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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 sea6, 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.
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.
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【单选题】According to the passage, what is it that almost everyone does on Sunday() A．Reading the Sunday paper. B．Going to church. C．Sleeping late in the morning.
A.
Many people go to church on Sunday, but others don’t. Many sleep late on Sunday, but most don’t. However, almost everyone reads the Sunday paper.
B.
Often the paper is waiting outside the door when the family gets up. The newspaper boy has delivered it.
C.
The Sunday paper is usually very thick It has many advertisements and many different sections. The adults in the family like the front page, the editorial page, and the world news section. Many men also read the sports pages and the financial pages.
D.
Most men don’t read the women’s pages, but the mother of the family usually does. The women’s pages have news about parties and marriages, and advice about food, health, and clothes.
E.
Most Sunday papers have comics, which children enjoy. Older people read the death notices, which tell about people who have died during the week.
F.
There is something for everyone in the Sunday paper.
【单选题】7（） A. Provided that B. In that C. Now that D. Given that
A.
Advances in computers and data networks inspire visions of a future " information economy" in which everyone will have (1) to gigabytes of all kinds of information anywhere and anytime. (2) information has always been a (3) difficult commodity to deal with, and, in some ways, computers and high-speed networks make the problems of buying, (4) , and distributing information goods worse (5) better. The evolution of the Internet itself (6) serious problems. (7) the Internet has been privatized, several companies are (8) to provide the backbones that will carry traffic (9) local networks, but (10) business models for interconnection--who pays how much for each packet (11) , for example--have (12) to be developed. (13) interconnection standards are developed that make (14) cheap and easy to transmit information across independent networks, competition will (15) . If technical or economic (16) make interconnection difficult, (17) transmitting data across multiple networks is expensive or too slow, the (18) suppliers can offer a significant performance (19) ; they may be able to use this edge to drive out competitors and (20) the market.
【单选题】Imagine a chart that begins when man first appeared on the planet and tracks the economic growth of societies from then forward. It would be a long, flat line until the late 16th or early 17th century...
A.
Britain’s leadership in the Industrial Revolution
B.
The Industrial Revolution in countries like the U.S. and Germany
C.
Great development of some Eastern Asian countries
D.
The economic boom in Turkey and Brazil
【单选题】8（） A.competing B.struggling C.fighting D.contending
A.
Advances in computers and data networks inspire visions of a future " information economy" in which everyone will have (1) to gigabytes of all kinds of information anywhere and anytime. (2) information has always been a (3) difficult commodity to deal with, and, in some ways, computers and high-speed networks make the problems of buying, (4) , and distributing information goods worse (5) better. The evolution of the Internet itself (6) serious problems. (7) the Internet has been privatized, several companies are (8) to provide the backbones that will carry traffic (9) local networks, but (10) business models for interconnection--who pays how much for each packet (11) , for example--have (12) to be developed. (13) interconnection standards are developed that make (14) cheap and easy to transmit information across independent networks, competition will (15) . If technical or economic (16) make interconnection difficult, (17) transmitting data across multiple networks is expensive or too slow, the (18) suppliers can offer a significant performance (19) ; they may be able to use this edge to drive out competitors and (20) the market.
【单选题】19（） A.benefit B.drawback C.profit D.advantage
A.
Advances in computers and data networks inspire visions of a future " information economy" in which everyone will have (1) to gigabytes of all kinds of information anywhere and anytime. (2) information has always been a (3) difficult commodity to deal with, and, in some ways, computers and high-speed networks make the problems of buying, (4) , and distributing information goods worse (5) better. The evolution of the Internet itself (6) serious problems. (7) the Internet has been privatized, several companies are (8) to provide the backbones that will carry traffic (9) local networks, but (10) business models for interconnection--who pays how much for each packet (11) , for example--have (12) to be developed. (13) interconnection standards are developed that make (14) cheap and easy to transmit information across independent networks, competition will (15) . If technical or economic (16) make interconnection difficult, (17) transmitting data across multiple networks is expensive or too slow, the (18) suppliers can offer a significant performance (19) ; they may be able to use this edge to drive out competitors and (20) the market.
相关题目：
【单选题】According to the passage, what is it that almost everyone does on Sunday() A．Reading the Sunday paper. B．Going to church. C．Sleeping late in the morning.
A.
Many people go to church on Sunday, but others don’t. Many sleep late on Sunday, but most don’t. However, almost everyone reads the Sunday paper.
B.
Often the paper is waiting outside the door when the family gets up. The newspaper boy has delivered it.
C.
The Sunday paper is usually very thick It has many advertisements and many different sections. The adults in the family like the front page, the editorial page, and the world news section. Many men also read the sports pages and the financial pages.
D.
Most men don’t read the women’s pages, but the mother of the family usually does. The women’s pages have news about parties and marriages, and advice about food, health, and clothes.
E.
Most Sunday papers have comics, which children enjoy. Older people read the death notices, which tell about people who have died during the week.
F.
There is something for everyone in the Sunday paper.
【单选题】7（） A. Provided that B. In that C. Now that D. Given that
A.
Advances in computers and data networks inspire visions of a future " information economy" in which everyone will have (1) to gigabytes of all kinds of information anywhere and anytime. (2) information has always been a (3) difficult commodity to deal with, and, in some ways, computers and high-speed networks make the problems of buying, (4) , and distributing information goods worse (5) better. The evolution of the Internet itself (6) serious problems. (7) the Internet has been privatized, several companies are (8) to provide the backbones that will carry traffic (9) local networks, but (10) business models for interconnection--who pays how much for each packet (11) , for example--have (12) to be developed. (13) interconnection standards are developed that make (14) cheap and easy to transmit information across independent networks, competition will (15) . If technical or economic (16) make interconnection difficult, (17) transmitting data across multiple networks is expensive or too slow, the (18) suppliers can offer a significant performance (19) ; they may be able to use this edge to drive out competitors and (20) the market.
【单选题】Imagine a chart that begins when man first appeared on the planet and tracks the economic growth of societies from then forward. It would be a long, flat line until the late 16th or early 17th century...
A.
Britain’s leadership in the Industrial Revolution
B.
The Industrial Revolution in countries like the U.S. and Germany
C.
Great development of some Eastern Asian countries
D.
The economic boom in Turkey and Brazil
【单选题】8（） A.competing B.struggling C.fighting D.contending
A.
Advances in computers and data networks inspire visions of a future " information economy" in which everyone will have (1) to gigabytes of all kinds of information anywhere and anytime. (2) information has always been a (3) difficult commodity to deal with, and, in some ways, computers and high-speed networks make the problems of buying, (4) , and distributing information goods worse (5) better. The evolution of the Internet itself (6) serious problems. (7) the Internet has been privatized, several companies are (8) to provide the backbones that will carry traffic (9) local networks, but (10) business models for interconnection--who pays how much for each packet (11) , for example--have (12) to be developed. (13) interconnection standards are developed that make (14) cheap and easy to transmit information across independent networks, competition will (15) . If technical or economic (16) make interconnection difficult, (17) transmitting data across multiple networks is expensive or too slow, the (18) suppliers can offer a significant performance (19) ; they may be able to use this edge to drive out competitors and (20) the market.
【单选题】19（） A.benefit B.drawback C.profit D.advantage
A.
Advances in computers and data networks inspire visions of a future " information economy" in which everyone will have (1) to gigabytes of all kinds of information anywhere and anytime. (2) information has always been a (3) difficult commodity to deal with, and, in some ways, computers and high-speed networks make the problems of buying, (4) , and distributing information goods worse (5) better. The evolution of the Internet itself (6) serious problems. (7) the Internet has been privatized, several companies are (8) to provide the backbones that will carry traffic (9) local networks, but (10) business models for interconnection--who pays how much for each packet (11) , for example--have (12) to be developed. (13) interconnection standards are developed that make (14) cheap and easy to transmit information across independent networks, competition will (15) . If technical or economic (16) make interconnection difficult, (17) transmitting data across multiple networks is expensive or too slow, the (18) suppliers can offer a significant performance (19) ; they may be able to use this edge to drive out competitors and (20) the market.
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