Why is it called Mars? You might have asked yourself this before. Well, Mars is the name of the Roman god of war. People have seen the planet as a symbol of war for thousands of years. The ancient Greeks called the planet Ares after their god of war. Chinese people called it the“fire star" for the same reason.
Scientists have been interested in the planet since long before any space tasks. Egyptian scientists first saw Mars in the sky more than 4,000 years ago. Since then, people from all over the world have studied the planet.
Over the years, scientists have continued to study the planet and learned some basic things about it.
Mars is 10 times lighter and about 6 times smaller than Earth. Earth is 93 million miles (about 150 million km) from the sun, while Mars is 142 million miles away. That means it is much colder on Mars. In fact, the average temperature on Mars is - 62℃. Scientists found water on Mars long ago, but because of the low temperatures there, it is frozen. One day on Mars is called a sol and is about 40 minutes longer than one Earth day. The Red Planet's surface gravity is only 37% as strong as Earth's, meaning you would be able to jump nearly two times higher on Mars.
1. What did the ancient Greeks call Mars?| A．Mars | B．Ares | C．The“fire star" | D．The Red Planet |
| A．Chinese scientists first saw Mars. | B．Mars is lighter and bigger than Earth. |
| C．Earth is father from the sun than Mars. | D．A sol is about 1480 minutes. |
A． Earth Mars |
B． Earth Mars |
C． Earth Mars |
D． Earth Mars |
| A．history book | B．story book | C．science book | D．art book |
相似题推荐
On December 25, 2021, a new and exciting age of space science started when the James Webb Space Telescope was launched* into space. According to NASA, Webb is the largest and most powerful space science telescope ever built.
At first, Webb was planned to cost half a billion dollars and launched in 2007. But it turned out to be impossible. As designed, Webb’s orbit* is about 1.6 million kilometers away from the earth. It is too far for the astronauts to repair if it breaks down. So everything has to work perfectly on the first try, and it is the main reason why NASA spent nearly 30 years and 10 billion dollars getting it ready for launch.
Considered as a successor* to the old Hubble Space Telescope, Webb will allow us to look deeper into the universe than ever before. Hubble mostly sees what we see—which is known as visible light. But Webb is designed to focus on the infrared* light, which is invisible to the human eyes. That means Webb can see through dust* in the universe and make new discoveries by examining stars inside those dust clouds. It will try to collect light from the very first stars when the universe was young. By collecting the light, the telescope can see galaxies as they appeared in the past, which could help to explain how the universe began. It will also study the planets around other stars, looking for signs of life.
In order to collect the light and focus it into its camera, the mirror* Webb uses is 6.5 meters across much larger than Hubble’s 2.4-meter-wide mirror. The size advantage gives Webb 6.25 times more surface area to collect light in the universe, letting it see further and more detailed. However, the mirror also needs to be small enough to fit into a rocket to be launched into space. To fit the telescope in the rocket, engineers built the mirror with 18 honeycomb-shaped segments* that could fold up. And during Webb’s journey to the orbit, they will unfold, creating one large mirror.
Now, Webb has been in its orbit for several months, and it will send back its first images in June. By the time, the results will prove it is of great value to put so much time and money in building it.
1. NASA put off sending Webb into space because ________.| A．there wasn’t enough money for the further research |
| B．Webb’s orbit was too far away for the rockets to reach |
| C．it was not necessary to send Webb into space so early |
| D．it was hard to make Webb work excellently in its orbit |
| A．costing much more efforts to be designed and built |
| B．working in a shorter distance away from the earth |
| C．using a 2.4-meter-wide mirror to collect more light |
| D．collecting infrared light to explore the start of space |
| A．People still need to be patient for the results of Webb’s first try. |
| B．It’s close to the orbit and will send back its pictures this summer. |
| C．The mirror it uses has been half unfolded since it was launched. |
| D．It is the largest and most expensive space telescope in the world. |
| A．Future of Making New Space Telescope |
| B．A Space Telescope with High Expectation |
| C．Challenges for exploring further universe |
| D．A Special Mirror for Collecting Lights |
【推荐2】Are we alone in space? Is the Earth the only planet that has life?
On Feb. 22nd, NASA said they found seven Earth-like planets (行星).
For scientists, the finding is not an end. Next, they will try to find out if the planets have atmospheres
| A．That seems too far away from us. |
| B．They all nearly have the same size as Earth. |
| C．These are big questions in the science world. |
| D．It means there could be liquid water on them. |
| E．The seven planets are very close to one another. |
【推荐3】When you look at the sky at night, the Moon looks bigger than the stars. Actually (实际上), the Moon is much smaller than the stars and the Sun. But the Moon is much closer to us than any star. That is why it looks so big.
The Moon moves around the Earth. It makes one trip in about four weeks. The Moon looks flat (平坦的) to us. But it is a round (圆形的) ball, like the Earth.
People once thought the Moon had fire on it. They thought the fire made it bright. Now we know the Moon is like a mirror. It gets its light from the Sun.
The sunlight comes from the Sun too. The Sun gives us light and warmth (温暖). It makes plants grow and turns leaves green. It makes life possible on the Earth. It is a life-giving star.
1. How long does it take the Moon to travel once (一次) around the Earth?| A．Less than a week. | B．Nearly a month. |
| C．Half a year. | D．More than a year. |
| A．Because there is some fire on it. | B．Because it is near the Sun. |
| C．Because there is a big mirror on it. | D．Because it gets light from the Sun. |
| A．The Moon is much smaller than the stars and the Sun. |
| B．The Moon is much bigger than the stars and the Sun. |
| C．The Moon had fire on it. |
| D．The sunlight comes from the Moon. |
| A．Because it gives us water. |
| B．Because there are some living things on it. |
| C．Because plants and animals can’t live without it. |
| D．Because people have to live in the dark without it. |
| A．Interesting facts about the Moon | B．The Moon and the Sun |
| C．Light from the Sun | D．The Earth |
【推荐1】There is an old saying: “Laughter is the best medicine”, and modern research certainly shows that laughing is good for you. When you have a good laugh, you exercise your muscles (肌肉), strengthen your heart and balance your body chemistry. However, these are the results of having a laugh. Then, why do we do it?
Until recently, scientists believed that laughter was a human behavior only. They argued that people find jokes funny because we can put ourselves in another person’s shoes, and that animals can’t do that. People don’t all have the same sense of humor. Sometimes there isn’t any joke, or we may not have heard it, but we laugh because the people around us are laughing. How long and how loud we would laugh are also shared. We just go on following the example with one another until the laughter disappears.
Many pet owners believe that animals have a sense of humor, too, For example, pet dogs often run away with a shoe and then stop, inviting their owners to run after them. Dogs even seem to smile when their owners join in the game. As the game continues, our pets make noises that are very like laughter. You can compare this behavior to the laughter of a baby, who continually throws a toy down, waits for the adult to pick it up and throws it down again.
Perhaps laughter is just a sign that we are having fun. Fun, like laughter, is best when we share it with friends.
1. The main idea of the first paragraph is ________ of having a laugh.| A．the causes | B．the results | C．different ways |
| A．people have the same sense of humor |
| B．both human and animals can find jokes funny |
| C．sometimes some people laugh because people around them do so |
| A．pet dogs are very naughty |
| B．animals have a sense of humor, too |
| C．animals are more humorous than human beings |
| A．nervous | B．angry | C．happy |
| A．share fun with friends | B．play games with babies | C．make friends with animals |
【推荐2】Foreign visitors are often puzzled in Japan because most streets there don’t have names. In Japan, people use landmarks instead of street names. For example, the Japanese will say to travelers,“ Go straight down to the corner. Turn left at the big hotel and go past a fruit market. The post office is just across the bus stop. ”
In the countryside of America, usually there are not many landmarks. There are no mountains. So the land is very flat. In many places there are no towns or buildings within miles. Instead of landmarks, people will tell you directions and distance. In Kansas (堪萨斯州) , for example, people will say, "Go north two miles. Turn east, and then go another mile.
People in Greece sometimes do not even try to give directions because few visitors understand the Greek language. Instead of giving you the direction, a Greek will often say, “Follow me.” Then he’ll lead you through the streets of the city to the post office.
Sometimes a person doesn’t know the answer to your question. A New Yorker might say, “Sorry, I have no idea.” But in Yucatan, Mexico (墨西哥) , no one answers “I don’t know.” People in Yucatan think “I don’t know” is not polite. They usually give an answer, often a wrong one. A visitor can get very, very lost in Yucatan!
One thing will help you everywhere. You might not understand a person’s words, but maybe you can understand his body language. He or she will usually turn and then point in the correct direction. Go on in that direction and you may find the place where you want to go!
1. What do the Japanese use to give directions?| A．Landmarks. | B．Street names | C．Big hotels. | D．Fruit. |
| A．big landmarks | B．towns and buildings | C．names of the farms | D．direction and the distance |
| A．Because the street names are hard to remember. |
| B．Because there are too many roads there, and visitors can’t find the way easily. |
| C．Because few visitors can understand their language. |
| D．Because people in Greece have a lot of spare time. |
| A．English | B．Body language | C．Simple sentences | D．Names often streets . |
| A．All the streets in Japan have no names. . |
| B．people in Greece may lead you to the place when you are asking the way. |
| C．Names often streets are not always useful when you are asking the way, |
| D．You can use your body language to help those who are asking the way. |
| A．How the Japanese give directions. |
| B．People in different countries have different ideas. |
| C．People from different countries give directions in different ways. |
| D．The importance of body language. |
【推荐3】A tornado (龙卷风) is a kind of strong storm with air which moves in a circle quickly. They can move over 200 miles per hour and cause a lot of damage (损坏). As they move across the land, they can easily pick up cars, trucks, and even houses, and then throw them very far. It is important to find a safe place if a tornado gets close.
A safe place could be a basement (地下室) or the lowest floor. If you are in a home without a basement, try to find a first-floor bathroom or a small room without windows in the middle of your house. You should curl up (蜷缩) into a ball and cover your head and neck with your hands.
But there are some people who actually want to get close to tornadoes. They are scientists who want to learn more about tornadoes. One of the best ways to do this is to get as close as possible to the tornado. They use special tools to measure (测量) what is happening in and around a tornado.
One special tool is called a tornado probe (探测仪). Inside the tornado probe, there are sensors (传感器) to measure wind speed, temperature, pressure, and direction. Some probes even have cameras, so the scientists can see and understand what it’s like to be in a tornado.
To be able to get these measurements, the scientists have to get a tornado probe near or into a tornado. Scientists will try to guess where a tornado will go next. Then they drive to that location and put down the probe. If they do not guess correctly, they pick up their probe and try another place. If they are right, the tornado will go near or even right over the probe. Then they take all of the measurements from the probe and use them to predict where future tornadoes may form (形成) and travel. And they can give people some warning to keep away from a dangerous tornado.
1. If a tornado gets close, what should people do to keep safe?| A．Go to a basement. | B．Find a small room. |
| C．Stay in a bathroom. | D．Curl the legs up. |
| A．They risk their lives studying tornadoes. |
| B．They can easily put the probe in the right place. |
| C．They get close to a tornado to admire it. |
| D．With the help of the measurements, they can prevent the tornado forming. |
| A．what a tornado is |
| B．how dangerous a tornado is |
| C．where a tornado may form and travel |
| D．how scientists do research work on tornadoes |
【推荐1】TOKYO, JAPAN-- What do you do when you see a cockroach? Do you hit it with a newspaper? Do you step on it?
When researchers at Tokyo University see a cockroach,they take the remote control and make the cockroach turn around,run left or right,or go forward.These scientists are changing the cockroaches into robots. Each cockroach has a very small pack that has a microprocessor in it. Then researchers can send signals from the remote control to the packet. The signals control the movements of the cockroaches.
Why does anyone want to control a cockroach? "Insects can do many things that people can't,” says Isao Shimoyama, head of robot research at Tokyo University. In a few years, he says, these robot insects will carry very small cameras. They will be able to move through earthquake rubble to look for people or move under door to find information about someone.
This may seem strange, but the Japanese government thinks the research is very important. The government is giving the scientists $5 million for this research.
First, the researchers breed hundreds of cockroaches. They use only the American cockroach because it is bigger and stronger than other cockroaches. Then they choose the best cockroaches and remove their wings and antennae. They put small packets where the antennae were. The packets weigh about three grams, or about two times the weight of the cockroaches themselves. “Cockroaches are very strong,” says Ralph Holzer,who is a researcher at Tokyo University. "They can lift 20 times their own weight.”
With a remote control, the scientists send signals to the packets. When a cockroach gets the signal, it moves. The problem is that the cockroaches don' t always move in the right direction.
1. The scientists are changing the cockroaches into robots because________.
| A．they want cockroaches to take photos of the earthquakes |
| B．they want to send signals to the packets on the cockroaches |
| C．they want to control the movements of cockroaches |
| D．they want cockroaches to do things people can't |
| A．They can turn around, run left or right or go around. |
| B．They can help people to carry very small cameras. |
| C．They can search for those people in rubble after an earthquake. |
| D．They can breed hundreds of cockroaches. |
| A．by removing their wings | B．by using very small cameras |
| C．by removing their antennae | D．by sending signals from the remote control |
| A．The cockroaches sometimes don't move. |
| B．The cockroaches sometimes move in the wrong direction. |
| C．The cockroaches are too big to move through earthquake rubble. |
| D．The cockroaches often lift 20 times their own weight. |
| A．The cockroaches | B．The signals |
| C．The cockroach robot | D．The researchers |
①AI is used in many ways to make our lives better. For example, AI-powered robots can help doctors perform surgeries with more precision. AI can also help teachers by giving special lessons to students based on their learning speed and style. In our homes, smart speakers and home assistants can control lights, play music, and even tell us the weather.
②However, when it comes to disinformation (虚假信息), “Social media took the cost of spreading to zero, and AI takes the cost to zero,” says Renee DiResta of the Stanford Internet Observatory. Large language models such as GPT-4 make it easy to produce misleading news articles or social-media posts in a huge number.
③And AI can produce mor than text. Cloning (克隆) a voice using AI used to require minutes, or even hours,of sample audio. Last year, however, researchers at Microsoft created VALL-E, an AI model that is able to clone aperson’s voice from just a three-second clip (片段) of them speaking, and make it say any given text.
④OpenAI, the American company behind GPT-4, has developed a similar tool, Voice Engine, which canclone any voice from a 15-second clip and no one can find the difference. It has not yet released (发布) to public, because of its possible risks to the society.
⑤Similarly, Sora, from Open AI, can produce surprisingly realistic videos of up to a minute according to the given text. Open AI has not released Sora to the public, partly because it could be used to create disinformation. Another worry is that many people will lose their jobs in the video industry because of Sora.
⑥Though all of this is worrying, it is worth remembering that not all parts of the technology are bad. AI, it turns out, can be used for fighting disinformation as well as producing it. Anyway, it’s time to think about how we use AI. We need to make sure it’s used responsibly and for the good of everyone. Plus, who knows? Maybe one day, you could be the one creating the next big thing in AI!
1. How does the writer lead in the topic in the beginning?| A．By telling a story. | B．By asking questions. |
| C．By giving examples. | D．By comparing facts. |
| A．AI is very useful in our daily life. |
| B．Voice Engine and Sora are the most useful AI. |
| C．Although there may be problems, the future of the AI is still bright. |
| D．People should take good use of AI no matter it is good or bad. |
| A．It’s a tool that can clone any voice. | B．It is produced before GPT-4. |
| C．It can also produce videos of one minute. | D．It won’t cause any risk to the society. |
A． | B． | C． | D． |
【推荐3】Many parents make their children do chores around the house. For some families, teaching children what to do and how to do chores is easy. But in other families, getting children to do some housework can be a very big problem.
It is a good idea for parents to teach their children at an early age. All family members must work together to make the house clean, and each person must do his or her share(份) of the work. We can do this by starting a plan of chores and responsibilities when children are young.
Chores are good for children—even very young ones. Doing chores can teach children many important skills like working together. Jobs also teach children what is fair. The skills and value from doing chores will be good to children all their life.
1. What does the first paragraph tell us?| A．All the parents make their children do chores. |
| B．It’s easy to teach children to do chores. |
| C．Some children think doing chores is difficult. |
| D．Teaching children to do chores is different among different families. |
| A．责任 | B．琐事 | C．爱好 | D．家务 |
| A．working together with others | B．how to write |
| C．what is fair | D．A and C |
| A．It’s a small thing to teach children to do chores. |
| B．Only the children who do chores know what is fair. |
| C．Some children like to do chores but some don’t. |
| D．In a family, young children don’t need to do chores. |
| LOST A white cat with two big blue eyes. If you find it , please call Sam at 385-0926 Many thanks. | BOOK SALE A Christmas Card by Charles Dickens A story of Christmas The true meaning of Christmas was ￥59.60 now￥29.60 |
| WHERE ARE WE GOING, DAD? Saturday and Sunday Screen Cinema ￥40 (half for children under12) Call David at 332-5147 | HOUSE FOR RENT 2 sunny bedrooms with a kitchen ￥800 a month Call Mary at 591-3127 for more information. |
1. If you find a white cat with two big blue eyes, you can call ________.
| A．Sam | B．David | C．Mary | D．Lily |
| A．￥59.60 | B．￥39.60 | C．￥29.60 | D．￥59.20 |
| A．On every weekday | B．On Friday and Saturday |
| C．On Saturday and Sunday | D．from Monday to Friday |
| A．385-0926 | B．591-3172 | C．332-5147 | D．591-3127 |
| A．Map | B．Newspaper | C．Story | D．Poster |
Instant noodles were once one of the most popular foods in China. However, they seem to fall out of favor with Chinese people day by day.
According to a survey by the World Instant Noodles Association(WINA世界方便面协会) in November, 2017, sales of instant noodles in China fell by nearly 10,000,000 packets from 2011 to 2016.
One of the reasons was that instant noodles have failed to meet the changing taste of Chinese, especially young people, who are the largest group of consumer of instant noodles. Another reason could be the online meal ordering industry(外卖行业), which has given young people more choices than instant noodles. Online meal ordering services also bring people a lot of convenience(方便). If people don’t want to cook after work, they can download an app and order what they need in the app.
Though instant noodles are becoming less and less popular, they will still be one of the foods in our life for some time.
1. These years, more and more Chinese people ____ according to paragraph 1.| A．begin to like instant noodles | B．like instant noodles best |
| C．never eat instant noodles | D．start to dislike instant noodles |
| A．The instant noodles in China sold well. |
| B．More people in China bought instant noodles as their food. |
| C．Many young people bought instant noodles. |
| D．Sales of instant noodles in China fell a lot. |
| A．消费者 | B．生意人 | C．白领 | D．零售商 |
| A．instant noodles have many different kinds of taste |
| B．instant noodles give them more choices |
| C．online meal ordering services make their life much easier |
| D．it is difficult to use an app to order food at home |
| A．Instant noodles are one of the most popular foods in China now. |
| B．Young people think the taste of instant noodles is always changing. |
| C．Young people feel online meal ordering industry is not easy. |
| D．Instant noodles will still be in our life though they are less popular today. |
A number of students jumped up to thank the teacher and left the classroom. The teacher looked at the rest students and said, "Does anyone else want to get a B? This is your last chance." Two more students decided to go. Seven students stayed. The teacher then handed out the papers. There were only three sentences on the paper: Congratulations! You have received an A in this class. Keep believing in yourself.
I never had a teacher who gave a test like that, but I think that it is a test that any teacher could and should give. Students who do not have confidence in what they have learned are B students at most.
The same is true for students in real life. The A students are those who believe in what they are doing because they have learned from both successes and failures. They have learned life's lessons, whether from school education or from events is in their lives, and have become better people. Scientists say that by the age of eight, 80% of what we believe about ourselves has already been formed. You are a big kid now, and you realize that you have some limits (局限). However, there is nothing you can't do. Sir Edmund Hillary, the first person to reach the top of Mount Qomolangma (珠穆朗玛峰) said, "We do not conquer the mountain, but ourselves."
1. Why did some students leave the classroom?
| A．Because they knew the teacher didn't like them to take the test. |
| B．Because they were allowed to take another easier exam later on. |
| C．Because they were happy with the mark the teacher would give them. |
| D．Because they thought the exam was too easy to be worth a try. |
| A．Because they answered all the questions in the exam correctly. |
| B．Because they had been promised an A by the teacher before. |
| C．Because they had been working hard for each exam. |
| D．Because they were confident in what they had learned. |
| A．发现 | B．控制 | C．探索 | D．征服 |
| A．He wants us to know what our limits are. |
| B．He wants us to learn to believe in ourselves. |
| C．He wants us to receive formal education. |
| D．He wants us to learn from B students. |
