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  3. Psychologists now believe that noise has a considerable effect on people’s attitudes and behavior. Experiments have proved that

Psychologists now believe that noise has a considerable effect on people’s attitudes and behavior. Experiments have proved that

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问题     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 behave more irritably and less cooperatively; in more permanent noisy situations, many people cannot work hard, and they suffer from severe anxiety and other psychological problems.
    However, psychologists distinguish between "sound" and "noise". "Sound" is measured physically in decibels. "Noise" cannot be measured in the same way because it refers to the psychological effect of sound and its level of "intensity" depends on the situation. Thus, for passengers at an airport who expect to hear airplanes taking off and landing, there may be a lot of sound, but not much noise (that is, they are not bothered by the noise). By contrast, if you are at a concert and two people behind you are whispering, you feel they are talking noisily even if there is not much sound. You notice the noise because it affects you psychologically.
    Both sound and noise can have negative effects, but what is most important is whether the person has control over the sound. People walking down the street with earphones, listening to music that they enjoy, are receiving very high decibels of sound, but they are probably happy to hear the sound that they control. On the other hand, people in the street without earphones must tolerate a lot of noise which they have no control over. It is noise pollution that we need to control in order to help people live more happily.
People enjoy listening to music_________.
选项 A、though they are receiving a lot of decibels of sound in fact
B、because it does not have any negative effect
C、because they do not have to tolerate the noise around them
D、even though it is sometimes unpleasant
答案A
解析 根据最后一段第二句“People walking down the street with earphones, listening to music that they enjoy, are receiving very high decibels of sound, but they are probably happy to hear the sound that they control. ”可知，人们戴着耳机在街上走，听着他们喜欢的音乐，接收着很高分贝的声音，但他们很可能乐于听到自己控制的声音。故选A。
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