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.
高三英语阅读理解困难题
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.
高三英语阅读理解困难题查看答案及解析
Thailand has decided to begin building its first standard-gauge railways in cooperation with China, ______may cost $12.2 billion.
A. when B. that C. it D. which
高三英语单项填空中等难度题查看答案及解析
Walmart China has named Zhu Xiaojing Christina as president and CEO, effective May 8, its first female head in China. Current CEO Wern-Yuen Tan will leave the company after three years to return home to his family in Singapore. Zhu joins Walmart from Fonterra China, where she most recently served as president. The new appointment signals the US retailer's direction to be more digitalized and innovative in China's competitive retail（零售的）market.
"At a time of incredible disruption（扰乱）in retail landscape across China, it's vital to have a digital savvy, innovative leader to continue the remarkable work Yuen has done over the past few years heading up our business in China,” said Dirk Van den Berghe, Walmart's EVP, Global Sourcing and Regional CEO-Asia.
"Christina's impact on Fonterra's overall business —improving its brands and products as top sellers in many categories through digitization and constant innovation ——cannot be understated."
Before joining Fonterra in 2011, Zhu held various leadership roles in multinational companies such as Honeywell and McKinsey & Co.
Tan, who will leave the company on June 15, joined Walmart China in 2017. During his three years with Walmart China, Tan oversaw an expansion in formats and services across Walmart and Sam's Club China. Recently, Tan played a good role in Walmart China's response to the recent COVID-19 crisis.
Van den Berghe said： "From the moment we first learned of the novel coronavirus（冠状 病毒）threat, Yuen poured himself into the response effort, first ensuring the health and safety of our staff, then working with government officials to keep our retail units open so that customers could access essential goods and services. ” As our business in China found its way forward, Yuen went even further, compiling learning and best practices to share with the US business and across our international markets. The speed and effectiveness of Walmart's global response to the pandemic is a credit to Yuen's leadership.
Walmart said it was planning to open more than 500 new stores and depots （smaller warehouses） in China during the next five to seven years and improving 200 existing stores in three years.
1.What does the underlined word "savvy" mean in Para. 2?
A.Practical knowledge or understanding of sth.
B.A statement in which sb admits that sth is true.
C.The part of a person's character that consists of feelings
D.Something that you do or say to show a particular intention.
2.Which company did Zhu Xiaojing Christina work in before getting the new promotion?
A.Sam's Clubs China. B.Fonterra.
C.Honeywell. D.McKinsey & Co.
3.What does Van den Berghe mainly want to express in Para. 6?
A.Yuen s contribution to working to keep the retail units open.
B.Yuen s contribution to Walmart's global response to the pandemic.
C.Yuen s contribution to ensuring the health and safety of the staff.
D.Yuen s contribution to customers' accessing essential goods and services.
4.What can be the best title for the news report?
A.Walmart's direction to be more digitalized in China
B.Current CEO Wern-Yuen Tan will leave Walmart
C.Walmart expects to be more competitive in China's retail market
D.Walmart creates history by appointing female as China head
高三英语阅读理解中等难度题查看答案及解析
Li Qi works hard as usual and it has _______. He has got the first in The Voice of China.
A. showed up B. cut off
C. paid off D. put up
高三英语单项填空中等难度题查看答案及解析
阅读下面材料，在空白处填入适当的内容（1个单词）或括号内单词的正确形式。
China has recently published its first artificial intelligence （Al） textbook for high school students, following a plan1.（include） Al courses in primary and secondary schools by central government last year.
Under the joint efforts by the research center for MOOC at East China Normal University and Al startup Sense Time Group, the nine-chapter textbook,2. (name) Fundamentals of Artificial Intelligence, was written by outstanding scholars from well-known 3. (school) nationwide, Xinhua reported on Sunday.
It includes the history of Al and how the technology can 4.(apply) in areas such as facial recognition, auto driving and public security. “The textbook focuses not only on basics of Al, but also on 5.(practice) use of Al in daily life," said Chen Yukun, a professor at East China Normal University,6.is also a contributor to the book. So far, about 40 high schools across the country 7. (join) the first group of Al high education pilot program 8. introducing the textbook in curriculum.
“The Al sector is facing a talent shortage 9. . (global). The publication of the book is 10. breakthrough as it takes Al technology out of the ‘ivory tower' and makes it part of high school learning, said Lin Dahua, a professor at the Chinese University of Hong Kong.
高三英语语法填空中等难度题查看答案及解析
In a major medical breakthrough, Tel Aviv University researchers have “printed” the world's first 3D vascularized (有血管的）engineered heart using a patient’s own cells and biological materials. Their findings were published on April IS in a study in Advanced Science.
“This is the first time anyone anywhere has successfully engineered and printed an entire heart,” says Prof. Tal Dvir of Department of Materials Science and Engineering, who led the research for the study. “This heart is made from human cells and patient-specific biological materials. In our process, these materials serve as the bioinks, something made of sugars and proteins that can be used for 3D printing of complex tissue models，” Prof, Dvir says. “People managed to 3D print the structure of a heart in the past, but not with cells or with blood vessels (血管).Our results demonstrate the potential of our approach for engineering personalized tissue and organ replacement in the future.”
According to Prof. Dvir，the use of “ native ” patient-specific materials is important to successfully engineering tissues and organs.
The researchers are now planning on culturing the printed hearts in the lab and “ teaching them to behave” like hearts, Prof. Dvir says. They then plan to transplant the 3D-printed heart in animal models.
“We need to develop the printed heart further，” he concludes. “The cells need to form a pumping ability ； they can currently contract (收缩），but we need them to work together. Our hope is that we will succeed and prove our method’s efficacy (功效)and usefulness. “Maybe, in ten years, there will be organ printers in the finest hospitals around the world，and these procedures will be conducted routinely. ”
1.What does Prof. Dvir think of an early 3D-printed heart?
A.It was highly practical. B.It was too expensive.
C.It was personalized. D.It was too simple.
2.What do we know about the latest 3D-printed heart?
A.It can be cultured in the lab.
B.It can match a patient perfectly.
C.It has been transplanted in animals.
D.It has been widely used in hospitals,
3.What is Prof, Dvir's attitude to the development of the printed heart?
A.Ambiguous. B.Positive.
C.Disapproving. D.Cautious.
4.What is the author's purpose in writing the text?
A.To explain the basic principle of 3D technology.
B.To introduce a breakthrough of medical research.
C.To doubt the medical value of a new invention.
D.To prove the effectiveness of the new technology.
高三英语阅读理解困难题查看答案及解析
The Shanghai Expo has had a major impact upon China. It is the first World Expo _________ in a developing country in the event’s 159-year history.
| A．having been held | B．to hold | C．being held | D．to be held |
高三英语单项填空中等难度题查看答案及解析
Look, this is the first plane in the world to be created using the new technology of “3D printing”. The airplane was built using only a computer—but it can fly at a speed of 100mph and has a two-meter wingspan.
It was produced using a special nylon laser printer that builds up something layer-by-layer. The parts were made separately and attached using a “snap fit” technique so the aircraft could be put together without tools in minutes.
No fasteners at all were used in the manufacture of the plane. Unmanned and electrically powered, the plane can travel in near silence and is also equipped with a small autopilot system. The special production process used is known as “laser sintering (激光烧结)”and allows the designers to create shapes and structures that would normally include costly manufacturing techniques. This technology allows a highly-tailored aircraft to be developed from your own design to first flight in days, while using traditional materials and techniques would take months. And because no tooling is required for manufacture, major changes to the shape and scale of the aircraft can be made with no extra cost.
Professor Jim Scanlon, who led the team, said, “The process allows the design team to revisit historical techniques and ideas that would have been too expensive using traditional manufacturing.” He added, “This form of structure is very firm and lightweight, but very complex. If it was manufactured traditionally it would require a large number of individually tailored parts that would have to be connected or fastened at great expense.”
The new printed plane is known as the Southampton University Laser Sintered Aircraft—or SULSA for short—and is part of a wider project using cutting-edge manufacturing techniques. The University of Southampton has been at the leading position of Unmanned Aerial Vehicle development since the early 1990s.
1.Which of the following would be the best title for the text?
A. Revolutionary Breakthrough of 3D Printer
Scientists Create Aircraft with High Speed
C. New Designed Airplane with New Techniques.
D. The World’s first 3-D printed Airplane, SULSA
2.How could the plane work while flying?
A. It should be controlled by an autopilot system.
B. It should be controlled by “laser sintering”.
C. A pilot controls it using a remote control.
D. A pilot with high techniques controlled it.
3.This kind of plane has the following advantages EXCEPT ______.
A. it produces little noise while flying
B. it is manufactured in quite a short time
C. it only requires simple and cheap tools
D. it needn’t extra cost if changes are made
4.Professor Jim Scanlon believes they can _____ with their techniques.
A.produce firmer and lighter real planes easily
B.connect and fasten tailor parts for real planes
C.copy earlier planes to study their techniques
D.find differences by studying the traditional ones
高三英语阅读理解中等难度题查看答案及解析
Look, this is the first plane in the world to be created using the new technology of “3D printing”. The airplane was built using only a computer-but it can fly at a speed of 100mph and has a two-meter wingspan.
It was produced using a special nylon laser printer that builds up something layer-by-layer. The parts were made separately and attached using a “snap fit”（搭扣） technique so the aircraft could be put together without tools in minutes.
No fasteners(扣件) at all were used in the manufacture of the plane. Unmanned and electrically powered, the plane can travel in near silence and is also equipped with a small autopilot system. The special production process used is known as “laser sintering(激光烧结) “and allows the designers to create shapes and structures that would normally include costly manufacturing techniques. This technology allows a highly-tailored aircraft to be developed from your own design to first flight in days, while using traditional materials and techniques would take months. And because no tooling is required for manufacture, major changes to the shape and scale of the aircraft can be made with no extra cost.
Professor Jim Scanlon, who led the team, said, “The process allows the design team to revisit historical techniques and ideas that would have been too expensive using traditional manufacturing.” He added, “This form of structure is very firm and lightweight, but very complex. If it was manufactured traditionally it would require a large number of individually tailored parts that would have to be connected or fastened at great expense.”
The new printed plane is known as the Southampton University Laser Sintered Aircraft-or SULSA for short-and is part of a wider project using cutting-edge manufacturing techniques. The University of Southampton has been at the leading position of Unmanned Aerial Vehicle development since the early 1990s.
1. What does the passage maily talk about?
A. New Designed Airplane with New Techniques.
B. Scientists Create Aircraft with High Speed.
C. Revolut ionary Breakthrough of 3D Printer.
D. The World’s first 3-D printed Airplane, SULSA.
2. How does the 3-D printed plane fly?
A. A pilot controls it using a remote control.
B. It should be controlled by “laser sintering”.
C. It should be controlled by an autopilot system.
D. A pilot with high techniques controlled it.
3. Which of the following is NOT advantage of the plane?
A. It only requires simple and cheap tools.
B. It is manufactured in quite a short time.
C. It produces little noise while flying.
D. It needn’t extra cost if changes are made.
4. Accoding to Professor Jim Scanlon, plane manufacturers can
with their techniques.
A. copy earlier planes to study their techniques
B. connect and fasten tailor parts for real planes
C. produce firmer and lighter real planes
D. find differences by studying the traditional ones
高三英语阅读理解中等难度题查看答案及解析
Dutch officials toasted on Tuesday the opening of what is being called the world’s first 3D-printed concrete bridge, which is meant to be used by cyclists. There was applause as officials wearing hard hats and workmen’s jackets rode over the bridge on their bikes at the opening ceremony in the southeastern town of Gemert.
“The bridge is not very big, but it was rolled out by a printer which makes it unique,” Theo Salet, from the Eindhoven University of Technology, told Dutch broadcaster NOS. Work on printing the bridge, which has some 800 layers, took about three months after starting in June and it is made of pre-stressed concrete, according to the university. “One of the advantages of printing a bridge is that much less concrete is needed than in the conventional technique in which a mould (泥浆) is filled,” it said on its website, adding “a printer deposits the concrete only where it is needed.”
The eight-metre (26-foot) bridge crosses a water-filled channel to connect two roads, and it was tested for safety to bear loads of up to two metric tons in cooperation with the BAM Infra Construction company. Although designed for bikes, it could take up to 40 trucks, the designers said “We are looking to the future,” said the head of BAM, Marinus Schimmel. “3D printing meant fewer rare resources were needed and there was significantly less waste,” he added.
The Netherlands is among countries, with the United States and China, taking a lead in the cutting-edge technology of 3D printing, using computers and robotics to construct objects and structures from scratch without using much traditional manpower. Last year a Dutch architect unveiled (提示) a unique 3D printer with which he hopes to construct an “endless loop” building. And a Dutch start-up called MX3D has begun printing a stainless-steel bridge, of which a third is already completed. The aim is to finish printing by March and lay the bridge over an Amsterdam canal in the future.
1.According to the text what makes the bridge unique?
A. It adopts 3D printing
B. It opens only to cyclists.
C. It is made of new material.
D. It uses much less concrete.
2.According to Marinus Schimmel. the bridge ________.
A. fails to bear heavy loads more safely
B. needs no concrete and mould
C. is designed for bikes and trucks
D. is cost-efficient and eco-friendly
3.According to the last paragraph, which of the following statement is true?
A. The 3D-printed bridges are all designed for bikes.
B. 3D-printed construction saves much human labor.
C. United States and China develop slowly in 3D printing.
D. The stainless-steel bridge by MX3D has been put into use.
4.What is the best title for the text?
A. The Value of the 3D Printing Technology
B. The Netherlands Leads the Way in 3D Printing
C. World’s First 3D-printed Bridge Opens to Cyclists
D. 3D Printing is Widely Used in Building Bridges
高三英语阅读理解中等难度题查看答案及解析