---Mike, our team will play against the Rockets this weekend. I’m sure we will win. --- ! A．Congratulations B．Cheer up C．Best wishes D．Good luck 题目和参考答案——青夏教育精英家教网—

When you think about math, you probably don’t think about breaking the law, solving mysteries or finding criminals. But a mathematician in Maryland does, and he has come up with mathematical tools to help police find criminals.

People who solve crimes look for patterns that might reveal(揭示) the identity of the criminal. It’s long been believed, for example, that criminals will break the law closer to where they live, simply because it’s easier to get around in their own neighborhood. If police see a pattern of robberies in a certain area, they may look for a suspect(嫌疑犯) who lives near the crime scenes. So, the farther away from the area a crime takes place, the less likely it is that the same criminal did it.

But Mike O’Leary, a mathematician at Towson University in Maryland, says that this kind of approach may be too simple. He says that police may get better clues to the location of a criminal’s home base by combining these patterns with a city’s layout(布局) and historical crime records.

The records of past crimes contain geographical information and can reveal easy targets — that is, the kind of stores that might be less difficult to rob. Because these stores are along roads, the locations of past crimes contain information about where major streets and intersections are. O’Leary is writing a new computer program that will quickly provide this kind of information for a given city. His program also includes information about the people who live in the city, and information about how a criminal’s patterns change with age. It’s been shown, for example, that the younger the criminal, the closer to home the crime.

Other computer programmers have worked on similar software, but O’Leary’s uses more math. The mathematician plans to make his computer program available, free of charge, to police departments around the country.

The program is just one way to use math to fight crime. O’Leary says that criminology — the study of crime and criminals — contains a lot of good math problems. “I feel like I’m in a gold mine and I’m the only one who knows what gold looks like,” he says. “It’s a lot of fun.”

To find criminals, police usually ______.

A. focus on where crimes take place B. seek help from local people

C. depend on new mathematical tools D. check who are on the crime scene

O’Leary is writing a computer program that ______.

A. uses math to increase the speed of calculation

B. tells the identity of a criminal in a certain area

C. shows changes in criminals’ patterns

D. provides the crime records of a given city

By “I’m the only one who knows what gold looks like”, O’Leary means that he ______.

A. is better at finding gold than others

B. is the only one who uses math to make money

C. knows more criminals than other mathematicians

D. knows best how to use math to help solve crimes

What is the main idea of the text?

A. Criminals live near where crimes occur.

B. Math could help police find criminals.

C. Crime records could be used to fight crime.

D. Computer software works in preventing crimes.

America’s greatest technological achievement, the Hoover Dam, now has a companion piece, a bridge held up by the longest arch in the Western Hemisphere（半球）. The Mike O’Callaghan-Pat Tillman Memorial Bridge, which opened this month and connects the U.S. states of Arizona and Nevada, crosses the vast chasm（峡谷）890 feet above the Colorado River that is controlled by the dam.

The striking 1,900-foot-long structure will improve traffic in the region and help protect the dam from being destroyed. It is the seventh highest bridge in the world, behind four in China, one in Papua New Guinea and one in the US state of Colorado.

“The Hoover Dam is the greatest civil engineering achievement in America’s history,” said the bridge project manager Dave Zanatell. “Our goal was not to outdo or outshine it. Our goal was to, in a respectful way, do something that would be great for our generation and that would stand besides Hoover Dam in a respectful and quality way that would become a part of Hoover’s legacy（遗产）.”

Just as the Hoover Dam was built in the heart of the Great Depression（大萧条）and was seen as an example of the nation’s can-do spirit, some hope this project can also provide some uplift.

The bridge is surprising: at 1,050 feet, its support arch holds up a roadway that lies on 300-foot-long concrete pillars（柱子）, some of the tallest in the world. It contains 16 million pounds of steel.

　　The idea of the bridge came into being in the 1960s because the top of the Hoover Dam has been a narrow two-lane road that is the fastest route from Arizona to Las Vegas and then the Pacific Northwest and Canada.

　Access to the dam from each direction is a dangerously winding route, but massive trucks and passenger vehicles shared it for decades. During the day, when thousands of tourists travel to the dam from Las Vegas three times as many accidents as on a normal road will happen.

　The bridge has a sidewalk on the side facing the dam. The wall on both sides is 54 inches high, so walkers can take photos there.

Which of the following is true of the Hoover Dam?

A. It was completed recently.

B. It was built during the hard times.

C. It has the longest arch.

D. It’s the seventh highest dam in the world.

What is one of the purposes of building the bridge?

A. To protect the dam. B. To save the cultures.

C. To outdo the dam. D. To develop the tourism.

The underlined word “uplift” in Paragraph 4 means _____.

A. lift of the heavy object B. support in money

C. spiritual encouragement D. instruction in technology

Which of the followings shows the right position of the bridge and dam?

The text is mainly about ______.

A. the Hoover Dam

B. American western development

C. a tour along the Colorado River

D. a recently built bridge

When you think about math, you probably don’t think about breaking the law, solving mysteries or finding criminals. But a mathematician in Maryland does, and he has come up with mathematical tools to help police find criminals.
People who solve crimes look for patterns that might reveal (揭示) the identity of the criminal. It’s long been believed, for example, that criminals will break the law closer to where they live, simply because it’s easier to get around in their own neighborhood. If police see a pattern of robberies in a certain area, they may look for a suspect who lives near the crime scenes. So, the farther away from the area a crime takes place, the less likely it is that the same criminal did it.
But Mike O’Leary, a mathematician at Towson University in Maryland, says that this kind of approach may be too simple. He says that police may get better clues to the location of a criminal’s home base by combining these patterns with a city’s layout (布局) and historical crime records.
The records of past crimes contain geographical information and can reveal easy targets — that is, the kind of stores that might be less difficult to rob. Because these stores are along roads, the locations of past crimes contain information about where major streets and intersections are. O’Leary is writing a new computer program that will quickly provide this kind of information for a given city. His program also includes information about the people who live in the city, and information about how a criminal’s patterns change with age. It’s been shown, for example, that the younger the criminal, the closer to home the crime.
Other computer programmers have worked on similar software, but O’Leary’s uses more math. The mathematician plans to make his computer program available, free of charge, to police departments around the country.
The program is just one way to use math to fight crime. O’Leary says that criminology — the study of crime and criminals — contains a lot of good math problems. “I feel like I’m in a gold mine and I’m the only one who knows what gold looks like,” he says. “It’s a lot of fun.”
61. To find criminals, police usually _________.
A. check who are on the crime scene
B. seek help from local people
C. depend on new mathematical tools
D. focus on where crimes take place
62. O’Leary is writing a computer program that _________.
A. uses math to increase the speed of calculation
B. tells the identity of a criminal in a certain area
C. provides the crime records of a given city
D. shows changes in criminals’ patterns
63. By “I’m the only one who knows what gold looks like”, O’Leary means that he _________.
A. is better at finding gold than others
B. is the only one who uses math to make money
C. knows best how to use math to help solve crimes
D. has more knowledge of gold than other mathematicians
64. What do you know about O’Leary according to the passage?
A. He is a man full of impractical imagination.
B. He is a man full of self-confidence.
C. He is a man who is talkative but lazy.
D. He is a man who doesn’t like mathematics.
65. What is the main idea of the text?
A. Math could help police find criminals.
B. Criminals live near where crimes occur.
C. Crime records could be used to fight crime.
D. Computer software works in preventing crimes.

America’s greatest technological achievement, the Hoover Dam, now has a companion piece, a bridge held up by the longest arch in the Western Hemisphere（半球）. The Mike O’Callaghan-Pat Tillman Memorial Bridge, which opened this month and connects the U.S. states of Arizona and Nevada, crosses the vast chasm（峡谷）890 feet above the Colorado River that is controlled by the dam.
The striking 1,900-foot-long structure will improve traffic in the region and help protect the dam from being destroyed. It is the seventh highest bridge in the world, behind four in China, one in Papua New Guinea and one in the US state of Colorado.
“The Hoover Dam is the greatest civil engineering achievement in America’s history,” said the bridge project manager Dave Zanatell. “Our goal was not to outdo or outshine it. Our goal was to, in a respectful way, do something that would be great for our generation and that would stand besides Hoover Dam in a respectful and quality way that would become a part of Hoover’s legacy（遗产）.”
Just as the Hoover Dam was built in the heart of the Great Depression（大萧条）and was seen as an example of the nation’s can-do spirit, some hope this project can also provide some uplift.
The bridge is surprising: at 1,050 feet, its support arch holds up a roadway that lies on 300-foot-long concrete pillars（柱子）, some of the tallest in the world. It contains 16 million pounds of steel.
　　The idea of the bridge came into being in the 1960s because the top of the Hoover Dam has been a narrow two-lane road that is the fastest route from Arizona to Las Vegas and then the Pacific Northwest and Canada.
　Access to the dam from each direction is a dangerously winding route, but massive trucks and passenger vehicles shared it for decades. During the day, when thousands of tourists travel to the dam from Las Vegas three times as many accidents as on a normal road will happen.
　The bridge has a sidewalk on the side facing the dam. The wall on both sides is 54 inches high, so walkers can take photos there.
【小题1】Which of the following is true of the Hoover Dam?

A．It was completed recently.

B．It was built during the hard times.

C．It has the longest arch.

D．It’s the seventh highest dam in the world.

【小题2】What is one of the purposes of building the bridge?

A．To protect the dam.	B．To save the cultures.
C．To outdo the dam.	D．To develop the tourism.

【小题3】The underlined word “uplift” in Paragraph 4 means _____.

A．lift of the heavy object	B．support in money
C．spiritual encouragement	D．instruction in technology

【小题4】Which of the followings shows the right position of the bridge and dam?

【小题5】The text is mainly about ______.

A．the Hoover Dam

B．American western development

C．a tour along the Colorado River

D．a recently built bridge

When you think about math, you probably don’t think about breaking the law, solving mysteries or finding criminals. But a mathematician in Maryland does, and he has come up with mathematical tools to help police find criminals.

People who solve crimes look for patterns that might reveal(揭示) the identity of the criminal. It’s long been believed, for example, that criminals will break the law closer to where they live, simply because it’s easier to get around in their own neighborhood. If police see a pattern of robberies in a certain area, they may look for a suspect(嫌疑犯) who lives near the crime scenes. So, the farther away from the area a crime takes place, the less likely it is that the same criminal did it.

But Mike O’Leary, a mathematician at Towson University in Maryland, says that this kind of approach may be too simple. He says that police may get better clues to the location of a criminal’s home base by combining these patterns with a city’s layout(布局) and historical crime records.

The records of past crimes contain geographical information and can reveal easy targets — that is, the kind of stores that might be less difficult to rob. Because these stores are along roads, the locations of past crimes contain information about where major streets and intersections are. O’Leary is writing a new computer program that will quickly provide this kind of information for a given city. His program also includes information about the people who live in the city, and information about how a criminal’s patterns change with age. It’s been shown, for example, that the younger the criminal, the closer to home the crime.

Other computer programmers have worked on similar software, but O’Leary’s uses more math. The mathematician plans to make his computer program available, free of charge, to police departments around the country.

The program is just one way to use math to fight crime. O’Leary says that criminology — the study of crime and criminals — contains a lot of good math problems. “I feel like I’m in a gold mine and I’m the only one who knows what gold looks like,” he says. “It’s a lot of fun.”

1.

To find criminals, police usually ______.

A. focus on where crimes take place B. seek help from local people

C. depend on new mathematical tools D. check who are on the crime scene

2.

O’Leary is writing a computer program that ______.

A. uses math to increase the speed of calculation

B. tells the identity of a criminal in a certain area

C. shows changes in criminals’ patterns

D. provides the crime records of a given city

3.

By “I’m the only one who knows what gold looks like”, O’Leary means that he ______.

A. is better at finding gold than others

B. is the only one who uses math to make money

C. knows more criminals than other mathematicians

D. knows best how to use math to help solve crimes

4.

What is the main idea of the text?

A. Criminals live near where crimes occur.

B. Math could help police find criminals.

C. Crime records could be used to fight crime.

D. Computer software works in preventing crimes.

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