China has completed its BeiDou Navigation Satellite System (卫星导航系统), or BDS, becoming another one in the world with a global (全球的) navigation network, the other three being GPS of the US, GLONASS of Russia and Galileo of the European Union.
As the name suggests, the global navigation satellite system provides navigation and location services 24 hours a day. From what we have known so far, building a good satellite system costs a lot. Why does China have a new one if there is nothing special?
The other three systems have 24 satellites in MEO. Besides the 24 satellites, China’s new global navigation satellite system BeiDon-3 also has three satellites in GEO and three in IGSO. What’s special about these six satellites is that they have a relatively fixed area of activity. This can improve BDS’ accuracy (精准度) in China and the Asia-Pacific region to 5 meters, compared with a 10-meter accuracy in other areas.
BDS has another advantage - the short message service. It allows users to have a two-way communication. In areas not covered by communication signals (信号), BDS can make the short message service available in uninhabited areas, such as deserts, forests, mountainous and polar areas. With this service, users who are in danger can tell the rescue team (救援队) their location and condition.
In fact, BDS is also good business. According to the official report, China’s satellite industry has kept a 20% annual growth since 2012. And BDS contributes (贡献) about 80% of it. BDS has also created countless high-paying jobs. And with continuous improvement, it will have much more to offer in the future.
1. BDS is the ________ global navigation network in the world.A.third | B.fourth | C.fifth | D.sixth |
A.24 | B.27 | C.30 | D.36 |
A.A place that is very high | B.A place with lots of animals |
C.A place impossible to get to | D.A place with no people living in it |
A.It can only be used in China. |
B.It is good for China’s development. |
C.It has made lots of people lose their jobs. |
D.It doesn’t work in areas where there is no communication signal. |
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【推荐1】A growing number of people are using ChatGPT, an AI program, to create books for sale.
Until recently, Brett Schickler never imagined he could be a writer. But after learning about ChatGPT, Schickler decided that he had a good chance. “The idea of writing a book finally seemed possible,” said Schickler, a postman in New York. “I thought I could do this.”
Using the AI program, Schickler created a 30-page picture book in a few hours. He offered it for sale in January through Amazon. “The book has made me less than $100,” he said. While that may not sound like much, it is enough to make him want to create other books using ChatGPT. Like Schickler, Kamil Bane told his wife that he could make a book in less than one day. “It was actually really simple,” he said. “I was surprised at how fast it went from an idea to publishing (出版).”
However, Mark Dawson, a famous writer, was quick to call ChatGPT-aided novels “dull”, which means not interesting. He said, “If a book gets bad reviews because the writing is dull, then it’s quickly going to the bottom.”
Mary Rasenberger is a member of a writer’s group. She said, “This is something we really need to think about. These books will pour into the market and a lot of writers are going to be out of work.”
1. What is Brett Schickler?A.A famous writer. | B.A postman in the US. |
C.A worker of Amazon. | D.An AI programmer. |
A.Brett Schickler has made much money with AI. |
B.Brett Schickler plans to create a book once a month. |
C.Brett Schickler may keep writing books by ChatGPT. |
D.Brett Schickler dreamed of being a writer since he was young. |
A.A lot of writers lost their jobs. |
B.ChatGPT could create books fast. |
C.Amazon sold the most books in the US. |
D.The books written by ChatGPT were interesting. |
A.Proud. | B.Worried. | C.Confident. | D.Bored. |
In the search for clean, renewable(可再生的)energy, wind power might be the perfect choice. People have been using the power of the wind for centuries. Since ancient times, wind power has been used to move ships, grind grain(碾谷)and so on. Around the end of the 19th century, the invention of the wind turbine(涡轮机)made it possible to use wind to produce electricity.
The first advantage of wind power is that it is a renewable resource(能源). No matter how much wind we use to produce electricity, it will never run out. Secondly, wind power is a clean resource of energy, meaning it produces electricity without harmful emissions(排放物). Thirdly, although wind turbines can be very tall, each uses only a small piece of land. This means that the land below can still be used.
Yet, wind energy has some disadvantages. One of the disadvantages is that the large spinning blades(螺旋桨叶)of the wind turbines can be dangerous to birds. The second is that the turbines also create noise pollution. The sound may make the people nearby uncomfortable. The third, wind can not provide a constant supply(供应)of energy. Even the windiest places on earth are sometimes peaceful. Without a strong wind, wind turbines are not able to produce electricity. That means wind power isn't suitable as the only resource of electricity.
Although wind energy has certain disadvantages, there is no reason why we should give up this renewable and clean resource of energy. Wind energy certainly is one of the bright hopes of our future.
1. When did people start to use wind to produce electricity?A.Several centuries ago. | B.At the beginning of the 19th century |
C.In the mid-19century. | D.At the end of the 19th century |
A.Two | B.Three | C.Five. | D.Six. |
A.The advantages of wind energy. | B.The disadvantages of wind energy. |
C.The history of wind energy | D.The development of wind energy. |
A.连续的 | B.短暂的 | C.无害的 | D.一次性的 |
Robbie looks out of the window. It’s still snowing heavily and there is ice on the window. It is another day. Robbie is told to do the cleaning. And he does it. The family are getting home. So after he turns the heat on, he begins to cook supper for the family. All of the housework is easy for Robbie, but a hard one for its master, Helen. Robbie really saves the family a lot of work.
ASIMO is a clever robot created by the Honda Motor Company. He is about 120 centimeters tall and looks like a kid in a spacesuit. Tiny computers are used to control the things ASIMO can do. He can shake hands with people, give and receive objects. He can walk and run forward or backward on two legs. Besides, he can also talk and understand many voice commands(指令). When something is in his way, he can change directions.
Mr. Green is a fourth grade robot teacher. He never forgets details and he makes no mistakes. He even knows each child’s pets and hobbies. He has his lessons in an orderly way, and he never feels tired. The children like Mr. Green very much. They feel happy and relaxed in his class. When they make a mistake, they don’t feel upset. They have a lot of fun with a robot teacher.
Robots are smart because they have computer brains. Some of them have explored other planets. These machines also do many jobs in factories and other places. For example, robots are used to make cars. People also use robots to do dangerous work such as exploring volcanoes(火山)or the ocean floor. Robots are also used to give directions in shopping centers and amusement parks.
Scientists keep finding more ways for robots to help us.
1. Robbie is a cook.2. ASIMO can explore the moon.
3. The children have a good time with Mr. Green in his class.
4. According to the passage, robots can feel upset when making mistakes now.
5. From the passage we can know that many more uses will be found for robots.
【推荐1】Looking for a fun Earth Day activity? Try picking up litter while running slowly. It may sound strange, but the new “sport” is becoming very popular with runners all over the world. Many of them put the pictures of holding bags of rubbish on social media.
Eric Ahstrom came up with the idea. Early in 2016, Ahstrom became bored at the growing rubbish on the road during his daily bike ride to his planting farm. Since picking up rubbish while on his bike was hard to do, Ahistrom began joining the activity into his daily runs.
“I was surprised at so much junk in nature,” he said to the people around, “The same bottle could lie on the road for several weeks without anyone picking it up, so I started doing it. I felt happy to clean up a small piece.”
Other joggers soon joined Ahlstrom. By the end of 2016, the activity had become so popular that official “plogging” events took place all across Sweden. Many groups of runners also took part in it. As plogging became popular on social media, the new “sport” started to spread beyond Sweden first to other European counties and then worldwide now.
1. How do people show the activity “picking up litter while running”?A.By having a party in public. |
B.By making short videos on the Internet. |
C.By putting the pictures on the social media. |
A.A professional runner. | B.A farmer. | C.An environmental worker. |
A.runners | B.cleaners | C.volunteers |
A.In Ahlstrom’s hometown. | B.In Sweden. | C.All over the world. |
A.A Fun Earth Day | B.Eric Ahlstrom’s job | C.Picking Up Litter While Running |
【推荐2】Usually, many people complain they are facing problems. In fact, every day and everywhere there are problems. When one problem is solved, another one comes up.
People have money problems, work problems, family problems, health problems…the list goes on. And we always think that people who are happy and successful have fewer problems than us. It seems that everything goes well with them. But the fact is that the more successful you are, the more problems you will have to face. Successful people just know how to solve their problems.
We may say, new presidents (总统) are lucky, happy and successful. But they have to face bigger challenges and lots of pressure. To keep their countries moving forward, they have to be more careful about their work and decisions.
You may ask, “If there are too many problems in life, then how can we find happiness?” The answer is to find happiness while you are solving your problems.
On the other hand we need problems. They help us to grow. If you had a fight with your friend, what should you do? No matter who is wrong, I think you need to change the way you behave (表现). Try to communicate with your friend. You can take some actions, such as spending more time with your friend and showing more love. By doing so, you will solve the problem and become a better person.
1. What does the underlined word “complain” mean in Chinese?A.评论 | B.喜爱 | C.抱怨 | D.解决 |
A.only have small problems | B.have few problems |
C.like to meet challenges | D.solve problems well |
A.Money problems. | B.Work problems. | C.Family problems. | D.Health problems. |
A.win friendship | B.find happiness | C.become rich | D.get clever |
A.how to face problems correctly | B.problems can be solved easily |
C.how to be a better person | D.problems are everywhere |
【推荐3】Here are some good apps for you. Have a try at once!
The best way to learn a new language is to take an “immersive approach”(沉浸方式). Fluent is a learning app around this idea. FluentU takes real—world videos—like music videos, news and talks——and turns them into language learning lessons. It introduces you to authentic(真实) videos with the help of subtitles flashcards and tests. | |
If you’re not a native speaker, learning how to pronounce correctly may not come naturally to you. ELSA can be your best friend. ELSA uses the best voice recognition(识别) technology to give instant feedback(快速反馈)on your pronunciation. With over 1, 200 lessons and an interactive dictionary, you can spend just 10 minutes a day on this app and see the results quickly. | |
It’s normal to make grammatical mistakes. But there are ways to reduce the grammar mistakes you make while you write, and one of the best is Grammarly. You can get instant checks of your grammar and punctuation(标点)and even feedback about why you’re wrong. In short, you’ll get two benefits: You’ll learn English grammar from your own mistakes. You won’t have to worry about sending a grammatically incorrect email to your English teacher, ever again. |
A.subtitles | B.flashcards | C.tests |
D.dictionaries |
A.voice recognition | B.video production |
C.spell checking | D.photo recognition |
A.language | B.computer | C.memory | D.sports |