passage 2
Researchers have shown that noise can adversely affect humans in both physiological and psychological ways. hearing losses in particular occupations such as ship-building 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(高音). 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(周转，易手) 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(户外的) areas for conversation is not possible for an estimated 5 to 10 million people who live or work in urban area. when interference with television or speech or sleep is included, as many as 22 to 24 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 which may stem from an excessively noisy environment.
4) we can learn from this passage that __________.
a. young people are able to distinguish high-pitched sounds
b. young people distinguish low frequency noise better than old people
c. high frequency noise can cause hearing loss in old people
d. industrialized people will suffer hearing loss when they are old
5) according to the text, noise can interfere with sleep. which of the following statements does this imply? __________
a. noise can cause dreams.
b. noise makes people turn round in their sleep.
c. noise makes people sleep more.
d. noise interrupts sleep.
6) the grave effects of noise on humans are __________.
a. physiological only
b. psychological only
c. psychological, physiological and economic
d. both psychological and physiological
编辑推荐：
（责任编辑：）
