Racket,din clamor,noise.Whatever you want to call it, unwanted sound is America,s most widespread nuisance.But noise is more th

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问题 Racket,din clamor,noise.Whatever you want to call it,  unwanted sound is America,s most widespread nuisance.But noise is more than just a nuisance.It constitutes a real and present danger to people’s health.Day and night,at home,at work,and at play,noise can produce serious physical and psychological stress.
No one is immune tothis stress.Though we.seem to adj ust to noise by ignoring it,the ear,in fact,never closes and the bodv still responds--sometimes with extreme tension,as to a strange sound in the night. The annoyance we feel when faced with noise is the most common outward svmptom of the stress building up inside us.Indeed,because irritability is so apparent,legislators have made public annoyance the basis of many noise abatement(消除)programs.The more subtle and more serious health hazards associated with stress caused by noise traditionallv have been given much less attention.Nevertheless,when we are annoyed or made irritable by noise,we should consider these symptoms fair warning that other things may be happening to us。some of which may be damaging to our health. Of the many health hazards related to noise,hearing loss is the most clearly observable and measurable by health professionals.
Other hazards are harder to pin down.For manv of us. there may be a risk that exposure to the stress of noise increases suseeptibilitv t0 disease and infection.The more susceptible among us may experience noise as a complicating factor in heart problems and other diseases.Noise that causes annoyance and irritability in healthy persons may have serious consequences for those already ill in mind or body. Noise affects us throughout our lives.For example,there are indications of effects on the unborn child when mothers are exposed to industrial and environmental noise.During infancy and childhood,youngsters exposed to high noise levels may have trouble falling asleep and obtaining necessary amounts of rest.
  Why,then,is there not greater alarm about these dangers?PerhaPs it is because the link between noise and many disabilities or diseases has not yet been conclusivelv demonstrated.Perhaps it is because we tend to dismiss annoyance as a price to pay for living in the modern world.It may also be because we stilI think of hearing loss as only an occupational hazard.
The author would probably consider research about the effects noise has on people to be________.

选项 A、unimportant
B、impossible
C、a waste of money
D、essential

答案D

解析 推断题。全文都在谈论噪音对人健康的危害,但人们并没有意识到这一点,所以可以推断,作者认为对噪音的影响的研究是非常必要的,所以D正确。
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