Oscar Valera likes to use 3D printers to buil...

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

请阅读下列应用文及其相关信息，并按照要求匹配信息。

1.

Mary: I never used to like stamp collecting. I read almost everything I can: books, magazines,newspapers. I go to the public library abut twice a week. If you’d like to send me something,maybe books are my favorite.

2.

Tom: My wife says I should take up gardening. We have a big garden and she loves working in it.  But the truth is, it bores me. My friends and my wife think I’m really boring, because I’m always  listening to music. I go to concerts all the time. I love Mozart and all that classical staff.

3.

Mike: I don’t really like video games and that sort of things. I prefer being outdoors, hiking or playing sports. I always go out with my family playing baseball and stuff all the time. I think most   sports are pretty interesting.

4.

Lisa: I’m a free writer, and a lot of people think my job is easier because I don’t have to go to the office every day. And I don’t have to deal with office politics. But, you know, my job is very hard.I have to be very organized and much disciplined. And pretty self-motivated. And when I have a problem, there is no one around to help me.

5.

Victor: My life is very stressful. In my working place, everyone is in a hurry and under tremendous pressure. The doctors are demanding, and there is always too much to do to save a dying patient.

A.The person works in a hospital emergency room. His/her job is to assist doctors to rescue patients    who are seriously ill.

B.The person likes sports activities the most. For him/her, having sports activities is very   interesting.

C.The person works for himself/herself at home. He/She writes for others.

D.The person doesn’t like other things such as gardening. But he/she really likes music, especially classical music.

E.The person likes collecting all kinds of things, such as baseball cards and stamps.

F.Many people may like collecting things, such as collecting cards or stamps. But he/she likes reading very much.

高三英语信息匹配中等难度题查看答案及解析

________ like wood or stone, can be used to build houses.

A. Materials　　 B. Methods

C. Matters　　 D. Metals

高三英语单项填空中等难度题查看答案及解析

My printer is five years old, so I'd like to ______ it and purchase a new one online.

A.delete B.retire C.refresh D.declare

高三英语单项填空中等难度题查看答案及解析

He had collected plenty of historical evidence, ________ proved that humans used to have different sleeping patterns.

A．that              B．which            C．it                D．what

高三英语单项填空中等难度题查看答案及解析

Supporters of underground development say that building down ______ building up is a good way to use the earth’s space.

A. as well as　　　　　　 B. other than

C. rather than　　　　　　 D. more than

高三英语单项填空中等难度题查看答案及解析

7. Our older generation used to advise us not to build ____ in the air, but that’s not realistic at all.

高三英语单项填空简单题查看答案及解析

Skyscrapers are the symbol of Urban life.City people are used to seeing tall buildings and apartments. Farms，on the other hand,are associated with rural(农村的)life.However，there are experts who think skyscrapers should become farms to meet the increasing food needs.

By the middle of this century, some scientists suggest，almost 80% of the earth's population could live in cities. In addition，the population could increase to 9.1 billion people during that time yet the amount of　 land available for farming will be the same.If current farming practices don't change，we will need an area of new land to produce enough food for the planet.

Vertical farms, where urban farmers could grow crops in environmentally friendly skyscrapers, could be the solution. In spite of concerns over high costs, experts want to make it a reality and use these skyscrapers to grow crops.

Vertical farms would have many advantages, supporters say. Unlike traditional farming, vertical farming could be free of chemicals and diseases. Besides, crops would not suffer from problems like flooding. Finally，vertical farms would reduce the cost and negative effects of transporting food over long distances.

Some argue that although crops growing in a tall glass building would get natural sunlight during the day，it wouldn't be enough. For this reason，vertical farms would need additional light sources(来源), such as artificial light.

Another way of growing fresh food is to build urban farms on rooftops. This more practical approach may be more achievable than the idea of farms in skyscrapers, researchers suggest. Experts agree that innovative(革新的)farming practices are needed to support the need for more food at affordable costs, both to the farmer and to the consumer,but the best ideas could be yet to come.

1.What primary problem could vertical farming settle？

A. Poor state of rural life.

B. Shortage of food supply.

C. High cost for transporting crops.

D. Environmental pollution by transitional farmings

2.What is the advantage of vertical farming?

A. It can produce organic food.

B. It requires little care.

C. It can benefit transport industry.

D. It needs very low cost.

3.What is a big challenge to make vertical farming a reality?

A. Farmable land. B. Crop diseases

C. Light sources. D. Climate conditions.

4.What can be the best title of the test?

A. Future Food Needs

B. Symbol of Urban Life

C. Farming on Rooftops

D. Farms of the Future

高三英语阅读理解简单题查看答案及解析

Easy Ways to Build Vocabulary

It's not all that hard to build an advanced and large vocabulary. Like many things in life, it's 1.ongoing process, and the best part of the process is that there's enough room for improvement, 2.means you'll just keep getting better and better. Of course you have to work at it. You wouldn't think that a few 3.(month) of exercise in your teens would be enough 4. the rest of your life, and that's also true for building your vocabulary--you have to keep at it daily, and pretty soon you will find that you have an excellent vocabulary.

One of the 5.(effect) ways to build vocabulary is to read good books. You need to 6.(real) read at least one good book a week, preferably a classic. This isn't as hard as it 7.(sound), and it is far better than any other method because you improve your vocabulary while 8.(read) an interesting piece of literature. Another nice thing is that you learn both new words and 9.(they) use unconsciously, meaning that you will tend to use the words 10.(learn) this way in conversations almost automatically.

高三英语完形填空中等难度题查看答案及解析

Easy Ways to Build Vocabulary

It’s not all that hard to build an advanced and large vocabulary. Like many things in life, it’s1.ongoing process, and the best part of the process is that there’s enough room for improvement, 2.means you’ll just keep getting better and better. Of course you have to work at it. You wouldn’t think that a few 3. (month) of exercise in your teens would be enough 4.the rest of your life, and that’s also true for building your vocabulary----you have to keep at it daily, and pretty soon you will find that you have an excellent vocabulary.

One of the5. (effect) ways to build vocabulary is to read good books. You need to 6.(real)read at least one good book a week, preferably a classic. This isn’t as hard as it7.(sound), and it is far better than any other method because you improve your vocabulary while8.(read) an interesting piece of literature. Another nice thing is that you learn both new words and 9.(they)use unconsciously, meaning that you will tend to use the words10.(learn)this way in conversations almost automatically.

高三英语短文填空中等难度题查看答案及解析