Reseachers at the University of Kansas say that people can accurately judge 90 percent of a stranger's personality simply by looking at the person’s shoes.“Shoes convey useful information about their wearers,’’the authors wrote in the new study published in the Journal of Research in Personality.
Lead researcher Omri Gillath said the judgments were based on the style,cost,color and condition of someone’s shoes.In the study,63 University of Kansas researchers looked at pictures showing 208 different pairs of shoes worn by the study’s participants.Volunteers in the study were photographed in their most commonly worn shoes,and then filled out a personality questionnaire.
Some of the results were expected:People with higher incomes most commonly wore expensive shoes,and flashier shoes were typically worn by outgoing people.However,some of the more specific results are strange enough.For example,“practical and functional’’shoes were generally worn by more“pleasant"people,while ankle boots were more linked with ‘‘aggressive’’personalities.The strangest of all may be that those who wore‘‘uncomfortable looking” shoes tend to have “calm” personalities. And if you have several pairs of new shoes or take extreme care of them,you may suffer from“attachment anxiety",spending lots of time worrying about what other people think of your appearance.There was even a political calculation in the mix with more liberal(主张变革的)types wearing“shabbier and less expensive” shoes.
The researchers noted that some people will choose shoe styles to mask their actual personalities,but researchers noted that volunteers were also likely to be unaware that their footwear choices were showing the deep side of their personalities.
1.What does this text mainly tell us?
A.People’s personalities call be judged by their shoes.
B.Shoes convey false information about the wearer.
C.People know little about their personalities.
D.Shoes Call hide people’s real personalities.
2.The participants were asked to
A.look at pictures of different shoes
B.provide pictures of their shoes
C.hand in their commonly worn shoes
D.design a personality questionnaire
3.Which of the results is beyond people’s expectation?
A.Pleasant people like wearing uncomfortable shoes.
B.Wealthy people often wear expensive shoes.
C.Flahshier shoes are typically worn by outgoing people.
D.Aggressive people are likely to weal"ankle boots.
4.People suffering from“attachment anxiety” tend to
A.become a political leader
B.have a calm character
C.worry about their appearance
D.wear strange shoes
5.The author wrote the text in order to
A.teach how to choose shoes
B.describe different personalities
C.inform us of a new study
D.introduce a research method
高三英语阅读理解中等难度题
Reseachers at the University of Kansas say that people can accurately juage 90 percent of a stranger's personality simply by looking at the person’s shoes.“Shoes convey useful information about their wearers,’’the authors wrote in the new study published in the Journal of Research in Personality.
Lead researcher Omri Gillath said the judgments were based on the style,cost,color and condition of someone’s shoes.In the study,63 University of Kansas researchers looked at pictures showing 208 different pairs of shoes worn by the study’s participants.Volunteers in the study were photographed in their most commonly worn shoes,and then filled out a personality questionnaire.
Some of the results were expected:People with higher incomes most commonly wore expensive shoes,and flashier shoes were typically worn by outgoing people.However,some of the more specific results are strange enough.For example,“practical and functional’’ shoes were generally worn by more “pleasant" people,while ankle boots were more linked with ‘‘aggressive’’ personalities.The strangest of all may be that those who wore‘ ‘uncomfortable looking” shoes tend to have “calm” personalities.And if you have several pairs of new shoes or take extreme care of them,you may suffer from “attachment anxiety",spending lots of time worrying about what other people think of your appearance.There was even a political calculation in the mix with more liberal(主张变革的)types wearing “shabbier and less expensive” shoes.
The researchers noted that some people will choose shoe styles to mask their actual personalities,but researchers noted that volunteers were also likely to be unaware that their footwear choices were showing the deep side of their personalities.
1.What does this text mainly tell us?
A.Shoes Call hide people’s real personalities.
B.Shoes convey false information about the wearer.
C.People’s personalities call be judged by their shoes.
D.People know little about their personalities.
2.The participants were asked to
A.provide pictures of their shoes
B.look at pictures of different shoes
C.design a personality questionnaire
D.hand in their commonly worn shoes
3.Which of the results is beyond people’s expectation?
A.Wealthy people often wear expensive shoes.
B.Pleasant people like wearing uncomfortable shoes.
C.Aggressive people are likely to wear"ankle boots.
D.Fashion shoes are typically worn by outgoing people.
4.People suffering from“attachment anxiety” tend to
A.wear strange shoes B.worry about their appearance
C.have a calm character D.become a political leader
5.The author wrote the text in order to
A.inform us of a new study B.introduce a research method
C.teach how to choose shoes D.describe different personalitie
高三英语阅读理解困难题查看答案及解析
Reseachers at the University of Kansas say that people can accurately judge 90 percent of a stranger's personality simply by looking at the person’s shoes.“Shoes convey useful information about their wearers,’’the authors wrote in the new study published in the Journal of Research in Personality.
Lead researcher Omri Gillath said the judgments were based on the style,cost,color and condition of someone’s shoes.In the study,63 University of Kansas researchers looked at pictures showing 208 different pairs of shoes worn by the study’s participants.Volunteers in the study were photographed in their most commonly worn shoes,and then filled out a personality questionnaire.
Some of the results were expected:People with higher incomes most commonly wore expensive shoes,and flashier shoes were typically worn by outgoing people.However,some of the more specific results are strange enough.For example,“practical and functional’’shoes were generally worn by more“pleasant"people,while ankle boots were more linked with ‘‘aggressive’’personalities.The strangest of all may be that those who wore‘‘uncomfortable looking” shoes tend to have “calm” personalities. And if you have several pairs of new shoes or take extreme care of them,you may suffer from“attachment anxiety",spending lots of time worrying about what other people think of your appearance.There was even a political calculation in the mix with more liberal(主张变革的)types wearing“shabbier and less expensive” shoes.
The researchers noted that some people will choose shoe styles to mask their actual personalities,but researchers noted that volunteers were also likely to be unaware that their footwear choices were showing the deep side of their personalities.
1.What does this text mainly tell us?
A.People’s personalities call be judged by their shoes.
B.Shoes convey false information about the wearer.
C.People know little about their personalities.
D.Shoes Call hide people’s real personalities.
2.The participants were asked to
A.look at pictures of different shoes
B.provide pictures of their shoes
C.hand in their commonly worn shoes
D.design a personality questionnaire
3.Which of the results is beyond people’s expectation?
A.Pleasant people like wearing uncomfortable shoes.
B.Wealthy people often wear expensive shoes.
C.Flahshier shoes are typically worn by outgoing people.
D.Aggressive people are likely to weal"ankle boots.
4.People suffering from“attachment anxiety” tend to
A.become a political leader
B.have a calm character
C.worry about their appearance
D.wear strange shoes
5.The author wrote the text in order to
A.teach how to choose shoes
B.describe different personalities
C.inform us of a new study
D.introduce a research method
高三英语阅读理解中等难度题查看答案及解析
Researchers at the University of Kansas say that people can accurately judge 90 percent of a stranger's personality simply by looking at the person's shoes.“Shoes convey a thin but useful slice of information about their wearers,” the authors wrote in the new study published in the Journal of Research in Personality.“Shoes serve a practical purpose, and also serve as nonverbal cues (线索) with symbolic messages.People tend to pay attention to the shoes they and others wear.”
Medical Daily notes that the number of detailed personality traits (特质) detected in the study include a person's general age, income, political tendency, and other personality traits, including someone's emotional stability.Lead researcher Omri Gillath said the judgments were based on the style, cost, color and condition of someone's shoes.In the study, 63 University of Kansas students looked at pictures showing 208 different pairs of shoes worn by the study's participants.Participants in the study were photographed in their most commonly worn shoes, and then filled out a personality questionnaire.
So, what do your shoes say about your personality? Some of the results were expected: People with higher incomes most commonly wore expensive shoes, and flashier footwear was typically worn by outgoing people.However, some of the more specific results are interesting.For example, “practical and functional” shoes were generally worn by more “friendly” people, while ankle boots were more closely connected with “aggressive” personalities.The strangest of all may be that those who wore “uncomfortable looking” shoes tend to have “calm” personalities.
And if you have several pairs of new shoes or take exceptional care of them, you may suffer from “attachment anxiety,” spending too much time worrying about what other people think of your appearance.There was even a political calculation in the mix with wearing “shabbier and less expensive” shoes.
The researchers noted that some people will choose shoe styles to mask their actual personality traits, but researchers pointed out that volunteers were also likely to be unaware that their footwear choices were revealing deep insights into their personalities.
1.By looking at a person’s shoes, it’s possible for people to_____.
A.know the wearer thoroughly and accurately
B.form an opinion about the wearer’s character
C.have exact cues about the wearer’s social status
D.judge the wearer’s educational background
2.What can we know about the passage?
A.Wealthy people tend to choose shiny shoes.
B.Calm people prefer shoes with uncomfortable appearance.
C.Friendly people are likely to wear ankle boots.
D.Outgoing people always wear shoes with practical functions.
3.Taking exceptional care of new shoes shows that _____.
A.the owners care much about others’ opinions on their appearance
B.the owners are in a relaxed state
C.the owners are particular about their appearance
D.the owners have too many shoes to choose from
4.What is the best title of the passage?
A.How To Choose Suitable Shoes
B.How To Judge People’s Personality Traits
C.People Are What They Wear
D.Shoes Reflect People’s Personalities
高三英语阅读理解中等难度题查看答案及解析
Researchers at the University of Kansas say that people can accurately judge 90 percent of a stranger's personality simply by looking at the person's shoes.” Shoes convey useful information about their wearers,”the authors wrote in the new study published in the Journal of Research in Personality.
Lead researcher Omri Gillath said the judgments were based on the style,cost,color and condition of someone's shoes. In the study,63 University of Kansas researchers looked at pictures showing 208 different pairs of shoes worn by the study's participants. Volunteers in the study were photographed in their most commonly worn shoes,and then filled out a personality questionnaire.
Some of the results were expected:People with higher incomes most commonly wore expensive shoes,and flashier shoes were typically worn by outgoing people. However,some of the more specific results are strange enough. For example,“practical and functional”shoes were generally worn by more“pleasant”people,while ankle boots were more linked with“aggressive”personalities. The strangest of all may be that those who wore” uncomfortable looking” shoes tend to have “calm” personalities. And if you have several pairs of new shoes or take extreme care of them,you may suffer from“attachment anxiety”,spending lots of time worrying about what other people think of your appearance. There was even a political calculation in the mix with more liberal(主张变革的)types wearing” shabbier and less expensive” shoes.
The researchers noted that some people will choose shoe styles to mask their actual personalities,but researchers noted that volunteers were also likely to be unaware that their footwear choices were showing the deep side of their personalities.
1.What does this text mainly tell us?
A. Shoes can hide people's real personalities.
B. Shoes convey false information about the wearer.
C. People's personalities can be judged by their shoes.
D. People know little about their personalities.
2.The participants were asked to .
A. provide pictures of their shoes
B. look at pictures of different shoes
C. design a personality questionnaire
D. hand in their commonly worn shoes
3.Which of the results is beyond people's expectation?
A. Wealthy people often wear expensive shoes.
B. Pleasant people like wearing uncomfortable shoes.
C. Aggressive people are likely to wear ankle boots.
D. Flashier shoes are typically worn by outgoing people.
4.People suffering from“attachment anxiety” tend to .
A. wear strange shoes B. worry about their appearance
C. have a calm character D. become a political leader
高三英语阅读理解困难题查看答案及解析
Researchers at the University of Kansas say that people can accurately judge 90 percent of a stranger's personality simply by looking at the person's shoes.
"Shoes convey a thin but useful slice of information about their wearers," the authors wrote in the new study published in the Journal of Research in Personality."Shoes serve a practical purpose, and also serve as nonverbal cues with symbolic messages.People tend to pay attention to the shoes they and others wear."
Medical Daily notes that the number of detailed personality traits detected in the study include a person's general age, their gender, income, political affiliation, and other personality traits, including someone's emotional stability.
Lead researcher Omri Gillath said the judgments were based on the style, cost, color and condition of someone's shoes.In the study, 63 University of Kansas students looked at pictures showing 208 different pairs of shoes worn by the study's participants.Volunteers in the study were photographed in their most commonly worn shoes, and then filled out a personality questionnaire.
So, what do your shoes say about your personality?
Some of the results were expected: People with higher incomes most commonly wore expensive shoes, and flashier footwear was typically worn by extroverts(外向性格的人).
However, some of the more specific results are intriguing.For example, "practical and functional" shoes were generally worn by more "agreeable" people, while ankle boots were more closely aligned with "aggressive" personalities.
The strangest of all may be that those who wore "uncomfortable looking" shoes tend to have "calm" personalities.
And if you have several pairs of new shoes or take exceptional care of them, you may suffer from "attachment anxiety," spending an inordinate amount of time worrying about what other people think of your appearance.
There was even a political calculation in the mix with more liberal types wearing "shabbier and less expensive" shoes.
The researchers noted that some people will choose shoe styles to mask their actual personality traits, but researchers noted that volunteers were also likely to be unaware that their footwear choices were revealing deep insights into their personalities.
1.We learn from the text that shoes one wears may________.
A.be used to judge others’ personality accurately
B.show thick and useful information about one’s personality
C.convey useful information including one’s emotional stability
D.only convey some information about one’s personality
2.Which of the following is not true according to the text?
A.People who wear practical and functional shoes may be hard to deal with.
B.People with high incomes probably wear expensive shoes.
C.Ankle boots are closely aligned with “aggressive” personalities.
D.People wearing “uncomfortable looking” shoes tend to be calm.
3.What can be the best title for this article?
A.Shoes and Information B.Shoes and One’s Personality
C.Shoes One Wears D.Judging One’s Personality
高三英语阅读理解中等难度题查看答案及解析
Researchers at the University of Kansas say that people can accurately judge 90 percent of a stranger’s personality simply by looking at the person’s shoes.
“Shoes convey a thin but useful piece of information about their wearers,” the authors wrote in the new study published in the Journal of Research in Personality. “Shoes serve a practical purpose, and also serve as nonverbal(非语言的) indications with symbolic messages. People tend to pay attention to the shoes they and others wear.”
Medical Daily notes that the details detected in the study include a person’s general age, sex, income, political affiliation(派别), and other personality characteristics, including someone’s emotional stability.
Lead researcher Omri Gillath said the judgments were based on the style, cost, color, and condition of someone’s shoes. In the study, 63 University of Kansas students looked at pictures showing 208 different pairs of shoes worn by the study’s participants. Volunteers in the study were photographed in their most commonly worn shoes, and then filled out a personality questionnaire.
So, some of the results were expected: People with higher incomes most commonly wore expensive shoes, and flashier footwear was typically worn by extroverts(外向者).
However, some of the more specific results are interesting. For example, “practical and functional” shoes were generally worn by more “agreeable” people, while ankle boots went more closely with “aggressive” personalities.
The strangers of all may be that those who wore “uncomfortable looking” shoes tend to have “calm” personalities.
And if you have several pairs of new shoes or take exceptional care of them, you may suffer from “attachment anxiety”, spending a large amount of time worrying about what other people think of your appearance.
There was even a political calculation in the mix with more liberal types wearing “shabbier and less expensive” shoes.
The researchers noted that some people will choose shoe styles to mask their actual personality characteristics, but researchers noted that volunteers were also likely to be unaware that their footwear choices were showing deep awareness into their personalities.
1.According to Omri Gillath, a stranger’s personality can be judged by ___.
A. he age and sex of the person
B. the personality questionnaire by the person
C. the emotional stability of the person
D. the shoes the person wears
2.We can infer from Paragraph 2 that ___.
A. a practical purpose is to wear shoes
B. people want to buy new shoes they pay attention to
C. shoes are vital to their wearers
D. the Journal of Research in Personality is a magazine
3.The underlined word “agreeable” is closest in meaning to __.
A. gentle B. weak C. generous D. considerate
4. Which might be the best title for the passage?
A. Good Shoes, Good Character
B. Bad Shoes, Bad Personality
C. Shoes and Their Wearers’ Personality
D. Shoes Shape A Person’s Character
高三英语阅读理解困难题查看答案及解析
Researchers at the University of Kansas say that people can accurately judge 90 percent of a stranger’s personality simply by looking at the person’s shoes.
“Shoes convey a thin but useful piece of information about their wearers,” the authors wrote in the new study published in the Journal of Research in Personality. “Shoes serve a practical purpose, and also serve as nonverbal(非语言的) indications with symbolic messages. People tend to pay attention to the shoes they and others wear.”
Medical Daily notes that the details detected in the study include a person’s general age, sex, income, political affiliation(派别), and other personality characteristics, including someone’s emotional stability.
Lead researcher Omri Gillath said the judgments were based on the style, cost, color, and condition of someone’s shoes. In the study, 63 University of Kansas students looked at pictures showing 208 different pairs of shoes worn by the study’s participants. Volunteers in the study were photographed in their most commonly worn shoes, and then filled out a personality questionnaire.
So, some of the results were expected: People with higher incomes most commonly wore expensive shoes, and flashier footwear was typically worn by extroverts(外向者).
However, some of the more specific results are interesting. For example, “practical and functional” shoes were generally worn by more “agreeable” people, while ankle boots went more closely with “aggressive” personalities.
The strangers of all may be that those who wore “uncomfortable looking” shoes tend to have “calm” personalities.
And if you have several pairs of new shoes or take exceptional care of them, you may suffer from “attachment anxiety”, spending a large amount of time worrying about what other people think of your appearance.
There was even a political calculation in the mix with more liberal types wearing “shabbier and less expensive” shoes.
The researchers noted that some people will choose shoe styles to mask their actual personality characteristics, but researchers noted that volunteers were also likely to be unaware that their footwear choices were showing deep awareness into their personalities.
1.According to Omri Gillath, a stranger’s personality can be judged by ___.
A. the age and sex of the person
B. the personality questionnaire by the person
C. the emotional stability of the person
D. the shoes the person wearst
2.We can infer from Paragraph 2 that ___.
A. a practical purpose is to wear shoes
B. people want to buy new shoes they pay attention to
C. shoes are vital to their wearers
D. the Journal of Research in Personality is a magazine
3.The underlined word “agreeable” is closest in meaning to __.
A. gentle B. weak C. generous D. considerate
4. Which might be the best title for the passage?
A. Good Shoes, Good Character
B. Bad Shoes, Bad Personality
C. Shoes and Their Wearers’ Personality
D. Shoes Shape A Person’s Character
高三英语阅读理解简单题查看答案及解析
Dan Bebber is a senior research fellow at the University of Exeter in Britain. He says research has shown that wild plants and animals are moving toward Earth's North and South poles as the planet warms.
Mr Bebber wanted to know if the same thing was happening with organisms that attack agricultural crops. He examined reports of first sightings of new insects and diseases around the world. The records came from CABI - the Centre for Agricultural Bioscience International. He says the group began collecting information from developing and industrialized countries years ago.
Dan Bebber and his research team studied 612 different organisms - from viruses and bacteria to insects like beetles and butterflies. They found that since 1960, crop pests and diseases have been moving toward the poles at an average rate of about 3 kilometers each year. Mr Bebber says this puts the most productive farmland in the world in danger.
"As new species of pests and diseases evolve and potentially the environment for them becomes more amenable at higher latitudes, the pressure on the breadbaskets of the world is going to increase."
Farmers face other threats. Invasive species passed through trade are also causing problems. Gene Kritsky is an Entomologist at the College of Mount St. Joseph in Ohio. He specialises in the study of insects. He says climate change may improve conditions for some invasive species.
“It means that species in other parts of the world that might do well in warmer temperatures can now do well in the breadbasket of America.”
Another Entomologist Christian Krupke of Purdue University says the effects of these changes will depend very much on the crop, the insect and the disease. But he says the research is a warning sign that people should care about climate change and do something about it.
1.The purpose of Dan Bebber’s research was to find ______.
A. if farmland could be moved to colder places thanks to global warming
B. if diseases and insects harmful to crops were going towards colder areas
C. if organisms were moving to the north and south poles
D. if the number of crop pests was increasing
2.According to Dan Bebber, if crop pests keep moving towards the poles, ______.
A. it will be hard for farmers to kill them
B. the most productive farmland will produce more crops
C. the earth will not produce enough food to support the world
D. the conditions for some crops may be improved
3.Which of the following is not a threat that farmers have to face?
A. Climate change helps crop pests to adapt to new environment.
B. Foreign species are brought in by trade.
C. Invasive species doing well in warmer places might do well in America.
D. The impacts of the climate and species changes on crops are not easy to determine.
4.The underlined word “amenable” in the fourth paragraph most probably means ______.
A. agreeable B. terrible C. unfriendly D. changeable
高三英语阅读理解中等难度题查看答案及解析
University of Pennsylvania researchers say that for the first time they have linked social media use to increases in depression and loneliness. The idea that social media is anything but social when it comes to mental health has been talked about for years, but not many studies have managed to actually link the two. To do that, Penn researchers, led by psychologist Melissa Hunt, designed a study that focused on WeChat, Snapchat and Instagram.
The study was conducted with 143 participants, who before they began, completed a mood survey and sent along photos of their battery screens, showing how often they were using their phones to access social media. "We set out to do a much more complete study which attempts to imitate real life." Hunt said.
The study divided the participants into two groups: The first group was allowed to maintain their normal social media habits. The other, the control group, was restricted to 10 minutes per day on social media. The restrictions were put in place for three weeks and then the participants returned and were tested for outcomes such as fear of missing out, anxiety, depression and loneliness.
The results showed a very clear link between social media use and increased levels of depression and loneliness. "Using less social media than you normally do would lead to significant decreases in both depression and loneliness," Hunt said.
Social media invites what Hunt calls "downward social comparison." "When you're online, it can sometimes seem that everyone else is cooler and having more fun and included in more things and you're left out," Hunt said. And that's just generally discouraging. "Every minute you spend online is a minute you are not doing your work or not meeting a friend for dinner or having a deep conversation with your roommate." And these real life activities are the ones that can encourage self﹣esteem and self﹣worth, Hunt added.
"People are on their devices, and that's not going to change," she said. But as in life, a bit of control goes a long way.
1.Before the study was conducted, the participants completed a survey to .
A. imitate people's real life
B. link loneliness to depression
C. show their use of social media
D. prove social media is important
2.The results of the study showed using less social media would result in .
A. people's fear of missing out
B. higher levels of depression
C. obvious relief in loneliness
D. lower levels of happiness
3.In Hunt's opinion, which activity benefits more to mental health?
A. Hiking out with friends.
B. Making comparison with others.
C. Playing computer games in spare time.
D. Logging onto social media and having fun.
4.Which can be the best title of the passage?
A. A Study on Social Media.
B. How to Improve Mental Health.
C. People Addicted to Social Media.
D. Social Media Influences Mental Health.
高三英语阅读理解困难题查看答案及解析
People often say that money talks. They mean that a person with a lot of money can say how he or she wants things done. But it is not easy to earn enough money to gain this kind of power.
Ask anyone in business. They will tell you that it is a jungle out there. The expression probably began because a jungle is filled with wild animals and unknown dangers that threaten people.
People in business have to be careful if they are to survive the jungle out there. They must not be led into making bogus investments. Bogus means something that is not real.
Nobody is sure how the word got started. But it began to appear in American newspapers in the 1800s. A newspaper in Boston, Massachusetts, said the word came from a criminal whose name was Borghese. Borghese wrote checks to people although he did not have enough money in the bank. After he wrote the checks, he would disappear. So, people who were paid with his checks received nothing. The newspaper said Americans shortened and changed the criminal’s name Borghese to Bogus.
People trying to earn money must be also aware of the risk of being ripped off. A writer for a magazine said he first saw the expression used in 1971. It was on a sign that a student carried during a protest demonstration at a university. The message on the sign was that the student felt cheated.
To be successful, a person in business works hard and tries to get down to brass tacks. This expression means to get to the bottom or the most important part of something. For example, a salesman may talk about his product without saying the price. You get down to brass tacks when you say, “it sounds good, but how much does it cost?”
Word expert Charles Funk thinks the expression comes from sailors on ships. They clean the bottom of a boat. When they have removed all the dirt, they are down to the copper pieces that hold the ship together. So, if we get down to brass tacks, we can prevent rip-offs and bogus ways of earning money in that jungle out there. And, some good luck will help, too.
1.Why do people say money talks?
A. Because the rich tend to decide a thing.
B. Because money can tell us something.
C. Because it is hard to earn much money.
D. Because everyone loves to have money.
2.My uncle is in a jungle out there, which means .
A. he will fight against wild animals
B. he is interested to go through a jungle
C. he will face many difficulties soon
D. he is a success in his own business
3.When you ask how much it cost, it means .
A. you declare you won’t be cheated
B. you get down to the real issues
C. you care nothing about the quality
D. you are always caring about money
4.It can be inferred from the passage that .
A. many English words have their interesting stories
B. brass is a necessary piece of equipment of a ship
C. many businessmen have been cheated in life
D. Charles Funk has created many interesting words
高三英语阅读理解中等难度题查看答案及解析