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  3. Researches have shown that noise can adversely affect human in both physiological and psychological ways. Hearing losses in part

Researches have shown that noise can adversely affect human in both physiological and psychological ways. Hearing losses in part

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问题     Researches have shown that noise can adversely affect human in both physiological and psychological ways. Hearing losses in particular occupations such as shipbuilding and construction work are well known. In fact, however, we all find hearing more difficult as we age. Young ears can distinguish a wide range of sounds from low to very high frequencies, while older ears lose the ability to distinguish high-pitched sounds. A comparison of people living in some industrialized and non-industrialized areas suggests that this hearing loss may not necessarily accompany old age.
    Furthermore, a closer inspection of other data reveals economic effects. For instance an increased turnover in property has been observed in noisy areas near airports. Job performance can be adversely affected by loud noise, especially if accuracy and mental effort are involved. The use of outdoor areas for conversation is not possible for an estimated 5 to 10 million people who live or work in urban areas. When interference with television or speech or sleep is included, as many as 22 to 44 million people can be said to have lost part of the use of their homes and grounds because of noise.
    Thus noise pollution is a serious environmental concern. The indifferent attitude toward noise should be overcome; considerable efforts should be made to alert people to the grave effects that may stem from an excessively noisy environment.
The last paragraph implies that______.
选项 A、people are generally concerned about noise pollution
B、many people haven’t yet realized the adverse effects of noise pollution
C、people are making efforts to overcome the noise problem
D、people are alert to excessively noisy environment
答案B
解析 最后一段讲到：噪音污染是一个严重的环境问题。那种漠不关心的态度应该被克服。因此可以得出B项为正确答案“很多人还没有意识到噪音污染带来的种种危害”。
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