Today, China has conducted its first 3D printing experiment in space in a newly launched spacecraft, which was put into low-Earth orbit by China's Long March 5B heavylift carrier rocket.
Video broadcast on CCTV showed that the printer has printed a flat section of a honeycomb-shaped （蜂巢状）structure as well as a symbol of China Aerospace Science and Technology Corp, the parent company of the China Academy of Space Technology. The experiment was done by a 3D printer, developed and built by its Beijing Spacecrafts Manufacturing Factory, inside the prototype of China's new — generation manned spacecraft.
The printer, named the Space-Based Composite Material 3D Printing System, uses carbon fiber-reinforced materials to autonomously print objects. It is installed in the reentry module of the experimental spaceship, and will be brought back to Earth once the module returns.
The printer features advanced technologies in material modeling, precision control and automation. Once the space-based 3D printing technology becomes operationally ready, it can extensively benefit space programs as astronauts can use it to manufacture a lot of things they currently need to obtain from resupply flights by cargo spacecraft.
Wang Yanan, editor-in-chief of the Aerospace Knowledge magazine, said the 3D Printer will be very useful in extended space missions, such as those in a space station, because it will allow astronauts to make components quickly and conveniently in space. The technology will save future space journeys considerable resources and costs.
In fact, the device is not the only representative of 3D printing onboard the Prototype.
A CubeSat deployer, designed and made through 3D printing by CoSats Space Technology, is also carried by the spacecraft to check the adaptability of 3D-printed equipment in space. CoSats Chief Operating Officer Bai Ruixue said the 3D-Printed deployer is much lighter and stronger than its counterparts and it will have huge Potential in the space industry.
1.What did the video broadcast on CCTV show to the audience?
A.The process and the products of the 3D printing.
B.The name and the shape of the 3D printer.
C.The significance of the 3D printing technology.
D.The relationship between the two companies.
2.What if a component is broken in the space station now?
A.It has to be sent by spaceship back to earth for repair.
B.The astronauts can fix it conveniently by hand on the spot.
C.The astronauts make one using 3D printing and replace it.
D.It has to be unloaded and abandoned in space.
3.Why is the last paragraph mentioned?
A.To introduce the CubeSat deployer produced in space.
B.To explain the advantages of the 3D printing in space.
C.To show the adaptability of 3D printing in space.
D.To indicate a bright future of 3D printing in space.
4.What can be a suitable title for the text?
A.3D printing experiment conducted in space.
B.3D printing set to help ease space trips.
C.3D printing launched by Long March 5B.
D.3D printing—a new way to explore space.
A first-year undergraduate student in Chengdu, recently complained online that her mother refused to raise her monthly allowance to 4,500 yuan ( $ 633) even when she said her current allowance 2, 000 yuan was not enough to cover her expenses, sparking a debate on how much money a college student needs per month. One expert shares his views on the issue with China Daily: Students should pursue education, not comfort.
Even for a college student studying in a first-tier city in China, 2,000 yuan is enough to cover all his or her monthly expenses. In fact, for a college student in Chengdu a monthly allowance of 2,000 yuan is more than enough. According to a survey conducted by a bookkeeping platform, the average monthly expense for an undergraduate in cities other than Beijing, Shanghai and Hangzhou was less than 2,000 yuan in 2019； for Chengdu, it was 1,900 yuan.
Claiming that she can hardly afford new clothing and cosmetics with her 2,000 yuan monthly allowance, the undergraduate student in Chengdu criticized her mother for refusing to raise her pocket money. Her "meager" allowance, she said, prevented her from buying branded goods that her hostel-mates enjoyed.
By the time a person enters a college, she or he should have developed a healthy consumption habit. And a youth should adjust her or his consumption according to her or his family income. On a deeper level, the money they spend in college should depend on how much they value their parents' hard work. Besides, some college students could take UP part-time jobs to meet their monetary needs if they feel their parents don't or can't send them enough money. In this way they can also learn to meet the requirements of life in the future and develop healthy consumption habits. More importantly, they should always bear in mind that education is their top priority in college
1.What's the expert's attitude to the issue about the undergraduate student?
A.He was critical.
B.He was neutral.
C.He was supportive.
D.He was unconcerned.
2.In 2019, the undergraduates' average monthly expense in Hangzhou was
A.more than 2,000 B.633 dollars
C.less than 2,000 yuan D.1,900 yuan
3.Which of the following best explains “meager” in paragraph 3?
A.Empty. B.Pitiful.
C.Mean. D.Fruitful.
4.What does the last paragraph mainly talk about?
A.College students should keep their expenses in line with their family conditions.
B.College students consumption level is determined by their parents.
C.College students should take up a part-time job to cover their expenses .
D.College students should deal with their living expenses problems reasonably.
Being stuck at home doesn't mean that learning stops. In fact, it’s just the opposite. Here are some activities and resources to foster kids' imagination and build their curiosity at home.
Let's Get Down to the Science
The science lab at school may be closed, but you can still put on goggles and a white lab coat and learn at home. This Test Tube Experiment Kit will make you feel like a genius in no time. Kids will get the chance to learn about basic chemistry, physics, and more by creating pop-resistant bubbles, bouncy balls, and other objects.
To Infinity（无穷）and Beyond
Earth is a part of the Milky Way galaxy, but did you know there are around 100 million galaxies in the universe? There are so many fun and fascinating things to learn about space that the possibilities truly go to infinity and beyond. A great way start your child's educational space adventure is with this Real Life Sticker and Activity Book.
Take a Walk on the Wild Side
Biology class is in session! Here's your chance to get up close and personal with a great white shark without putting on a wetsuit. This 4D Great White Shark Anatomy Kit allows you to get an inside look at what makes these predators of the deep so powerful. And then take an even deeper dive into a shark's world with I Am Shark .
Take advantage of this time at home and find new ways to keep exploring the world around you.
1.What is common among these activities above?
A.They are all performed outdoors.
B.They are all associated with physics.
C.They are all carried out by the way of experimenting.
D.They all recommend some resources for kids to study.
2.Which book favors children interested in stars?
A.This Test Tube Experiment Kit.
B.Real Life Slicker and Activity Book.
C.4D Great White Shark Anatomy Kit.
D.I Am Shark .
3.The shared goal of the activities is to .
A.gain financial benefits B.save kids from boredom
C.explore new technologies D.inspire kids to study at home
阅读下面短文，根据其内容写一篇60词左右的内容概要。
When learning how to train your cat, you'll start with very basic first steps. But can you train a cat the same way you might train a dog? Yes and no. Because they're highly independent animals, cats might appear uninterested in following your commands. That doesn't mean you can't influence their behavior, though. If you're patient, your new cat or old cat can be trained in no time.
First, decide what you want your cat to learn, and then move towards your goals in small steps each day. Before you start training your cat, however, consider what commands you'll use and what types of behavioral actions you want her to learn. Think about what you may have wondered in the past: how to train your cat to use a litter box, bow to keep her calm during trips, and so on. How can you teach her to stop scratching your rugs or furniture?
Having determined which lessons you and your cat will master, it's time to get down to business. If you're excited about training, you may want to jump right in and teach your cat everything at once. However, your cat's attention span is shorter than yours; you can't expect her to stay interested every time you're ready to be the trainer. To be successful, though, it's a good idea to stick to one lesson at a time. Once your cat has mastered whatever you're working on, you can move on to the next training exercise.
When only you and your cat are at home, you don't have to worry too much about involving others in the training. Yet you still want your cat to learn to be social. Shortly after bringing your cat home, invite friends or family members over to socialize with your new pet. Just remind them not to be too forward with their introduction. If you're bringing a car into a larger family, it's even more important to involve everyone in the training. After all, she'll see these familiar faces every day!
假如你是李华，你即将结束加拿大的旅程。离别之际，请你给在旅程中为你提供帮助的加拿大朋友Peter写一封感谢信。
内容包括：1. 表达感谢；2. 分享旅途收获；3.邀请他来中国做客。
注意：1.词数80左右；
2. 可以适当增加细节，以使行文连贯；
3.信的开头和结尾已 为你写好，不计入总词数。
Dear Peter,
___________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________
Yours,
Li Hua
单词拼写
1.The president is________(敏锐)conscious of the need for more doctors and nurses to save the infected people.
2.Rubbish pictures may sound_______(恶心)to some,but it is really quite clean and great fun.
3.Everybody told me the food served in the new restaurant was delicious.Actually it was a big _______(失望)。
4.Many of the decorations are made from a_________(芳香的)type of wood native to China.
5.After leaving school,people do not often read classical novels,________(联想)them with hard work rather than pleasure.
6.Those who can't answer all three riddles will be c__________to death.
7.There is a growing t__________among people to drink too much coffee at work,which makes them very nervous.
8.We made no r_________on the kinds of films we show-as long as a film's quality meets our standards.
9.Toronto,the largest city in Canada,r___________among the most multicultural cities in the world.
10.They e___________themselves with a pair of sharp axes and set off for the forest.
