logo - 刷刷题
下载APP
【单选题】

ICU白天噪音最好是低于( )分贝

A.
25
B.
35
C.
45
D.
55
题目标签：分贝
举报
如何制作自己的在线小题库
参考答案：
参考解析：
.
刷刷题刷刷变学霸
举一反三

【简答题】“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...
查看完整题目与答案

【单选题】分贝的定义是
A.
两个声强的比值
B.
两个声强的和
C.
散射量
D.
声波的速度
E.
两个声强之差
查看完整题目与答案

【简答题】[名词解释] 分贝
查看完整题目与答案

【多选题】（ 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...
A.
merely
B.
average
C.
worsening
D.
the degree of loudness
E.
we are exposed
查看完整题目与答案

【单选题】分贝用()代表。
A.
AB
B.
FB
C.
dB
D.
KB
查看完整题目与答案

【单选题】485WKM1MPG的噪音值（）分贝。
A.
35
B.
36
C.
37
D.
38
查看完整题目与答案

【简答题】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...
查看完整题目与答案

【单选题】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（）。
A.
15dB
B.
20dB
C.
23dB
D.
26dB
查看完整题目与答案

【单选题】分贝的定义是 。(x0是参考值)
A.
B.
C.
D.
查看完整题目与答案

【单选题】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...
A.
essentially
B.
particularly
C.
obviously
D.
similarly
查看完整题目与答案

【简答题】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。
查看完整题目与答案

【单选题】The decibel(分贝)is one tenth of a bel, ______ named after Alexander Graham Bell.
A.
a unit
B.
is a unit
C.
a unit is
D.
a unit being
查看完整题目与答案

【单选题】（ ）的单位是分贝。
A.
声强
B.
声调
C.
音色
D.
音调
查看完整题目与答案

【简答题】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 ...
查看完整题目与答案

【单选题】很静、几乎感觉不到的分贝是()
A.
70—90分贝
B.
60—70分贝
C.
40—60分贝
D.
20—40分贝
E.
0—20分贝
查看完整题目与答案

【简答题】分贝和奈培都是同纲量的（）的单位。
查看完整题目与答案

【单选题】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 ...
A.
can not complete his work in a noisy situation
B.
will suffer from complete deafness because of noise pollution
C.
can be psychologically affected by working in very noisy factories
D.
may cooperate well in a noisy surrounding
查看完整题目与答案

【单选题】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...
A.
with
B.
in
C.
by
D.
for
查看完整题目与答案

【简答题】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。
查看完整题目与答案

【单选题】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...
A.
range
B.
change
C.
shift
D.
switch
查看完整题目与答案
相关题目：
查看完整题目与答案
【单选题】分贝的定义是
A.
两个声强的比值
B.
两个声强的和
C.
散射量
D.
声波的速度
E.
两个声强之差
查看完整题目与答案
查看完整题目与答案
查看完整题目与答案
【单选题】分贝用()代表。
A.
AB
B.
FB
C.
dB
D.
KB
查看完整题目与答案
查看完整题目与答案
查看完整题目与答案
查看完整题目与答案
查看完整题目与答案
查看完整题目与答案
查看完整题目与答案
查看完整题目与答案
【单选题】（ ）的单位是分贝。
A.
声强
B.
声调
C.
音色
D.
音调
查看完整题目与答案
查看完整题目与答案
【单选题】很静、几乎感觉不到的分贝是()
A.
70—90分贝
B.
60—70分贝
C.
40—60分贝
D.
20—40分贝
E.
0—20分贝
查看完整题目与答案
查看完整题目与答案
【单选题】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 ...
A.
can not complete his work in a noisy situation
B.
will suffer from complete deafness because of noise pollution
C.
can be psychologically affected by working in very noisy factories
D.
may cooperate well in a noisy surrounding
查看完整题目与答案
查看完整题目与答案
查看完整题目与答案
查看完整题目与答案