measurement in air?
A. 信号源频率设定大约为3700HzThe signal source frequency is set at about 3700hz
B. 数据用逐差法处理可以充分利用数据并减少误差The data can be processed by the method of successive difference, which can make full use of the data and reduce the error
C. 通道1和通道2输入信号的差别主要在于相位，其振幅几乎没有变化The difference between channel 1 and channel 2 input signals is mainly due to the phase, and the amplitude of channel 1 and channel 2 is almost unchanged
D. 测量时，超声探头接收器每次的移动方向要一致。可以从近往远移，也可以从远往近移，沿一个方向移动可以消除螺距引起的误差During the measurement, the moving direction of the ultrasonic probe receiver should be consistent each time. It can be moved from near to far or from far to near. The error caused by pitch can be eliminated by moving in one direction
以下有效数字错误的是？What are the wrong significant digits ?