科普类 知识点题库

    Have you ever been angry with your parents about putting away the iPad or turning off a video game? Most families are having these fights. In 2018, Brigham Young University and Deseret News did their American Family Survey (调查). It showed that the Number One worry for parents about teenagers was too much technology (科技).

    If you're in school now, you may not remember a time before there were smartphones and tablets everywhere. The iPhone came out in 2007 and the iPad a few years later, in 2010. But screen (屏幕) time is nothing new. When your parents were growing up, they watched as much television as you do now, or even more. They probably played video games, too.

    Mobile devices (设备) are different, though, because they can come with us everywhere we go: to the dinner table, to restaurants, into the car, into the bedroom when we're going to sleep. They are always trying to make us pick them up or keep using them. That's part of what makes smartphones smart! But it also means that they always stop us from having family time. And unlike with TV, which people often watch as a family, everyone—including parents—is now distracted (分心) by his or her own little machine.

    Studies show that too much screen time can cause problems. More than two hours a day of screen time raises your risk of being overweight. Too much screen time at night stops you from getting healthy sleep. Children who grow up with the most screen time (several hours a day) can have a hard time doing well in school. And many families fight about screen time, which is no fun for anyone.

    The solution is to talk about screen time. Make an agreement with your family about where, when, and how you are going to use computers and other devices. No more than an hour a day is suggested for children during the school week. Parents, too, should put down their phones.

    When you do use a device, remember to enjoy it with your family, perhaps by playing games or watching a movie. The American Academy of Pediatrics says it's the best way for children to grow up healthy in our digital world.

Traffic rules help to keep order on the road. They also help to keep People1. The pedestrian (行人) has as many rules to2as the driver of a car. You should walk on the sidewalk (人行道) or at the side of the road. Always look3before you walk across the street.

If you like riding a bike, don't ride4the middle of the road or run through red traffic lights. When you ride a bike with a friend, don't look around or talk.

If you drive a car, you should5at the traffic lights. You must always6a seat belt (安全带). Without belts7 the driver and the passengers may be badly hurt in a suddenly accident.

You may not need8 a bus, but look out if you have to travel in one. Get on or get off a bus when it comes to a9. When it is full, don't try to get inside,10you may fall off.

Traffic rules are also called Road Safety rules. The maxim(格言)for all road users is" Thinking about others".

In sci-fi movies, you might see cars that can drive by themselves—you tell them where you want to go, and they take you there as fast as possible. With 5G, cars like this may soon come to our real life.

Finland's "robot buses" are a good example. Telecoms company Nokia has fixed 5G transmitters (信号发射器) in 15 lampposts(路灯柱) along a 1-km road. These transmitters are able to control the buses, making them driverless.

There are also 5G roads. These roads would also have many 5G transmitters. They can provide smart services, such as telling you where the nearest gas station is. These roads could also be used to control traffic. “Transport bodies will be able to manage a road network (网络) in real time, controlling things like traffic lights through computer programs,” said Guy Matthews, director at CGI UK, a tech consultancy company.

Public transportation (运输) can also be improved by 5G and smart technology. In the South Korean city of Seoul, a smart management system has been set up in one of the city is subway stations. This system can do many smart things, including a 3D map, sensors (传感器) and an advanced camera system that make the station more convenient and safer.

And of course, there are driverless cars. These cars can send signals (信号) to each other. They also "talk" to traffic lights and road sensors. 5G will allow these cars to drive more safely because they can communicate with each other, as well as with traffic lights and road sensors.

If wearing Google Glass- a pair of smart glasses—on your face isn't cool enough, you might want to take a look at Nokia's new skirt. It's made of 80 mobile phones! It's believed to be the world's first smart skirt and has been shown at London Fashion (时装)Week. The smart skirt was created by the mobile phone company Nokia, fashion designer (设计师) Fyodor Golan and creative design house Kin.

It's not easy to make a smart skirt. It took three months to complete it. The biggest challenge in making the skirt was getting all of the mobile phones on the skirt, and allowing all the mobile phones to work together. The screens are all connected to a computer. As the skirt moves, the screens change color and the skirt looks like silk. That's not the only trick. The mobile phones are also connected to a hidden camera in the wearer's hat. The screens can show what the wearer is seeing.

Unsurprisingly, the skirt won't be making its way to shops. Instead, it's more of an art piece. Nokia said they wanted to find a way to connect the smart technology and fashion together. “We used drawings, 3D printing, and programming languages to 'build' the skirt, " explained Nokia.

The Information about Some Great Inventions

    Renewable energy is the energy that can be used again and again The sun and the earth are sources(来源) of renewable energy Here is some information about it.

How to be Patient

    Have you ever been stuck in a long, slow-moving lunch line? If so, you are not patient, or we say, you have felt impatient You have this kind of feeling when things aren't happening as quickly as you want them to.

    Impatience is something you can learn to control, though A few simple ways can help quiet your impatient feelings  

    How to be patient in the moment?

    ☆Find out what is causing your impatience.

    Try to find out what is causing this feeling Ask yourself, "Why am I feeling this way?"Maybe you are in a situation that is not like what you planned For example, maybe you are very hungry You thought you could get lunch in the dining hall quickly, but there is a longer line than you expected Now you have to wait.

    ☆Take a deep breath.

    Close your eyes and breathe in deeply Hold your breath for a second and let the air out slowly You will feel your body calm down Sometimes impatience makes us say or do things we feel badly about later Deep breathing can make you stop for a moment.

    How to learn patience for the future?

    When you feel impatient, write about it Be sure to include your thoughts and feelings, too Later, read what you wrote and look for ways You may notice that similar situations always make you feel impatient The next time you are in this situation, you will be more prepared.

Everybody has a home. Animals also have their homes. People live in many different kinds of houses. Animals have different kinds of houses, too. Some animals live in holes under the ground. Woodchuck lives under the ground. Its home has two doors. If any enemy comes in through one door. The woodchuck will go out through the other one. Some animals live in holes or in trees. Squirrels build their nests high in the trees. Birds also live in holes or in trees. And most of them live in their nests. Only hawks build their nests high in the mountains.

You have been told to wash your hands many times a day to help stop the spread of the novel coronavirus. But what about the mobile phone that you're always using? Scientific studies have shown that the virus can live for two to three days on smooth materials like plastic and stainless (不锈钢的)steel. Experts suggest cleaning all" high touch" surfaces every day, including phones, keyboards and computers. However, few people know how to do the cleaning. Here are some things not to do when cleaning the phone.

◆Do not spray(喷) cleaners directly on the phone.

◆Do not put the phone into any cleaning liquids.(液体)

◆Do not use tools that use forced air, which are often used to clean computer keyboards.

◆Do not clean the phone with hard materials. They could make small cuts on it.

So, what is the right way!? Below are some suggested ways to clean the phone. With any of these suggestions, be sure not to get the phone wet.

◆Start turning off the phone. Make sure the phone is not connected to the electricity.

◆Use cleaning cloths with70 percent alcohol(酒精)instead of the common ones.

◆Use paper cloths, or other soft like those you use to clean the eyeglasses. It's OK to cover the cloths lightly in cleaners. But do remember to clean the phone" "gently".

Cleaning the phone is one of the measures that are helpful in keeping away from the novel corona vine

You should clean your own phone often and tell others the correct ways to do it.

Public toilets arc known for a number of things, and they're almost all bad — dark, dirty, smelly, scary, and depending on where they're located, crowded. There's nothing worse than needing to use the restroom only to catch sight of a public toilet and then walk up to see that it s occupied （占用）.However, the first transparent （透明的）public toilets in Tokyo arc way cooler than you can imagine.

Designed by Shigeru Ban Architects, a Pritzker Prize-winning architecture company, the two new sets of transparent toilets have been built in two Shibuya parks in Tokyo. The toilets are lined with transparent glass. When not in use, the three stylish units are almost completely see-through, with purple glass for men and pink for women, as well as a yellow unit （br changing babies. The real trick, however, comes when you enter and lock the doors.

Nobody wants to have people watching them while lhey're doing their business. When you lock the doors, the glass panels turn opaque to provide privacy. When the door is unlocked, the glass becomes transparent once again.

"This allows users to check the cleanliness and whether anyone is using the toilet from the outside says a statement on the project's official website, Tokyotoilet.jp. At night, the toilets lights up the park like a beautiful lantern "

It remains to be seen whether people in Tokyo will decide that these new and improved restrooms arc worthy of use, but I can't imagine why anyone wouldn't want to spend some time in them.

You might have seen beautiful rainbows in the sky before. They form when sunlight falls on water drops in the air. But in fact, moonlight can also create rainbows in the same way. They are called "moonbows". They are similar to rainbows, but they are created by moonlight instead of direct sunlight.

Moonbows are rarer than rainbows. Different weather and astronomical (天文学的) conditions have to be just right for moonbows to be created.

The moon has to be very low in the sky — only 42 degrees from the horizon (地平线). The moon period has to be a full moon or nearly full. The sky must be very dark for a moonbow to be watched clearly — any bright light can obscure it. Water drops must appear in the air in the opposite direction of the moon.

Moonbows appear on the opposite side of the moon and usually look white to the human eye. This is because their colors are not bright enough to be noticed by the human eye. It is possible, however, to view the colors in a moonbow using long exposure (长时间曝光) photography.

Moonbows more often appear in some locations around the world. Most of these locations usually have waterfalls, which create thin fog in the air. Some of these locations are the Yosemite National Park in California and Cumberland Falls State Resort Park in Kentucky, US; Victoria Falls on the border of Zambia and Zimbabwe; and Waimea in Hawaii, US.

Moonbows do really happen. So at a certain time and a certain place, when a moonbow happens to appear, you can't miss it if you're right there.

Dinosaurs once lived on the earth for a long time. They suddenly disappeared millions of years ago. What happened to them? That's still a mystery(迷). People never stop searching for the answer.

Some US scientists say it is because there were not enough male(雄性的) dinosaurs. They got this idea after researching crocodiles(鳄鱼).

Mother crocodiles lay eggs and later baby crocodiles come out. The local temperature decides the sex(性别) of the baby crocodile. When the eggs are at a temperature of 26℃ to 30℃, the babies are all girls; when the temperature is 30℃ to 34C, there are both boys and girls; when it is 34C to 36℃, only boys are born.

Dinosaurs' babies also came from eggs. So scientists have given us a new picture: millions of years ago, it suddenly became very cold. Almost all dinosaur babies were girls. There were fewer and fewer male dinosaurs. Mother dinosaurs could not give birth to more babies. Finally, these powerful animals disappeared.

Imagine the situation. You are an exchange student from China and now you are learning French in a university in Paris，the capital city of France．One day，you come into the kitchen of your flat. Twenty minute later, you cook several delicious French dishes. To everyone's surprise，you learn the French language at the same time! This kind of wonderful kitchen is called a French Digital Kitchen or a"talking kitchen". What do you think of the"talking kitchen"？A French Digital Kitchen was invented at Newcastle University in the UK．It teaches students how to cook French food and speak French at the same time．For the first time，students can learn the language by following cooking steps．

All grammar and vocabulary have been carefully chosen to make sure the users can understand French well．After learning for some time，the users can test themselves by doing a short test on the computer．

The kitchen project was started by Professor Paul Seedhouse. He began to show interest in the idea after he visited another kind of talking kitchen. He said，"The purpose of the French Digital Kitchen is to make learning a language more interesting and more educational．"

How does the kitchen work？There is a computer in the kitchen. With this computer，the users can first choose a French recipe（菜谱）that they want to follow．Using information in the computer，the kitchen starts to teach the users how to make a French dish．If you follow the instruction（说明） on the computer，it moves on to the next．If you go wrong，the program goes back and repeats the recipe or information．

The new kitchen can be used in schools，universities and even people's homes．The researcher are working hard to develop the Digital Kitchen that can speak different languages.

When we think of paper, we think of newspapers and books. But there are many uses. Only half of the world's paper is used books and newspapers.

Paper is very good for keeping you warm. You have perhaps seen homeless men on a large number of newspapers. In Finland, it is sometimes -40℃ in winter. The farmers wear paper boots(靴子) in the snow. Nothing could be .

Each year, more and more things are made of paper. We have had paper cups and plates for a long time. But now we hear that chairs, tables, and beds can be made of paper. With paper boots and shoes, you can paper hats, paper dresses, and paper raincoats. When you have used them , you throw them away and buy new ones.

The use of paper seems to be paper houses. These are not small houses for children to play in, but , big houses for people to live in. You can buy a house with three rooms for about 500 dollars. You can put it up by in a few hours, and you can use it for about five years.

If you go to Australia, you can see koalas everywhere. It's a kind of cute animal only to be found in Australia. They are a symbol(象征) of Australia. And they are sent to other countries like America, China, France as a gift. But they are all kept in zoos in these countries. You can see them in the wild only in Australia. They have no natural enemies(天敌). The koala's favorite food is only the leaves of the eucalyptus tree(桉树).

Victoria State is in the southeast of Australia. In Victoria, the koalas are becoming more and more in these years. This is a problem because the koalas nearly eat all of the eucalyptus trees and then they have nothing to eat.

These days, people move 500 koalas to other forests（森林）, and they want to keep the number of koalas down. However, it will be some years before the eucalyptus trees grow back again.

At 00:23 Beijing Time on October 16th, 2021 China's spacecraft Shenzhou-13 launched into space. Three astronauts began China's longest mission ever at space station module. Do you know what an astronaut's day is like? Now please follow us and see.

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Every morning you get up, wash your face, brush your teeth, eat breakfast and get ready for your day. These daily actions are so common that you don't think about them much. But what if you were in space?

The most important thing to remember about living in space is that there is no gravity, so weights are not as heavy as they are on the earth. When you drop something, it doesn't fall to the floor. It floats (飘浮) slowly away in the air. And how do astronauts drink? In space, water just breaks into small drops and hangs in the air.

Well, astronauts eat and drink differently in space. They have special dishes so that their food doesn't float away. They use special bags for drinks so that the drink stays inside.

Sleep is also different in space. Astronauts tie themselves to the wall so that they don't float around when they are sleeping. Since they have to work hard, they need to get plenty of rest. The sun rises and sets so often that it's hard to tell the time. The astronauts have clocks and sometimes music to wake them up.

Exercise is important for astronauts as well. Since astronauts float instead of walking or running, their muscles (肌肉) become weak very quickly. They have to exercise on special machines every day so that this doesn't happen. No one wants to become ill in space and exercise helps them stay healthy.

However, it is not all hard work in space. When they are not doing science experiments, writing reports or exercising, there is a little time for fun. They watch movies, read the news and call family members and friends. The astronauts on the International Space Station can even connect to the Internet.

At around 3:40 pm on December 9,2021, astronauts(宇航员) of the Shenzhou XIII spaceship(宇宙飞船), Zhai Zhigang, Wang Yaping and Ye Guangfu, appeared on screens. Welcome to Tiangong class!", lots of students heard their voices from the Chinese space station. The first lesson of "Tiangong class" started.

The ground (地面)main classroom is in the China Science and Technology Museum, and there are other ground classrooms in Nanning, Wenchuan, Hong Kong and Macao. The lesson was made through video calls. The three "teachers" left no stone unturned(想尽办法) for this lesson. They made many preparations, and it was very successful.

Wang Yaping showed students things that astronauts need for their everyday life in space. The three astronauts also carried out some interesting experiments (实验). "Water ball" drew students' attention (注意),and they felt it was unbelievable. At the end of the lesson, they answered the questions of the young viewers (观看者).

Lots of school students across China watched the 60-minute lesson on television or the Internet.

Many students said they couldn't wait to have their next space lesson. Chinese astronauts will give more lessons in the future. It will, surely push young people to dream about space and study science.

The inventions are making the world a better place. Here we'd like to introduce some most exciting inventions for you,

Many Chinese parents put their children in the first place and hope their children can have a good future. Chinese children are 1 of their parents. Parents like to make their children do what they want, 2 learning a musical instrument(乐器) to finding a close friend.

3 is it like to be a Chinese parent? Now Chinese video game players can learn about it in a new video game called Chinese Parents. It is very 4 because they think it easier than other games.

In the game, players plan the life of their e-children. It 5 with the new baby. Then players must help the child in the game get a higher score to get into a 6 school. It's a challenge(挑战) for many Chinese parents. It also asks players to give their e-children free time for 7 like playing basketball or watching films. These can help them have a happy and healthy life.

"I didn't understand many things my mum made me do when I was young," said Kang Shenghao, a middle school student in Shanghai. "8 after I play the game, I start to understand my parents more."

Play the game and walk a mile in your 9 shoes. You may get to know what the game wants to tell us—children and parents should understand 10. Don't forget to say thank you to your parents when you finish the game!

There are several different kinds of sea turtles in the world. The sea turtles are endangered. Several are in danger of being gone (complete). Sea turtles lay large groups of eggs under the sand on beaches. The eggs face many challenges, both natural and man-made. In Costa Rica, one big challenge is poachers — they take the eggs in order to sell (they). It is against the law.

Kim Williams-Guillen is scientist. She works for the University of Michigan and Paso Pacifico. She works (protect) animals in Costa Rica. After (watch) some TV shows, Kim Williams-Guillen suddenly had an idea — what if poachers could be followed by using a fake (假的)turtle egg a GPS tracker (跟踪 器)inside?

Dr. Williams-Guillen showed that idea and it won a $10, 000 prize. She then worked with other scientists to create the fake egg. It was made of a special material just like a ping-pong ball. It only cost a little money, they made a lot of fake eggs. The scientists put some fake eggs into 101 (difference) turtle nests on four beaches in Costa Rica. The results showed that most eggs (44) (sell) to local people. That wasn't a big (surprised), since in Costa Rica, turtle eggs are considered a special kind of food.

The scientists are excited about the results of the fake eggs. The test shows that such simple ways can work well. The scientists believe that similar ideas could be helpful in other places as well.