Doctors have known for a long time that extremely loud noises can cause hearing damage or loss. The noise can be the sound of a jet airplane or machines in factories of loud music or other common sound at home and at work. A person only needs to hear the noise for little more 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 using a number of students at a university who all had normal hearing. He gave them different amounts of aspirin for different periods of time, then he tested their hearing ability. He found that students who were given four grams of aspirin a day for two days suffered much greater temporary hearing loss than those who did not use aspirin. The hearing loss was about two times as great.

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

1.Doctors have long known that__________.

2.This passage suggests that one’s hearing________.

3.One conclusion you can draw from the passage is that aspirin________.

4.Millions of Americans are in danger of suffering hearing loss because they__________.

5.The American scientist did his experiment in order to find ________.

Doctors have known for a long time that extremely loud noises can cause hearing damage or loss．The noise can be the sound of a jet airplane or machines in factories of loud music or other common sound at home and at work．A person only needs to hear the noise for little more 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 using a number of students at a university who all had normal hearing．He gave them different amounts of aspirin for different periods of time, then he tested their hearing ability．He found that students who were given four grams of aspirin a day for two days suffered much greater temporary hearing loss than those who did not use aspirin．The hearing loss was about two times as great．

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

1．Doctors have long known that__________．

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

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

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

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

2．This passage suggests that one’s hearing________．

A．will be damaged even if he has heard a loud noise for only little more than one second

B．will be damaged even if he has heard a loud noise less than one second

C．will not be damaged if he has heard a loud noise for only little more than one second

D．will not be damaged if he has little more than one second to get ready

3．One conclusion you can draw from the passage is 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 given more than four grams daily

D．always increases hearing loss by two times

4．Millions of Americans are in danger of suffering hearing loss because they__________．

A．take too much aspirin            

B．often take air trips

C．like listening to loud music       

D．have too much loud noises at home and at work

5．The American scientist 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 the treatment of the patients with hearing damage from loud noise

C．whether aspirin would increase the temporary hearing damage from loud noises

D．whether the people who had hearing damage should use aspirin

Doctors have known for a long time that extremely loud noises can cause hearing damage or loss.The noise can be the sound of a jet airplane or machines in factories of loud music or other common sound at home and at work. A person only needs to hear the noise 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 using a number of students at a university who all had normal hearing. He gave them different amounts of aspirin for different periods of time, then he tested their hearing ability. He found that students who were given four grams of aspirin a day for two days suffered much greater temporary hearing loss than those who did not use aspirin. The hearing loss was about two times as great.
The scientist said millions of persons in the U.S. use much larger amounts of aspirin than were used in his experiment. He said these persons face a serious danger of suffering hearing loss from loud noise.
【小题1】.
.Doctors have long known that__________.

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

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

C．whether aspirin would increase the temporary hearing damage from loud noises

D．whether the people who had hearing damage should use aspirin

Doctors have known for a long time that extremely loud noises can cause hearing damage or loss.The noise can be the sound of a jet airplane or machines in factories of loud music or other common sound at home and at work. A person only needs to hear the noise 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 using a number of students at a university who all had normal hearing. He gave them different amounts of aspirin for different periods of time, then he tested their hearing ability. He found that students who were given four grams of aspirin a day for two days suffered much greater temporary hearing loss than those who did not use aspirin. The hearing loss was about two times as great.

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

1..

 .Doctors have long known that__________.

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

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

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

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

2..

.One conclusion you can draw from the passage is 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 given more than four grams daily

D. always increases hearing loss by two times

3..

. The American scientist 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 the treatment of the patients with hearing damage from loud noise

C.whether aspirin would increase the temporary hearing damage from loud noises

D.whether the people who had hearing damage should use aspirin

Some scientists say that animals in the ocean are increasingly threatened by noise pollution caused by human beings. The noise that affect sea creatures comes from a number of human activities. It is caused mainly by industrial underwater explosions, ocean drilling, and ship engines. Such noises are added to natural sounds. These sounds include the breaking of ice fields, underwater earthquakes, and sounds made by animals themselves.

Decibels（分贝）measured in water are different from those measured on land. A noise of one hundred and twenty decibels on land causes pain to human ears. In water, a decibel level of one hundred and ninety-five would have the same effect.

Some scientists have proposed setting a noise limit of one hundred and twenty decibels in oceans. They have observed that noises at that level can frighten and confuse whales.

A team of American and Canadian scientists discovered that loud noises can seriously injure some animals. The research team found that powerful underwater explosions were causing whales in the area to lose their hearing. This seriously affected the whales’ ability to exchange information and find their way. Some of the whales even died. The explosions had caused their ears to bleed and become infected.

Many researchers whose work depends on ocean sounds object to a limit of one hundred and twenty decibels. They say such a limit would mean an end to important industrial and scientific research.

Scientists do not know how much and what kinds of noises are harmful to ocean animals. However, many scientists suspect that noise is a greater danger than they believed. They want to prevent noises from harming creatures in the ocean.

1.According to the passage, which of the following is increasingly dangerous to sea creatures?

A. The man-made noises.

B. The noises made by themselves.

C. The sound of earthquakes.

D. The sound of the ice-breaking.

2.As to the influence of noises on whales, which of the following statements is true?

A. They are deaf to noises.

B. Noises at a certain level may hurt them.

C. They are easily confused by noises.

D. Noises will limit their ability to reproduce.

3. We can know from the passage that many scientists think that the noise limit of one hundred twenty decibels would______.

A. prevent them from doing their research work

B. benefit them a lot in their research work

C. do good to their health

D. increase the industrial output

4.According to the passage, what will scientists most probably do in the future?

A. They will try their best to decrease noise.

B. They will work hard to cut down noise pollution.

C. They will study the effect of different noises.

D. They will protect animals from harmful noises.