Simply by analyzing a drop of blood, a doctor will be able to diagnose a birth defect or even cancer when it is in the early stage; using new technology, a material lighter but much stronger than steel can be produced.
These may sound like dreams at present. But the dreams may soon come true as research findings in laboratories are being turned into products more rapidly in the new century, according to experts participating in the fourth Asia-Pacific Economic Cooperation (APEC) Technomart, a technology exhibition and trade fair in Suzhou.
"Most people think nano-technology(纳米技术)is too far-fetched to be real. But in fact nano-technology has been applied in a wide range of fields, such as medicine. It is coming into our daily life," said Cheng Jiachong from a Hong Kong-based nano-technology firm.
Nano-technology based on the nanometer, the unit of which is a billionth of a meter, enables scientists to have new concepts of disease diagnosis and treatment on a molecular(分子)and atomic scale, Cheng said.
By using nanometer particles, a doctor can separate the fetus cells(胚胎细胞)from the blood of a pregnant woman to see if the development of the fetus is normal. This method is also being used in the early diagnosis of cancer and heart disease, he said.
One of the most significant impacts of nano-technology is at the bio-inorganic materials interface, according to Greg Tegart, executive advisor of the APEC Center for Technology Foresight.
"By combining enzymes(酶)and silicon chips we can produce biosensors. These could be implanted in humans or animals to monitor health and to deliver corrective doses(剂量)of drugs," he told the participants a technology forum during the exhibition.
"Nano-technology could affect the production of nearly every man-made object, from automobiles, tires and computer circuits(电路), to advanced medicines and tissue replacement, and lead to the invention of objects yet to be imagined," said David Minns, a special advisor to the National Research Council of Canada.
It has been shown that carbon nano-tubes are ten times as strong as steel, with one sixth of the weight, and nano-scale systems have the potential to make supersonic transport cost- effective and to increase computer efficiency by millions of times, he said.
The experts agreed that the APEC technology exhibition and trade fair provided many chances for exchanges of innovative ideas and products.
1.Realization of the dreams mentioned in the first paragraph will mainly base on ________.
A. APEC B. Chinese scientist
C. the APEC Center for Technology Foresight D. Nano-technology
2.The length of a nanometer equals to ______.
A. meter B. meter C. meter D. meter
3. We can imply from what David Minns said that _________.
A. Nano-technology could only be used to invent new objects.
B. Nano-technology could be widely used to produce or invent objects.
C. Nano-technology is a money-consuming technology.
D. Nano-technology can not be used to improve the service of Internet.
4. Compared to steel, carbon nano-tubes are ________.
A. stronger and lighter B. lighter but as strong
C. stronger but as light D. poor in quality
高三英语阅读理解中等难度题
Simply by analyzing a drop of blood, a doctor will be able to diagnose a birth defect or even cancer when it is in the early stage; using new technology, a material lighter but much stronger than steel can be produced.
These may sound like dreams at present. But the dreams may soon come true as research findings in laboratories are being turned into products more rapidly in the new century, according to experts participating in the fourth Asia-Pacific Economic Cooperation (APEC) Technomart, a technology exhibition and trade fair in Suzhou.
"Most people think nano-technology(纳米技术)is too far-fetched to be real. But in fact nano-technology has been applied in a wide range of fields, such as medicine. It is coming into our daily life," said Cheng Jiachong from a Hong Kong-based nano-technology firm.
Nano-technology based on the nanometer, the unit of which is a billionth of a meter, enables scientists to have new concepts of disease diagnosis and treatment on a molecular(分子)and atomic scale, Cheng said.
By using nanometer particles, a doctor can separate the fetus cells(胚胎细胞)from the blood of a pregnant woman to see if the development of the fetus is normal. This method is also being used in the early diagnosis of cancer and heart disease, he said.
One of the most significant impacts of nano-technology is at the bio-inorganic materials interface, according to Greg Tegart, executive advisor of the APEC Center for Technology Foresight.
"By combining enzymes(酶)and silicon chips we can produce biosensors. These could be implanted in humans or animals to monitor health and to deliver corrective doses(剂量)of drugs," he told the participants a technology forum during the exhibition.
"Nano-technology could affect the production of nearly every man-made object, from automobiles, tires and computer circuits(电路), to advanced medicines and tissue replacement, and lead to the invention of objects yet to be imagined," said David Minns, a special advisor to the National Research Council of Canada.
It has been shown that carbon nano-tubes are ten times as strong as steel, with one sixth of the weight, and nano-scale systems have the potential to make supersonic transport cost- effective and to increase computer efficiency by millions of times, he said.
The experts agreed that the APEC technology exhibition and trade fair provided many chances for exchanges of innovative ideas and products.
1.Realization of the dreams mentioned in the first paragraph will mainly base on ________.
A. APEC B. Chinese scientist
C. the APEC Center for Technology Foresight D. Nano-technology
2.The length of a nanometer equals to ______.
A. meter B. meter C. meter D. meter
3. We can imply from what David Minns said that _________.
A. Nano-technology could only be used to invent new objects.
B. Nano-technology could be widely used to produce or invent objects.
C. Nano-technology is a money-consuming technology.
D. Nano-technology can not be used to improve the service of Internet.
4. Compared to steel, carbon nano-tubes are ________.
A. stronger and lighter B. lighter but as strong
C. stronger but as light D. poor in quality
高三英语阅读理解中等难度题查看答案及解析
At least 35 percent of Beijing households will be covered by family doctor service at the end of this year. All local households will enjoy the service as of 2020, according to the Municipal Health and Family Planning Commission.
It is good that Chinese communities can expect more general practitioners(从业者),who do not specialize in any particular area of medicine but who are able to treat the general health problems for people of all ages. By the end of last year over 8 million residents in Beijing had reportedly signed up for family doctor services, accounting for more than 40 percent of the city’s permanent population.
Since 2009 China has launched scores of programs nationwide to ensure citizens have fairer access to elementary public health services ,among which the introduction of family doctors has been one of the most successful. Some regions have issued guidelines on the promotion of the family doctor service. And four months ago, Premier Li Keqiang said in this year’s Government Work Report that the service should cover at least 85 percent of the Chinese cities this year.
The expanding coverage, however, may not guarantee more residents will be offered quality medical services.
Family doctors in some places rarely visit the families they are assigned to, and some of them have been struggling to solve patients problems either because of their unfitness or because they have too many households to attend to. In some cases, a family doctor might be assigned to see hundreds of residents a day.
That highlights the need to better the arrangement of medical resources and to offer proper encouragement to family doctors, who should get patients to make appointments rather than employ temporary arrangements.
1.How many permanent people were living in Beijing by the end of last year?
A. About 20 million.
B. About 8 million.
C. About 85 million.
D. About 32 million.
2.What is the government’s attitude to public health services?
A. Cautious.
B. Favorable.
C. Ambiguous.
D. Disapproving.
3.From the fifth paragraph we can infer that .
A. some family doctors seldom visit the assigned families
B. some residents can’t get quality medical services
C. some family doctors have no ability
D. the new program still faces some problems
4.What is the best title for the text?
A. Family Doctor’s Quality Service Matters.
B. Medical Resources in China.
C. Beijing’s Permanent Population in 2017.
D. The Introduction of Family Doctors.
高三英语阅读理解中等难度题查看答案及解析
Many people have long dreamed of being able to fly around as simply as riding a bicycle. Yet the safety and strength of a flying bike was always a big problem. Over the past 10 years, developments in technology have moved the dream of personal flying vehicles closer to reality. Now, two groups of inventors say such vehicles may be available soon.
The British company Malloy Aeronautics has developed a prototype (原型) of its flying bicycle. Grant Stapleton, marketing sales director of Malloy Aeronautics, says the Hoverbike is able to get in and out of small spaces very quickly." It can be moved across continents very quickly because it can be folded and packed," he adds.
Mr. Stapleton says safety was the company's main concern. He says the designers solved the safety issue by using overlapping rotors to power the vehicle.
The company is testing a full-size prototype of the Hoverbike, which will most likely be used first by the police and emergency rescue teams.
In New Zealand, Martin Aircraft Company is also testing a full-size prototype of its personal flying device, called the Jetpack. It can fly for more than 30 minutes, up to
1, 000meters high and reach a speed of 74 kilometers per hour.
Peter Coker is the CEO of Martin Aircraft Company. He said the Jetpack "is built around safety from the start". In his words, “Reliability is the most important element of it. We have safety built into the actual structure itself, very similar to a Formula One racing car.
The Jetpack uses a gasoline-powered engine that produces two powerful jet streams. Mr. Coker says it also has a parachute that would be used, if there should be an emergency. "It starts to work at very low altitude and actually saves both the aircraft and the pilot," he adds. Mr. Coker says the Jetpack will be ready for sale soon.
1.We can learn from the passage that the Hoverbike
A. can hardly get in and out of small spaces quickly.
B. can fly for over 30 minutes, up to l, 000 meters high.
C. has been used by the police and emergency rescue teams.
D. can be transported quickly after being folded and packed.
2.Peter Coker uses the example of Formula One racing car to show that
A. the Jetpack is very safe and reliable.
B. the engine of the Jetpack is powerful.
C. the actual structure of the Jetpack is unique
D. the Jetpack can reach a great speed and height
3.The underlined word "It" in the last paragraph refers to .
A. the jet stream B. the engine
C. the Jetpack. D. the parachute
4.What is the author’s main purpose of writing the passage?
A. To describe the problems of inventing flying vehicles.
B. To introduce the latest development of flying vehicles.
C. To show the differences between two flying vehicles.
D. To advertise the two personal flying vehicles.
高三英语阅读理解中等难度题查看答案及解析
Food-security challenges will not be met by simply increasing primary production. Many mostly poor people living in developing countries do need more calories and nutrients, and increases in production are required to satisfy this need. But a significant proportion of these people are becoming wealthier, and if the concomitant (伴随而来的)changes in diet towards the consumption of higher energy foods continue, the nutritional status of this rapidly increasing group will probably diminish, even as its calorific intake grows.
The current status of global nutrition is far from satisfactory. According to the Food and Agriculture Organization (FAO) of the United Nations, 795 million people are hungry. Paradoxically (自相矛盾的是),at least 2 billion people consume too many calories, many of whom also do not get enough nutrients.
The failure to consistently recognize that it is not only people who are hungry but also those who have too few nutrients and those who overconsume calories challenges efforts to address the problem comprehensively(广泛的,综合的). It is essential to increase the supply of food for people who are hungry. There are, however, growing concerns about the health consequences of overconsumption, particularly in the form of empty calories' from foods that contain solid fats or added sugars that supply energy, but little or no other nutrition.
Malnutrition (营养不良)is related to consumption patterns of calories and nutrients, rather than food production. Major determinants of consumption include food preference, allocation, cultural norms, cooking skill and convenience. But, the most important is affordability. It is the increased availability and affordability of processed, high-energy foods for the emerging global middle class to consume a more-Western diet that is making malnutrition a global problem.
Most international efforts to improve food security focus only on hunger and undernutrition. and hence push to increase food production. But this productionist approach will not solve all forms of malnutrition. More emphasis should be placed on changing consumption patterns. This will not only help to identify the root causes of malnutrition, but also send a signal to producers about the nature of foods needed to address malnutrition.
Even with a greater emphasis on consumption, solutions will be far from straightforward. Each actor involved in the food system — from primary producer to retailer (零售商)--- has their own motivations and modes of interaction. To meet the United Nations’ goal of ending all forms of malnutrition by 2030, we need to think about the whole food system. A purely productionist approach will not be sufficient — we need to manage food demand, not just meet it.
1.The underlined word “diminish” in Paragraph 1 most probably means .
A. change B. weaken
C. improve D. maintain
2.According to the passage, what problem with malnutrition has raised growing concerns?
A. Many people are still suffering from starvation.
B. More people prefer to resist the western lifestyle.
C. People fail to realize its causes and consequences.
D. People overconsume calories with poor nutrition.
3.We can learn from the passage that addressing malnutrition will require______.
A. the motivation of the producers
B. changes across the entire food system
C. an increase in food production and supply
D. the improvement of people's living standard
4.Which one is the best title of this passage?
A. Fight against starvation B. Cut down consumption
C. Look beyond production D. Polish up security
高三英语阅读理解困难题查看答案及解析
22. We will never forget this historical lesson written _____ blood.
A.by | B.with | C.of | D.In |
高三英语单项填空简单题查看答案及解析
By no means _____ of our students to drop out of school.
A. will we allow B. we will allow C. we allow D. must we allow
高三英语单项填空中等难度题查看答案及解析
—Do you think you will be able to finish your writing by five o’clock today?
— ______. I’ll be busy with experiments all day.
A.Not a chance B.Not a little C.Not to mention it D.Not a big deal
高三英语单项填空中等难度题查看答案及解析
—Do you think you will be able to finish your writing by five o’clock today?
— ______. I’ll be busy with experiments all day.
A. Not a chance B. Not a little
C. Not to mention it D. Not a big deal
高三英语单项填空中等难度题查看答案及解析
—Do you think you will be able to finish your writing by five o’clock today?
— ______. I’ll be busy with experiments all day.
A.Not a little B.Not a chance C.Not to mention it D.Not a big deal
高三英语单项填空中等难度题查看答案及解析
—Do you think you will be able to finish your writing by five o’clock today?
—______. I’ll be busy with experiments all day.
A.Not a chance B.Not a little C.Not to mention it D.Not a big deal
高三英语单项填空中等难度题查看答案及解析