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People become nearsighted because their eyeballs grow out of shape and light entering their eyes cannot focus correctly. The body can produce a chemical called dopamine (多巴胺) to stop eyeballs from changing shape. And guess what scientists have just discovered? Sunlight can help our bodies produce more dopamine, reported AFP.
According to the study, primary school students in Singapore spend only 30 minutes outdoors every day; in Australia, by contrast, kids spend about three hours a day outside. As a result, fewer children in Australia are nearsighted–only 10 percent, compared with 90 percent in Singapore.
“Children in East Asia basically go to school... go home and stay inside. They study and they watch television,” Ian Morgan of the Australian National University told AFP.
But being a bookworm or a couch potato does not directly harm the eyes, added Morgan. “As long as they get outside, it doesn’t seem to matter how much study they do,” he explained. “There are some kids who study hard and get outside and play hard and they are generally fine. The ones who are at major risk are the ones who study hard and don’t get outside. As a result of massive (巨大的) educational pressures and the construction (构成) of a child’s day, the amount of time they spend outside in bright light is minimized.”
Experts suggest children should stay outside for two to three hours every day. This can include time spent in the playground and walking to and from school.
小题1:Which of the word has the similar meaning as the underlined phrase “nine in ten”?
A.many | B.few | C.some | D.most |
A.Too much reading or gaming. | B.Lack(缺少)of sunlight. |
C.Genetic reasons. | D.Lack of exercise. |
A.Dopamine is a chemical that causes eyeballs to grow out of shape. |
B.Dopamine can stop light entering the eyes from focusing correctly. |
C.Spending time in the sun can make the loss of dopamine in the body. |
D.The more dopamine a person has in their body, the better eyesight he or she has. |
A.Those who like watching TV. |
B.Those who take exercise regularly. |
C.Those who study hard and play hard outdoors. |
D.Those who stay indoors studying all day |
阅读下面材料,从每题所给的三个选项(A、B和C)中,选出最佳选项。
What should you take in with you when you take an exam? Pen, pencil, eraser, ruler … and don’t forget a bottle of water!
According to a study held in London, students who bring water into exams may improve their grades by up to 10%.
Scientists in UK did the study on 448 students. The students were studying for different degrees at the University of East London. Only 25% of them entered the exam hall with water.
Scientists then compared their exam results with their normal schoolwork grades. They found that all those who had brought water with them got better grades by 2% to10%.
Scientists also predicted the students’ scores according to their normal schoolwork. They wrote down their possible scores on paper before exams.
It is unclear why drinking water improves exam results. But scientists say having enough water in our bodies and not feeling thirsty could have a helpful effect on our brains. Drinking water may also reduce anxiety (焦虑), which has a bad effect on exam performances.
“Whatever the explanation is, it is clear that students should try hard to stay hydrated (含水的) with water during exams,” one of the scientists said.
So next time, when you are going to have a big exam, try bringing a bottle of water with you. It may help you pass the exam!
1.According to the study, students who bring water to exams may ______.
A. get better scores
B. feel worried in exams
C. be smarter than others
2.How many students brought water during the exam in the study by the UK scientists?
A. 25. B. 112. C. 448.
3.Having enough water in exams ______.
A. makes the students smarter
B. helps the students stay calm
C. improves the students’ scores by 20%
4.The underlined word “predicted” means “______”.
A. 预测 B. 提高 C. 更正
5.What’s the best title for the passage?
A. The more water, the higher scores
B. Anxiety in the exams
C. Water helps in exams
查看习题详情和答案>>
阅读下面材料,从每题所给的三个选项(A、B和C)中,选出最佳选项。
What should you take in with you when you take an exam? Pen, pencil, eraser, ruler … and don’t forget a bottle of water!
According to a study held in London, students who bring water into exams may improve their grades by up to 10%.
Scientists in UK did the study on 448 students. The students were studying for different degrees at the University of East London. Only 25% of them entered the exam hall with water.
Scientists then compared their exam results with their normal schoolwork grades. They found that all those who had brought water with them got better grades by 2% to10%.
Scientists also predicted the students’ scores according to their normal schoolwork. They wrote down their possible scores on paper before exams.
It is unclear why drinking water improves exam results. But scientists say having enough water in our bodies and not feeling thirsty could have a helpful effect on our brains. Drinking water may also reduce anxiety (焦虑), which has a bad effect on exam performances.
“Whatever the explanation is, it is clear that students should try hard to stay hydrated (含水的) with water during exams,” one of the scientists said.
So next time, when you are going to have a big exam, try bringing a bottle of water with you. It may help you pass the exam!
【小题1】According to the study, students who bring water to exams may ______.
A. get better scores
B. feel worried in exams
C. be smarter than others
【小题2】How many students brought water during the exam in the study by the UK scientists?
A. 25. B. 112. C. 448.
【小题3】Having enough water in exams ______.
A. makes the students smarter
B. helps the students stay calm
C. improves the students’ scores by 20%
【小题4】The underlined word “predicted” means “______”.
A. 预测 B. 提高 C. 更正
【小题5】What’s the best title for the passage?
A. The more water, the higher scores
B. Anxiety in the exams
C. Water helps in exams
Do you get enough sleep? With so much homework it's often difficult to get the rest you need. But you need to try, because sleep keeps you healthy and it stops you getting fat.
Recently, a group of US scientists did a study (调查) of kids aged between 8 and 13. The study found that if kids sleep for just one extra (额外的) hour each day, the chance of their getting fat is cut by about 30 percent .
Why? When people don't get enough sleep, they become tired. When they are tired, they don't exercise enough. Also, kids like snacks: If they are awake (醒着的) an extra hour or two each day,they have more time to eat snacks or other unhealthy foods.
So, how much sleep should you get? Scientists suggest 10 to 11 hours a night for kids aged 5 to 12. For older kids, eight to nine hours will do.
1.How many reasons are given why people might get fat without enough sleep?
A. 3. B. 2. C. 1 D. None.
2.If you are under 10, how long do the scientists advice you to sleep?
A. 10 to 11 hours. B. 8 to 9 hours. C. 8 to 13 hours. D. As long as possible.
3.Where was the study done by the scientists?
A. In China. B In Britain. C. In America. D. In Japan.
4.What does" eight to nine hours will do" mean?
A. Eight to nine hours' sleep will be good and enough.
B Eight to nine hours' sleep will be too long.
C. Eight to nine hours' sleep will help get fat.
D. Eight to nine hours' sleep will help eat snacks and unhealthy foods.
5.What does the passage talk about?
A. How to get long sleep.
B How to keep fat.
C. Enough sleep makes people healthy and slim (苗条)
D. Long sleep makes people healthy and slim.
查看习题详情和答案>>
It is said that people born on different dates have different characteristics. For example, people who were born between March 21 and April 20 are likely to be active and strong. They like power and enjoy adventures.
People who were born between April 21 and May 21 are likely to learn more slowly, but they can remember what they learn well. They love children and usually have many friends.
People who were born between May 22 and June 21 are bright and humorous. They like to talk and enjoy wearing fine clothes.
People who were born between June 22 and July 22 think deeply. They would rather hide their feelings than express them.
People who were born between July 23 and August 22 are interested in many subjects and it is interesting to hear them talk.
People who were born between August 23 and September 22 are said to be calm and thoughtful. They like to read and often become successful scientists.
If you have free time, you can read about star signs to see if your characteristics match your birth date.
【小题1】People who were born between March 21 and April 20 are ________.
A.patient | B.modest | C.energetic | D.kind |
A.wear fine clothes | B.take care of others |
C.travel around the world | D.buy their friends nice gifts |
A.singing and dancing | B.earning money |
C.doing with difficulties | D.expressing their feelings |
A.between April 21 and May 21 | B.between July 23 and August 22 |
C.between August 23 and September 22 | D.between June 23 and July 22 |
A.birth dates | B.abilities | C.star signs | D.birth dates and characteristics |