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Researchers are now using 3D printing to create models of the human heart to help heart specialists. The heart doctors can use the models to better help patients before an operation.
Dr. Bramlet, a children’s heart expert at the University of Illinois College of Medicine, says the 3-D models show information he cannot get any other way.
“And so what we’ve done with the printed models? We’ve pulled it out of the screen so that you can actually hold it in your hand and evaluate the anatomy（解剖）.”
A 3-D printer uses images from a digital display to create a physical model of a human heart. Matthew Bramlet says doctors can use the model to understand the anatomy.
Pictures from medical tests like CAT scan or MRI are sent to a 3-D printer to create a heart in a plaster（石膏）form. The printer then constructs the heart, thin layer by thin layer. Dr. Bramlet says the model matches the real heart in every detail. “When we’re done with the model and made our decision, we want to be able to go back to the source image and confirm those findings, he says.
Dr. Bramlet has built model hearts for different kinds of heart operations. All of the operations were successful. In his first case, digital images showed only one tiny hole in a baby’s heart. But, the 3-D printed model showed several defects or problems that the baby was born with. Dr. Bramlet says those defects could not be seen easily in the images. The heart surgeon was able to change the type of surgery for the patient based on the 3-D model. He added that 3-D heart models saves time during heart operations.
Kathy Magliato is a heart surgeon at Saint John’s Health Center in Los Angeles. She welcomes the new technology. She says it could help her make better decisions before she operates on the hearts of her patients.
“I can then take this very complicated structure before the operation and I can hold it in my hand and plan an operation around what I’m seeing, touching and feeling. That to me is what can potentially change the game in an operation and save lives.
Dr Bramlet continues to research the technology. He is working with the National Institutes of Health to build a 3-D library that includes heart models and images that others can use.
1.Whats the main idea of the passage?
A. The application of 3-D printing in heart operations
B. The development of 3-D technology.
C. The difficulties of heart operations.
D. Heart operations with the help 3-D models.
2.What is the biggest advantage of 3-D models in the diagnose of heart problems?
A. Surgeons can see, touch and feel the 3-D models.
B. They can help surgeons save time.
C. They can be made exactly like the hearts.
D. They can help discover the otherwise hidden heart problems.
3.Which of the following statements is TRUE?
A. The 3-D model can be taken out of a screen.
B. CAT scan and MRI are no longer needed.
C. The 3-D model is an exact copy of the heart.
D. Digital images are not reliable in heart operations.
4.What can we infer from the passage?
A. Digital images will mislead heart surgeons.
B. More patients will benefit from the 3-D technology.
C. Heart operations will never fail with 3-D models.
D. Surgeons cannot operate on hearts without 3-D models.
高三英语阅读理解中等难度题查看答案及解析
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Researchers are now using 3D printing to create models of the human heart to help heart specialists. The heart doctors can use the models to better help patients before an operation.
Dr. Bramlet, a children’s heart expert at the University of Illinois College of Medicine, says the 3-D models show information he cannot get any other way.
“And so what we’ve done with the printed models? We’ve pulled it out of the screen so that you can actually hold it in your hand and evaluate the anatomy（解剖）.”
A 3-D printer uses images from a digital display to create a physical model of a human heart. Matthew Bramlet says doctors can use the model to understand the anatomy.
Pictures from medical tests like CAT scan or MRI are sent to a 3-D printer to create a heart in a plaster（石膏）form. The printer then constructs the heart, thin layer by thin layer. Dr. Bramlet says the model matches the real heart in every detail. “When we’re done with the model and made our decision, we want to be able to go back to the source image and confirm those findings,” he says.
Dr. Bramlet has built model hearts for different kinds of heart operations. All of the operations were successful. In his first case, digital images showed only one tiny hole in a baby’s heart. But, the 3-D printed model showed several defects or problems that the baby was born with. Dr. Bramlet says those defects could not be seen easily in the images. The heart surgeon was able to change the type of surgery for the patient based on the 3-D model. He added that 3-D heart models saves time during heart operations.
Kathy Magliato is a heart surgeon at Saint John’s Health Center in Los Angeles. She welcomes the new technology. She says it could help her make better decisions before she operates on the hearts of her patients.
“I can then take this very complicated structure before the operation and I can hold it in my hand and plan an operation around what I’m seeing, touching and feeling. That to me is what can potentially change the game in an operation and save lives.”
Dr Bramlet continues to research the technology. He is working with the National Institutes of Health to build a 3-D library that includes heart models and images that others can use.
1.Whats the main idea of the passage?
A. The application of 3-D printing in heart operations
B. The development of 3-D technology.
C. The difficulties of heart operations.
D. Heart operations with the help 3-D models.
2.What is the biggest advantage of 3-D models in the diagnose of heart problems?
A. Surgeons can see, touch and feel the 3-D models.
B. They can help surgeons save time.
C. They can be made exactly like the hearts.
D. They can help discover the otherwise hidden heart problems.
3.Which of the following statements is TRUE?
A. The 3-D model can be taken out of a screen.
B. CAT scan and MRI are no longer needed.
C. The 3-D model is an exact copy of the heart.
D. Digital images are not reliable in heart operations.
4.What can we infer from the passage?
A. Digital images will mislead heart surgeons.
B. More patients will benefit from the 3-D technology.
C. Heart operations will never fail with 3-D models.
D. Surgeons cannot operate on hearts without 3-D models.
高三英语阅读理解中等难度题查看答案及解析
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3D printing is becoming more and more popular. We are now able to create things we need very quickly and easily using 3D printers. But can you imagine printing food?
Some scientists are trying to revolutionize the dining experience by doing this. They hope that having a 3D printer in the kitchen will be as common as the microwave oven or blender.
Scientists say that it’ll be quite easy: you simply have to select a recipe and put the raw food ‘inks’ into the printer. You can also modify the instructions to make the food exactly how you want it. This means that it would be very quick and easy to create tasty and nutritious meals.
Using 3D printers to create your meals would also be saving the environment. There would be less need for traditional growing, transporting and packaging processes as food production would be a lot more efficient. For example, alternative ingredients(原料) such as proteins from algae, beetroot leaves and insects could be converted into tasty products.
Printing food could also help people who suffer from dysphasia (a swallowing disorder). They could program the printer to print softer versions of their favorite foods so that they would not have trouble in swallowing them.
However, some people think that a future of 3D food printing would be a disaster. It could take away many jobs, including those fro growing, transporting and packaging food. Imagine a world where there was no need for farming or growing crops and the same tastes could be printed from a raw “food ink”. Likewise, traditional cafes and restaurants might lose business. Also, there are concerns about the nutritional value of printed food: is it really possible to be get the nutrients we need from food –based inks and gels(凝胶)?
What’s more , cooking and eating together with family and friends has long been a traditional and enjoyable activity. It is hard to imagine a world where the pleasure of cooking is dead and meals can be created at the touch of a button.
1.Which of the following best describes 3D food printing?
A. Quick and popular.
B. Easy and efficient.
C. Nutritious and tasty.
D. Soft and convenient.
2.Why do some think that 3D food printing would be a disaster?
A. Traditional food would disappear.
B. Many people could lose their jobs.
C. It would affect the people’s health.
D. We could all eat the same food.
3.What can we infer from the last paragraph?
A. 3D food printing will replace traditional cooking.
B. The future of 3D food printing is uncertain.
C. It would hurt our tradition of food culture.
D. 3D food printing would be a failure.
4.Which of the following can be the best title for the text?
A. 3D food “printing”: coming to the kitchen
B. Can 3D printing create everything?
C. 3D—printing food will be in fashion!
D. The disadvantage of 3D food printing
高三英语阅读理解困难题查看答案及解析
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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
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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
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In the 19th century, there used to be a model of how to be a good person. There are all these torrents of passion flowing through you. Your job, as captain of your soul, is to erect dams to keep these passions in check. Your job is to just say no to laziness, lust, greed, drug use and the other sins.
These days that model is out of fashion. You usually can’t change your behavior by simply resolving to do something. Knowing what to do is not the same as being able to do it. Your willpower is not like a dam that can block the torrent of self-indulgence. It's more like a muscle, which tires easily. Moreover, you're a social being. If everybody around you is overeating, you’ll probably do so, too.
The 19th-century character model was based on an understanding of free will. Today, we know that free will is bounded. People can change their lives, but ordering change is not simple because many things, even within ourselves, are beyond our direct control.
Much of our behavior, for example, is guided by unconscious habits. Researchers at Duke University calculated that more than 40 percent of the actions we take are governed by habit, not actual decisions. Researchers have also come to understand the structure of habits—cue, routine, reward.
You can change your own personal habits. If you leave running shorts on the floor at night, that'll be a cue to go running in the morning. Don’t try to ignore your afternoon snack craving. Every time you feel the cue for a snack, insert another routine. Take a walk.
Their research thus implies a different character model, which is supposed to manipulate the neural networks inside.
To be an effective person, under this model, yo
u are supposed to coolly examine your own unconscious habits, and the habits of those under your care. You are supposed to devise strategies to alter the cues and routines. Every relationship becomes slightly manipulative, including your relationship with yourself. You're trying to arouse certain responses by implanting certain cues.This is a bit disturbing, because the important habitual neural networks are not formed by mere routine, nor can they be reversed by clever cues. They are burned in by emotion and strengthened by strong yearnings, like the yearnings for admiration and righteousness.
If you think you can change your life in a clever way, the way an advertiser can get you to buy an air freshener, you’re probably wrong. As the Victorians understood, if you want to change your life, don’t just look for a clever cue. Commit to some larger global belief.
1.Which of the following is the first-to-none element in the 19th-century character model?
A. Action. B. Capacity. C. Resolution. D. Enthusiasm.
2.The research at Duke University indicated that ________
A. One’s behavior is tough to change.
B. Habit has an unidentified structure.
C. Habit plays a vital role in one's behavior.
D. Both habit and will power are of significance.
3.According to the new character model, personal behavior could be altered through
A. techniques to break old r
outines.B. techniques to provide different physical cues.
C. cues to change all the former unconscious habits.
D. cues to manipulate
the habitual neural responses.高三英语阅读理解中等难度题查看答案及解析
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Researchers are now conducting hibernation experiment and can use chemicals to put living cells into sleep-like state_____ they don’t age.
A. for which B. that C. where D. which
高三英语单项填空中等难度题查看答案及解析
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Oscar Valera likes to use 3D printers to build a collection of crafts (模型), but he is now turning his hobby toward the fight against the coronavirus pandemic (新冠大流行).
In just four days, the New Jersey high school teacher has printed and distributed 200 face masks to medical professionals across the country, including Florida and Texas. He is far from done. “One woman told me what you’re doing right now is giving people peace of mind. You’re probably saving lives,” said Valera, who found a mask design posted online.
Demand for face masks, along with N95-masks and other personal protective equipment (PPE) has increased with the surge (大量涌现) of patients infected with the highly infectious virus. That has prompted volunteer 3D printers like Valera to step in to support doctors, nurses and first responders, who are all in danger of contracting the sometimes deadly illness.
In Sunnyvale, California, community workspace nonprofit Maker Nexus has been running its 13 3D printers and three laser cutters (激光切割机) nonstop. The company produced 1,800 masks for local hospitals and now has requests for another 13,000.
Elsewhere in Silicon Valley, more companies are joining in. Fremont-based PrinterPrezz, a 3D-printing medical device contract manufacturer that specializes in metal spinal implants, switched production to printing PPE after getting a request from nearby Washington Hospital Healthcare System.
Snap Lab, a unit of Snap Inc, is also producing face masks to donate to hospitals. In New Jersey, Valera said he will continue to do his part. “I don’t mind doing this,” Valera said. “I just hate the fact that I have.”
1.What do we know about Oscar Valera?
A.He is a professional craftsman.
B.He is helping medical worker to save lives.
C.He adopts the online mask design.
D.He is forced to print face masks.
2.How many enterprises are mentioned to help produce medical equipment?
A.2. B.3. C.4. D.5.
3.What’s the tone of the author when reporting the news?
A.Concerned. B.Critical.
C.Objective. D.Enthusiastic.
4.What’s the best title of the passage?
A.A Teacher’s Creativity to Produce Masks.
B.3D Printers Help Make Face masks.
C.Face Masks Are in Great Demand.
D.The Fight Against the Pandemic.
高三英语阅读理解中等难度题查看答案及解析
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Now many 3D film directors tend to use state-of-the-art technology to ________the story ________, so that the films attract audience’s attention very much.
A. bring; to light B. get; across
C. bring; to life D. get; through
高三英语单项填空中等难度题查看答案及解析
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Printed circuit boards are vital components of modern electronics. However, once they have served their purpose, they are often burned or buried in landfills, polluting the air, soil and water. Most concerning are the flame retardants （阻燃剂）added to printed circuit boards to keep them from catching fire. Now, researchers reporting in ACS Sustainable Chemistry & Engineering have developed a ball-milling method to break down these potentially harmful compounds enabling safer disposal （处理）.
Composed of 30% metallic and 70% nonmetallic particles, printed circuit boards support and connect all of the electrical components of a device. Metallic components can be recovered from circuit boards easily using traditional methods leaving behind nonmetallic particles including those flame retardants and other additives. Scientists have found that compounds in those flame retardants can do harm to people's health, especially to those women who are pregnant. Therefore researchers have been wanting to develop a new method to remove the flame retardants from waste printed circuit boards so that they wouldn't do harm to people and the environment.
The researchers broke down printed circuit boards and removed the metallic components. Then，they put the nonmetallic particles into a ball mill — a rotating （旋转的）machine that uses hard stone balls to make materials into very small pieces. They also added iron powder, which prior studies had shown was helpful for removing chemicals from organic compounds. After ball-milling, the harmful chemicals on the surface of the particles had decreased by 50%・ The researchers determined that during the ball-milling process, iron transferred electrons to flame retardant compounds causing the internal structure to stretch and break.
The authors acknowledge funding from the 111 Project, the Natural Science Foundation of Guangdong Province, China and the Pearl River Star of Science and Technology.
1.People are concerned most about the flame retardants because
A.they are harmful and hard to remove B.they keep circuit boards from catching fire
C.they make up the largest part in electronics D.they are mixed up with other components
2.What is the function of the printed circuit board?
A.Making electronics small and light. B.Preventing electronics catching fire.
C.Connecting all electrical components, D.Allowing easy disposal after being used,
3.What does the author mainly intend to tell us in paragraph 3?
A.How to operate the ball milk B.The ball-milling process and its result.
C.The high efficiency of the new method. D.Why iron powder is added to the process.
4.What can we infer from the last paragraph?
A.The authors are short of money.
B.Over 100 projects support the authors,
C.The researchers will make much money.
D.The ball-milling method is promising.
高三英语阅读理解中等难度题查看答案及解析
u are supposed to coolly examine your own unconscious habits, and the habits of those under your care. You are supposed to devise strategies to alter the cues and routines. Every relationship becomes slightly manipulative, including your relationship with yourself. You're trying to arouse certain responses by implanting certain cues.