Dogs greet other dogs nose-first, as it were sniffing each other from fore to (especially) aft. People are not quite so open about the process of sniffing each other out. But there is also evidence that human beings can infer kinship (亲属关系), deduce emotional states and even detect disease via the sense of smell.
Now, Inbal Ravreby, Kobi Snitz and Noam Sobel of the Weizmann Institute of Science, in Israel, have gone a step further.
They have shown, admittedly in a fairly small sample of individuals, that friends actually smell alike. They have also shown that people pick friends at least partly on the basis of body odour (气味).
As they report in Science Advances, Dr Ravreby, Dr Snitz and Dr Sobel started their research by testing the odours of 20 pairs of established, non-romantic, same-sex friends. They employed an electronic nose (e-nose) and two groups of specially recruited (招聘的) human “smellers”. The e-nose used a set of metal-oxide gas sensors to assess t-shirts worn by participants.
One group of human smellers were given pairs of these shirts and asked to rate how similar they smelt. Those in the other group were asked to rate the odours of individual t-shirts on five subjective dimensions: pleasantness, intensity, sexual attractiveness, competence and warmth. All three approaches yielded the same result. The t-shirts of friends smelt more similar to each other than did the t-shirts of strangers.
Friends, in other words, do indeed smell alike.
To further understand whether friendship causes similarity of smell, or similarity of smell causes friendship, Dr Ravreby, Dr Snitz and Dr Sobel investigated whether e-nose measurements could predict positive interactions between strangers to develop a new friendship.
They gathered another 17 volunteers, gave them t-shirts to wear to collect their body odours, ran those odours past the e-nose, and then asked the participants to play a game.
Participants were paired up at random and their reactions recorded. After each interaction, they demonstrated how close they felt to their fellow game by overlapping (重叠) two circles (one representing themselves, the other their partner) on a screen. It showed that the more similar the two electronic smell signatures were, the greater the overlap.
1. What is the author’s purpose in mentioning dogs at the beginning of the passage?A.To raise some doubts. | B.To illustrate a point. |
C.To introduce the topic. | D.To impress the readers. |
A.By analyzing the charts | B.By describing the details. |
C.By comparing the results. | D.By explaining the theories. |
a. Participants were paired randomly.
b. Seventeen volunteers wore t-shirts.
c. Participants overlapped two circles.
d. The researchers ran smells past the e-nose.
A.b-c-d-a. | B.c-d-a-b. | C.d-c-b-a. | D.b-d-a-c. |
A.Pleasant body odours attract friends. |
B.Similar smells strengthen friendship. |
C.Friendship is based on same interests. |
D.Friends tend to have similar body odours. |
相似题推荐
【推荐1】Recently, the artificial intelligence app ChatGPT has been making headlines in the higher education media and beyond. Some have taken an alarmist approach, such as a recent Atlantic piece titled “The College Essay Is Dead.” Others have been more optimistic, examining the limitations of the app as well as offering suggestions for how it can inform student learning and writing. Below is an FAQ about ChatGPT.
Q: How can I design assignments to discourage use of ChatGPT?
A: One important strategy for preventing use of ChatGPT or other similar technologies is to create assignments that require students to show stages of their work (outlines, rough drafts, etc.).
Ask students to refer to course materials and discussions, which would be impossible for ChatGPT to access and would also promote valuable integration skills.
Ask students to engage in and submit a reflection about what they have learned from completing the assignment. Sample tips include: a) Discuss the most challenging and most rewarding aspects of your project. b) What was the most surprising thing you learned in the course of this project? c) If you had the chance to do it again, what one thing would you have done differently on this project?
Teach citation skills and research skills, including expression of original thought.
It is worth considering why you assign writing in your classes and discussing that clearly with students. For most professors, writing represents a form of thinking. But for some students, writing is simply a product, a collection of words repeated back to the teacher. According to John Warner, a blogger and author of two books on writing, “If you can create an atmosphere where students are invested in learning, they are not going to copy, and they are not going to dodge the work. But the work has to be worth doing on some level, beyond getting the grade.”
Q: How can I use ChatGPT in the writing process?
A: These types of apps are not going away and will no doubt rise sharply in the future, so encouraging students to use them productively could be seen as an important contribution to information competence.
1. What can we learn from the first paragraph?A.College essay is dead because of ChatGPT. |
B.ChatGPT offers suggestions only for students. |
C.There is no limitations to this app. |
D.ChatGPT is a hot issue in certain fields. |
A.Write an essay by referring to course materials. |
B.Write an essay about group discussion. |
C.Hand in homework with specific steps. |
D.Attach your paper with citations. |
A.Making sure students are actively engaged. |
B.Creating a happy atmosphere for students. |
C.Teaching students how to think wisely. |
D.Making learning an investment for students. |
A.ChatGPT: A Smart Artificial Intelligence App |
B.ChatGPT: A Useful Tool for Student Learning and Writing |
C.ChatGPT: Assignments Created for Students |
D.ChatGPT: A Double-edged Sword for Teaching and Learning |
【推荐2】On December 14, 1972, three NASA astronauts (宇航员) left the moon. Two had just completed their stay there for NASA’s Apollo 17 mission (任务). During that time, astronauts Eugene Cernan and Harrison Schmitt walked across the lunar (月球的) surface. Meanwhile, astronaut Ronald Evans kept control of the command module. When the astronauts returned to Earth, they became the last humans to visit the moon.
Now, about 50 years later, astronauts are getting ready to go back. But this time will be different. On November 16, 2022, NASA launched (发射) its Artemis 1. The agency’s new Space Launch System rocket lifted off in Florida and began its first voyage toward the moon. No one was on board. But the mission tested new technologies that eventually will bring astronauts back to the moon, including the first woman.
Jose Hurtado, an expert at the University of Texas at El Paso, said, “It was a great launch. What I love is about space exploration, so it was really stirring.” He found it an inspirational view, hoping everybody watching it got that inspiration.
NASA’s Apollo program took place in the 1960s and 1970s.Its crewed missions to the moon ran from 1968 to 1972. In July 1969, the Apollo 11 mission landed the first astronaut on the moon. Over the next few years, five more flights brought 10 more American men to the sky.
Once Apollo ended, NASA shifted its focus to space stations as preparation for longer human spaceflights. America’s first space station, Skylab, launched in May 1973, hosted four crews of astronauts that year and the next. But Skylab was meant to be only a temporary station. Within several years, it broke apart in the atmosphere.
NASA astronauts won’t be the only people exploring the lunar surface. China aims to land its own astronauts at the moon’s south pole within the next decade.
1. When did the last Apollo moon landing happen?A.In 1968. | B.In 1969. | C.In 1972. | D.In 1973. |
A.To test an American new rocket. |
B.To land at the moon’s south pole. |
C.To build America’s first space station. |
D.To prepare for man’s return to the moon. |
A.Tiring. | B.Simple. | C.Similar. | D.Exciting. |
A.China’s inspiration of getting to the moon. |
B.NASA started to focus on the space station. |
C.China’s efforts to send astronauts to the moon. |
D.NASA astronauts explored the lunar surface. |
【推荐3】The traditional working day doesn't benefit night owls(夜猫子),with people who prefer to stay up late twice as likely to underperform at work as early birds ;a new study from Finland has6uggested.
Early risers tend to work better early in the morning, while evening types are the opposite. The researchers asked 5,881 individuals born in 1966 in northern Finland about their working life and health and questioned them about their sleep patterns in 2012 when they were 46 years old. The study participants were monitored over a period of four years.
Ten percent of the men and 12% of the women were "evening types", 72% of whom worked in day jobs,the researchers found. A quarter of people classified as evening types rated their own performance at work as poor. This was a significantly higher proportion(比例) than among early birds.
"If evening types have to work in the early morning, they won't rate their work ability as high as morning types. The opposite would be true as well. If normal business hours were 3 p.m. to 11 p.m., the early morning types would feel worse than evening types," said Kristen Knutson, an associate professor at Northwestern University.
Suzanne Hood, an associate professor at Bishop's University in Qucbec, Canada, said that night owls shouldn't be alarmed by the findings.
"Rating job performance doesn't necessarily tell you about the quality of the work in real terms," noted Hood. "Also, the study was observational—it doesn't mean that being a night owl makes you less able to work."
"For example, the employee who seems like a slow starter in the morning might be the person who's most able to work effectively into the evening to meet an important deadline," said Hood. "If there is some opportunity for flexibility in scheduling, allowing employees some control over what time of day they complete their work may help to optimize(优化) performance and productivity."
1. What do we learn about the study from Finland?A.It lasted from 1966 to 2012. |
B.It was conducted mainly in the lab. |
C.72% of participants were early birds. |
D.A minority of participants were night owls. |
A.Objective. | B.Worried. |
C.Supportive. | D.Unconcerned. |
A.Starting early in the morning. |
B.Choosing different work schedules. |
C.Following normal business hours. |
D.Finishing one's work later than usual. |
A.Night Owls Tend To Perform Badly At Work |
B.Early Birds Are More Likely To Gain Advantages |
C.Are You A Night Owl? Blame It On Your Genes |
D.Which Do You Prefer, Morning Type Or Evening Type? |
【推荐1】Air pollution may be causing baldness, scientists have shown for the first time. A new study found that fine particulate matter emitted by cars would damage the skin that holds hair follicles in place. A series of laboratory tests on human cells showed that levels of the crucial proteins needed for hair to grow and be retained decreased when they were exposed to pollution particles. While there is a growing body of evidence showing how these tiny particles can damage internal health, including by entering the bloodstream through the lungs, this is the first to demonstrate such a risk to the surface of the body.
The study was conducted by exposing cells from the human follicle dermal papilla cells (HFDPCs) ,to various concentrations of PM10-like dust and diesel particles. After 24 hours the researchers performed a process, known as western blotting, to detect the levels of specific proteins in the cells.
The results showed that the presence of PM10 and diesel particles decreased levels of B-catenin, the protein responsible for hair growth. The study also revealed that the levels of three other proteins—cyclin DI, cyclin E and CDK2, which are responsible for hair growth and hair retention, were decreased by PM10-like dust and diesel particles in a "dose-dependent" manner.
Dr Hyuk Chul Kwon, who led the study at the Future Science Research Centre, said, “While the link between air pollution and serious diseases such as cancer and lung diseases is well established, there is little-to-no research on the effect of particulate matter exposure on the human skin and hair in particular. Our research explains the mode of action of air pollutants on HFDPCs, showing how the most common air pollutants lead to hair loss. ”
Sources of PM include the burning of fossil fuels--petrol and diesel, as well as other solid fuels, and other industrial activities such as building, mining and the manufacturing of building materials like bricks.
“While it is difficult to escape from the surrounding pollution, limiting the time for walking in busy streets, especially during rush hour, should help reduce exposure, ”said Dr Kwon. "If you are exercising outdoors, try to do so in areas that are less polluted and do not spend too much time waiting at traffic hot spots such as traffic lights. "
1. What did the new study find?A.Air pollution can do great harm to our lungs. |
B.The color of our skin can be influenced by air pollution. |
C.Serious air pollution can probably prevent hair from growing. |
D.Air pollution can affect hair growth by entering the bloodstream. |
A.His new research is superior to previous research. |
B.The research he conducted is really of great importance. |
C.The results of his new research need to be further improved. |
D.A link between air pollution and diseases needs to be established. |
A.To do as much exercise as possible. | B.To take action to reduce air pollution. |
C.To avoid being exposed to air pollution. | D.To take public transport to avoid traffic jams. |
While many people in China remember Confucius on his special day, few people in the United States will give him a passing thought. It’s nothing personal. Most Americans don’t even remember the birthdays of their own national heroes.
But that doesn’t mean that Americans don’t care about Confucius. In many ways he has become a bridge that foreigners must cross if they want to reach a deeper understanding of China.
In the past two decades, the Chinese studies programs have gained huge popularity in Western universities. More recently, the Chinese government has set up Confucius Institutes in more than 80 countries. These schools teach both Chinese language and culture. The main courses of Chinese culture usually include Chinese art, history and philosophy(哲学). Some social scientists suggest that Westerners should take advantage of the ancient Chinese wisdom to make up the drawbacks of Western philosophy. Students in the United States, at the same time, are racing to learn Chinese. So they will be ready for life in a world where China is an equal power with the United States. Businessmen who hope to make money in China are reading books about Confucius to understand their Chinese customers.
So the old thinker’s ideas are still alive and well.
Today China attracts the West more than ever, and it will need more to introduce Confucius and Chinese culture to the West.
As for the old thinker, he will not be forgotten by people in the West, even if his birthday is.
1. The purpose or the first paragraph is mainly to ________.
A.attract the readers’ interest in the subject |
B.provide some key facts about Confucius |
C.show great respect for the ancient thinker |
D.prove the popularity of modern birthday celebrations |
A.take an active part in Chinese competitions |
B.try to get high scores in Chinese exams |
C.fight for a chance to learn Chinese |
D.show great interest in studying Chinese nowadays |
A.Forgotten Wisdom in America |
B.Huge Fans of the Chinese Language |
C.Old Thinker with a Big Future |
D.Chinese Culture for Westerners |
【推荐3】Named “America’s Finest City” due to its hospitality, beauty and ideal climate, San Diego is located on the border with Mexico. The residents are so active outdoors that it is called “Sportstown, the U.S.A.”. San Diego’s 70 miles of beaches are a heaven for swimmers, surfers, divers, boaters and sunbathers. Another favourite outside activity is golf. With 100 courses (about 50 of them public), San Diego is a golfers’ paradise. Many San Diego residents came here first as tourists, who were attracted by San Diego’s sunny beaches, nearby mountains and deserts, plus the cultural delights of any big city. The world-famous San Diego Zoo, SeaWorld Adventure Park, Wild Animal Park, museums and other attractions attract visitors from around the world.
The zoo is home to some 4,000 animals, including the world’s largest group of parrots. Animals are displayed in natural settings, and there is a petting zoo for children. By contrast, the Wild Animal Park is a wildlife preserve with an area of over 2,000 acres and more than 3,000 free-roaming (自由漫步的) animals in natural habitats.
In addition to housing the zoo, Balboa Park is home to several museums and attractions, including an aerospace museum, an art and history museum, the Old Globe Theatre, science museums and even a railroad museum. Free concerts are offered frequently. Another popular attraction is the SeaWorld, a 190-acre marine park.
San Diego’s varied attractions, as well as its business climate, offer many opportunities for students to explore the local culture, meet people from around the world, and gain business experience. At San Diego State University, for example, students in the American Language Institute’s study tour program learn English both in the classroom and while sightseeing.
1. What do the residents of San Diego probably like to do?A.Have sports outdoors. | B.Travel to other places. |
C.Stay at home. | D.Stay outdoors all day. |
A.Because it is more convenient to live here. |
B.Because they are attracted by its beauty and culture. |
C.Because they can make money from tourism here. |
D.Because it is a quiet place to enjoy themselves. |
A.The SeaWorld Adventure park. | B.The art and history museum. |
C.The petting zoo. | D.The Old Globe Theatre. |