If you look at the top of your phone, you’ll usually see a small symbol that shows 3 G or 4 G. The “G” means the “generation” of your mobile network. But they will become history after the 5 G network fully arrives.
In recent years, China makes great achievements in 5 G. Now it’s making efforts to popularize the business use of 5 G. Shanghai is the first city in China to start testing the 5 G network. On March 30, 2019, Wu Qing, one of the leaders of Shanghai, made the first 5 G video call with Huawei Mate Smartphone.
5 G allows people to download and upload data faster than ever before. It is 100 times faster than the 4 G network. But 5 G doesn’t just bring faster mobile Internet. People can use it for many other things as well. For example, 5 G can make self-driving cars safer. Today’s self-driving cars have one problem —time lag. When a self-driving car “sees” an obstacle（障碍物）, it sends the information to data center and receives instructions. However, it takes time to do that. That’s the time lag. With this kind of lag, the car might have an accident because it doesn’t receive instructions in time. But with 5 G, the self-driving car can receive instructions in a shorter time.
5 G can also be used to power the Internet of Things（物联网）. This refers to a large online network that connects all things and people. Fast Internet speeds will be the key to developing this technology. For example, with the Internet of Things, your smart fridge could order eggs online when it notices that there are no eggs left inside.
The facts listed above are only part of what 5 G can do. Just as in the early days of the Internet in the 1990s, few could see how it could change the world. The same will surely happen to 5 G. With 5 G, many things do not seem like dreams to anyone. Now let’s get ready to say goodbye to 4 G and welcome the coming of 5 G.
1. Which of the following is TRUE about 5 G according to the passage?| A．The 5 G network can only make the mobile Internet faster. |
| B．The first city in China to test the 5 G network is Shanghai. |
| C．The 5 G network has been fully used in China. |
| D．The 5 G network is 10 times faster than the 4 G network. |
| A．explain how self-driving cars work |
| B．show how important self-driving cars are |
| C．explain how 5 G’s fast speed can be helpful |
| D．show how dangerous 5 G is for self-driving cars |
| A．时间滞后 | B．时间隧道 | C．时间规划 | D．时间顺序 |
| A．4 G is not used in our daily life now. |
| B．the writer is worried about the coming of 5 G |
| C．with 5 G, some of our dreams will come true for sure one day |
| D．in the 1990s, all the people believed that the Internet would change our life |
| A．The advantages of 5 G | B．The development of 5 G | C．The meanings of 5 G | D．The popularity of 5 G |
相似题推荐
【推荐1】Technology is developing fast and it has become an important part of our life. Then what will the world be like in the future?
3-D food will be both delicious and nutritious(有营养的). We can use 3-D printers to print some basic materials. Scientists believe we just need to turn on a printer in the kitchen and then we can enjoy our favorite food.
5G network will allow more people to get information. Big companies like China Mobile and China Unicom will start to offer 5G. 5G is expected to download(下载) about 10 times faster than 4G. For example, we can download a film within just 1 minute. But with a 4G network, it takes about 10 minutes.
Space tour will be a piece of cake. For us common people on the earth, the dream of travelling around space will come true. In the coming years, spacecraft will be as popular as buses, trains and planes. We can leave our home and enter space to take an adventure (冒险). And even we will get used to living there.
You won’t worry the quality(质量) while shopping online. Some researchers are working on computer screens that can feel a sense of touch when you touch them. “If you’re shopping online for clothes, you could feel fabric(面料).” said Cynthia, an engineer at Texas A＆B University, US.
A robot will be a part of life. Robots can do the same things as we humans do, like driving cars. But they will be used in other areas as well. They will have the ability to think. They can tell the difference between right and wrong.
In a word, just as Jules Verne said, “Anything one man can imagine, other men can make real.”
1. How many scientific achievements about future life are mentioned in the text?| A．3. | B．4. | C．5. |
| A．listing numbers | B．giving reasons | C．giving examples |
| A．Robots will be used more widely. | B．Space tour will be easy for only rich people. |
| C．All the clothes will sell well. | |
| A．fabric | B．clothes | C．computer screens |
| A．a science magazine | B．a story book | C．a travel guide |
【推荐2】“Welcome to our new ‘classroom’!” said Chen Dong, one of the three astronauts of the Shenzhou XIV mission.
They were giving a science class 400 kilometers above Earth on Oct 12. It was the third space class from the Tiangong space station, but the first one from the Wentian lab module (实验舱) since its launch in July. The former two classes were held in the Tianhe core module (核心舱).
What does the new “classroom” look like? Chen, together with Liu Yang and Cai Xuzhe, showed us around. “The beds in the Tianhe module are placed horizontally (横着), while our beds are kept upright,” said Liu. That means astronauts in the Wentian lab module need to sleep standing up! But as Liu explained, people don’t feel any difference because there’s no gravity (重力) in space. Astronauts can even sleep on the ceiling (天花板) or upside down!
The astronauts also showed their “space farm”, where lettuce, wheat (小麦), thale cress (拟南芥) and rice are grown. “Take a picture!” “Send the picture!” Through a voice-controlled camera, Chen already sent a picture of the thale cress to scientists on Earth. Then he used scissors to cut a sample (样本). “I’ll put it into a fridge at -80℃ and later give it to scientists on Earth,” said Chen. Scientists will study how the environment of space affects the growth of plants.
“Can you see the water drops coming from the leaves? This is called ‘guttation’ (植物吐水现象),” said Liu, holding the well-grown rice. In space, the water drops are much bigger than those on Earth. So people can clearly see the guttation.
“We hope in the near future, we can harvest (收获) the food grown on our own,” said Chen. “Maybe one day, we can harvest food on the other planets like moon or even Mars!”
1. Where was the third space class held?| A．On Mars. | B．In the Wentian lab module. |
| C．On Earth. | D．In the Tianhe core module. |
A． | B． | C． | D． |
| A．“Guttation” can be clearly seen from leaves of rice in space. |
| B．It’s easy to grow lettuce, wheat, and rice in Shenzhou XIV. |
| C．People may try to grow food on other planets in the future. |
| D．Astronaut Chen sent pictures of thale cress to children on Earth. |
| A．The Future of Space Science | B．The Life of Three Astronauts |
| C．A Journey into the Space | D．A Space Class in Shenzhou XIV |
【推荐3】Technology aims to bring a better life. Among the amazing inventions of the 24th China Hi-Tech Fair in Shenzhen, some pet-related products show high tech’s soft side.
Guliguli, a Nanshan-based tech company, has brought some pet products to the high-tech fair. Among them is a robot named Rocki, which is made to keep pets company (陪伴) while their owners are away from home.
The helmet-shaped white robot has four wheels, a camera, a microphone and an infrared (红外线) light set on top of it. Pet owners can control the robot on their phones. With an app, they can move it around, talk to their pets in real time and even feed the pet s with snacks or food placed inside the robot.
According to Wang Di from Guliguli, they started thinking about developing the robot after discovering a lack of smart products in the huge pet products market. After doing surveys, they found that many pet owners wanted to know what their pets were doing when they were away from home.
“Most cameras help pet owners watch their pets, but they can’t help people play with their little furry friends,” Wang said. “That’s why we came up with the robot. It helps people to play with their pets and provide their pets company remotely.”
1. What can you probably buy in a Hi-Tech Fair?
| A．Pets. | B．Books. | C．Food. | D．Robots. |
| A．The appearance. | B．The importance. |
| C．Its convenience. | D．Its introduction. |
| A．Controlling pets. | B．Cleaning pets. |
| C．Looking after pets. | D．Cooking for pets. |
| A．The need of pet owners. | B．The change of the pet market. |
| C．The lack of pet products. | D．The open of the High-Tech Fair. |
| A．CULTURE. | B．TRAVEL. | C．BUSINESS. | D．SPORT. |
【推荐1】Everyone has a hobby. There are many kinds of sports like football, basketball, baseball or swimming. For me, playing volleyball is my favorite hobby. When I was a little girl, I played volleyball in the school team. My mother said that I liked playing volleyball when I was only about two years old. Playing volleyball helps me to relax. When I finish my homework, I often play it with my friends in the park. When I play volleyball, I feel healthy and strong.
I like playing volleyball because it helps me get new friends. When I go to the beach, my family and friends play volleyball with me. And we have a lot of fun. I want to be in a team before summer comes. It is so much fun to play volleyball. I love volleyball so much.
1. What's the writer's hobby?| A．Playing football. | B．Playing volleyball. | C．Swimming. |
| A．In the park. | B．In the school. | C．At home. |
| A．Her mother asks her to do it. | B．She is in a volleyball team. | C．It makes her happy. |
| A．Volleyball makes the writer healthy. |
| B．Playing volleyball helps to make friends. |
| C．The writer can't play volleyball in summer. |
| A．A beautiful girl | B．My hobby | C．A volleyball team |
【推荐2】For thousands of years, people have tried to find ways to keep food for longer. In the past, it was hard to find food, especially when winter came. They needed to make fresh food last as long as possible.
| Drying is one of the oldest ways to keep food. If water is removed from food, bacteria(细菌) can’t grow. In ancient times, people in hot countries simply left fruit and meat outside to dry in the sun and the wind until its natural water was all gone. This made the fruit last a very long time. |
| Salting food, especially meat and vegetables, is another very old way to keep food. Bacteria cannot grow in a very salty environment, so salted food lasts a long time. In many countries, salt meat like fish, pork, beef has become a traditional food and people still eat it today. Korean kimchi(泡菜) is still popular around the world now. |
| A new method of keeping food is freezing. In the 1900s, a scientist called Clarence Birdseye found that freezing food could slow down the growth of bacteria. So he invented a way of fast—freezing food. Frozen food was first sold in 1930 and was very popular, especially in North America. |
| A．How to make delicious food | B．What to do with fresh food |
| C．Where to put fresh food | D．How to keep food for longer |
| A．drying | B．salting | C．freezing | D．packing |
| A．Their house was too small. | B．They had no boxes to keep. |
| C．The water inside could be gone. | D．The fruit and meat went bad. |
| A．Salting food is more delicious. | B．It was widely used in ancient times. |
| C．It was invented by Korea. | D．All of the above. |
| A．there is no water inside the food | B．it’s easy to do |
| C．it’s difficult for bacteria to grow inside | D．it costs little |
【推荐3】Plants are rooted (扎根) in one place. They can’t run away from danger or walk over the sunny side of the garden. So they have to develop some special ways to protect themselves and grow in the nature.
Some scientists found that plants can sense their surroundings (环境). You’ve all seen plants grow towards light which is called phototropism. Even if the top of them are cut off, the plants don’t change the direction. They sense the light and tell the rest of the plants how to grow then.
Some plants “talk” with each other by using “airmail (航空信)” to warn each other of danger. Researchers in England cut the leaves of cabbages. The cabbages then produce a tiny number of chemicals (化学物质) that protect themselves from some insects. Strangely, the cabbages which aren’t cut nearby also begin to give off their own different chemicals. That means they seem to receive a warning from their cabbage neighbors.
Most amazingly, plants have a great system (系统) of communication that can connect nearly every plant in a forest by fungi (真菌). It connects the roots of different plants to each other. Scientists call the system the “wood wide web”, similar to the Internet we use. Using the network, plants can communicate and share information and even food with each other.
Whatever the case is, plants are stranger and more wonderful than we can imagine.
根据短文内容选择最佳答案。
1. The underlined word “phototropism” in paragraph 2 means ________.
| A．摄影技术 | B．避光性 | C．向光性 |
| A．protect themselves | B．sense the light | C．change the direction |
① sense ② thinking ③communication ④ hearing
| A．①④ | B．②④ | C．①③ |
| A．making noises | B．connecting the roots | C．using the Internet |
| A．Plants can protect themselves and grow in the nature in some special ways. |
| B．Even if the top of the plants are cut off, they can still change the direction. |
| C．Some plants can communicate with each other and warn each other of danger. |
