Noise can produce serious ______ stress.

From Paragraph 2, it can be inferred that

A．Independence Day marks the beginning of peak season for theme parks.

B．mature markets of North America and Europe are slowly losing the edge.

C．theme parks in Asia produce larger revenue than their American counterparts.

D．theme parks can hardly expect a jump in entry prices due to the competition.

is considered a form. of pollution. Noise pollution is at its worst in densely polluted areas. It can cause hearing loss, stress, high blood pressure, sleep loss, distraction, and lost productivity.

Most humans can hear sounds between 20 and 20,000 hertz, while dogs can hear high-pitched sounds up to 50,000 hertz. While high frequency sounds tend to be more hazardous and more annoying to hearing than low frequency sounds, most noise pollution damage is related to the intensity of the sound. Measured in decibels, noise intensity can range from zero, the quietest sound the human ear can detect, to over 160 decibels. Conversation takes place at around 40 decibels, a subway train is about 80 decibels, and a rock concert is from 80 to 100 decibels. The intensity of a nearby jet taking off is about 100 decibels. The threshold for pain, tissue damage and potential hearing loss in humans is 120 decibels. Long lasting, high intensity sounds are the most damaging to hearing and produce the most stress in humans.

Solutions to noise pollution include adding insulation and sound proofing to doors, walls and ceilings; using ear protection, particularly in industrial working areas; planting vegetation to absorb and screen out noise pollution; and zoning urban areas to maintain a separation between residential areas and zones of excessive noise.

According to the passage, intense noise pollution may NOT cause

A．hearing loss.

B．high blood pressure.

C．lost productivity.

D．poor appetite.

y, is considered a form. of pollution. Noise pollution is at its worst in densely polluted areas. It can cause hearing loss, stress, high blood pressure, sleep loss, distraction, and lost productivity.

Most humans can hear sounds between 20 and 20,000 hertz, while dogs can hear high-pitched sounds up to 50,000 hertz. While high frequency sounds tend to be more hazardous and more annoying to hearing than low frequency sounds, most noise pollution damage is related to the intensity of the sound. Measured in decibels, noise intensity can range from zero, the quietest sound the human ear can detect, to over 160 decibels. Conversation takes place at around 40 decibels, a subway train is about 80 decibels, and a rock concert is from 80 to 100 decibels. The intensity of a nearby jet taking off is about 100 decibels. The threshold for pain, tissue damage and potential hearing loss in humans is 120 decibels. Long lasting, high intensity sounds are the most damaging to hearing and produce the most stress in humans.

Solutions to noise pollution include adding insulation and sound proofing to doors, walls, and ceilings; using ear protection, particularly in industrial working areas; planting vegetation to absorb and screen out noise pollution; and zoning urban areas to maintain a separation between residential areas and zones of excessive noise.

According to the passage, intense noise pollution may NOT cause ______ .

A．hearing loss

B．high blood pressure

C．lost productivity

D．poor appetite

nery, is considered a form. of pollution. Noise pollution is at its worst in densely populated areas. It can cause hearing loss, stress, high blood pressure, sleep loss, distraction (注意力分散), and lost productivity!

Sounds are produced, by objects that vibrate (振动), at a rate that the ear can detect. This rate is called frequency and is measured in hertz (赫兹), or vibrations per second. Most humans can hear sounds between 20 and 20,000 hertz, while dogs can hear high pitched sounds (高频声音) up to 50,000 hertz. While high frequency sounds tend to be more hazardous (危险的) and more annoying to heating than low frequency sounds, most noise pollution damage is related to the intensity of the sound. Measured in decibels (分贝), noise intensity can range from zero, the quietest sound the human ear can detect, to over 60 decibels. Conversation takes place at around 40 decibels, a subway train is about 80 decibels, and a rock concert is from 80 to 100 decibels. The intensity of a nearby jet taking off is about 110 decibels. 120 decibels axe the limit at which human beings will be aware of pain, and suffer from potential heating loss. Long lasting, high intensity sounds are the most damaging to heating and produce the most stress in humans.

Solutions to noise pollution include adding insulation and sound proofing (隔音) to doors, walls, and ceilings; using ear protection, particularly in industrial working areas; planting vegetation to absorb and screen out noise pollution; and zoning urban areas to maintain a separation between residential areas and zones of excessive noise.

Noise pollution can cause ______.

A．lower productivity

B．lower blood pressure

C．sound sleep

D．less stress

y, is considered a form. of pollution. Noise pollution is at its worst in densely polluted areas. It can cause hearing loss, stress, high blood pressure, sleep loss, distraction, and lost productivity.

Most humans can hear sounds between 20 and 20,000 hertz, while dogs can hear high-pitched sounds up to 50,000 hertz. While high frequency sounds tend to be more hazardous and more annoying to heating than low frequency sounds, most noise pollution damage is related to the intensity of the sound. Measured in decibels, noise intensity can range from zero, the quietest sound the human ear can detect, to over 160 decibels. Conversation takes place at around 40 decibels, a subway train is about 80 decibels, and a rock concert is from 80 to 100 decibels. The intensity of a nearby jet taking off is about 100 decibels. The threshold for pain, tissue damage and potential hearing loss in humans is 120 decibels. Long lasting, high intensity sounds are the most damaging to hearing and produce the most stress in humans.

Solutions to noise pollution include adding insulation and sound proofing to doors, walls, and ceilings; using ear protection, particularly in industrial working areas; planting vegetation to absorb and screen out noise pollution; and zoning urban areas to maintain a separation between residential areas and zones of excessive noise.

According to the passage, intense noise pollution may NOT cause ______.

A．hearing loss

B．high blood pressure

C．lost productivity

D．poor appetite

根据以下材料，回答题

The Magic of Sound

Music is one of the most beautiful forms of artistic expressions ever invented. In movies and plays， music has an added function: it not only moves people but also can shock people. Is it true that an ordinary musical instrument can be so powerful？

Our eardrums can withstand sound within 20 to 80 decibels. Once sound exceeds this limit，even beautiful music will become ear-splitting noise and harm health. A strong blast of high sound can twist and break a solid iron sheet. __________ （46）

The noise from a plane"s engine is over 140 decibels. However， the sound of a flute is at most a few decibels. __________ （47） It has been proven that people who have worked in an environment with a high sound intensity for a long time suffer varying degrees of heart disease or altered brain waves.

In movies， sometimes the hero can produce a sound that ordinary people can"t hear and only those who have the same ability can feel. In nature， there is actually sound that is beyond our hearing. In physics， the sound that exceeds 20，000 Hz is called ultrasonic. __________ （48） It does no harm to health.

Sound less than 20 Hz is called infrasonic waves. When we move， the air will vibrate. __________ （49）

As the frequency of infrasonic waves is close to that of people"s internal organs， infrasonic wave may cause resonance in human bodies. As a result， people"s vision may weaken and internal organs may rupture. However， whether an infrasonic wave can be used as a weapon depends on its intensity. If its intensity is very low， it won"t damage internal organs or a person"s health. __________ （50） When wind blows at a force of 3 or 4 over the sea， it will produce infrasonic waves of several decibels.

Only typhoons can produce infrasonic waves of over 100 decibels. At present scientist can only produce infrasonic weapons in the lab with the help of advanced scientific tools and powerful electric power.

回答（46）题 查看材料

A.High sound of 150 decibels can kill a healthy rat.

B.The vibration of air can produce infrasonic waves.

C.We cannot play high-pitched music with ordinary musical instruments.

D.If the intensity of infrasonic wave exceeds 160 decibels， it is extremely harmful.

E.Dolphins， whales and bats can make such high-frequency sound.

F.Therefore， the sound of ordinary musical instruments cannot harm your health.

e now suffer from deafness from regularly going to discos where the level of noise is so high that they have to shout to make themselves heard. Unfortunately, in spite of modern technology, noise is very much part of our modern world planes flying overhead, traffic thundering along busy roads, television, portable radios, all produce noise to which we have become so accustomed that we hardly notice it. In fact people going on country holidays have been known to complain that it is too quiet. They actually miss the noise they are used to in their daily lives. The problem is that noise, though it does not necessarily cause deafness, causes anxiety and this can in the long run prove harmful. However, the decision about more or less noise cannot be left to the scientists alone. It is up to us to decide what kind of world we want to live in.

Noise is sure to lead to ______ in the long run according to the article.

A．the loss of listening ability

B．the loss of sight

C．excessive excitement

D．the loss of health

根据以下内容回答题：

Research has shown that excessive noise（1）people’S hearing．In fact，many young people now suffer from deafness from regularly going to discos where the（2）of noise is so high that they have to shout to make themselves（3）．Unfortunately，in spite of modem（4），noise is a very much part of our modem world．Planes flying overhead，traffic thundering along busy roads，television，portable radios，all produce noise（5）which we have become so accustomed that we hardly（6）it．In fact，people going on country holidays have been known to complain that it is too quiet，they actually miss the noises they are used to in their daily lives．The problem is that noise，though it does not necessarily cause deafness，causes（7）and this can（8）the long run prove harmful．（9），the decision about more or less noise cannot be left to the scientists alone．It is（10）to us to decide what kind of world we want to live in．

1.

A.spoils

B.damagest

C.ruins

D.destroys

can be done to reduce the severity of the problem. For example, vehicles and other machines can be built to produce less noise. Four-cycle engines can replace much noisier two-cycle engines in such products as lawnmowers, motorboats, and jet skis. Labels that indicate the noise levels of appliances and tools can help consumers avoid noisy products and choose quieter alternatives.

Even after noise is generated, steps can be taken to reduce human exposure to it. At homes or in offices, insulation of walls and double-glazing of windows can decrease sound from traffic, neighbors, and other sources from the outside world. Sound walls along highways can shield nearby neighborhoods from traffic noise. Individuals should protect themselves with earplugs or ear protectors, particularly when noise levels exceed 85 decibels (分贝).

In the industrialized nations, governments have laws and policies to counter noise pollution. In the United States, at least six federal agencies are involved in controlling noise pollution. Since 1969 the Federal Aviation Administration (FAA) has monitored and controlled noise from airplanes, The agency requires that new aircraft meet specified noise standards and that old ones be retrofitted (翻新) or retired. Local airport authorities, with FAA approval, reduce the impacts of noise pollution by routing flights over water or unpopulated areas on takeoff and landing, and by limiting traffic at night. The FAA also encourages airports and local governments to take steps on the ground, such as constructing sound barriers, insulating buildings, and restricting residential development in noisy areas. In extreme eases, airports have relocated people living under flight paths.

In the last 30 years, the United States and other countries have expended considerable efforts to control noise pollution. Most vehicles and many other noise producers are quieter than they used to be. On the other hand, there are more noise-making machines than ever, operating mare of the time. In the United States, most of the roles governing noise pollution were established at least two decades ago, and critics are calling for new, stronger measures, as well as for better enforcement of the old ones. What is true of most other kinds of pollution is also true of noise: Our best efforts against it tend merely to keep matters from getting dramatically worse.

The first paragraph tries to tell us how to control noise pollution by ______.

A．taking measures to reduce human exposure to noise

B．using or replacing with quieter products

C．appealing to Government to set up laws

D．people's serf consciousness

Music

Music is one of the most beautiful forms of artistic expressions ever invented. In movies and plays, music has an added function: it not only moves people but also can shock people.

Our eardrums can withstand sound within 20 to 80 decibels (分贝 ) . Once sound exceeds this limit, even beautiful music will become car-splitting noise and harm health. A strong blast (响声 ) of high sound can twist and break a solid iron sheet. High sound of 150 decibels can kill a healthy rat.

In movies, sometimes the hero can produce a sound that ordinary people can&39;t hear and only those who have the same ability can feel. In nature, there is actually sound that is beyond our hearing. In physics, the sound that exceeds 20,000 hz is called ultrasonic (超音波的). Dolphins, whales and bats can make such high-frequency sound. It does no harm to health.

Sound less than 20 hz is called infrasonic (次声 ) waves. When we move, the air will vibrate.

The vibration of air can produce infrasonic waves. As the frequency of infrasonic waves is close to that of people&39;s internal organs, infrasonic wave may cause resonance (共振) in human bodies. As a result, people&39;s vision may weaken and internal organs may rupture (断裂). However, whether an infrasonic wave can be used as a weapon depends on its intensity. If its intensity is very low, it won&39;t damage internal organs or a person&39;s health. If the intensity of infrasonic wave exceeds 160 decibels, it is extremely harmful. When wind blows at a force of 3 or 4 over the sea, it will produce infrasonic waves of several decibels. Only typhoons can produce infrasonic waves of over 100 decibels. At present, scientists can only produce infrasonic weapons in the lab with the help of advanced scientific tools and powerful electric power.

What could be the best title of the passage？ 查看材料

A.The power of music

B.The harms of noises

C.The magic of sound

D.The discovery of infrasonic waves