It is a question that has confused parents for many years: why do children refuse to eat greens?
Now, two American experts believe they have the answer.
After studying dozens of babies as they played with various objects, the researchers noted that they were far more unwilling to touch plants than other things. They believe this is because evolution (生物进化) has biologically made children be wary of plants.
Due to susceptibility (敏感性) to illness or injury in the early years of life, the body has designed an inner defence mechanism (内部保护机制) that limits a child’ s contact with plants, they think. The researchers believe this is why children turn their noses up when faced with a plate of broad beans.
The findings are published in a paper by Dr. Annie E Wertz and Dr. Karen Wynn, both psychologists at Yale University.
They wrote, “Throughout human evolution... plants have been important in human’s life. Yet, for all of these benefits, plants have always caused very real dangers.”
“Plants produce toxins (毒素) as defences that can be harmful, or even deadly. Some plants also produce physical defences, such as thorns (荆棘) can damage tissues (组织) and cause effects over the whole body.”
They added, “We predicted that babies may have behavioural strategies that reduce dangers caused by plants.”
To test their theory, the researchers studied how children aged eight to 18 months old reacted when presented with a variety of objects. It took much longer for children to grab plants; objects that were pretended to look like plants also caused a slow response time.
For parents attempting to spoon some peas into the mouth of their child, this finding should come as welcome relief.
1. The underlined word “they” in Paragraph 3 refers to_____?A.the parents | B.the researchers | C.the babies | D.the plants |
A.Curious | B.Afraid | C.Tired | D.Certain |
A.They choose to make more man-made things. | B.They didn’t allowed their children to touch plants. |
C.They chose to have little contact with plants. | D.They tried very hard to escape from the past. |
A.They were important, in spite of danger. |
B.They reacted badly to human evolution. |
C.They contributed to the most deaths and illness. |
D.They developed human physical defenses against dangers. |
A.Why some plants are harmful. | B.How humans react to plants. |
C.Why children don’t like to eat greens. | D.When children from behavioural strategies. |
相似题推荐
【推荐1】Imagine a perfect day: the weather is good and everything seems fine. When, suddenly, your mobile phone loses its signal, the television has no programmes, and you can’t get online with your computer.
What has happened? These are just the types of problems a solar storm (太阳风暴) might cause. You may not think of storms as putting our society in danger. But today, a solar storm is as serious as other bad events, such as earthquakes.
A solar storm is caused by solar flares (太阳耀斑): large explosions (爆炸) near the Sun that can give off lots of energy. The strong energy can stop the satellite systems (卫星系统) that control our computers, telecom networks and so on. These storms can even cause the power to go out for weeks or months.
Scientists have recorded some of the strongest sun flares in years. One happened around Valentine’s Day, 2011. It caused radio and satellite signals to go down in some northern cities in China.
“Solar flare activity is going to be much worse than what we’ve seen in the past. We’re not talking about a few cities losing power, it could be half of the country, may be more,” SolarStormWarning.com, a US website about space weather, warned.
Scientists say that little can be done to predict such a storm. Governments around the world are trying to work together before the next storm, although they are not sure when that may happen.
1. From the first two paragraphs we can know solar storms are ________ our society.A.good for | B.far from | C.seldom in | D.harmful to |
a. Solar flares give off lots of energy. b. People cannot get online with their computers.
c. Solar storms happen. d. Satellite systems are stopped.
A.a-b-c-d | B.a-c-d-b | C.c-a-b-d | D.c-b-a-d |
A.a solar storm stopped | B.an earthquake happened |
C.a strong sun flare happened | D.the satellite systems didn’t work |
A.To introduce what solar storms are to people. |
B.To ask people to prevent the solar storm from happening. |
C.To tell people how to solve the problems caused by solar storms. |
D.To call for scientists to predict when the next solar storm will happen. |
【推荐2】If you decide to lose weight, you may prepare a healthy meal, exercise and drink a lot of water. But what if there is something you can do while you're sleeping that can help lose your weight?
Actually (事实上), the way is by going to sleep earlier. According to a study at the Salk Institute, the longer we stay up, the more calories (卡路里) we will take in.
There are more advantages in getting more sleep, too. Sleeping for less than eight hours is harmful for your weight loss progress, according to a study carried out by Annals of Internal Medicine. The study notes that lack of sleep can actually slow down weight loss and that people who sleep only 5.5 hours have less fat loss than those who sleep 8 hours.
All of these facts mean that just a simple change in your daily life can help you reach (实现) your weight loss goal. So let's go to sleep earlier!
根据材料内容选择最佳答案。
1. How does the writer start the text?
A.By telling a story. | B.By raising a question |
C.By answering a question. | D.By giving an example. |
A.Because it will help lose the fat. | B.Because it will change people's lifestyle. |
C.Because it will go up the speed of fat growth. | D.Because it will make us take in fewer calories. |
A.利用B. 改善C. 提高D. 不足 |
A.The ways to lose weight. | B.The best time of going to bed. |
C.Sleeping can help lose weight. | D.Staying up late can help lose weight. |
A.Culture. | B.Travel. | C.Nature. | D.Life. |
Why do we love sugar so much?
Many scientists believe our love of sugar may actually be hard to stop. When we eat or drink sugary foods, the sugar enters our blood and makes us feel good. Then the good feeling goes away, leaving us wanting more. All tasty foods do this, but sugar has a very strong effect.
“Every time I study an illness and try to find out the first cause, I find my way back to sugar,” says scientist Richard Johnson. One-third of adults worldwide have high blood pressure, and up to 347 million have diseases.
Our bodies are suitable to live on very little sugar. Early humans often had very little food, so their bodies learned to be very good at storing sugar as fat.
A.So what is the good way to solve it? |
B.It is believed that sugar is one of the causes. |
C.But there are those who are fighting back against sugar. |
D.In this way, it is in fact something harmful to our health. |
E.In this way, they had energy stored for when there was no food. |
At some point in life, many people develop a mental (精神) problem.While most people get over it, for others it doesn’t go away easily.
The WHO says that about 20 percent of teenagers worldwide suffer from mental illness. It’s thought that it will become one of the main causes of illness, and even death.
In China, the picture isn’t bright, either. About one tenth of teenagers under the age of 17 have a mental health challenge.
“The world is changing fast. Study and relationships have always caused stress, but today the stress is much higher than before,” the WHO said.
A research centre in Oxford University says that young people today have big stresses at school. For example, they experience bullying (欺凌). In a 2017 report, the centre noted that the Internet was a special source (渠道) of stress. Online, young people often see “messages about perfection” and this causes the young “great uncertainty about their futures”, says the centre.
Also, according to China Daily, Chinese people don’t ask for help with their mental problems. They fear that others will think less of them if they say that they are in mental trouble. Elaine Peng, a US mental health educator, makes a similar point. And in the UK over three quarters of young people believe their mental problems have a social shame. It is reported in 2017 that a quarter of young UK people wouldn’t ask for help if they developed a mental problem.
Young people who don’t ask for help for their condition may be creating problems for themselves in the future. Elaine Peng warned that, “If we hide our mental health, it may remain a problem forever.”
“My message for young people is, if you feel something is wrong within you—ask for help,” he told China Daily.
1. More and more teenagers develop a mental problem all over the world.2. Mental illness is easy to get over.
3. Being bullied is the biggest stress that teenagers experience.
4. Many people with mental problems don’t ask for help because they are afraid of being laughed at.
5. Elaine Peng advised teenagers with mental trouble to ask for help as soon as possible.
【推荐2】As space science develops, man has learned more and more about space. Space is not only amazing but also dangerous. While working in space, spacemen are facing danger as well as success. Scientists have found out that the radiation(辐射)is the greatest danger to spacemen in space. When spacemen are working in space, they are in danger of the radiation from the Sun and other stars, which is bad for their health. The harm of the radiation won’t be found until their children even grandchildren are born. Some special medicine may work a little, but no really effective medicine has been found so far.
Space rubbish is also thought to be a great danger to spacemen. It’s reported that there were 9, 000 man-made things flying in space. About 30% of these are satellites, 10% are spaceships, and the rest are space rubbish. An explosion(爆炸)in space in 1999 made a cloud of 300, 000 fragments, each at least 4mm in size. A small piece of these even knocked a spaceship window and caused some damage(损坏).
Scientists are watching and reporting any possible danger all the time. They are working to deal with space rubbish. Although space is really dangerous, it interests many people on the Earth. In the near future, it may be possible for people to spend a few days in a space hotel. We may even choose to leave the Earth and live in space in a few years. So we should do something to help improve the space environment.
1. Which of the following shows the man-made things in space in the correct way?A. | B. |
C. | D. |
A.good | B.helpful | C.useful | D.harmful |
A.碎片 | B.泡沫 | C.烟雾 | D.飞碟 |
A.Scientists have found out ways to solve any problems in space. |
B.Every one of us can have a travel to space in ten years. |
C.The harm of the radiation may be found in the spacemen’s children. |
D.Space is really dangerous, so it doesn’t interest anyone on the Earth. |
【推荐3】Car Free Day began in France on September 22, 1998. It aimed to make people realize the bad effects that cars had on the quality of life in cities. Later, it became a worldwide event. Now it has been celebrated around the world by more than 100 million people in about 1,500 cities. On this day, people are encouraged to give up driving private cars and take public transport(交通) so that they can experience their local area free from traffic. The purpose of this event is to draw people’s attention to environmental protection.
Many cities in China also celebrate this event every year. In 2004, Chengdu encouraged people to ride a bicycle on Car Free Day. In 2005, Xuzhou celebrated its first Car Free Day, whose theme was “Focus on the blue sky and white clouds”. On September 22, 2015, cars were restricted in three areas in Beijing from 9:00 a.m. to 16:00 p.m. Only pedestrians(行人) and bicycles were permitted to pass.
In the past four years, Car Free Day has changed from a simple “no driving day” to a new tradition of the Shekou community, Shenzhen. People sing, dance, open creative markets and have a picnic on car-free roads to celebrate it. The organizers of the event hope to create a greener and better community.
1. Which of the following activities is NOT encouraged on Car Free Day for travelling?A.Driving a car. | B.Taking a subway. | C.Riding a bike. | D.Taking a Walk. |
A.People who like sports. | B.People who love traveling around the world. |
C.People who can drive. | D.People who want to protect the environment. |
A.not sold | B.not allowed | C.not made | D.not changed |
A.Chengdu. | B.Xuzhou. | C.Beijing. | D.Shenzhen. |
A.To call on people to live a green life. |
B.To collect money for the community. |
C.To create more space for picnic lovers. |
D.To encourage people to give up driving. |
The Swimming Pool Opening Notice
No. 1 Middle School’s swimming pool will be open to the public from May 1st. Here are the opening time and price:
Opening time | Price |
Daytime: 14:30~15:30 & 16:00~17:00 (Open from May 1st) | Five yuan for No. 1 Middle School’s staff (员工) and students. Six yuan for children from 6 to 12 (must come with an adult). Eight yuan for students from other middle schools. |
Night: 18:00~19:00 & 19:30~20:30 (Open from May 5th) | Twelve yuan for all people. |
A swimming class will begin on May 15th. If you want to join the swimming class, please call Miss Wang at 8547611.
Welcome to the swimming pool!
1. The underlined word “notice” means “ ” in Chinese.
A.舞台 | B.通知 | C.原因 | D.程序 |
A.18:20 | B.17:40 | C.16:10 | D.13:30 |
A.No. 1 Middle School’s staff |
B.No. 1 Middle School’s students |
C.Children from 6 to 12 |
D.Students from other middle schools |
A.12 yuan. | B.8 yuan. |
C.6 yuan. | D.5 yuan. |
A.If you want to learn to swim, you can call Miss Wang. |
B.Children under 12 can’t go to the swimming pool. |
C.The swimming pool will be open from 14:30 to 17:00 during the daytime. |
D.You can go swimming in the swimming pool at night on May 3rd. |
【推荐2】Hello! I’m Lin Tao. I’m twelve. I’m Chinese. My English name is Jim. My telephone number is 657—4567. I live(居住) in Beijing. I have a good friend. His mane is Jack Green. He’s ten. He’s a student. His telephone is 378—8767. He lives in London.
1. Lin Tao is ten.2. Lin Tao is Chinese.
3. Jack is Lin Tao’s brother
4. Jack is twelve.
5. Jack’s telephone is 378—8767.
The boy’s father became seriously ill on the way home from a father-son shopping. He couldn’t speak and could hardly move, but he tried hard to stop the car safely. At that point, Dancy used his father’s phone to call his mother for help. The 5-year-old boy tried his best to give her useful information and he was able to tell where they were. Just as he had learned in the kindergarten, Dancy read the letters he saw on a nearby store sign: “F,U,R,N,I,T,U,R,E.” But that wasn’t enough for his mother to find them. Then he added that they were near a bridge. Finally, his mother understood he was talking about a store called Furniture 22 on New Jersey’s Route 22. The mother called 911 and the father was saved in time.
“He just thought his dad needed help,” Dancy’s mother told the reporter. She also pointed out that her husband was a hero, too. “It is surprising for him to get off the highway and get himself and his child to safety even when he was so sick,” she said.
Shine, head of the kindergarten, felt proud of his pupil. “Dancy’s spelling skills helped him seize(抓住)the moment,” he said. “And that’s the real value of education.”
1. When the father became seriously ill, he and his son were ______.
A.on the wayhome | B.in the kindergarten |
C.in a shopping center | D.at a bus station |
A.911 | B.his mother | C.Shine | D.the reporter |
A.Dancy drove his father home. |
B.The reporter was really a hero. |
C.Shine sent Dancy’s father to hospital. |
D.Dancy saved his father with his spelling skills. |
Every year, wildfires destroy millions of forest land. Homes are damaged, and thousands of people die. Smokejumpers help to stop this.
Smokejumpers are a special type of firefighter. They jump from planes or are lowered by helicopters(直升机)into areas that are difficult to reach by car or on foot, such as the middle of a mountain forest. They race to put out fires as fast as they can. At a fire site, smokejumpers first examine the land and decide how to fight the fire. Their main goal is to stop a fire from spreading or to slow its progress until full, ground-based firefighters arrive. Using basic equipment such as shovels(铲子)and axes(斧头), smokejumpers clear land of burnable(可燃的)material, like dry grass and dead trees. They carry water with them, too, but only a limited amount.
Although the majority(大多数)of smokejumpers are men, more women are joining now. The most important factors are your height and weight. Smokejumpers employed in the United States, for example, must be between 120 and 200 pounds(between 54 and 91 kilograms)so they don't get blown away by the strong winds or get hurt when they land. Smokejumpers must also be able to survive in the wild. In Russia, many smokejumpers know how to find food in the forest and can even make simple furniture from trees.
The work is dangerous, and the hours are long. But for these firefighters, smokejumping isn't just a job. They love being able to jump out of planes, fight fires, and live in the forest. As 28-year-old Russian smokejumper Alexi Tishin says. “This is the best job for tough guys.”
1. The reading is mainly about ________.A.the life of a Russian smokejumper | B.who smokejumpers are and what they do |
C.why people become smokejumpers | D.who can become smokejumpers |
A.at a proper height | B.male |
C.a university graduate | D.at a proper weight |
A.For the money. | B.For the excitement. |
C.To help their country. | D.To save the trees and animals. |
It seems that Britain is becoming a nation where everyone is saying sorry.Almost each person says sorry about eight times each day—and one in eight people apologize as many as 20 times a day.
As you may have seen,the British apologize more often than members of other cultures.A research shows that in many cases,people's love of saying sorry in Britain goes a little further than it does for Americans.For example,about 15 British people would say “sorry” while only 10 from the US would do this if they sneezed,if they corrected someone's mistake or if someone knocked into them.
In the old days,“sorry” was used to express regret and sadness for having done something wrong.But now British people use the word as a way of showing good manners.For example,they might say “sorry” instead of “excuse me”,“pardon”,“what” or “whatever”.
People in Britain also use “sorry” when they share the same feeling with others—so they might say “sorry about the rain”.
However,British people's use of “sorry” may make things very confusing(不清楚的) and difficult for foreigners who are not familiar with their ways.But actually,people in Britain pay much attention to the feelings of others.This is the reason why they apologize every day.
1. What does the passage mainly talk about?
A.What daily expressions British people often use. |
B.How people in Britain keep in touch with foreigners. |
C.The different meanings of “sorry” in and out of Britain. |
D.Why British people say sorry many times every day. |
A.did something wrong |
B.asked the way |
C.wanted to repeat something |
D.made a choice |
A.Americans say sorry more than British people. |
B.Even British people get confused when they say sorry. |
C.Almost every person in Britain says sorry 20 times a day. |
D.The British also say sorry to share the same feeling with others. |
A.like to talk about the weather |
B.care a lot about others |
C.are difficult to get along with |
D.love to correct mistakes |
【推荐3】Do you know World Sleep Day? World Sleep Day is an important event. It is a celebration of sleep and a call to action on important things related to(与……相关的)sleep, such as medicine, education and driving.
People celebrate it on the Friday before the spring equinox(春分)of each year. Events and activities of World Sleep Day are free and open to the public. “World Sleep Day is an important and successful event. Everyone needs to understand how important sleep is. Good sleep is so necessary, if you want to have a healthy life,” Dr William C. Dement, a spokesperson of World Association of Sleep Medicine said.
We all need to sleep, and the sleep hours are different from person to person. Without enough sleep, the body can die. For many of us, sleep is one of the biggest pleasures in life. In fact, many people see sleep as a hobby! Enough sleep can make us full of energy, so it is very important.
However, it is difficult for many people to get to sleep at night. That is to say, they have insomnia(失眠). There are over 80 kinds of sleep-related problems. Some people are lucky and have no sleeping problems. They sleep as soon as their heads hit the pillows. Do you sleep well?
1. How often do people celebrate World Sleep Day?A.Once a month. | B.Twice a month. |
C.Once a year. | D.Twice a year. |
A.When we should go to sleep. |
B.Why sleep is so important. |
C.How many people like sleep. |
D.How many hours’ sleep is the best for people. |
A.Health. | B.Travel. | C.Future. | D.Sports. |