What time is it? The answer you give can be different, because you are in different Earth’s time zones(时区). But how could you tell the time if you aren’t anywhere on Earth?
Scientists are now thinking of creating a lunar(月球的) time zone. They believe it would be better for astronauts to communicate by using Moon Time, as they travel to, from, and across the Moon. At the moment, astronauts are using time zones of their own countries. But there could be safety problems caused by the differences in time-telling.
________ Gravity(引力) influences how quickly or slowly time passes. Since gravity is weaker on the Moon, clocks run a bit faster there. After 24 hours, a lunar clock would be 56 microseconds ahead of a clock on Earth. Another point to consider is that a full day on Earth is about 24 hours between two sunsets. While on the Moon, it is nearly 709 hours, about 29.5 Earth days. This means that lunar nights can be around two weeks long, with only the Earth and the stars in the sky. With all this to think about, scientists need to decide whether it would be better to follow a time zone on Earth, or for the Moon to have its own special zone, which would have much longer days.
Scientists must consider other problems too. For example, who should be responsible for keeping the time zone going? And how can it be made practical for astronauts to use?
There are more countries planning Moon trips in the future. The idea of creating a time zone on the Moon would make these easier. And if a lunar time zone is set up, scientists could create time zones for other planets like Mars.
1. Scientists think that a lunar time zone can ________.| A．keep the Moon clean | B．keep astronauts healthy |
| C．make the Moon trips safer | D．make space travel faster |
| A．Setting up a lunar time zone is not easy. |
| B．Setting up a special time zone is important. |
| C．Scientists are holding different opinions. |
| D．Scientists need to do a lot of experiments. |
| A．56 microseconds | B．24 hours | C．two weeks | D．29.5 days |
| A．To give information about space travel. | B．To introduce the idea of Moon Time. |
| C．To describe an experience of time travel. | D．To share news about landing on Mars. |
相似题推荐
【推荐1】French doctors and American scientists have reported doing an operation in which the doctor was outside the operating room. This kind of operation is known as robotic operation.
Doctor Marescaux did the operation in an office in New York City last month, while a sixty-eight-year-old woman patient was in a hospital in Strasbourg, France.
A doctor in Strasbourg got the patient ready. He placed medical tools and a small video camera in her stomach area. Doctor Marescaux in New York watched the patient on a video screen. Then he used the computer to send messages to the robot machine. The robot moved the tools that cut the woman’s gallbladder（胆囊）away. The woman got well soon after the operation and left the hospital two days later.
Experts say the main problem with such a robotic operation is based on high-speed telecommunications between the doctor and the robot. Technology must be able to send a doctor’s order to a robot to move the tools quickly.
Experts also say a successful robotic operation will improve an operation. For example, the robot can make much smaller movements than a person can. A robot machine can turn tools in ways that a doctor’s hand cannot.
Doctors say such a robotic operation will make possible safer and better operations in the future. They say it will improve doctor training. It will also mean that doctors could do an operation on people in dangerous places far away. And it could mean that people could have operations done by top doctors without having to travel to the city where doctors work.
1. “Robotic operation” means “____”.| A．a special kind of robot invented by doctors |
| B．an operation done far away |
| C．an operation done with the help of a robot |
| D．something done to mend a robot |
| A．it can send messages at a high speed |
| B．even a top doctor can’t do the operation himself |
| C．it can make the operation safer and better |
| D．operations can be done without any doctors |
| A．top doctors | B．smaller movements |
| C．doctor training | D．high-speed telecommunications |
| A．more tools | B．a robot machine |
| C．a video camera | D．telecommunications |
| A．Robotic operation is good for doctor training. |
| B．Robotic operation has been used in the USA. |
| C．Experts speak highly of robotic operation. |
| D．The robot is used to watch the patient clearly. |
【推荐2】A 12-man Chinese team landed on the Antarctic icecap peak (南极冰盖最高点) on January 18th. They are the first people to reach the peak of Dome A (海穹A). It is 4,039 meters above sea level.
The team built a station there to study the changes of the weather, get ice samples (标本) from 150 meters to 200 meters below, and do other studies. So far, the team has got nearly 100-meter-long ice samples from a place about 130 meters under the icecap peak.
It is the first time that people have been able to get samples from the icecap peak in Antarctica and it is very important for people to study the weather changes and environment changes in the area.
The Chinese scientists have also built a weather study system (系统) at the peak. The system can send out information about the temperature, such as how strong the wind is, and many other things about the weather.
The Antarctica icecap makes up (组成) 70% of the earth’s freshwater (淡水). By studying Dome A, scientists can get the lowest temperature of the earth and other information about the world’s weather changes. We can’t get this information from other places on the earth because Dome A is the best place for this kind of studies. So it is very important to land on the peak of Dome A.
1. How many Chinese first landed on the Antarctica icecap peak?| A．18. | B．12. | C．150. | D．200. |
| A．the earth’s freshwater | B．ice samples from the peak |
| C．information about the weather | D．the news about other countries |
① They built a station to study the changes of the weather.
② A Chinese team landed on the Antarctica icecap peak.
③ The Chinese scientists built a weather study system.
④ They got ice samples from the icecap peak.
| A．②①④③ | B．②①③④ | C．③②①④ | D．②③④① |
| A．we can go there for holidays |
| B．the world’s weather must be better and better |
| C．the peak will be the best place for people to live in |
| D．our country will do better in the world’s weather study |
【推荐3】Robots seem very new to most people. But they have a long history. The first one was made by a Greek inventor. You may have seen robots in some films. The robots in these films are stronger, faster and cleverer than people. In real life, most robots are used in factories. They are used to do many dangerous, difficult or boring jobs. Some people can’t look after themselves and robots are used to help them. For example, some people can’t see. Many of these people use a dog to help themselves move around. This dog is called a guide dog. Scientists are making a robot to help them. In the future, robot dogs might take the place of these guide dogs.
Robots are also used in American hospitals. At one hospital, a robot takes from the kitchen to the sick people’s rooms. It never loses its way because it has a map of the hospital in its computer system.
根据短文内容，判断正（T）误（F）。
1. The first robot was invented by a Greek inventor.2. Robots can only be seen in films.
3. Robots can help some people look after themselves.
4. Today’s robots have few uses.
5. A robot is used to help the sick people at an American hospital.
【推荐1】Birthday is a special day for most people. We may spend much time celebrating it. On birthday, we may go for a trip, have a party or watch a movie with our parents and friends. We can also enjoy some special food. Do you know what people eat on their birthday around the world? Here are three people from different countries. They tell us what food they eat on their birthday.
Liu Jing is from Beijing. “The long noodles are a symbol of long life. In China, red is a symbol of luck. We think red eggs bring us good luck. So you can see Chinese eat long noodles and red eggs when they celebrate their birthday,” says Liu Jing.
“I am so happy because today is my birthday. I want to have a birthday party. At the party, we can play games, sing and dance. We can also eat a big birthday cake with fifteen candles. I’m sure we can have a good time at my birthday party,” says David from America.
“In Canada, people put a coin (硬币) into the cake. If the birthday person eats the cake with the coin, he or she will be lucky. I am so happy because I eat the cake with a coin,” says Sandy.
1. Where does Liu Jing come from?| A．China. | B．Canada. | C．America. | D．Australia. |
| A．举办 | B．庆祝 | C．组织 | D．担心 |
| A．13. | B．14. | C．15. | D．16. |
① watch ball games ② go for a trip ③ watch a movie ④ have a birthday party
| A．②③④ | B．①③④ | C．①②④ | D．①②③ |
| A．what to eat on one’s birthday in different countries | B．why we celebrate our birthday |
| C．three persons from different countries | D．how to celebrate one’s birthday |
【推荐2】①A growing number of Chinese mobile apps (手机应用) are becoming more and more popular around the world. From TikTok (抖音) to Bilibili, Chinese apps are getting big.
②In 2021, the money of China’s apps from foreign countries grew 204 percent year-on-year, according to a report by the company, iResearch.
③The US, Japan and South Korea were the main countries of the money for Chinese apps. More and more foreign people are glad to use Chinese apps. Downloads (下载) of Chinese apps also improved in Africa, the Middle East and Southeast Asia in 2021.
④The success of the companies has much to do with their own hard work. Researchers said that this has shown the strong creativity of Chinese companies. “There is a great future for Chinese companies in the global (国际的) world. Although it takes quite a long time to have a brand (品牌) in foreign countries, Chinese companies are good at trying something new.”said Fang Han, the head of StarMaker.
⑤For example, TikTok has taken the world by storm, giving short videos about anything. It has more than one billion downloads in 150 countries and 75 languages in the world, noted Harvard Business Review. It not only showed short videos to users according to their interests, but also taught them simple and creative ways to make their own videos. That’s why there are a lot of people who love using it to share their everyday life.
⑥The Chinese government (政府) also made great work to help companies to compete in the world. In July 2021, a government report to guide Chinese apps came out. It said the government would help more companies to create new brands. With the help of the government, the companies will work together with foreign companies in 5G.
1. In 2021, China Apps made money in foreign countries mainly from ________.| A．Africa, Japan and South Korea | B．the US, Japan and South Korea |
| C．the US, South Korea and Southeast Asia | D．the Middle East, Japan and Africa |
| A．Chinese apps will be less popular around the world. |
| B．Chinese companies spend short time creating brands in the world. |
| C．Bilibili has more than one billion users around the world. |
| D．Chinese companies will work together with foreign companies. |
| A．Apps Around the World | B．Mobile Apps in China |
| C．China’s Apps go global | D．Government Helps Apps |
A． | B． |
C． | D． |
【推荐3】Computers are wonderful machines. The Internet is also wonderful. But some people spend too much time online. They can’t stop. Doctors say this is a new illness called Internet Addiction Disorder (互联网成瘾症).
People with IAD are online a lot. They spend many hours chatting with their friends or playing games online. Many people with IAD spend more time surfing the Internet than staying with their families or friends. Some people with IAD even give up their jobs!
Do you have IAD? Think about the following questions carefully: How many hours a day are you online? When you are not online, do you want to play computer games or check your messages? When you are online, do you often lose track of time? Do you get angry when you can’t play computer games?
If you have IAD, what should you do? Dr. Ivan Goldberg and Dr. Kimberly S. Young give some advice, First, ask yourself, “Why am I online a lot?” Then try to take a break. For example, use the computer or play computer games twice a week, not every day. In this way, you can spend more time with your families or friends.
1. People with IAD usually spend too much time ________.| A．studying at school | B．working at the office |
| C．playing on the Internet | D．talking on the phone |
| A．Giving up your job to spend more time online. |
| B．Spending much time with your friends. |
| C．Forgetting your family when you are online. |
| D．Getting silent when you can’t play a computer game. |
| A． to stop going online |
| B． to take more exercise every day and protect their eyes |
| C． to go to see a doctor as soon as possible |
| D． to use the computer less often than before |
| A．A new illness—IAD | B．A computer game |
| C．Going online | D．How to use the computer correctly |
【推荐1】NASA is looking for funny astronauts. It wants to send astronauts to Mars in 2030. The funny astronauts will be part of the team.
Mars Astronauts Wanted You must be:●smart ●able to stay cool all the time ●able to tell stories and jokes You must have: ●a crazy hairstyle ●big shoes ●a big red nose |
Why does it want funny astronauts?
Flying to Mars is a long trip. It’s a challenge for astronauts. They have to stay in a spaceship for about two years. So the team needs some astronauts with a sense of humor. They can help everyone get along with each other. They can also make the trip enjoyable.
Being funny is not enough.
However, the astronauts have to be more than just funny. They also need to be excellent scientists and be able to finish hard training.
1. What should the astronauts wanted be like?| A．Strict and smart. | B．Clever and cool. |
| C．Crazy and outgoing. | D．Funny and quiet. |
| A．To teach scientists how to tell jokes. | B．To train the scientists. |
| C．To make the trip hard. | D．To bring fun to the trip to Mars. |
| A．Funny astronauts should also know science. |
| B．The trip to Mars is for about one year. |
| C．All the astronauts don’t need training. |
| D．These astronauts will get to Mars in 2033. |
| A．Health. | B．Sports. |
| C．Education. | D．Science. |
Zhai Zhigang, Wang Yaping, Ye Guangfu have come back! After flying around Earth for six months, the three astronauts(宇航员) of the Shenzhou XIII mission(任务) returned home on April 16. They successfully finished the manned spaceflight(载人航天飞行). The crew(机组人员) stayed in space for six months. It is the longest stay for Chinese astronauts in space in history. Shenzhou XIII is the fourth spacecraft to visit the Tiangong station and the second manned ship to transport astronauts to the orbiting outpost (轨道位置). Nine hours after leaving Tiangong, the capsule(返回舱) touched down on Earth at the Dongfeng Landing Site in Inner Mongolia(内蒙古). The astronauts were carried out of the capsule by ground workers and placed into chairs. They were in good condition.
1. The three astronauts flow around Earth for six months and returned home on April 16.2. Shenzhou XIII is the second spacecraft to visit the Tiangong station.
3. The capsule touched down on Earth at the Dongfeng Landing Site in Mongolia.
4. The astronauts were carried out of the capsule by ground police and placed into chair.
5. The three astronauts were in good condition.
【推荐3】
What will astronauts (宇航员) eat when a space trip takes years?
“Lots of fresh vegetables,” says Dr. Janet Williams, whose team has spent the last 10 years learning how to grow plants in a space station. And it’s a good thing that she has already started her work, because space gardening can be really hard.
As usual, astronaut George White looked into the closed plant room. He had planted Dr. Williams’s quick-growing seedlings in it, but none of the stems were showing. He opened the room to check and found the problem. The stems weren’t growing upward and the roots weren’t growing downward. On Earth, gravity (重力) helps a plant’s stems and roots to find “up” and “down”. However, in the space station, there was almost no gravity.
Dr. Williams suggested a solution: give the plants more light, as plants also use sunlight to find their way. And it worked. When the plants had more light, the stems turned up and the roots went down.
Now Dr. Williams was free to worry about the next problem: Would her baby plants live to flower? Can we grow food on a space journey?
Many plants died in the space station. Dr. Williams thought she knew why: the space plants were hungry for air. Plants live by taking up CO2 from the air. Since a plant uses it up in the air around, the plant needs moving air to bring more CO2 close to its surface. On Earth, the air is always moving. Gravity pulls down cold air, and warm air rises. And with these air movements, plants get enough CO2.
Many earlier experiments with plants in space had used closed rooms. Dr. Williams tried a new greenhouse that had a fan to keep the air move. The plants loved it. They flowered and even produced more seeds. Using Dr. Williams’s method, astronaut George completed the first seed-to-seed experiment in space, and moved one plant closer to a garden in space.
“And this,” says Dr. Williams, “is good news for long-term space travel.”
1. Why have Dr. Williams’s team tried to grow plants in space?| A．To produce fresh air for astronauts. |
| B．To help astronauts relax themselves. |
| C．To provide food for long space journeys. |
| D．To make the space garden more beautiful. |
| A．It caused the gravity to change. |
| B．It encouraged the plants to grow faster. |
| C．It helped the plants to grow in the right direction. |
| D．It showed the astronauts where to plant vegetables. |
| A．The light was too strong. | B．There was too much CO2. |
| C．There was not enough room to grow. | D．The air condition was not good enough. |
| A．the moving air | B．the closed room |
| C．the space journey | D．the space garden |
| A．They mainly live on fresh vegetables. |
| B．They have successfully built a space garden. |
| C．They invented a special fan for their greenhouse. |
| D．They have worked on space gardening for many years. |
