“If you don't behave, I'll call the police”is a lie that parents might use to get their young children to behave. A new psychological(心理学的) study led by Nanyang Technological University, Singapore suggests that it is connected with harmful effects when the children become adults.
The research team asked 379 Singaporean young adults whether their parents lied to them when they were children, how much they lie to their parents as adults, and how well they respond adulthood challenges.
The first questionnaire asked these young adults to recall if their parents told them lies about eating, leaving or staying, spending money and so on. Some examples of such lies are “If you don't come with me now, I will leave you here by yourself”and“I don’t bring money with me today, we can come back another day”.The second questionnaire included questions that could show how often they lie to their parents as adults. Lastly, these young adults filled in two other questionnaires that asked them about their psychological problems and tendency (趋势)to behave selfishly and impulsively(冲动地).
Adults who reported being lied to more as children were more likely to report lying to their parents in their adulthood. They also said they faced greater difficulty in meeting psychological and social challenges.
Lead author Setoh Peipei from NTU Singapore's School of Social Sciences said, “Parenting by lying can seem to save time, especially when the real reasons behind why parents want children to do something are difficult to explain. When parents tell children that‘honesty is the best policy’,but display dishonesty by lying, such behavior can send negative messages to their children. Parents' dishonesty may finally erode trust and encourage dishonesty in children”
“Our research suggests that parenting by lying is a practice that has negative influence on children when they grow up. Parents should be aware of these possible risks and consider other ways to replace lying, such as knowing children's feelings, giving information so children know what to expect, offering choices and solving problems together, to encourage children to have good behavior, ”said lead author Setoh Peipei.
But the study has its limitations. Some limitations of the study include depending on what young adults report about their parents' lying. “Future research can explore using many informants(提供信息的人), such as parents, to report on the same thing”suggested Setoh.
1. What did the research team do during the study?A.They turned to 379 Singaporean children |
B.They looked for questionnaires on the Internet. |
C.They collected answers to some sets of questions |
D.They asked the young adults parents for information |
A.build | B.enhance | C.destroy | D.recover |
A.Parents can sometimes tell harmless lies to their kids |
B.Parents had better explain to their kids why they’ve lied |
C.Parents who like lying are more likely to behave selfishly |
D.Parents should use positive ways instead of lying during parenting |
A.Parents 'lying to children can influence them negatively |
B.Parents lie to children to save themselves some trouble. |
C.Children's behavior can be affected by their parents |
D.Children may lie more if their parents often lie. |
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【推荐1】“Being a sports fan is a very psychologically healthy activity,” says Daniel Warm, professor at Murray State University whose research program centers on the psychology of sport fandom(运动迷). Fandom connects us to other like-minded people, which satisfies our human need for belonging, he says.
These relationships are significant: People who identify as sports fans have higher levels of self-esteem, lower levels of loneliness and tend to be more satisfied with their lives compared to those who aren’t interested in sports, Wann says. Fans tend to have more access to social support, help and resources as well. Research suggests that when people have support from their communities, they have better health.
Beyond bonding, fans get to enjoy the psychological benefits of winning, even if they have nothing to do with the players or games.
Of course, teams sometimes lose. Prior to a sporting event, there’s at least a 50-50 chance that you’re going to be disappointed in your outcome.
So, why do people continue to put their faith behind teams that tend to lose? People who feel a strong psychological connection to a team are more likely to root for a team when they’re having a losing season.
“Sports random has nothing to do with the outcome of a game,” Warm says. For example, if a pizza restaurant continually got your order wrong, you’d likely switch to a more reliable parlor(店铺). But because being a fan is so central to people’s identities, people are willing to accept defeat and continue to be loyal to a team.
Being part of a fan community can also help people cope with losses. A 2019 study found that watching a football game with other fans helps to relieve the negative psychological effects of losing. For fans of the losing team, sharing the pain may have protected them from losing self-esteem.
“There are other things that random brings with it above and beyond the ability to enjoy the team’s successes,” Warm says. Watching sports can be a way to relieve stress, or spend time with family, he says.
To that end, some surveys suggest that activities like March Madness pools can reduce productivity. Any sort of fandom can be distracting, but Warm says that talking about sports at work and spending time with people who share a common interest can make people more excited to go to work.
However, if you find you’re consuming so much sports content that your work is suffering, or it’s impacting your interpersonal relationships, then it can be a sign you should tone it down, he adds.
1. What is the characteristic sports fans generally bear?A.Higher sense of self-worth. | B.Worse health conditions. |
C.Being ready to help others. | D.Various means of support. |
A.Fans are forced to be loyal to teams. |
B.Fans are good at sharing pains with teams. |
C.Fans are brave enough to accept losses. |
D.Fans own a great sense of identity and belonging. |
A.Leading to distraction. |
B.Making people too excited to go to work. |
C.Increasing people’s productivity. |
D.Impacting interpersonal relationships. |
A.A poster. | B.A textbook. |
C.A science fiction. | D.A magazine. |
【推荐2】In 1624 an English poet John Donne famously wrote, “No man is an island.” In recent years, neuroscientists have caught up with the wisdom of Donne. They recognize that our brain needs more than simply the food we eat, the oxygen we breathe, and the water we drink.
Normal brain functioning depends on the social web around us. Our neurons require other people's neurons to survive and thrive.
Social interaction doesn't just boost our mood, it feeds our brains.
Socialization is typically associated with healthy behaviors, like joining a walking group or a bowling league, or partaking (参与) in mentally stimulating activities, such as participating in a book club or playing bingo.
So if you're looking for a reason to linger at your weekly coffee date with the girls, or you’re your grandkids to the park, here it is. Socializing isn't just about having fun—it's about keeping your brain healthy.
A.We are deeply social creatures. |
B.Remember to spend some time with your loved ones. |
C.We need it to keep that specific circuitry in the brain healthy and functioning. |
D.There’s something else, something equally as important: it needs other people. |
E.Engaging with other people can also help a brain react to different situations and topics. |
F.When socializing involves activities such as these, the health benefits are increased greatly. |
G.Brains have traditionally been studied in isolation (孤立地). |
【推荐3】Breathing is something you do all day long, without even thinking about it. However, you might be doing it wrong. Research shows that the way you breathe affects the amount of oxygen (氧气) you take in,as well as how you think and feel.
So which is it? Do you breathe through your nose or your mouth? Some health experts recommend people breathe in through the nose and out through their mouth. Others say that people should just focus on breathing easily, paying no attention to their mouth or nose preference. But mouth breathing has also been connected with bad breath, high blood pressure and bad teeth.
Nose breathing may improve how memories are stabilized (稳定) in our brains, according to Swedish researchers. During the study, participants smelled 12 different smells and they were asked to breathe either through their nose or mouth for an hour afterwards. Then, they were presented with the original set of smells and a new set. Those who smelled with their nose remembered the smells better.
A research team recognized the differences in brain activity that happened when seven epilepsy (癫痫) patients breathed through the nose or through the mouth. The team found three areas of the brain where activity is connected with breathing. These areas showed more changes in brain activity only when volunteers breathed in through their noses.
So, should people breathing through the mouth change their breathing habits? If you’re happy with the way you breathe and you aren’t experiencing any health problems, be yourself and just keep your own way. But if you think it might be time for a change, focus on breathing through your nose until it becomes a habit. It might help you survive an emergency.
1. What does the underlined word “it” in Paragraph 2 refer to?A.Your life style. | B.How you breathe. |
C.How you think and feel. | D.The oxygen you take in. |
A.Nose breathing may improve memory. |
B.Mouth breathing causes health problems. |
C.People breathing through the nose identify smells difficultly. |
D.People breathing through the mouth have a good sense of taste. |
A.It helps one to stay healthy. |
B.It cures bad breath and snoring. |
C.It makes one’s brain more active. |
D.It improves one’s sense of smell. |
A.It’s hard to get used to. |
B.It’s suitable for everybody. |
C.It’s what people have to do. |
D.It’s what people can benefit from. |
【推荐1】“When a wildfire destroys a forest, what is a good choice for recovering what has been lost? Across the world, there have been many types of agriculture, so how do you affordably replant the destroyed land? And that’s where our technology comes in, ” says Grant Canary, CEO of DroneSeed, a Seattle developer of a drone (无人机) data platform. DroneSeed will fly drones to prepare for a new forest on top of the one that has been burnt. Carrying 57 pounds of tree seeds, the drones work in teams to find destroyed areas and spread seeds. They are six times faster than planting seedlings by hand. This can also help make the cost of planting seedlings 60-70% less than that of traditional reforestation (再造林).
DroneSeed can substitute for human tree planters. Tree planters do a valuable job well, but there are fewer tree planters due to the difficulty and low pay of the work. Meanwhile, the work of replanting a forest after a fire is beyond the abilities of human labor. Luckily, drones can send dozens of seed packets. This has many advantages. It removes unwanted and dangerous jobs from both planters and pilots whose near-ground work is difficult. A truck with a line of drones can prepare more and cover far more ground than human operations. And the process is easily observed and controlled.
Jay Zaveri, a partner at Social Capital, said, “Global reforestation is important in fighting against climate change, so we’ve helped DroneSeed from the very start. Since then, DroneSeed has put in its efforts to reforest land, found a successful way, and changed the experience of forest development.”
DroneSeed is a one-stop shop for reforestation services. DroneSeed has got a fund of $36 million. The company will use some funds to buy Silvaseed, a 130-year-old company, to expand (扩大) its seed collection and planting services. In addition, DroneSeed plans to expand further to meet the growing need for reforestation assistance by the middle of next year. And it will add more reforestation projects and expand its services to more places in the future.
1. Why does the author mention Grant Canary’s words?A.To tell us the serious damage of wildfires. |
B.To point out the difficulty of saving burned forests. |
C.To show the importance of environmental protection. |
D.To introduce the idea behind DroneSeed’s technology. |
A.It develops high-tech drones. | B.It works for forest rebuilding. |
C.It can find wildfires in advance. | D.It joins hands with local farmers. |
A.Train. | B.Encourage. |
C.Take the place of. | D.Provide protection for. |
A.DroneSeed has done an amazing job in reforesting destroyed land. |
B.DroneSeed’s method should be applied to more areas. |
C.People should pay more attention to climate change. |
D.Global reforestation has made very little progress. |
【推荐2】When you imagine a robot, you might picture R2-D2 in Star Wars, but there’s a new robotic system called particle robotics that is changing what it means to be a robot.
Looking like some kids forgot to pick up their toys, the robot is a collection of plastic disks (圆盘). The designers refer to each disk as a “particle”. Alone, a single disk can’t do much of anything. But when working as a system, they become what the designers call a “particle robot” and can do simple tasks.
Scientists behind the project were inspired by nature. In the human body, for example, individual cells (细胞) work together as muscle tissue. Many other types of cells also move together as a group. The robot moves in the same way.
Tiny magnets (磁铁) on the disks’ outer rims (边缘) make them stick together. When one disk expands or shrinks (放大或缩小), it pushes or pulls on its neighbors. When all of those small pushes and pulls add up, suddenly the robot starts to move — very slowly.
Even though the disks don’t communicate directly with each other, they can act as a group. The scientists showed this by fitting sensors on each disk that could recognize light. Then they programmed the disks to expand and shrink faster or slower, depending on how strong the light was. When the researchers shone a bright light, the robot slowly moved toward it — the result of all those individual expansions and shrinks.
Right now, the robot only moves across a smooth surface. It is believed that future robots, such as this one, will continue to copy nature, influencing how they might look and move. There will be more and more biologically based designs.
1. What can we learn about the new robot?A.It is similar to R2-D2. |
B.It moves at a fast speed. |
C.It can work in poor conditions. |
D.It becomes smart when its parts team up. |
A.They did it by chance. |
B.They got the idea from nature. |
C.They based it on a kind of toy. |
D.They were influenced by Star Wars. |
A.Other disks. | B.Other robots. |
C.Tiny magnets. | D.Outer rims. |
A.move at will |
B.sense danger |
C.take different forms |
D.act under the influence of light |
【推荐3】In 2018, Russian scientists took a soil sample from deep in the permanently frozen ground in Siberia in Russia. They discovered two tiny round nematodes (线虫) frozen in the sample, which were so small that they could only be seen with a microscope. Tests showed the soil had been frozen for about 46,000 years old. When the nematodes were placed in room temperature, they began to move. The nematodes are the oldest living animals ever brought back to life after being frozen. The discovery makes up for the research on how living things can survive in tough conditions.
Nematodes can live for years if they’re frozen. They can enter a special state called cryptobiosis (隐生现象) , during which animals reduce their activities and consume very little energy. Before this, the longest nematode had been known to survive through cryptobiosis was about 25 years. Being revived after 46,000 years was a new record for any kind of animal.
The nematodes were sent off to Germany to be studied further. The researchers found the two nematodes were a new species of nematode that had not yet been discovered. That’s not too surprising, since there are so many species of nematodes. They also found the nematodes were able to survive being frozen better if they were dried out a little first. The drying helped them produce a special sugar called trehalose (海藻糖), which helped them survive being frozen. The scientists also studied a nematode species that is common these days. They found that it also uses the sugar to protect itself in cryptobiosis.
Both of the nematodes were females. Before long, they began to have babies. Some kinds of nematodes, including these, have the ability for a single nematode to have babies all by itself. The two original frozen nematodes have now died. But their babies had babies who had babies, and so on. Most of the nematodes only live a month or two unless they get frozen.
1. What do we know about the two nematodes in the first paragraph?A.They were the oldest living animals. |
B.They were still alive when warmed up. |
C.They were found on the surface of the ground. |
D.They were the tiniest creatures ever discovered. |
A.It slows down the pace of their life. |
B.It helps them speed up their drying. |
C.It gets their body temperature down. |
D.It stops them from consuming energy. |
A.Cryptobiosis. | B.Trehalose. | C.Their sex. | D.Dry condition. |
A.Female nematodes live longer than the male ones |
B.Nematodes can produce young when they are frozen |
C.Nematodes are ranked the fastest producing creatures |
D.Short-lived nematodes survived for thousands of years |
【推荐1】The people of La Gomera can carry on long-distance conversations by whistling. For ordinary conversation they speak Spanish. But when they need to speak over a distance and ordinary speech is impossible, they use silbo, which is the name of whistled form of speech.
La Gomera is very mountainous. In spite of the island’s small size, walking from one place to another may be a slow and difficult job. That is why the silbo is so useful to the islanders there. A message can easily be whistled over a couple of miles, while to travel the same distance on foot might take an hour.
A good whistler can be heard and understood five miles away. His whistling can be heard even farther away when there is little or no wind. 1 was informed that the record is about nine miles. Anyone who has heard a first-class whistler will agree that this figure is quite possible.
A whistle doesn’t have all the changes of tone. To achieve changes, the whistler tries to perform the same movements with his teeth, mouth, tongue and throat that he would use as if he were actually talking. Of course he cannot move his lips during the whistling, so there is some difference. However, it is close enough. Each whistler has his own style of whistling, just as you would recognize him by the way he spoke. Anything that can be said in Spanish can be whistled and understood perfectly. This is true partly because the Spanish language has such a simple sound system. The silbo would not work nearly so well with English.
1. From the passage, we know silbo is .A.a name of an island | B.a name of a mountain |
C.a whistle language used at La Gomera | D.a whistle language used in Spain |
A.they can’t have long-distance conversations without whistling |
B.they want to save time |
C.they live on a small island |
D.the whistle sounds pleasant |
A.1 mile away | B.2 miles away |
C.4 miles away | D.5 miles away |
A.each whistler has his own style of whistling |
B.each whistler can make a tone of astonishing loudness |
C.some whistlers do not use their fingers at all |
D.there is nothing unusual about his whistling |
【推荐2】This could be the perfect gift for the partner, who embarrasses you on the dance floor. Smart socks, which can teach to dance, may be the answer for anyone with two left feet.
The socks have been developed as a running tool to help runners improve their skills. Thanks to the socks, users can accurately record not only how far and fast they run but also how well. It means the user maximizes their performance, and reduces damage to body and prevents hurt. The hi-tech socks are made of special fibers that watch the movements of your feet. They look, feel and can be washed like normal clothes.
Sensors (传感器) record each movement and send it by an ankle transmitter (脚踝发射器) to a smart phone. Then a “virtual coach” application shows the information and can tell the user what they are doing wrong, and help to improve skill in any task with feet.
The socks should be useful to athletes and weekend joggers. “People think running is so easy and of course everybody can do it but not necessarily safely and well,” Dr. Davide Vigano said. A recent study showed that between 60 and 80 percent of runners got hurt per year. This is pretty much more than any other human activity. Researchers say the technology can also be developed to teach people how to dance, play sports such as golf, or even to help to teach women to walk better in high heels.
Mr. Vigano said, “People could all benefit from the idea. We have had interest from all sorts of sports, like skiing, football, cycling and golf. Anything where you have to use your feet can use it. It could even be put in high heels to help women walk in them safely.”
Socks are just the start, and the technology could be used in gloves, hats and boots. The socks, anklet and software package, are expected to be sold for around£120, which will go on sale in March.
1. What does the underlined part “anyone with two left feet” refer to?A.People who are disabled. |
B.People who are interested in dancing. |
C.People who are not good at dancing. |
D.People who invented the socks. |
A.They feel much softer than normal clothes. |
B.They can monitor the movement of feet. |
C.They are expensive to produce. |
D.They act as a smart phone for users. |
A.They can improve the skill of running. |
B.They can help women walk better in high heels. |
C.They can teach people to dance well. |
D.They can be worn for days without washing. |
A.everyone can make good use of the smart socks |
B.users can run as fast as they like with the socks |
C.60 to 80 percent of runners would like to buy the smart socks |
D.no runners will get hurt, thanks to the socks |
【推荐3】Body Language in the United States
Most people shake hands and make eye contact when they meet people for the first time. Among very good friends, a woman may give another woman a little hug, and a man may kiss a woman quickly on the cheek. Males don’t hug one another, which, however, is changing. Men usually shake hands with the right hand. Sometimes they use the left hand to either cover the handshake or lightly hold the other persons arm. This shows greater warmth and friendship. What’s more, most people wave hello or good-bye. This is important to know because in many other countries, the same movements mean “no”.
When people are waiting in a public place, such as the post office, they usually form lines. Some people get angry and complain if someone jumps ahead of other people. Moreover, many women like men to open doors for them. They also like men to give up their seats on public transportation. However, some women do not like this type of behavior. They feel that men and women should be treated in the same way.
In the United States, it’s important to make direct eye contact in business and social situations. If you don’t make eye contact, people will probably think that you are bored or not interested. If there is silence in these situations, people usually try to make conversation. People in the United States usually stand about one arm’s length away from each other while talking or standing together. This space is called “the comfort zone”.
In the United States, mothers sometimes show that they are angry with children by shaking an index finger (食指) at them. People may show that they like children by patting them on the head.
1. It can be inferred from Paragraph I that in the United State ________.A.males begin to hug each other now | B.a man usually kisses a woman for greeting |
C.people only use right hands to shake hands | D.people wave good-bye as people in many other countries do |
A.they think sitting is harmful for health | B.they prefer to stand rather than sit |
C.they like to be treated equally | D.they don’t need men’s favor |
A.the comfort zone | B.impolite body language |
C.body language in public places | D.body language in business and social life |
A.love | B.anger | C.boredom | D.satisfaction |
【推荐1】As the birthplace of kites in the world, Weifang, Shandong province of China, produces beautiful, vivid, colorful and high-quality kites. Now, more than 70% of kites in the world are exported from Weifang. If you want to see various shapes and sizes of kites covering the sky, you cannot miss the Weifang Kite Festival held on the third Saturday of every April.
But this year, tens of thousands of Chinese participants gathered in Weifang, from Sept 26 to 29 for the 37th International Kite Festival. Held since 1984, the International Kite Festival is an annual event to “exhibit the excellence of the kite lovers to the public,” according to the festival's website.
During the festival, kite lovers can enjoy stunt (特技表演) kite flying, also known as aerial ballet. Controlled by either a single person or a group, the kites form different shapes in the air. People always devote a lot of time and wisdom to making their own kites. From animals that crawl (爬行) on the ground or swim in the water to legends like Monkey King, everything can fly in the sky at the festival. One of this year's highlights was the giant kites decorated with images of medical staff and the Long March 5 rocket, which reflect the hot topics this year.
“Flying a kite is like flying your dream. All the cultural symbols from ancient and modern times can be found in the sky of Weifang,” noted Medium. After more than three decades of development, the festival has become a place to appreciate kites. But most importantly, it serves as a unique cultural event to promote international exchange.
1. What does the text mainly talk about?A.A kite festival. | B.A kite birthplace. |
C.The future of kites. | D.Kite performances. |
A.To enjoy animals flying in the air. | B.To show kite-lovers' brilliance. |
C.To perform specialized kite flying. | D.To enhance Weifang's global impact. |
A.It takes a lot of trouble to make a kite. | B.Stunt kite flying is the only highlight. |
C.Imagination can be shown in the kite. | D.Decorations matter least in the show. |
A.It helps organize an international event. |
B.It offers tips on how to appreciate kites. |
C.It helps make the place known worldwide. |
D.It enhances international cultural exchange. |
【推荐2】Machu Picchu was a city of the Inca Empire (帝国).It is sometimes called the "lost city“ because the Spanish never discovered the city when they controlled the Inca in the 1500s.
One of the most amazing things about Machu Picchu is its location. It is 8 ,000 feet above sea level on top of a mountain in the Andes in southern Peru. Three sides of the city have cliffs that drop over 1 ,400 feet to the Urubamba River. At the fourth side of the city is a high mountain.
Researchers believe that the city was first built around the year of 1450. Building work likely continued on the site until the empire was controlled by the Spanish in the middle 1500s.
Machu Picchu was built as a place for the ninth Inca King, Pachacuti. Researchers aren't sure why he built it, however. There are a number of ideas as to the reason. One idea is that it was a vacation place for the king. It is in a Vacation place than the capital city of Cuzco. It is also in a beautiful location and would have been a nice hiding place for the king. Another idea is that it was built as a religious site. Machu Picchu was not a large city. Probably only around 1,000 people lived there.
Most of the buildings were built with stones that were fitted together tightly without the use of mortar (砂浆).This style of building helped the buildings to stay complete during earthquakes. The Inca didn't use the wheel, so most of the hardwork was done by people. It would have taken hundreds of workers to move the large stones around the site.
The city was rediscovered in July 1911 by an explorer Hiram Bingham. He was led there by a local boy named Pablito Alvarez. Later, Hiram wrote a book about the city called Last City of the Incas.
1. What can we learn about Machu Picchu?A.It's close to the Urubamba River. |
B.It's controlled by the Spanish now. |
C.It's surrounded by cliffs from every side. |
D.It’s on top of an 8 ,000-foot-tall mountain. |
A.Deep narrow valleys. | B.Long rivers. |
C.High sharp rocks. | D.Huge mountains. |
A.To stay safe during earthquakes. |
B.To make it the capital city. |
C.To stay cool during the summer. |
D.To use it for some religious reason. |
A.The process of building Machu Picchu. |
B.Some basic facts about Machu Picchu. |
C.The rediscovery of Machu Picchu. |
D.The location of Machu Picchu. |
【推荐3】Playing tennis regularly could help keep people off death, but football, rugby and running may not help people to live longer, a study suggests.
A study followed more than 80,000 people for an average of nine years to find out if certain sports protected them against early death. It found that people who played racket sports regularly were the least likely to die over the study period, reducing their individual risk by 47 percent compared with people who did no exercise. Swimmers also reduced their chance of death by 28 percent, aerobics (有氧运动) fans by 27 percent and cyclists by 15 percent. Yet running appeared to have no impact at all on dying early, and neither did playing football or rugby.
Scientists say the difference may lie in the social aspect which goes alongside sports like tennis and squash (壁球), which often involve clubs and organized activities outside of the game. It means that people often have larger social net-works and tend to keep up activities into later life, both of which are proven to be good for health.
In contrast, people who play team sports often do not move onto a new sport once their teams break up for family, or injury reasons. They become watchers rather than participants in their chosen activity.
The researchers found that playing racket sports was associated with a 56 percent lower risk from heart death. Similarly, swimmers lowered their heart disease or stroke risk by 41 percent, and people who took part in activities like aerobics, dance or gymnastics lowered their risk by 36 percent. But again running, football and rugby had no significant impact on heart deaths.
However, other experts argue that this study must not be misinterpreted as showing that running and football do not protect against heart disease. In this study both runners and footballers had a lower rate of death from heart disease.
1. Which sport has hardly any impact on protecting people against early death?A.Cycling. | B.Swimming. |
C.Rugby. | D.Tennis. |
A.Playing basketball with their friends occasionally. |
B.Watching football games every day. |
C.Taking up gymnastics and joining a club. |
D.Doing running in the park every day. |
A.Social networks. | B.Staying at home. |
C.Physical examinations. | D.Setting up families. |
A.Thousands of people participated in a 9-year research. |
B.Study finds playing tennis helps people live longer. |
C.It is wrong to say running has no impact on heart disease. |
D.There are differences between racket sports and team games. |