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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 expecting to hear airplanes taking off and landing________.
选项 A、hate waiting at the airport
B、are usually not troubled by the noise
C、can easily tell sound from noise
D、are often physically affected by the noise
答案B
解析 根据第二段倒数第三句“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). ”可知，对于在机场预计会听到飞机起飞和降落的乘客来说，可能会有很多声音，但不会有太多的噪音(也就是说，他们没有被噪音干扰)。故选B。
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