COVID-19(新冠病毒) is a threat to the very people fighting it-nurses, doctors, and other first responders, who are exposed to infected patients. Now, a team has developed two devices(设备) that could reduce their risks by sucking away infectious bacteria: a helmet to be worn by a patient,and a small tent in which a patient could be protected. The inventors hope they'll reduce the deaths among healthcare workers.
Negative-pressure rooms have been used in hospitals since the 1980s to keep airborne bacteria from spreading.But Nathan Haas says such rooms cost about$12,000. He and his colleagues wanted to develop a cheaper way to create a negative pressure environment for patients.The new devices could lower the need for negative-pressure rooms,which are rare in many parts of the world,according to Haas.
The helmet can be used when staff transport patients and the tent can protect the upper body of a bed-bound patient wearing a mask,allowing staff to perform several procedures.
“They represent a really simple solution to potentially helping reduce virus spread and increase the safety of healthcare workers, as well as patient safety,” says Ben Bassin.
When the researchers tested their devices with a healthy volunteer,they saw 97% to 99%fewer bacteria outside the devices than inside.They also tested the devices' ease of use and comfort with seven COVID-19 patients.The response from patients and staff was good, Bassin says.
But Reuben Strayer notes the tests did not prove that these devices work to protect medical staff in real-life situations. He says he wants to see independent effect, “to see if they perform as they are advertised.”
1.The following statements are true EXCEPT
A.The devices are not complicated to use
B.People have already used the devices widely
C.The effect of the devices remains to be seen
D.Negative-pressure rooms are not common because of the high cost
2.What will most probably be discussed in the following paragraph?
A.The advantages of the devices. B.Different appearances of the devices.
C.Measures to put the devices into practice. D.The reasons for inventing the devices.
3.What is the author's purpose in writing the text?
A.To inform readers of the devices. B.To praise the efforts of the researchers.
C.To stress the importance of the devices. D.To encourage people to buy the devices.
高二英语阅读选择中等难度题
COVID-19(新冠病毒) is a threat to the very people fighting it-nurses, doctors, and other first responders, who are exposed to infected patients. Now, a team has developed two devices(设备) that could reduce their risks by sucking away infectious bacteria: a helmet to be worn by a patient,and a small tent in which a patient could be protected. The inventors hope they'll reduce the deaths among healthcare workers.
Negative-pressure rooms have been used in hospitals since the 1980s to keep airborne bacteria from spreading.But Nathan Haas says such rooms cost about$12,000. He and his colleagues wanted to develop a cheaper way to create a negative pressure environment for patients.The new devices could lower the need for negative-pressure rooms,which are rare in many parts of the world,according to Haas.
The helmet can be used when staff transport patients and the tent can protect the upper body of a bed-bound patient wearing a mask,allowing staff to perform several procedures.
“They represent a really simple solution to potentially helping reduce virus spread and increase the safety of healthcare workers, as well as patient safety,” says Ben Bassin.
When the researchers tested their devices with a healthy volunteer,they saw 97% to 99%fewer bacteria outside the devices than inside.They also tested the devices' ease of use and comfort with seven COVID-19 patients.The response from patients and staff was good, Bassin says.
But Reuben Strayer notes the tests did not prove that these devices work to protect medical staff in real-life situations. He says he wants to see independent effect, “to see if they perform as they are advertised.”
1.The following statements are true EXCEPT
A.The devices are not complicated to use
B.People have already used the devices widely
C.The effect of the devices remains to be seen
D.Negative-pressure rooms are not common because of the high cost
2.What will most probably be discussed in the following paragraph?
A.The advantages of the devices. B.Different appearances of the devices.
C.Measures to put the devices into practice. D.The reasons for inventing the devices.
3.What is the author's purpose in writing the text?
A.To inform readers of the devices. B.To praise the efforts of the researchers.
C.To stress the importance of the devices. D.To encourage people to buy the devices.
高二英语阅读选择中等难度题查看答案及解析
The secret of successful response
The novel coronavirus(新冠状病毒)is an uncommon threat. We don't know how bad it will be, nor do we know for how long it will spread. But we do know that it has already infected (感染) more than 18,000 people and killed many around the world. It also caused serious global economic damage. We need to adapt our responses to different countries and different parts of the same country in order to limit damage. Using data well is essential to such a successful response.
Data is key to all successful public health programs. In New York City, we raised tobacco taxes and made all indoor public places smoke free. Smoking rates declined at first but then the decline stopped. Because we had a tracking system in place, we realised that progress had stopped. So, we produced strong and direct no tobacco ads to the public. Our programs quickly reduced adult and teenager smoking, preventing more than 10,0000 deaths.
Every country facing the coronavirus disease needs to strengthen their data systems to track diseases, investigate skillfully and respond fast and successfully. Fast action will save lives and save money. But building the capacity to do this isn't free. It will cost about $1 to $2 per person per year for at least 10 years --- at least 30 billion. That's a lot of money for public health, but it's a tiny part of the amount lost when we don't know what we need to know about health threats.
Getting he data right is hardly quick and never easy, but it is always very important if we want to respond successfully, limit spread, and protect our communities and economy.
1.Which of the following statements is NOT true according to the passage?
A.Novel coronavirus has killed people and damaged economy.
B.New York City succeeded in reducing smoking with data.
C.We need a lot of money to build the capacity of fast action.
D.Using data will cure people infected with novel coronavirus,
2.Why does the author talk about smoking in paragraph 2?
A.To warn us that smoking is harmful.
B.To suggest us how to reduce smoking.
C.To show the significant role of data.
D.To protect people's physical health.
3.What is the author's opinion on the building of the capacity of fast response?
A.It is too expensive and many countries cannot afford it.
B.It is worthwhile and necessary to develop such a capacity.
C.It supports communities and saves lives and saves money.
D.It requires a tiny part of the amount lost by heath threats.
4.What is the main idea of this passage?
A.The widespread of novel coronavirus has killed many people.
B.Using Data well is of vital importance to public health programs.
C.The importance of fighting against novel coronavirus.
D.The importance of raising tobacco taxes.
高二英语阅读选择中等难度题查看答案及解析
Bill Gates on how to fight future pandemics
WHEN HISTORIANS write the book on the covid-19 pandemic, what we've lived through so far will probably take up only the first third or so.The bulk of the story will be what happens next.
I believe that humanity will beat this pandemic, but only when most of the population is vaccinated(接种疫苗）.Until then, life will not return to normal.
As the pandemic slows in developed nations,it will accelerate in developing ones.Their experience,however,will be worse.In poorer countries,where fewer jobs can be done remotely,distancing measures won't work as well.The virus will spread quickly,and health systems won't be able to care for the infected.
Wealthy nations can help.But people in rich and poor places alike will be safe only once we have an effective medical solution for this virus,which means a vaccine.
My hope is that,by the second half of 2021,facilities around the world will be manufacturing a vaccine.If that's the case,it will be a history-making achievement: the fastest humankind has ever gone from recognizing a new disease to immunizing （免疫）against it.
Apart from this progress in vaccines,two other big medical breakthroughs will emerge from the pandemic.One will be in the field of diagnostics.The next time a novel virus crops up,people will probably be able to test for it at home.Researchers could have such a test ready within a few months of identifying a new disease.
The third breakthrough will be in antiviral drugs.We haven't been as effective at developing drugs to fight viruses as we have those to fight bacteria.But that will Researchers will develop large diverse libraries of antivirals,which they'll be able to scan trough and quickly find effective treatments for novel viruses.
All three technologies will prepare us for the next pandemic by allowing us to intervene(干预）early when the number of cases is still very low.
Our progress won't be in science alone.It will also be in our ability to make sure everyone benefits from that science.In the years after 2021,I think we'll learn from the years after 1945. With the end of the Second World War, leaders built international institutions like the UN to prevent more conflicts.After covid-19, leaders will prepare institutions to prevent the next pandemic.
These will be a mix of national,regional and global organizations.I expect they will participate in regular"germ games”in the same way as armed forces take part in War games.These will keep us ready for the next time a novel virus jumps from bats or birds to humans.
I hope wealthy nations include poorer ones in these preparations,especially by devoting more foreign aid to building up their primary health-care systems.This pandemic has shown us that viruses don't obey border laws and that we are all connected biologically by a network of microscopic germs,whether we like it or not.
The best analogy(类比）for today might be November 10th 1942.Britain had just won its first land victory of the war,and Winston Churchill declared in a speech: “This is not the end.It is not even the beginning of the end.But it is,perhaps,the end of the beginning.”
1.What are the three technologies that will prepare us for the next pandemic?
①manufacturing a vaccine fast
②diagnosing a virus at home
③developing antiviral drugs
④allowing us to intervene early
A.①②③ B.①②④ C.①③④ D.②③④
2.As far as poorer countries are concerned,which of the following is TRUE according to this passage?
A.pandemic disease is more likely to begin in poorer countries
B.Working from home can work well in poorer countries.
C.Health systems are sufficient to care for the infected in poorer countries.
D.Virus will cross borders if poorer countries fail to contain it.
3.Why is the Second World War mentioned in Para.8?
A.The fight against the COVID-19 is similar to the Second World War.
B.People are suffering just as they were in the Second World War.
C.We should cooperate globally just as we did after the Second World War.
D.Countries are fighting each other like in the Second World War.
4.What is the tone of this passage?
A.pessimistic B.optimistic
C.neutral D.indifferent
高二英语阅读理解困难题查看答案及解析
When Chinese researchers successfully figured out the genetic structure of the novel coronavirus in January, many people thought a vaccine(疫苗) would soon follow. 1.
First, scientists must work together to understand the structure of the virus and develop potential vaccines to fight against it. 2. After passing animal tasting, clinical trials of the vaccine are then done on humans. Finally the vaccine needs to be approved by officials before it can be made available to the public. All of the steps are necessary to make sure that the new vaccine is safe for people to use. 3. With technological advancements and government funding (资金), the time it takes to develop vaccines can be reduce.
CEPI, an international organization that develops vaccine, for example, is funding programs that focus on making a vaccine for the novel coronavirus. About 35 companies and academic institutions, including the US company Moderna, funded by CEPI, are searching for a COVID-19 vaccine. 4. Once a vaccine is ready, 100 million doses (剂量) could be made within a year, according to Modena’s CEO Stephane Bancel.
5. Not only do they help to save individual lives, but they also help the local and even the global community.
A.This is why a vaccine is developed.
B.But that’s a lot easier said than done.
C.However, experts say vaccines are unlikely to be available
D.Once these first vaccines are made, they are tested on animals.
E.Sometimes, this process can take as long as 10 to 15 years to complete.
F.Even though vaccines take a long time to develop, they are very important.
G.A few have begun testing in animals, while Moderna’s attempt has started human trials.
高二英语七选五困难题查看答案及解析
14 days. That’s the time Chinese scientists took to identify the full genetic sequence of the novel coronavirus (新冠病毒) since its outbreak. It was shared with the WHO immediately, and has now become an important foundation for global researchers in the fight against the COVID-19. But first, let us turn the clock back 17 years, when it took months to identify the SARS virus. From months to 14 days, what changed? It turns out AI played an important part.
The scientists first obtained bronchoalveolar lavage (BAL) fluid (支气管扩张灌洗液) samples from patients, isolated (分离) the DNA and RNA, then sequenced the genetic material by comparing them. AI’s advantage is its ability to recognize patterns among a flood of data.
Let me put it in a simple way. Sequencing the coronavirus genome (基因组) is similar to looking for a needle in a haystack (干草堆)---looking for genotypes (基因型) with specific characteristics from a huge gene pool. That’s where search algorithm (算法), a branch of modern AI, comes in. Think of it as an efficient search engine, which can find the needle in the haystack. This search algorithm can shorten months-long genetic sequencing to weeks or even just a few days. Combined with macro-genomic sequencing and a virus library, this AI technology can also be used in tracking virus mutation (突变).
AI doesn’t just support scientists. It can also help patients by improving the efficiency of diagnosis (诊断). China launched a Genomics Service, which can run multiple virus gene comparisons and produce a detailed report within 60 seconds. This algorithm has been put into use in China and shared to the world for free.
1.AI’s advantage is that it can ________.
A.slow down the spread of coronavirus B.separate DNA from RNA
C.identify specific genotypes rapidly D.obtain samples from patients quickly
2.The search algorithm helps shorten the time of genetic sequencing by __________.
A.finding a needle in a haystack B.serving as a search engine
C.combining with a virus library D.tracing virus mutation
3.What do we know about the Genomics Service in the last paragraph?
A.It has been widely used in the world. B.It is mainly based on blood test.
C.It is for fast diagnosis of COVID-19. D.It is used to track COVID-19 patients.
4.What’s the best title of the passage?
A.14 Days---China Made it! B.AI Assists in COVID-19 Fight
C.Search Algorithm, Best Choice D.China’s Genomics Service
高二英语阅读选择中等难度题查看答案及解析
While_________________(症状）of flu and COVID-19 may be similar,humans' ability to fight off the viruses differs greatly. (根据中文提示完成句子)
高二英语根据汉语意思填空困难题查看答案及解析
The 3D-printing industry is accelerating its efforts to help fight the new coronavirus and the disease it causes, COVID-19.
On Tuesday, HP announced it’s working with those who bought its 3D printers to make medical face shields, hands-free door openers and an adjuster for face masks for medical staff who often must wear them for hours. It’s also testing “hospital-grade” face masks meeting the higher-end FFP3 (过滤式面罩) standard and parts for simple emergency ventilators (呼吸机) and it’s looking into nasal swabs to test for COVID-19 infection. HP also is offering free downloads of its 3D-printed medical equipment designs.
Carbon, whose 3D printers are used to make everything from bicycle seats to teeth straighteners, said it plans to send face shield designs to its network of customers who’ve bought its 3D printers. Carbon co-founder and Executive Chairman Joseph DeSimone said on Monday the company expects to send the designs by early Tuesday.
3D-printcr makers typically sell their products to others that actually do the 3D printing. One such customer, Ford, said Tuesday that it’s made 1,000 face shields and shipped them to Michigan hospitals, with plans to make 100,000 face shields a week. It is also working with 3M and General Electric on respirator masks and ventilator designs.
The effort is one of several to apply 3D-printing technology to the fight against coronavirus. 3D printing isn’t as fast at churning out products as conventional mass production methods. But 3D printers are flexible and able to make many different parts anywhere there’s a printer and raw materials like the plastic resins Carbon printers use.
Some 3D-printing efforts have focused on ventilators, which expected to be in short supply with a surge of COVID-19 patients suffering from respiratory (呼吸器官) problems. Also in short supply arc N95 masks that can be useful in reducing the likelihood a wearer will spread COVID-19 to others.
Carbon’s DeSimone is cautious about the enthusiasm, though, saying that regulatory approval is important and that 3D-printcr enthusiasts shouldn’t be making components not intended for close human contact that might release unhealthy gases.
1.What is the passage mainly about?
A.An introduction about 3D-printing.
B.The 3D-printing industry’s efforts to help fight COVID-19.
C.The products that 3D-printing makers sell.
D.How 3D-printing makers produce medical equipment.
2.HP announced to help its customers to make the following products except for_____________.
A.medical face shields B.hands-free door openers
C.an adjuster for face masks D.emergency ventilators
3.Which of the following is true according to the passage?
A.Carbon’s company will finish its design after Tuesday.
B.Ford has made 1,000 face shields end plans to make 10,000 more in a week.
C.3D printers are more flexible than traditional mass production methods.
D.Most 3D-printings focus on making ventilators and N95 because of their short supply.
4.What can be inferred from the last paragraph?
A.3D-printing may release unhealthy gases.
B.DeSimone is cautious about 3D-printing.
C.Carbon’s company didn’t gain regulatory approval of making medical equipment.
D.3D printers aren’t enthusiastic about making components designed for close human contact.
高二英语阅读选择中等难度题查看答案及解析
When Central Bucks South became one of the first Philadelphia-area high schools to close due to fear of novel coronavirus exposure in early March, 16-year-old sophomore Andrew knew that things were not going to return to normal as quickly as some of his peers hoped. But still, he disliked the uncomfortable feeling from seeing his friends on the swim team during daily practices to learning alone at home. “I only have three years here at South, and it pains me to see one of them being wasted,” he said.
The coronavirus has affected everyone’s life, especially for students. Schools closed and graduation ceremonies were canceled. Summer plans, like camps and internships (实习)are up in the air. And for recent college graduates, entering the job market in a time of unprecedented (空前的) unemployment rates is no easy task.
Josh Harycki, 17, a senior student at the Shipley School in Philadelphia, who created a “social distancing pledge” for young people. “I saw a lot of younger generations not paying attention, he said. “They were still going out, hanging out with people. I thought that there had to be a way to reach younger people, who were probably not watching the news.”
Harycki launched a call to action on social media and then built a website with a map that tracked the locations of people who’d signed the pledge. The site also shares links to accurate sources of information like the US Centers for Disease Control and Prevention. “ Going from being around with friends for eight hours a day at school to being isolated at home all day wasn’t easy, said Harycki.
We’ve definitely had times when we feel kind of bored at home,” he said. “We are very social beings and we are used to having that school experience. “
Harycki knows that his peers are worried they can’t connect with their friends in the same way, so he created the social distancing pledge to stress that while everyone might be physically distant they are still connected. “Part of what we are highlighting is that you might feel like you are the only one taking this seriously, but our map shows that you’re not alone,” he said.
1.What does “the uncomfortable feeling” in Paragraph 1 refer to?
A.Andrew missed his friends on the swim team.
B.Andrew would rather go swimming than study at home.
C.Andrew hoped he could learn with his friends on the swim team every day.
D.Andrew felt lonely because of long-term learning at home due to COVID-19.
2.What’s the meaning of the underlined phrase “up in the air” in Paragraph 2?
A.Certain position is replaced. B.Projects cannot be continued.
C.Plans are developed smoothly. D.Schools are closed for the moment.
3.Which of the following statements about “social distancing pledge” is TRUE?
A.It can help young people to get together to watch news.
B.It can offer a site to share young people’s school experiences.
C.It can help reduce young students’ feeling of loneliness with mapping locations.
D.It can give young people an accurate map when they are going to hang out with friends.
4.What’s the best title for this text?
A.Social Distancing Pledge for Young Students B.Young People Fight Against COVID-19
C.A Magical Map for Young Students D.Don’t Be Afraid of Loneliness
高二英语阅读选择中等难度题查看答案及解析
The sudden outbreak of the novel coronavirus（新冠状病毒）left an uncommon threat. We don’t know how bad it will be, nor do we know for how long it will spread. But we do know that it has already infected more than 11,998,020 people and killed many around the world. It has also caused serious economic damage. We need to adapt our responses to different countries and different parts of the same country in order to limit damage. Using data well is essential to such a successful response.
Data is key to all successful public health programs. In Arrian, we raised tobacco taxes and made all indoor public places smoke-free. Smoking rates declined at first but then the decline stopped. Because we had a tracking system in place, we realized that progress had stopped. So, we produced strong and direct no tobacco ads to the public. Our program quickly reduced adult and teenager smoking, preventing more than 100,000 deaths.
Every country facing the coronavirus disease needs to strengthen their data systems to track diseases, investigate skillfully and respond fast and successfully. Fast action will save lives and save money. But building the capacity to do this isn’t free. It will cost about $1 to $2 per person per year for at least 10 years-at least $30 billion. That’s a lot of money for public health, but it’s a tiny part of the amount lost when we don’t know what we need to know about health threats.
Getting the data right is hardly quick and never easy, but it is always very important if we want to respond successfully, limit spread, and protect our communities and economy.
1.Which of the following can best describe the measure taken in Arrian?
A.proud B.unpopular C.modest D.effective
2.Why does the author talk about smoking in Paragraph 2?
A.To warn us that smoking is harmful.
B.To suggest us how to reduce smoking.
C.To show the significant role of data.
D.To protect people’s physical health.
3.What is the author’s opinion on the building of the capacity of fast response?
A.It is too expensive and many countries cannot afford it.
B.It is worthwhile and necessary to develop such a capacity.
C.It supports communities and save lives and money.
D.It requires a tiny part of the amount lost by threats.
4.What could be the best title for the text?
A.The secret of widespread threat
B.The secret of successful response
C.The secret of uncommon disease
D.The secret of right data
高二英语阅读选择中等难度题查看答案及解析
Nature can provide almost everything human beings need if we follow her rules. But if we break the rules, she is likely to be cruel and lash out at us.
The outbreak of the COVID-19 in China and some other countries is an example. Dr Peter Daszak, president of the US-based health organization, said, “This outbreak is a lesson for us. On a global scale (规模), human population density (密度), wildlife diversity, and land use change are what drive new pandemics (流行病).”
In ancient times, people needed to rely on nature to survive so they held it in awe (敬畏). For example, the American Indians believed that humans are a part of nature and nature is a part of humans. Chinese ancients always tried to keep the harmony between nature and human beings.
However, as human beings master more knowledge and make more advanced tools, people try to change and even conquer nature. They use more land to make buildings and capture wild and rare animals to suit their own needs. In this process, humans gradually lose contact with nature and even throw it out of balance.
Although we don’t know for sure what first caused the COVID-19 outbreak, it’s time for people to reflect on our relationship with our planet and reconnect with this world and everything that we’ve been given. After all, nature is not the place to visit. It’s our home.
1.What does the phrase “lash out at” in Paragraph 1 probably mean?
A.Control. B.Challenge. C.Destroy. D.Punish.
2.What lesson did Daszak think human beings should learn from the COVID 19 outbreak?
A.Humans should live peacefully with nature.
B.Bats are one of the most dangerous wild animals.
C.We should stop the wildlife trade around the world.
D.It’s impossible to prevent new pandemics globally.
3.What is the main idea of Paragraph 4?
A.How human activities cause global warming.
B.How human beings break the balance of nature.
C.How human beings become their own masters.
D.How humans use technology to improve their lives.
4.What is the author’ s purpose in writing this article?
A.To reflect on the COVID-19 outbreak.
B.To explain what led to the COVID-19 outbreak.
C.To describe experts’ predictions on new pandemics.
D.To compare ancient and modern attitudes toward nature.
高二英语阅读选择中等难度题查看答案及解析