Doctors have known for a long time that extremely loud noises can cause hearing

Doctors have knownfor a long time that extremely loud noises can cause hearing damage or loss.Thenoise can be the sound of a jet airplane or machines in factories of loud musicor other common sound at home and at work. A person only needs to hear thenoise for little mire than one second to be affected.

An American scientist has found that using aspirin (阿斯匹林) increase the temporary (暂时的)hearing loss or damage from loud noise. He did an experiment usinga number of students at a university who all had normal hearing. He gave themdifferent amounts of aspirin for different periods of time, then he tested theirhearing ability. He found that students who were given four grams of aspirin aday for two days suffered much greater temporary hearing loss than those whodid not use aspirin. The hearing loss was about two times as great.

The scientist said millions of persons in the U.S. usemuch larger amounts of aspirin than were used in his experiment. He said thesepersons face a serious danger of suffering hearing loss from loud noise.

1..

 .Doctors havelong known that__________.

A. one may lose his hearing when he hears a terriblyloud noise.

B. one may become deaf when he hears a loud noise.

C.loud noises can cause damage to the hearingof the young people only

D. common sounds at home are not harmful to the ear

2..

.One conclusion you can draw from the passageis that aspirin________.

A. makes hearing damage from loud noise worse

B. should never be taken more than four grams

C.can damage one’s hearing when it is givenmore than four grams daily

D. always increases hearing loss by two times

3..

. The Americanscientist did his experiment in order to find ________.

A. how much aspirin would affect a person’s hearing

B. how much aspirin should be given in thetreatment of the patients with hearing damage from loud noise

C.whether aspirin would increase thetemporary hearing damage from loud noises

D.whether the people who had hearing damageshould use aspirin

试题答案

【答案】

1..A

2..A

3..A

【解析】 略