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 heavy lift 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.
China has once again proved its (able) to change the world with the "new four great inventions": high-speed railways, electronic payments, shared bicycles and online shopping. They're related to China's high-tech innovation (创新), has improved the quality of people's lives, according to a survey (make) by the Belt and Road Research Institute of Beijing Foreign Studies University.
"My wallet is no longer in use. I can buy and eat whatever I want simply with a fingertip on my phone," said university student, adding that "even pancake sellers are using mobile payment".
The bikes (them) are not new, but the operating model of bike-sharing (base) on satellite navigation system, mobile payment, big data and other high technologies.
China has entered a new innovative era, thanks to the large amounts of capital China has invested in (encourage) innovation, said Bernhard Schwartlander, WHO Representative in China.
It is increasingly clear that China is innovating and no longer copying Western ideas. This is especially true in mobile, where China is leading many ways such as…social messaging app WeChat, she said. This is partly China skipped over the PC era and went directly to mobile. China has a (large) mobile use than any other country in the world.
增加:在缺词处加一个漏字符号(^),并在其下面写出该加的词。
删除:把多余的词用斜线(\)划掉。
修改:在错的词下划一横线,并在该词下面写出修改后的词。
注意:①每处错误及其修改均仅限一词;
②只允许修改10处,多者(从第11处起)不计分。
Dear Sophie,
I am chairman of the Students, Union of this school, deciding to prepare an English program to be holding in our school. There are some things we should do on advance. The first one is to choose student who perform well. The second one is that we should plan the program proper. The last one is your assist for us after your arrival, with which we were sure to perform better.
I sincerely invite you join us to play a role and help us correct the script (剧本) as well as. With only twenty days leaving for the program, I hope he can give us timely help.
Yours,
Li Hua
Learning, Fast and Deep
Over the past five years researchers in artificial intelligence have become the rock stars of the technology world. A branch of AI known as deep learning, which uses neural(神经的) networks to scan through large volumes of data looking for patterns, has proven so useful that skilled practitioners can command high six-figure salaries to build software for Amazon, Apple, Facebook and Google.
The standard route into these jobs has been a PhD in computer science from one of America's top universities. Earning one takes years and requires a personality suited to academia, which is rare among more normal folk.
That is changing.
Last month fast.ai, a non-profit education organization based in San Francisco, kicked off the third year of its course in deep learning. Since its foundation it has attracted more than 100, 000 students around the globe from India to Nigeria. The course and others like it, come with a simple idea: there is no need to spend years obtaining a PhD in order to practise deep learning. Creating software that learns can be taught as a craft, not as a high intellectual pursuit to be undertaken only in an ivory tower. Fast. ai's course can be completed in just seven weeks.
To make it accessible to anyone who wants to learn how to build AI software is the aim of Jeremy Howard, who founded fast.ai with Rachel Thomas, a mathematician. He says school mathematics is sufficient. "No. Greek. Letters," Mr. Howard intones, pounding the table with his fist for punctuation.
Some experts worry that this will serve only to create a flood of unreliable AI systems which will be useless at best and dangerous at worst. In the earliest days of the Internet, only a select few nerds, namely computer holies with specific skills, could build applications. Not many people used them. Then the invention of the World Wide Web led to an explosion of web pages, both good and bad. But it was only by opening up to all that the Internet gave birth to online shopping, instant global communications and search. If Mr. Howard and others have their way, making the development of AI software easier will bring forth a new crop of fruit of a different kind.
增加:在缺词处加一个漏字符号(A),并在其下面写出该加的词。
删除:把多余的词用斜线(\)划掉。
修改:在错的词下划一横线,并在该词下面写出修改后的词。
注意:1)每处错误及其修改均仅限一词;
2)只允许修改10处,多者(从第11处起)不计分。
Health is most important for any of us. In order to stay health, we need to know some common knowledge.
Firstly, we should eat lots of fruit and vegetable because they are rich in fiber and low in fat. When a proverb says, "An apple a day keeps the doctor away." Secondly, exercise is necessary. Regular exercise can keep ourselves from getting fat. People do running every day usually have strongest hearts than those who don't. Final, form good living habits. We should sleep for about 8 hours every day. Overwork and little sleep will lead to ill. What's more, stay away cigarettes.
These are the things we should pay an attention to so as to keep fit.
TikTok, which has taken foreign countries by storm in the past three years, is working its magic China, too. It is (especial) popular with teens and young adults. In the annual report of its parent company ByteDance this week, the domestic version of TikTok, (call) Douyin, has accumulated 400 million daily active users. The service lets users create, edit and share short videos, many of which are under 15 seconds. It is a great way to spend the leisure time (enjoy) these funny videos.
—I can imagine. _________.
She told me that ______ was needed at that time was some good luck.( )
A.it B.what C.this D.as
单词拼写
66. He has told me his plans and he's made a good (印象) on me.
67.I will not allow you to leave unless you make an (道歉) to what you have done.
68. His parents (分手)when he still a baby.
69. Children, when (陪伴) by their parents, are allowed to enter the stadium.
70. Leave the battery on (充电) all night.
71. When I (定居) in Chicago, my new city seemed so big and unfriendly.
72. They have changed the (外貌/观) of the whole building.
73. You can learn interesting words and (词语) by reading poems.
74.She is very (敏感的) to criticism.
75. He usually puts the (责备) on others.
76. Don't underestimate the power of the human (精神) to overcome difficulties.
77.The thunder was so loud that he_____ (埋藏) his head in his hands.
78. The letter wasn't addressed to me but i opened it out of (好奇).
79. The limited edition watch is (值..的) about 5000 dollars .
80. Hobbies, like reading and dancing can bring____ (安慰/慰籍) during times of stress
With the help of the new equipment, our factories produced ___ VCD players in 2000 as the year before.
A. as many as twice B. twice more than
C. as twice many D. twice as many
完成句子
根据提示完成下列句子。
注意:1. 每空一词。
2. 填错任何一个词(包括词的形式)便失去句子的本意,所以此题不给分。
96.______ ______ ______ ______(曾经有一段时间)when a deep blue sky,the song of the birds,moonlight and flowers could never have kept me spellbound.
97.As we know,there is______ ______ ______ ______(不止一个男孩) in our class coming from the other cites in our province.
98.With a compass you’ll always know you are going ______ ______ ______ ______(朝正确的方向).
99.But the one million people of the city,who thought little of the events,______ ______ ______ ______ (和往常一样熟睡)that night.
100.______ ______ ______ ______ ______(只是那时我们决定)to answer violence with violence.
101.______ ______ ______ ______ ______(能够证明)China has more people than any other country in the world.
102.The design of the amber room was ______ ______ ______ ______(以一种奇特的风格),popular in those days.
103.No other countries could join in the ancient Olympic Games,______ ______ ______(奴隶也不能)or women.
104.______ ______ ______ ______(在。。。的帮助下)my electronic brain which never forgets anything,using my intelligence is what I am all about.
105.She is one of the women who______ ______ ______ ______(掌管;负责)the computer company.
Debbie, who lives in Hong Kong, was on holiday in Beijing with her best friend Lily. Lily is a beautiful girl who is studying science at university. She also models 61 her spare time. Debbie is studying history and wants to be a writer. Lily and Debbie were very 62 (excite)to be in Beijing because there was so much to see. Lily suggested 63 (visit) the Great
Wall first, so they went on a tour to see it the first day. Their tour guide was a young man with 64 (glass) who was very 65 一(knowledge). He told them many interesting stories. The next day,they took a bus from their hotel and then,using a map,they walked around some old hutongs. Both of the girls thought that it gave them a good idea of 66 life was like in the 13th century, Debbie was 67 (especial) excited as she 68 (study) hutongs earlier in
the year. 69 was the Forbidden City that was next on 70 (they) agenda and the girls loved every minute of the tour around the beautiful grounds. Because they were leaving the next day,when they finished the tour,they went shopping and splashed out on an expensive meal.
King Midas used to love gold. One day he met a fairy who allowed him to make a wish for something. The king replied at once, ‘‘I love gold. I want everything I touch to change into gold”. ‘‘Very well, tomorrow morning, everything you touch will turn into gold.” Saying this, the fairy disappeared.
The king waited excitedly till the next morning. To his joy, everything he touched changed immediately into gold. ‘‘I’m the richest man in the world now.” He shouted.
Soon Midas became hungry. He sat down at his table. All the foods and drinks turned into gold in his hand. ‘‘I’m dying of hunger.” He cried.
Just then his daughter came running in. ‘‘Why are you so sad, dad?” she asked, putting her arms around him. There and then she became a golden statue. The king loved his daughter very much .Seeing this, he began to cry. He looked up and suddenly saw the fairy before him. ‘‘Don’t you like the golden touch?” asked the fairy. ‘‘Please take it away,” begged the king, ‘‘give me back my daughter.”‘‘Well, you have learned your lesson. Go and wash in the river. Then the golden touch will be gone.”
The king ran quickly to the nearby river.
51. The fairy allowed the king to make a wish because_____
A. She hoped to make the king the richest in the world.
B. She loved gold too.
C. She wanted to teach the king a lesson.
D. She wanted to turn the king’s daughter into gold.
52. When the foods and drinks turned into gold the king was _____
A. excited B. hungry C. worried D happy
53. The king’s daughter became a golden statue when _____
A. she saw her father
B. the king went to meet her
C. she put her arms around her father
D. the king loved her very much
54. Which of the following might have happened afterwards?
A. The king died in the river.
B. The king’s daughter changed back from gold to a lovely girl.
C. All the things the king had touched changed back into real ones.
D. Both B and C
55. What do you think the story tries to tell us?
A. Gold makes people unhappy.
B. More gold, more happiness.
C. Gold is not the thing that makes life happy.
D. People feel happy if they have not gold.
The most important lesson I learned in high school had nothing to do with math or American history. It came at graduation, several minutes 41 I left Miramonte High School.
I was rather shy back then, happy to focus on my 42 . I was doing so well that by the end of senior year I had perfect 43 and enough credits(学分)to go to college.
But my good record soon became a 44 to my well-being(幸福). In early June of senior year, the headmaster 45 me into his office. He asked me to give a leave-taking speech at graduation. I looked at him, my heart 46 fast. I said something and hurried away.
I was 47 about the decision, finally agreeing to compromise(妥协). I wasn’t the only speaker — I would 48 the honor with five other students. Still, it was doubtful whether the task was 49 me. How in the world would I give a speech to hundreds of people?
Graduation day soon arrived and, as expected, I was nervous. I’d been practicing my speech for days, and I had it 50 . But I had never been so 51 in my life. The first half hour passed, and then my 52 came. My name was announced. I 53 to reach the platform without falling down. But within minutes, I finished my speech, 54 back to my seat, and feeling unsatisfied with my performance.
Now I still have the 55 of that speech. My voice trembled a little, but 56 it was clear and strong. I’m proud of that tape. I achieved 57 I’d never dreamed. 58 I didn’t realize it then, the successful completion of that speech gave me the confidence to give oral reports at college and to finally break free of my 59 .
I’m glad I gave a speech at graduation. I know it may well turn 60 to be one of my shining moments.
41. A. before B. after C. during D. towards
42. A. characters B. interests C. games D. subjects
43. A. money B. scores C. time D. standards
44. A. luck B. benefit C. fear D. solution
45. A. was called B. calling C. called D. to call
46. A. burning B. breaking C. aching D. beating
47. A. doubtful B. optimistic C. generous D. unsure
48. A. share B. bring C. spare D. give
49. A. about B. for C. upon D. beyond
50. A. thrown B. printed C. memorized D. completed
51. A. interested B. terrified C. excited D. disappointed
52. A. moment B. job C. chance D. decision
53. A. rushed B. jumped C. managed D. wanted
54. A. passing B. handing C. heading D. returning
55. A. picture B. tape C. paper D. word
56. A. partly B. immediately C. honestly D. mostly
57. A. something B. anything C. nothing D. everything
58. A. Because B. When C. Although D. Unless
59. A. shyness B. pride C. stupidity D. courage
60. A. off B. about C. out D. back
Due to the increasing number of violence acts produced in schools all over the world, more and more parents prefer to have their children educated at home rather than at school. This way they can ensure their safety and well-being, although teachers and school representatives are trying to improve the situation in schools by increasing the number of the persons in charge of the safety of the students.
The main reason for violence acts are the films and cartoons that fill the children's time. They want to do everything they watch on TV and never think of the consequences, and they may hurt a classmate or a teacher.
On the other hand, parents are not fully satisfied with the children's results obtained in classes and they consider private classes would have better results.
When a teacher has to watch 30 students in class he can't probably see what each of them is doing, how he is writing, or if he understands the explanations.At home the teacher can explain in details everything the child doesn't understand as many times as he considers proper.
And many times the child grows fond of the teacher at home, who becomes his best friend, and who helps him whenever he needs someone to talk to.
However, the best solution would be a mixture between the education received at school and that at home, because school makes children communicate and socialize.Keeping a child at home for fear there might happen something bad to him only makes the child's character weak and prevents him from knowing what real life is.Staying in a crystal ball only does harm to the child.
All in all, schools have been created to help children, not to harm them, so it's best to keep children in these special places, where they learn, laugh, have fun and make new friends.
21. The writer's purpose in writing the text is to________________.
A. teach parents the ways to keep their children safe
B. show solutions to developing children's character
C. analyze an education problem and give opinions
D. explain the main reason for violence acts in schools
22. Which of the following might be the best title of the passage?
A. Advantages and Disadvantages of Private Classes
B. Who is to Blame, Parents or Schools?
C. Which Is Better, School Study or Home Study?
D. The Relationship between Teachers and Children
23. What does "a crystal ball" in the passage refer to?
A. A toy that can be used for entertainment.
B. A safe and comfortable environment.
C. A round object that is made of crystal.
D. An obstacle that is hard to overcome.
24. We call infer from the passage that___________________________________.
A. violence TV programs have bad effects on children's behavior
B. the teacher at home is more patient than the teacher at school
C. children today are weak from lack of sense of right and wrong
D. there are too many students in class for a teacher to teach