Noise Pollution Psychologists now believe that noise has a considerable effect on people’s attitudes and behavior. Experimen

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问题                        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 have more irritability (暴躁易怒) and less cooperation. In more permanent noisy situations, many people cannot work hard, and they suffer from severe anxiety as well as other psychological problems. Some researchers, who study various aspects of effect of noise in people’s mental life, maintain that noise, either temporary noise or permanent noise, often destroy creativity and activity by disturbing people’s emotion and make them more irritable and hard to cooperate.
    However, psychologists distinguish between " sound" and " noise" . " Sound" is measured physically in decibels (分贝). "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 if the person has control over the sound. People walking down the street with earphones, listening to music that they enjoy, are receiving a lot of decibels of sound, but they are probably happy hearing sounds which 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.
"Sound" , as defined by the psychologist, ______.

选项 A、can be measured in the same way that "noise" is measured
B、may be extremely harmful to health
C、is not at all different from "noise"
D、can be measured by machines

答案D

解析 细节题。依据是第二段的第二句:“Sound”is measured physically in decibels(分贝)。声音可以用机器测量, 而噪音则不行, 所以正确答案是D, 同时排除A。文章第二段第一句就提到:However, psych010gists distinguish between“sound”and“noise”.即声音和噪音是有区剐的, 排除C。选项B文中未提及。
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