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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.
We can conclude from the passage that we need to control noise pollution if________.
选项 A、we want to stay both psychologically and physically healthy
B、we don’t want to be physically hurt
C、we want to cooperate well
D、we don’t want to be anxious
答案A
解析 根据最后一段最后一句“It is noise pollution that we need to control in order to help people live more happily. ”可知，为了帮助人们生活得更快乐，我们需要控制的正是噪音污染。由此可推知，如果我们想保持心理和身体健康，我们需要控制噪音污染。B项(我们不想损害身体)、C项(我们想好好合作)和D项(我们不想焦虑)均不能完全概括需要控制噪音污染的原因。故选A。
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