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"分贝"相关考试题目
1.
分贝的定义是()
2.
“Millions of young people will lose their hearing in five years if they listen to MP3 or MP4 players at a too high voice every day,” scientists say recently. Do you often listen to MP3 players at a to...
3.
Do you know the difference between "sound" and "noise" "Noise" is an unwanted sound, such as (67) produced by airplanes, traffic, or industrial machinery... You may probably (68) people saying, "Ther...
4.
分贝
5.
分贝的定义是
6.
Do you know the difference between "sound" and "noise" "Noise" is an unwanted sound, such as (67) produced by airplanes, traffic, or industrial machinery... You may probably (68) people saying, "Ther...
7.
关于分贝的坐标是（ ）。
8.
[名词解释] 分贝
9.
（ 听力SectionC ）The people who lived in Rome two thousand years ago were already complaining about the noise in their city. They couldn’t sleep, they said, with all that traffic in the streets. For them...
10.
分贝用()代表。
11.
485WKM1MPG的噪音值（）分贝。
12.
Do you know the difference between "sound" and "noise" "Noise" is an unwanted sound, such as (67) produced by airplanes, traffic, or industrial machinery... You may probably (68) people saying, "Ther...
13.
Listening to an Ipod, playing loud video games and going to see the movies are harmful to your hearing. ___71____ Block(堵住)，walk and turn—that’s what hearing scientists want you to do when you face a ...
14.
0分贝
15.
The roar of the crowd combined with the speaker’s own low-decibel (分贝) delivery ensured that few could hear anything he said.
16.
阅读理解 Some scientists say that animals in the ocean are increasingly threatened by noise pollution caused by human beings. The noise that affects sea creatures comes from a number of human activitie...
17.
听力测试为85分贝,其听力残疾应为()
18.
分贝
19.
用2.5MHZ.Φ20mm直探头探伤,•试求200mm处Φ5平底孔与30mm处Φ2平底孔的分贝差（）。
20.
增益80分贝是（ ）
21.
Do you know the difference between "sound" and "noise" "Noise" is an unwanted sound, such as (67) produced by airplanes, traffic, or industrial machinery... You may probably (68) people saying, "Ther...
22.
声压值20000μPa与声压值200μPa的分贝差是多少()。
23.
[名词解释] 分贝/倍频程
24.
分贝的定义是
25.
分贝：声音
26.
奈培与分贝的对应关系是（）。
27.
Our sense of hearing is one of the most important means of knowing what is going on around us. We are warned of danger by sounds. The sounds of music please us. Sound has a waste product, too, in the ...
28.
分贝的定义是 。(x0是参考值)
29.
Do you know the difference between "sound" and "noise" "Noise" is an unwanted sound, such as (67) produced by airplanes, traffic, or industrial machinery... You may probably (68) people saying, "Ther...
30.
Do you know the difference between "sound" and "noise" "Noise" is an unwanted sound, such as (67) produced by airplanes, traffic, or industrial machinery... You may probably (68) people saying, "Ther...
31.
分贝的定义是（）。
32.
分贝的定义是
33.
用2.5MHz，Φ20mm直探头探伤，试求200mm处Φ5平底孔与300mm处Φ2平底孔的分贝差。
34.
Someone is singing next door, but you feel unhappy because her singing is terrible. So you think she is just making noise. We know that too much noise makes people feel terrible.Scientists are still t...
35.
The decibel(分贝)is one tenth of a bel, ______ named after Alexander Graham Bell.
36.
（ ）的单位是分贝。
37.
Some scientists say that animals in the ocean are increasingly threatened by noise pollution caused by human beings. The noise that affect sea creatures comes from a number of human activities. It is ...
38.
用2.5 MHz、φ20mm直探头探伤，试求200mm处φ5平底孔与30mm处φ2平底孔的分贝差（ ）。
39.
关于分贝下列叙述正确的是( )。
40.
很静、几乎感觉不到的分贝是()
41.
分贝标度
42.
设测量电压时的相对误差的γ，则其分贝误差γ[dB]=()。A.201gγB.201g(1+γ)C.101gγD.101g(1+γ)
43.
分贝是用来计量___________的．
44.
分贝和奈培都是同纲量的（）的单位。
45.
001的分贝值为（）
46.
Noise Pollution Psychologists now believe that noise has a considerable effect on people’s attitudes and behavior. Experiments have proved that in noisy situations (even temporary ones), people would ...
47.
电平的单位是分贝。
48.
Do you know the difference between "sound" and "noise" "Noise" is an unwanted sound, such as (67) produced by airplanes, traffic, or industrial machinery... You may probably (68) people saying, "Ther...
49.
用2.5MHz，Φ20mm直探头探伤，试求200mm处Φ5平底孔与300mm处Φ2平底孔的分贝差。
50.
Do you know the difference between "sound" and "noise" "Noise" is an unwanted sound, such as (67) produced by airplanes, traffic, or industrial machinery... You may probably (68) people saying, "Ther...
