Scientists in Japan have developed electric chopsticks that are designed to help people cut down on salt. Though human bodies need salt, many people eat far too much of it, which is unhealthy. It’s well known that eating too much salt can lead to high blood pressure, heart disease and so on. The special chopsticks use a tiny bit of electricity to make food seem saltier than it is.
Kirin, a Japanese company that sells food and drink, worked with researchers at Miyashita Laboratory to develop the chopsticks. The chopsticks have a battery pack that can be worn on the wrist (手腕). When the tips of the chopsticks are put in the mouth, a very light electric current (电流)—too small to be felt as a shock—changes the way the tongue (舌头) tastes certain chemicals.
Experiments showed that with the chopsticks, food could have up to 30% less salt and still taste just as salty. So far Kirin hasn’t announced plans to sell the chopsticks. But it is looking into ways the technology could be used with other eating utensils (餐具), including spoons.
1. What’s the harm of eating too much salt?| A．It can make the food less delicious. |
| B．It can make people not want to eat. |
| C．It can cause nose bleeding. |
| D．It can lead to high blood pressure. |
| A．To help people cut down on salt. |
| B．To help people with heart disease eat healthily. |
| C．To help people realize the dangers of eating more salt. |
| D．To help people with high blood pressure. |
| A．The chopsticks are good for people’s health. |
| B．The chopsticks can’t be used without electricity. |
| C．Kirin doesn’t have any plan to sell the chopsticks. |
| D．The chopsticks can help people eat 30 percent less food. |
| A．No technology, no life. |
| B．Technology can change lives. |
| C．Chopsticks play an important role in our life. |
| D．The less salt you eat, the healthier you will be. |
| A．Eat less salt to become healthier |
| B．Cut down on salt with electric chopsticks |
| C．Use electric chopsticks to get healthier |
| D．Let’s buy electric chopsticks |
相似题推荐
【推荐1】You may not have heard the words “fresh-man fifteen” before, but they are very important for students who are entering university. A freshman is a first-year college student. “Fifteen” refers to fifteen pounds, the fifteen pounds added to a student’s weight in his or her first year. There are a number of reasons why first-year university students gain (增加) the weight, but it’s encouraging to know that fresh-men don’t have to add these harmful fifteen pounds.
Mistakes choosing food
University kitchens serve many kinds of food. Some students choose unhealthy food, because now their parents are not nearby to help them choose. Some students visit the kitchen many times while studying. Late at night, some students get harmful fast food such as fish and chips with Coke to drink. Students also have less time for walking, running, and doing sports because of their schoolwork.
Eating right
If you’re careful, you don’t have to add fifteen pounds. Here are some ideas:
● Think more about what you eat.
● Eat plenty of vegetables and healthy meats.
● Don’t eat desserts full of sugar, have fruit after dinner.
● Try not to eat so much unhealthy food while you study.
● It’s all right to have a little fast food sometimes, but not often.
● Write down the foods you eat.
● Walk, run, do sports and you will feel better!
Remember that the “freshman fifteen” can happen to anyone. Talk to your friends about it. Together, try to eat healthy food and not to eat unhealthy food. Walking, running, and playing sports is always more fun with friends. Help each other and you can have a healthy and happy freshman year.
1. The “freshman fifteen” is ________.| A．weight that high school students gain |
| B．weight that first-year university students can gain |
| C．fifteen pounds of food that first-year students eat |
| D．fifteen students who eat unhealthy food |
| A．get students ready to gain fifteen pounds |
| B．sell healthy food to new students |
| C．help new university students not to gain fifteen pounds |
| D．show the mistakes students make in studying |
| A．Choosing unhealthy food. |
| B．Visiting the kitchen while studying. |
| C．Getting fast food at night. |
| D．Eating too much chocolate. |
| A．4 | B．5 | C．6 | D．7 |
| A．You’d better not eat unhealthy food. |
| B．Not eating unhealthy food is easier with friends’ help. |
| C．Gaining fifteen pounds can help you study better. |
| D．Some students can eat anything they want. |
【推荐2】How do you usually spend your day?
Get enough sleep.
Set yourself a “bed time” and make it a habit to go to bed and wake up at the same time each day.
Aim(力求达到) for 2 L a day. Give up the juices and carbonated beverages(碳酸饮料), just add lemon(柠檬) to your water if you feel like something fantastic.
Take a break.
Don’t be afraid to read books that have nothing to do with your studies. Go to the cinema. Work out. Even just once a week, or whenever you can. Go for a walk or a run, maybe just for 15 minutes.
Make time for your likes.
Studying is your full time job, but there are enough hours left in the day.
You’ll be thankful at the end of a long day when you can get into a comfortable bed that doesn’t look like you just jumped out of it.
根据材料内容，从下面五个选项中选出能填入文中空缺处的最佳选项，使短文意思通顺、内容完整。
| A．You’d better talk to your friends and family about something other than school. |
| B．Make your bed every morning. |
| C．Here are some advice from the Internet for you. |
| D．Take your mind away from your study. |
| E．Drink lots of water. |
【推荐3】Healthy eating is not about strict nutrition（营养）and staying very thin. It’s about feeling great, having lots of energy and keeping yourself as healthy as possible. Healthy eating begins with learning how to eat smartly. It’s not just what you eat, but how you eat. Learning the habits of healthy eating can help you gain more energy. You can add your food choices and learn how to plan a healthy diet.
Here are some useful steps that can help you make a change from now on.
Step 1: Start slowly and make changes to your eating habits.
Step 2: Try not to think of certain kind of food as “off-limits（禁止探讨的）”.
Step 3: Take time to eat your food and enjoy meal-time（进餐时间）.
Step 4: Eat breakfast and eat smaller meals during the day.
Step 5: Eat more healthy vegetables and whole grains.
Step 6: Eat less sugar and salt.
Plan your healthy diet in a number of small steps, rather than in one big change. If you approach the change step by step, you will have a healthy diet sooner than you think.
1. The underlined word “gain” in the first paragraph can be best replaced by “________”| A．get | B．take | C．buy | D．find |
| A．It is about staying thin. | B．It is about having lots of energy. |
| C．It is about strict nutrition. | D．It is about delicious food. |
| A．Try to know the food you can’t eat. | B．Change your eating habits little by little. |
| C．Try to eat food of whole grains. | D．Spend longer time enjoying your meal. |
| A．帮助 | B．接受 | C．接近 | D．前进 |
| A．Eating Healthy Food Every Day | B．Enjoying Your Mealtime to Keep Healthy |
| C．How to Change Your Eating Habits | D．Steps on Healthy Eating |
It was a February afternoon in a Brooklyn classroom. Sixteen-year-old Taylor Engler came face to face with a cow. But it was all in her head. She was transported by a virtual (TE拟的）reality (VIO headset-it took Taylor and her classmates to a farm 250 miles away. For students，the technology means field trips are no longer limited by the length of a bus ride.“I was not expecting it to be right in my face！”That's what Taylor said after taking off the headset and finding herself back in the classroom.
On any school day, students can take virtual reality “trips". They are deep-sea diving. They are observing medical operations. They are visiting the Science Museum in London. Teachers say it's another way to involve the iPhone generation（一代人）into classroom learning and it can help with their understanding and improve their grades. Calm Jones, a science teacher, has walked students through the northern forest with a Google app called Expeditions. “It can be done in a period or two with the help of the new technology, he said. "But it could take even a week sometimes to take a real expedition.’, "It's different from watching videos. You can actually move"，Taylor said during the lesson on farm animals. "Not only move, but also feel, said Richard Lamb. He studies how brains deal with information.“Your physiological responses（生理反应）in virtual reality are similar to what you get in doing the actual activity.”Lamb said.“Heart rate, breathing...everything.”
It is unknown how many classrooms will use the technology. But experts say it's still rare. Each headset can cost as little as＄20 or＄30，but systems and software for classes run into thousands of dollars. And good software is in great need. Another problem we face is how to make sure the VR technology mimics（模仿）the real world closely. "But we have to say VR technology provides students with a huge learning opportunity,”said David Evans, director of the National Science Teachers Association.
John Miller, a chemistry teacher，agreed. "Too often in schools, students did something wrong in their chemistry experiments. But we don't have enough materials for them to redo the experiments. In virtual reality, all they do is hitreset on the computer. We don't have to actually use chemicals.”Both Miller and Evans stressed the technology could enrich-not replace-real-world experiences. "We have to remain anchored（立足）in the real world,”Evans warned, "because that's the one that we really need to study and explain.”
1. On a February afternoon, Taylor_____.| A．travelled to a farm on a bus | B．watched a video about a cow |
| C．had a virtual reality lesson in the classroom | D．played computer games with her classmates |
| A．VA technology is widely used in schools. |
| B．Teachers think VR technology helpful for students. |
| C．Colin Jones' students prefer a real trip to the forest. |
| D．Students breathe faster in VR activities than in actual ones. |
| A．people shouldn't lose interest in the real world |
| B．people should develop more VR systems and software |
| C．VR technology won't change students' way of learning |
| D．VR technology will reduce students' mistakes in experiments |
【推荐2】Super computers are very large classical computers with thousands of CPUs (中央处理器). They are so powerful that they can help scientists study big problems much easier, such as the origin (起源) of the universe.
But for some problems, even supercomputers seem too slow. So scientists are trying to make a new type of tool: quanturn (量子) computers.
In 2020, Chinese scientists created the world’s first light-based quanturn computer, called Jiuzhang. Compared with today’s best super computers, Jiuzhang can calculate (计算) 100,000 billion times faster. Now, there are an even faster one: Jiuzhang 2.0. It made a big breakthrough with a difficult math problem. It calculated an answer in just millisecond (毫秒), according to Xinhua. The fastest classical super computer would take 30 trillion (万亿) years to do that!
Why is there such a big difference? The secret is that quanturn computers work in a totally different way from classical ones. In classical computers, like our laptops, the information is stored as 0s and 1s. These are called “bits”. But quanturn computers use “quits” it (量子比特). They can be 0.1 or 0 and 1 at the same time — or anything in between!
This way, quanturn computers can receive information much faster. A classical computer’s calculation is like looking for a lost dog by searching one street after another, but quanturn computers can do it by searching lots of streets at the same time!
What can we do with it? Since the technology is still in its early stages, it’s hard to predict. “But it can improve our computing capabilities (能力) and help research in many fields, such as drug design and code breaking (密码破译),” team member Lu Chaoyang told the People’s Daily.
1. Compared to classical super computers, the quanturn computer, Jiuzhang ________.| A．is easier to make | B．calculate faster | C．never fails | D．is much smaller |
| A．休息 | B．毛病 | C．突破 | D．改变 |
| A．Because they work in different fields. | B．Because they work in different ways. |
| C．Because they are made of different materials. | D．Because they are made in different countries. |
| A．Jiuzhang 2.0 won’t be replaced. | B．Jiuzhang 2.0 hasn’t been put to use yet. |
| C．Jiuzhang 2.0 might not be useful in real life. | D．Jiuzhang 2.0 will help in many fields. |
| A．a newspaper | B．a guidebook | C．a letter | D．a notice |
Two teams of scientists in Denmark and in the United Kingdom came up with the same question at about the same time: Could they identify（识别）the animals in an area from DNA that was simply floating in the air?
| DNA and eDNA Every living thing has DNA that can be used to identify it. They leave bits of DNA behind them wherever they go. DNA left behind like this is called “environmental” DNA, or eDNA. Scientists can use it to tell what kinds of animals are in a certain place. |
Testing for eDNA isn’t a new idea, but most of the time, scientists look for eDNA in water. Neither team knew that the other group was working on a similar experiment. One collected samples from different locations at Denmark’s Copenhagen Zoo, and the other did at Hamerton Zoo Park in the UK. The scientists used slightly different methods to collect their samples. But basically, both teams used vacuums（真空吸尘器）and fans to collect tiny bits of DNA.
In the laboratory, comparing their samples with examples of DNA from different animals, the scientists were able to identify many different animals at the zoos.
The scientists chose to test in zoos because they had rare animals not naturally found in the area. Each team only discovered about the other experiment after they had written a paper about their own results. The two decided to combine（合并）their results and publish a paper together.
Both teams are excited about the ways this new method could be used in the wild. The researchers believe the method could help scientists a lot. Scientists have been looking for better ways to track endangered animals without interfering（干扰）with them. If researchers know where animals live, they can do a better job of protecting them. The next step is to figure out how to take this method into nature.
1. What can we learn about “eDNA” from the passage?| A．It’s only floating in the air. |
| B．It’s created by some researchers. |
| C．It isn’t found in the water. |
| D．It’s left in the environment. |
a.Collect very tiny bits of DNA from the air.
b.Tell what kinds of plants and animals are in the zoos.
c.Enter Denmark’s Copenhagen Zoo with vacuums and fans.
d.Compare the samples with others in the laboratory.
| A．a-b-d-c | B．d-b-c-a | C．c-a-d-b | D．b-a-c-d |
| A．They used quite different methods. |
| B．They knew exactly what they were doing at first. |
| C．They competed against each other. |
| D．They worked together to publish a paper. |
| A．To advise scientists to use new ways to do the experiment. |
| B．To tell us the work of both teams is meaningful. |
| C．To mention that the method of both teams isn’t perfect. |
| D．To call people to protect endangered animals. |
【推荐1】Wikipedia (维基百科) is an online free encyclopedia. There are more than 38 million articles about society, history, culture, music, science, technology, geography and so on. On this website, people can find articles about almost everything in the world. Wikipedia has also developed 292 languages versions (版本) for people to read in their own languages.
Jimmy Wales and Larry Sanger started this encyclopedia project on 9th March, 2000. It was called Nupedia at first, and all the articles were written and checked by experts. Wales thought that the website should be a place where its users could not only find information but also share what they knew. So they tried to use a wiki system (wiki is a Hawaiian word “wee kee wee kee” which firstly meant “quick”). On 10th January, 2001, they began a new project to improve Nupedia. On 15th January, 2001, the new online encyclopedia named Wikipedia was set up. Wikipedia achieved a great success.
According to the Alexa Traffic Rank report on 22nd May, 2016, Wikipedia is the seventh most popular website in the world. Every single user helps to make this free encyclopedia popular.
1. Wikipedia is ________.| A．a library | B．a website | C．a report | D．a book |
| A．On 9th March, 2000. | B．On 10th January, 2001. |
| C．On 15th January, 2001. | D．On 22nd May, 2016. |
| A．To search for information. | B．To read novels. |
| C．To listen to music. | D．To read Alexa Traffic Rank. |
| A．Wikipedia is the most popular in the world. |
| B．Users share what they know on Wikipedia. |
| C．Wiki is from a Hawaiian word. |
| D．Wikipedia is free to use. |
| A．A science story. | B．A travel guide. | C．A diary. | D．A magazine. |
【推荐2】Stephen Hawking is one of the most famous scientists in this century. He was born in 1942. He’s world famous on space and time. Stephen was searching some very big questions, such as “How did the universe begin? How will it end?”
Stephen was a student at Oxford University. He studied math and science. Then, at the age of twenty, he became sick. He was so young, but the doctors said to his family, ‘He has only two more years to live.’ In fact, the doctors were wrong—he didn’t die. He couldn’t walk but he used a wheelchair (轮椅). He couldn’t feed himself and get in or out of bed himself. But he didn’t yield to the condition. He talked with the help of a computer. After Oxford, Stephen went to Cambridge University. Three years later, in 1965, he became a doctor of philosophy (哲学).
Because of his serious health problems, it was difficult for him to draw or to write. So he started to think in pictures. With this new way of thinking, he became one of the most famous scientists in the world. In 1988, he wrote his first important book, A Brief History of Time. It sold more than 5.5 million copies in 33 different languages. He was once invited to China, he was very confident and humorous.
1. Which of the following is NOT true?| A．Stephen was good at thinking. |
| B．Stephen couldn’t walk after he became very sick. |
| C．Stephen has had the answers to some very big questions. |
| D．Stephen once studied at Oxford University. |
| A．science | B．math | C．philosophy | D．art |
| A．面对 | B．屈服 | C．商讨 | D．抵抗 |
| A．a book which is famous all over the world | B．a book about Chinese history |
| C．a book about spaceship | D．a book about Stephen’s talk in China |
| A．Stephen’s books | B．Stephen’s study | C．Stephen and his country | D．Stephen’s life |
【推荐3】Should parents ask their children to do chores? Some believe that children shouldn’t do chores. They think that children don’t need to cook or clean for themselves or their parents. But many people think that children can get a lot from doing some chores.
It helps children learn to do some housework that they have to do when they live on their own, and it also gives children a sense of responsibility and confidence.
Most experts agree, however, that chores should fit children. Parents shouldn’t ask a schoolboy to cook when he is doing his homework. If he has many activities after school on schooldays, there is no time left to do chores. Perhaps he can do chores on weekends.
When a child does what his parents ask him to do happily, he will probably have the feeling of growing up. Chores can be useful. They are a teaching tool. Parents use the tool to teach children so that they can care for themselves some day. And please make sure that parents also do chores.
If parents don’t keep a clean house, children won’t find any reason to do chores.
1. Doing some chores is good for children, because ________.| A．they can get good grades |
| B．they like doing the chores |
| C．they can get a lot of knowledge |
| A．理由 | B．责任 | C．任务 |
| A．Because children should do their homework first. |
| B．Because children like to play sports on weekdays. |
| C．Because the time left to do chores may be short on schooldays. |
| A．some money |
| B．the feeling of growing up |
| C．the way of caring for themselves |
| A．Some people believe that children should earn money. |
| B．Parents shouldn’t ask a schoolboy to cook when he is doing his homework. |
| C．Parents don’t do chores every day because their children can do chores. |
