While testing capacity is gaining ground, the road ahead remains long. The health system has never had to manage testing at the scale needed to control this pandemic, and doing so may require extraordinary solutions, expecting that the gap between testing need and testing capacity will only be wider as states reopen.
Health experts have called for testing well beyond current levels. But increasing capacity will be a challenge at every step in the process.
Step 1
A sample, such as saliva (唾液) or sample from the nose or throat, is collected.
Challenge:
Supplies such as swabs (拭子) and vials (瓶子) are specialized and controlled. This makes the supply chain weak to demand increases. In March, testing was held up by a shortage of swabs.
Step 2
The sample is placed in a solution and delivered to lab technologist.
Challenge:
Workforce is already an issue at many labs Hiring is difficult, as only certified technologists are trained to handle the patient samples.
Step 3
Chemical liquids called reagents (试剂) extract and strengthen the virus’s genetic material.
Challenge:
Labs have faced reagent shortages, and industry groups have already noted that a rise in testing demand has the potential to use up supplies.
Step 4
Machines detect the presence of the virus in a sample.
Challenge:
Dozens of test systems have been FDA approved, but many labs lack the up-front money to invest in the technology and growing up.
1.Which organ will we fail to get a testing sample from?
A.The mouth. B.The throat. C.The nose. D.The ears.
2.What is the challenge for Step 4?
A.Supply shortage. B.Workforce in demand.
C.Genetic substances. D.Financial support in advance.
3.What does the passage intend to tell us about?
A.Ways to fight pandemic. B.Testing capacity for viruses.
C.Roadblocks to testing goals. D.Efforts to test viruses.
高二英语阅读选择中等难度题
While testing capacity is gaining ground, the road ahead remains long. The health system has never had to manage testing at the scale needed to control this pandemic, and doing so may require extraordinary solutions, expecting that the gap between testing need and testing capacity will only be wider as states reopen.
Health experts have called for testing well beyond current levels. But increasing capacity will be a challenge at every step in the process.
Step 1
A sample, such as saliva (唾液) or sample from the nose or throat, is collected.
Challenge:
Supplies such as swabs (拭子) and vials (瓶子) are specialized and controlled. This makes the supply chain weak to demand increases. In March, testing was held up by a shortage of swabs.
Step 2
The sample is placed in a solution and delivered to lab technologist.
Challenge:
Workforce is already an issue at many labs Hiring is difficult, as only certified technologists are trained to handle the patient samples.
Step 3
Chemical liquids called reagents (试剂) extract and strengthen the virus’s genetic material.
Challenge:
Labs have faced reagent shortages, and industry groups have already noted that a rise in testing demand has the potential to use up supplies.
Step 4
Machines detect the presence of the virus in a sample.
Challenge:
Dozens of test systems have been FDA approved, but many labs lack the up-front money to invest in the technology and growing up.
1.Which organ will we fail to get a testing sample from?
A.The mouth. B.The throat. C.The nose. D.The ears.
2.What is the challenge for Step 4?
A.Supply shortage. B.Workforce in demand.
C.Genetic substances. D.Financial support in advance.
3.What does the passage intend to tell us about?
A.Ways to fight pandemic. B.Testing capacity for viruses.
C.Roadblocks to testing goals. D.Efforts to test viruses.
高二英语阅读选择中等难度题查看答案及解析
While cleaning the snow on the road, _________.
A. a wallet was found on the ground. B. a wallet appeared on the ground.
C. I found a wallet lying on the ground. D. I found a wallet laid on the ground.
高二英语单项填空中等难度题查看答案及解析
While cleaning the snow on the road, _________.
A. a wallet was found on the ground.
B. a wallet appeared on the ground.
C. I found a wallet lying on the ground.
D. I found a wallet laid on the ground.
高二英语单项填空中等难度题查看答案及解析
With self-driving vehicle technology rapidly advancing, many companies are turning to autonomous robots for the final leg of the delivery process, from the store or local distribution center to the customer. The latest to join the trend is e-commerce giant Amazon. Following a successful eight-month test run in Snohomish County, Washington, the company’s Scout robots have been making the rounds of Irvine, California, since August 6, 2019.
The six-wheeled Scout is about the size of a large cooler with the capacity to carry small or medium-sized packages. The battery-powered vehicle, which moves at a regular walking pace, has been programmed to avoid pedestrians, animals, and unexpected obstacles, such as garbage cans. Its powerful sensors can also detect the movement of a car backing out of a driveway.
To accelerate Scout’s development and bring it nationwide sooner, the company has created several detailed virtual maps of American suburbs and conducted trial deliveries to homes there.
Though Amazon has not shown how Scout ensures the delivery is picked up by the right person, it most likely requires the customers to apply a unique code, texted to them prior to the delivery, to unlock the store box. Also unclear is the number of deliveries Scout can complete before its battery needs to be recharged. Though the initial tests are being conducted with a human for company, the robot will be autonomous in the future. Its location, however, will be tracked at all times—if someone attempts to steal Scout, Amazon employees will be instantly sensed.
However, the eco-friendly robots are unable to climb stairs or open gates, which means that they can only reach consumers who live on the ground level. Additionally, the robots are unable to leave packages at the front door if the customers are not home. Whether these problems get resolved remains to be seen. For now, it appears that humans will still be needed to achieve the ever-growing demand for home and office deliveries.
1.Which of the following descriptions about Scout is right?
A.They can be powered themselves. B.They are strong enough to carry big things.
C.They can run with their six wheels. D.They can avoid obstacles ahead.
2.What about Scout is still confusing to common people?
A.How many deliveries it can do on a full charge. B.Whether it can climb stairs or open gates.
C.How it recognizes the right owner of the things. D.How long it will take to get it fully charged.
3.What does the underlined phrase “prior to” in paragraph 4 mean?
A.due to B.after C.in front of D.before
4.What is the author’s opinion about delivery robots according to the last paragraph?
A.They are not easily available. B.They have some limitations.
C.They will replace humans soon. D.They won’t be well accepted.
高二英语阅读选择中等难度题查看答案及解析
Japanese scientists and technology companies are coming up with new ways to deal with employee shortages in delivery service. How exactly? By introducing a robot that can deliver food to your home. A Japanese company ZMP has launched robot tests recently.
The ZMP's delivery robot in the process of testing is a red box that measures 109 cm and 133 cm in heights and lengths respectively. It is designed to carry up to 100 kilograms of anything with a approximate speed of 4 miles an hour. It has its own navigating system and a map, sensors(传感器)and cameras that allow it to self-drive. These, for now, are its main technical abilities. The next developments will be control of food temperature, and perhaps，voice control and speaking abilities.
The robot will be tested together with a local sushi(寿司)delivery company Ride on Express Co. Upon making a sushi order, customers will receive codes on their smart phones that will allow them to unlock the robot and get their orders out. Similar testing attempts have been undertaken by Domino's Pizza in Australia, where they tested a delivery robot a year ago.
In any case, before robots are able to deliver food or any other goods to real customers, massive testing on public roads or in the public air space will have to take place. While it is in the government's best interest to make up for the shortage of delivery in the Japanese labor market, it is clear that self-driving machines of any kind will not be permitted on the roads until they are fully tested and proven safe enough for public roads. According to the experts, this could take another 3 to 5 years.
In any case, robot delivery is not such a distant future after all, and recent developments show that there is significant market demand for such type of delivery.
1.How do Japanese handle the employee shortages in delivery service?
A.By raising employment and working hours.
B.By employing science and technology.
C.By increasing the salary.
D.By delivering more at a time.
2.What is the second paragraph mainly about?
A.The introduction of delivery robots.
B.The usage of delivery robots.
C.The basic data of delivery robots.
D.The appearance of delivery robots.
3.What's the reaction of Japanese government to delivery robots?
A.Being critical of the technology.
B.Ignoring the development.
C.Being a little bit hesitated.
D.Becoming great interested.
4.What can be the best title for the text?
A.Robot Delivery：New Tests in Japan B.Robot Delivery Coming to Use in Japan
C.Employee Shortage in Delivery in Japan D.Latest Automatic Service：Robots
高二英语阅读选择中等难度题查看答案及解析
Denmark is only about half the size of South Carolina, but it produces more of its electricity from wind than any other country in the world. Denmark now gets 47%of its electricity from wind, and there will be more to come, thanks to a combination of history and policy.
Paul la Cour was a scientist and inventor who experimented with early wind power machines at the start of the 20th century. So it's not surprising that Denmark invested in building wind power the earliest. Since the 1970s,Denmark has been investing in wind energy all over the country. In the 1980s,due to a strong movement opposing nuclear power plants, Denmark increased its production of clean energy even before many other countries considered it.
Even back in 2002,Denmark took climate change warnings seriously. They drew up policies, aiming to cut fossil-fuel emissions by 20%,which they did via renewable energy investment. Some of the world's largest companies in the field—including Vestas, which builds turbines(涡轮机)，and Orsted, which specializes in offshore wind projects—are Danish, so the country has an impact beyond its borders.
The huge impact of Denmark’s wind industry is important. But Denmark is a small country, so while almost 50%of its electricity from wind is admirable, it's also minor in terms of entire global impact.
While Denmark gets half its electricity from 5,758 megawatts (MW) of capacity, Spain's 23,000 MW covers just 18 percent of its electricity supply as it’s a much bigger country. China is the leader in wind energy at 221,000 MW, and the U.S.is the second in the world at about 96,000 MW.
At the end of 2019,lawmakers in Denmark set a new goal: increasing the share of electricity coming from renewable power to 100%.
1.What can we know about Demark?
A.It is a leader in solar energy. B.It is a pioneer in clean energy.
C.It is a victim of climate change. D.It is an advocate of nuclear energy.
2.What is Denmark government's attitude towards fossil-fuel energy projects?
A.Indifferent. B.Ambiguous
C.Positive. D.Opposed.
3.Which country produces the most wind energy in the world?
A.Denmark. B.China. C.The U.S D.Spain.
4.What is the best title for the text?
A.Almost Half of Denmark’s Electricity Comes from Wind Power
B.Denmark's Government Pushes ahead with Fossil-fuel Projects
C.Denmark Has a Great Effect on World's Wind Power Equipment
D.Denmark Has a Long History of Developing Renewable Power
高二英语阅读选择中等难度题查看答案及解析
One day, four lawyers were riding along a country road. There had been a(n) 36 , and the ground was soft. The lawyers rode 37 , talking and laughing. As they were passing through a 38 , they heard some noises in the grass.
“What’s the matter here?” asked one man.
“Oh, it’s only some old robins (知更鸟)!” said another one, “The 39 has blown them out of the nest. They are too young to 40.”
“What a 41! They’ll die,” said the third one.
“Well! They’re nothing but 42,” said the first lawyer.
The three men looked down and saw the mother robin 43 to her mates. Then they rode on, talking and laughing as before. In a few minutes they had 44 the birds. But the fourth lawyer, whose name was Abraham Lincoln, 45. He got down from his 46 and gently took the little ones up. They didn’t seem 47 , but chirped (唧唧叫) softly, as if they knew they were safe.
“Never 48 , my little fellows,” said Mr. Lincoln. Then he looked up to find the nest from which they had 49 . It was much higher than he could reach. But Mr. Lincoln could 50 . He put the birds softly, one by one, into their warm home.
In a few minutes, Mr. Lincoln 51 the others. He had torn his coat on the thorny (多刺的) tree. Then all three of them 52 heartily. They thought it so 53 that a strong man should take so much trouble just for some worthless young birds.
“Gentlemen,” said Mr. Lincoln, “I couldn’t have 54 tonight if I had left those helpless robins to die in the 55 grass.”
Abraham Lincoln afterwards became President of America.
1. A．war B．earthquake C．fire D．rain
2. A．calmly B．nervously C．slowly D．frequently
3. A．forest B．room C．street D．city
4. A．snow B．storm C．light D．flood
5. A．fly B．speak C．move D．eat
6. A．success B．shame C．pity D．case
7. A．trees B．pets C．children D．birds
8. A．dancing B．pointing C．singing D．crying
9. A．dealt with B．forgotten about C．cared for D．turned to
10. A．shouted B．stopped C．considered D．insisted
11. A．wall B．car C．horse D．truck
12. A．frightened B．tired C．interested D．touched
13. A．stay B．mind C．stand D．rest
14. A．learned B．come C．fallen D．heard
15. A．drive B．climb C．cook D．run
16. A．noticed B．blamed C．visited D．joined
17. A．laughed B．jumped C．worked D．cried
18. A．lucky B．clear C．foolish D．dangerous
19. A．changed B．returned C．read D．slept
20. A．wet B．green C．small D．fresh
高二英语完型填空中等难度题查看答案及解析
____ the floor, I found his pen lying on the ground.
A. While sweeping B. While swept
C. If sweeping D. If swept
高二英语单项填空中等难度题查看答案及解析
Have you ever had someone tell you, “If you eat before bed, you're going to get fat” 1. But is eating late at night, specifically after 8 p.m., really going to make you gain weight?
One theory is that your metabolism(新陈代谢)slows down when you're asleep. With a slower metabolism, fewer calories are being burned. Thus the calories you eat right before bed would not be bumped off as much as they would be while you're awake. Although the science seems pretty sound, recent studies have shown that metabolism changes very little while you are asleep. The heart is still beating, lungs are still working, and the brain is still very active. 2. So while we are asleep, we are still burning calories.
3. Carbohydrates(碳水化合物)are one of your body's main sources of energy. When they go unused, they are stored primarily as fat. However, the time of day that carbohydrates are consumed does not play a role as to how much of it is stored as fat.
Actually, weight gain is based on the amount of calories being consumed overall and the amount of calories used overall. 4. It has little to do with the time when you eat. So how come individuals have higher BMIs when they snack' at night? Although there is a relation between the two, it is simply a result of eating too many calories!
Snacks that individuals tend to eat during the night are usually high in sugar and calories, such as ice cream, candy, potato chips, and soft drinks. The time these snacks are consumed does not matter.5..
A.All of these actions take energy.
B.That is to say, you will not get fat if you eat before bed.
C.Anyone eating anytime after the morning will become fat.
D.Food consumed late at night will more likely be stored away.
E.Without ever questioning it, people quickly assume this to be true.
F.Simply speaking, if you eat more calories than you burn, you will gain weight.
G.There's another theory about eating specifically carbohydrates before bed.
高二英语七选五中等难度题查看答案及解析
_________ the floor, I found his pen lying on the ground.
| A．While sweeping | B．While swept | C．If sweeping | D．If swept |
高二英语单项填空中等难度题查看答案及解析