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.”
小題1:
To find criminals, police usually ______.
A．focus on where crimes take placeB．seek help from local people
C．depend on new mathematical toolsD．check who are on the crime scene
小題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
小題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
小題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.

小題1:A
小題1:D
小題1:D
小題1:B
略
練習冊系列答案
相關習題

科目：高中英語 來源：不詳 題型：完形填空

Where did all the tigers go? That’s what Indian Prime Minister Manmohan Singh wants to know. India’s Sariska Project Tiger Reserve, once home to 26 tigers, is now home to none. Singh has ordered a police investigation into the   39 ，and created a new taskforce to save the   40  animals.
Tigers are an endangered species(物種). Half of the world’s tiger   41  live in India. For years, tigers have been disappearing from India’s national parks, but Sariska may be the last straw. And the government has to react.
On Thursday, Singh held the first meeting of   42  officials, wildlife experts, and related leaders, aiming to count the nation’s remaining tigers, and to come up with a plan to keep them safe.
It is not hard to guess why the tigers are disappearing. Poachers (偷獵者) can   43  the big cats for $50,000 each. Tiger skin and bones are popular in Chinese   44 . A single tiger tooth can fetch $120. Recently, a group of poachers admitted killing ten tigers in Sariska and were   45 .
“Indian tiger poaching is probably the biggest conservation problem in modern times.” said Belinda Wright, the head of the Wildlife Protection Society of India.
However, poaching isn’t the only   46 . Many poachers use advanced technologies, like night glasses and long–range binoculars. Forest security officers are paid so   47  that few of them bother to track down the poachers. Even if a security guard were to find a poacher, many carry only a stick to make him obey the law.
Tiger fans hope that Singh’s plans mean end for the poachers and   48  for the endangered species.
小題1:
A．project B．disappearanceC．reserveD．home
小題2:
A．dangerousB．huge C．rare D．fierce
小題3:
A．populationB．percentageC．generationD．group
小題4:
A．businessB．tradeC．army D．forest
小題5:
A．raiseB．hunt C．sell D．shoot
小題6:
A．foodB．traditionC．cultureD．medicine
小題7:
A．foundB．arrested C．prohibitedD．controlled
小題8:
A．problemB．worryC．crimeD．factor
小題9:
A．commonlyB．poorlyC．slightly D．highly
小題10:
A．success B．lampC．hope D．achievement

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

We like to consider ourselves the superior race, and we are. It’s true that we are getting to know more and more, and we actually live in “the information age”. Our human vanity(虛榮心) makes us believe that we really have to know everything! Surprisingly, we do not have this ability. The question “what is happening in the Bermuda Triangle” is the very proof.
Where is the Bermuda Triangle located? The mysterious triangle is believed to be situated between Florida, Bermuda and Puerto Rico, where too many unusual events have happened.
On December the 5th 1945, five U.S. military planes took off from Florida on a clear day only to disappear over Bermuda. Furthermore, some other disappearances took place; in 1947, an American C54 plane simply disappeared at 100 miles from Bermuda; at 80 miles, a Star Tiger plane disappeared in 1948.
Even Columbus had trouble in Bermuda. Some of his journals were about the strange happenings there: “the waters are changing their colors” and “compasses are going wild”.
Maybe it’s why it is called the Devil’s triangle or the Atlantic cemetery.
Many hypotheses were stated in order to explain the strange events. In spite of these attempts, the mystery of the Bermuda Triangle remains unsolved.
Some people get to say that maybe aliens are involved in it. Other imaginative scientists relate the happenings in Bermuda to Einstein’s theory, saying that the missing ships and planes are translated to another dimension of space and time and taken into another world.
Maybe we will just have to wait to go to Heaven and ask the One who made it. The answer will surely be a satisfying one!
小題1:The writer may probably think that______.
A．humans have to and can know everything strange
B．the missing ships are taken into another world
C．humans can know more in “the information age”
D．God created the mystery of the Bermuda Triangle
小題2: Columbus’ journals told us that in Bermuda _______.
A．an American C54 plane disappeared
B．there were some strange happenings
C．the compasses were lost
D．a cemetery was found
小題3:The underlined word “hypotheses” in the 6th paragraph probably means______.
A．guessesB．reportsC．placesD．stories
小題4:The purpose of the writer is to______.
A．tell some stories about the Bermuda Triangle
B．warn people not to travel to the Bermuda Triangle
C．laugh at man’s vanity to know everything
D．prove man does not have the ability to know all

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

Most people think that the older you get, the harder it is to learn a new language. That is, they believe that children learn more easily and efficiently than adults. Thus, at some point in our lives, maybe around age 12 or 13, we lose the ability to learn languages well. Is this idea a fact or myth(懸念)？
Is it true that children learn a foreign language more efficiently than adults? On the contrary, research studies suggest that the opposite may be true. One report, on 2,000 Danish children studying Swedish, concluded that the teenagers learned more, in less time, than the younger children. Another report, on Americans learning Russian, showed a direct improvement of ability over the age range tested; that is, the ability to learn increased as the age increased, from childhood to adulthood.
There are several possible explanations for these findings. For one thing, adults know more about the world and therefore are able to understand meanings more easily than children. Moreover, adults can use logical(邏輯的) thinking to help themselves see patterns in the language. Finally, adults have more self-discipline (self-control) than children.
All in all, it seems that the common idea that children are better language learners than adults may not be a fact, but a myth.
小題1:The main idea of the passage is that         .
A．teenagers are more difficult to teach
B．Danish teenagers can learn Swedish faster than younger children
C．adults are more logical than children
D．the ability to learn languages increases with age
小題2: If most people’s idea of learning languages is true, people may lose ability to learn languages well         .
A．at an early ageB．when they reach their twenties
C．at an old ageD．after they become young men
小題3:According to the passage, teenagers can learn a foreign language __________ than younger children.
A．harderB．more efficientlyC．more slowly D．more carefully
小題4:The reason why adults understand meanings more easily than children is that         .
A．adults have more self-discipline
B．adults like to play more than children
C．adults have more knowledge than children
D．adults accept new things more easily than children
小題5:The explanation for older student’s better achievement not mentioned in the above passage is that       .
A．adults know more about the world.B．adults can use logical thinking
C．adults have more self-discipline.D．adults can read better.

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

Researchers are placing robotic dogs（機器狗）in the homes of lonely old people to determine whether they can improve the quality of life for humans. Alan Beck, an expert in human-animal relationship, and Nancy Edwards, a professor of nursing, are leading the animal-assisted study concerning the influence of robotic dogs on old people’s depression, physical activity, and life satisfaction. “No one will argue that an older person is better off being more active, challenged, or stimulated（應急的） ,”Edwards points out. “The problem is how we promote that, especially for those without friends or help. A robotic dog could be a solution.”
In the study, the robot, called AIBO, is placed for six weeks in the houses of some old people who live alone. Before placing AIBO in the home, researchers will collect baseline data for six weeks. These old people will keep a diary to note their feelings and activity before and after AIBO. Then, the researchers will review the data to determine if it has inspired any changes in the life of its owner.
“I talk to him all the time, and he responds to my voice,” says a seventy-year-old lady, “When I’m watching TV, he’ll stay in my arms until he wants down. He has a mind of his own.”
The AIBOs respond to certain orders. The researchers say they have some advantages over live dogs, especially for old people. Often the elderly are disabled(行動不便的) and cannot care for an animal by walking it or playing with it. A robotic dog removes（免除） exercise and feeding concerns.
“At the beginning, it was believed that no one would relate to the robotic dog, because it was metal and not furry.” Beck says，“But it’s amazing how quickly we have given up that belief.”
“Hopefully, down the road, these robotic pets could become a more-valuable health helper. They will record their masters’ blood pressure, oxygen levels, or heart rhythms. AIBOs may even one day have games that can help stimulate older people’s minds.”
小題1: The purpose of Beck and Edwards’ study is to        .
A．understand human-animal relationship
B．find the causes of old people’s loneliness
C．make lonely old people’s life better
D．promote the animal-assisted research
小題2:In the research, the old people are asked to        .
A．note the activities of AIBOsB．record their feelings and activity
C．keep AIBOs at home for 12 weeksD．analyze the collected information
小題3:What is the advantage of AIBO over live dogs?
A．It is easier to keep at home.B．It responds to all the human orders.
C．It can help the disabled people.D．It can watch TV with its owner.

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

A scientist turns out to be able to see the future by offering each of some four-year-olds a piece of candy and watching how he or she deals with it. Some children reach eagerly for the treat they see. Some last a few minutes before they give in. But others are determined to wait until the last moment.
By the time the children reach high school, something remarkable has happened. A survey found that those who as four-year-olds had enough self-control to hold out generally grew up to be more popular, adventurous, confident and dependable. The children who gave in to temptation early on were more likely to be lonely, easily frustrated and inflexible .
Actually, the ability to delay reward is a sign of emotional intelligence which doesn’t show up on an IQ test.
The hardware of the brain and the software of the mind have long been scientists’ concerns. But brain theory can’t explain what we wonder about most, like the question why some people remain upbeat in the face of troubles that would sink a less resistant soul.   
Here comes the theory of Daniel Goleman, writer of Emotional Intelligence: when it comes to predicting people’s success, brain ability as measured by IQ may actually matter less than the qualities of mind once thought of as “character”.
EQ is not the opposite of IQ. What researchers have been trying to understand is how they work together; how one’s ability to handle stress, for instance, affects the ability to concentrate and put intelligence to use. Among the elements for success, researchers now generally agree that IQ counts for about 20%; the rest depends on everything from social class to luck.
While many researchers in this relatively new field are glad to see emotional issues finally taken seriously, some few fear EQ invites misuse.
小題1:Which of the following is true of EQ and IQ according to the text?
A．The higher a person’s EQ is, the higher his or her IQ is.
B．The higher a person’s IQ is, the higher his or her EQ is.
C．Some people can be blessed with lots of both, but some with little of either.
D．Scientists have already discovered the way in which EQ and IQ work together.
小題2: The underlined word “upbeat” in Paragraph 4 probably means         .
A．kindB．floatingC．excitedD．optimistic
小題3:What is most likely to be written in the paragraph that follows?
A．Information about famous people with high EQ.
B．Examples showing the opposite voice about EQ.
C．Some reasons why EQ is a relatively new field.
D．Strong demand for basic emotional education.

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

New archaeological discoveries suggest that trade between Europe and Asia along the Silk Road probably began in some form many centuries earlier than once thought. The findings, coupled with a widening range of scientific and historical research could add a fascinating new page to the epic (史詩) of the Silk Road.
The most surprising discovery is pieces of silk found in the hair of an Egyptian mummy from about 1000 BC, long before regular traffic on the Silk Road and at least one thousand years before silk was previously thought to be used in Egypt. Other research may extend human activity along this route back even further, perhaps a million years to the migration of human ancestors into eastern Asia.
The official origin of East-West trade along the road is usually placed in the late 2nd century BC when an agent of the Chinese Emperor Wu-di returned from a dangerous secret mission（使命）across the desert into the remote high country of Central Asia. The agent, Zhang Qian, travelled as far as Afghanistan and brought back knowledge of even more distant lands such as Persia, Syria and a place known as Lijien, perhaps Rome. Historians have called this one of the most important journeys in ancient times. His journey opened the way for what have been thought to be the first indirect contacts between the ancient world’s two superpowers, China and Rome. Chinese silk, first traded to central Asian tribes for war horses and to the Parthian for acrobats and ostrich eggs, was soon finding its way through a network of merchants to the luxury (奢侈品) markets in Rome.
But the new discoveries show that Chinese silk was apparently present in the West long before the Han emperor started organized trade over the Silk Road. The research could change thinking about the early history of world trade and provide insights into the mystery of just how and when Europe and the Mediterranean lands first became aware of the glorious culture at the other end of Eurasia.
小題1:The word “coupled” in the first paragraph could best be replaced by        .
A．combinedB．contributedC．doubledD．produced
小題2:The silk thread found in the hair of an Egyptian mummy suggests that         .
A．Egyptians had probably travelled to China to buy silk
B．new light can now be thrown on ancient trading practices
C．historical research often achieves fascinating results
D．trade along the Silk Road began earlier than once thought
小題3:Until recently historians mostly believed that trade along the Silk Road       .
A．began a million years ago
B．primarily benefited the Egyptians
C．originated in the 2nd century BC
D．extended human migration into eastern Asia
小題4:Historians have always considered Zhang Qian’s mission important because they believe       .
A．he discovered the Silk Road
B．he helped establish East-West trade
C．he travelled as far as Afghanistan
D．he brought back knowledge of Rome to the emperor

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

It takes two to duet (二重唱), and one question for scientists is how these coordinated (協(xié)調的) performances arise — in birds. Are they the result of cooperation, a way in which one pair signals to others that they’ve got it together? Or are they the result of conflict, evolving to avoid one partner’s song interfering with the other’s?
A study of duetting in Peruvian warbling antbirds(蟻鳥) suggests that it might be a little of both, and that context is everything. Joseph A. Tobias and Nathalie Seddon of the University of Oxford show in Current Biology that sexual conflict can cause the female of a pair that normally cooperates to “jam” the male’s song by singing over it.
The researchers exposed antbird pairs to recorded songs of other antbirds and monitored the songs the pairs produced. In one experiment, they played the songs of an intruding pair. In this case, the resident pair “both are likely to lose their territory, so both should cooperate,” Dr. Tobias said. And they do. They produce a coordinated duet that in effect tells the intruders to keep away.
But when the researchers played the song of a single female, the pair behaved differently. “You’d expect the resident female to be highly motivated to defend her position in the partnership,” Dr. Tobias said. And that’s what occurs. The male sings its heart out, flirting(調情) with the single female, and the female of the pair does its best to interfere with the song by singing over it, apparently to make her mate less attractive to the other female.
“It’s clear that the male doesn’t like what she’s doing,” Dr. Tobias said. The behavior “breaks up what is otherwise a very cooperative situation into a more complicated signal,” he added.
It’s the first evidence of this kind of signal jamming among pairs, Dr. Tobias said.
And in that it leads the male to alter its song to avoid the female’s interfering notes, it shows that this kind of conflict could, over a long period, drive the evolution of coordinated song.
小題1:
What is the key factor of antbirds’ duet?
A．Their cooperation.B．Their conflict.
C．The context.D．Their instinct.
小題2:
How did the researchers conduct the experiment?
A．They put the antbird pairs back to nature and observe them.
B．They played different recorded songs of other antbirds.
C．They put an antbird to the other’s territory and observed.
D．They played the songs of an intruding pair.
小題3:
Why did the female bird sing according to Paragraph 4?
A．It wanted to show its singing talent to the partner.
B．It aimed at keeping the partnership with the male.
C．It wanted to frighten the other females.
D．It wanted to make her mate more attractive.
小題4:
Which of the following is the topic of this passage?
A．The special phenomenon about birds pairs.
B．The conflict of bird pairs.
C．The cooperation of bird pairs.
D．The piece of music for bird pairs.

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

When it comes to protecting the privacy of their children, U.S. parents give social networks a failing grade. According to a recent survey, three out of four parents believe social networks are not doing a good job of protecting kids’ online privacy.
The survey was conducted for Common Sense Media, a nonprofit organization devoted to helping families find the right way to deal withthe world of media and technology.
Ninety-two percent of parents said they are concerned that children share too much information online, and 85 percent said they are more concerned about online privacy than they were five years ago. In other findings, Common Sense Media found that 68% of parents are not at all confident in search engines keeping their private information safe and secure and 71% of parents said the same about social networking sites.
The survey found a great deal of concern about the online geo-location services which find and show the exact position of somebody through the net. Ninety-one percent of parents said search engines and social networking sites should not be able to share the physical location of children with other companies unless the parents approve.
“The survey results present a clear divide between the industry’s view of privacy and the opinion of parents and kids,” Common Sense Media CEO and founder James Steyer said.
“American families are deeply worried about how their personal information is being used by technology and online companies, yet the companies appear to be keeping their heads deep in the sand,” Steyer said.
IT companies need to step up but parents, children, schools and government also need to do more, he said.
“Parents and kids have to educate themselves about how to protect their information,” he said. “Schools should teach all students and their parents about privacy protection.”
“And finally, policymakers have to update privacy policies for the 21st century,” he said. According to the survey, more than 60 percent of parents want the US Congress to update online privacy laws for children and teenagers.
小題1: What does the underlined part in Paragraph 6 mean?
A．Refusing to admit the problem.B．Refusing to work with others.
C．Trying to find a solution to the problemD．Trying to look deep into the problem.
小題2: According to James Steyer, the following organizations should make more contributions to protecting    
children’s online privacy except __________.
A．IT companiesB．GovernmentC．SchoolsD．Nonprofit Organizations
小題3:What can be inferred from the passage?
A．Parents are worried about social networks because they lead to the children’s failing grades.
B．Most US parents agree that the online geo-location services should be forbidden.
C．Most USparents will support a law that limits IT companies to using personal information.
D．US Congress has not yet passed any online privacy law for children and teenagers.
小題4: Which of the following may be the best title for the passage?
A．US Congress to Update Privacy Policies for 21st Century
B．Common Sense Media Warns Against Social Networks
C．US Parents Want Better Online Privacy Protection for Kids
D．Worry Grows for Problems Caused by Social Networks

查看答案和解析>>

同步練習冊答案