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How can quantum dots be used to confirm diseases？
A．By traditionally looking at a person's blood under a microscope.
B．By letting a person take some kind of medicine.
C．By lighting up in the presence of a targeted molecule.
D．By subjecting a person to an X-ray examination.
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A.By traditionally looking at a person"s blood under a microscope.
B.By letting a person take some kind of medicine.
C.By lighting up in the presence of a targeted molecule.
D.By subjecting a person to an X-ray examination.
Bringing Nanotechnology to Health Care for the Poor
Nanotechnology uses matter at the level of molecules and atoms. Researchers are finding different uses for particles with a length of one nanometer, or one-billionth of a meter. These include things like beauty products and dirt-resistant clothing. But one area where many experts believe nanotechnology holds great promise is medicine.
Last week, speakers at a program in Washington discussed using nanotechnology to improve health care in developing countries. The program took place at the Woodrow Wilson International Center for Scholars. Peter Singer at the University of Toronto says a nanotechnology called quantum dots could be used to confirm cases of malaria. He says it could offer a better way than the traditional process of looking at a person's blood under a microscope.
In poor countries, this process is often not followed. As a result, sick people may get treated for malaria even if they do not have it. Such misuse of medicines can lead to drug resistance. Quantum dots are particles that give off light when activated. Researchers are studying ways to program them to identify diseases by lighting up in the presence of a targeted molecule.
Experts say nanotechnology shows promise not just for diagnosing diseases, but also for treating them. Piotr Grodzinski of the National Institutes of Health talked about how nanotechnology could make drugs more effective. He talked about cancer drugs already developed with nanotechnology. He says if a drug can target a cancer locally in the body, then much less of it might be needed, and that means lower side effects.
Andrew Maynard is chief scientist for the Project on Emerging Nanotechnologies at the Woodrow Wilson Center. He noted that Brazil, India, China and South Africa are currently doing nanotechnology research that could help poor countries. But he also noted that there is some risk in using nano-materials. He says nanometer-sized particles behave differently in the body and the environment compared to larger particles. Experts say more investment in research is needed to better understand these risks.
Which of the following uses of nanotechnology is NOT mentioned in the passage？
A．To make beauty products and dirt-resistant clothing.
B．To produce better and lighter building materials.
C．To help more accurately diagnose diseases.
D．To help more effectively treat diseases.
Bringing nanotechnology to health care for the poor
Nanotechnology uses matter at the level of mo1ecules and atoms .Researchers are finding different uses for particles with a length of one nanometer，or one—billionth of a meter．These include things like beauty products and dirt—resistant clothing． But one area where many experts believe nanotechnology holds great promise is medicine．
Last week， speakers at a program in Washington discussed using nanotechnology to improve health care in developing countries．The program took place at the Woodrow Wilson International Center for Scholars．Peter Singer at the University of Toronto says a nanotechnology called quantum dots could be used to confirm eases of malaria．He says it could offer a better way than the traditional process of looking at a person’s blood under a microscope．
In poor countries，this process is often not followed． As a result，sick people may get treated for malaria even if they do not have it． Such misuse of medicines can lead to drug resistance. Quantum dots are particles that give off light when activated． Researchers are studying ways to program them to identify diseases by lighting up in the presence of a targeted molecule．
Experts say nanotechnology shows promise not just for diagnosing diseases，but also for treating them. Piotr Grodzinski of the National Institutes 0f Health talked about how nanotechnology could make drugs more effective．He talked about cancer drugs already developed with nanotechnology．He says if a drug can target a cancer locally in the body，then mach less of it might be needed，and that means lower side effects．
Andrew Maynard is chief scientist for the Project on Emerging Nanotechnologies at the WoodrowWilson Center．He noted that Brazil，India，China and South Afrieca are currently doing nanotechnology research that could help poor countries． But he also noted that there is some risk in using nano—materials. He says nanometer—sized particles behave differently in the body and the environmentcompared to larger particles． Experts say more investment in research is needed to better understand these risks．
第 36 题 Which of the following uses of nanotechnology is NOT mentioned in the passage？
A．To make beauty products and dirt—resistant clothing．
B．To produce better and lighter building materials．
C．To help more accurately diagnose diseases．
D．To help more effectively treat diseases．
Bringing nanotechnology to health care for the poor
Nanotechnology uses matter at the 1evel of molecules and atoms．Researchers are finding different uses for particles with a length of one nanometer，or one-billionth of a meter. These include things like beauty products1 and dirt-resistant clothing．But one area where many experts believe nanotechnology holds great promise is medicine．
Last week，speakers at a program in Washington discussed using nanotechnology to improve health care in developing countries． The program took place at the Woodrow Wilson International Center for Scholars． Peter Singer at the University of Toronto says a nanotechnology called quantum dots2 could be used to confirm cases of malaria. He says it Could offer a better way than the traditional process of looking at a person’s blood under a microscope．
In poor Countries，this process is often not followed． As a result，sick people may get treated for malaria even if they do not have it． Such misuse of medicines can lead to drug resistance. Quantum dots are panicles that give off3 light when activated． Researchers are studying ways to program them to identify diseases by lighting up in the presence of a targeted molecole4．
Experts say nanotechnology shows promise not just for diagnosing diseases，but also for treating them． Piotr Grodzinski of the National Institutes of Health5 talked about how nanotechnology could make drugs more effective． He talked about cancer drugs already developed with nanotechnology． He says if a drug can target a cancer locally in the body，then much less of it might be needed，and that means lower side effeets6．
Andrew Maynard is chief scientist for the Project on Emerging Nanotechnologies at the Woodrow Wilson Center． He noted that Brazil，India，China and South Africa are currently doing nanotechnology research that could help poor countries．But he also noted that there is some risk in using nano-materials．He says nanometer-sized particles behave differently in the body and the environment compared to larger particles7．Experts say more investment in research is needed to better understand these risks．
第 1 题 Which of the following uses of nanotechnology is NOT mentioned in the passage'？
A．To make beauty products and dirt-resistant clothing．
B．To produce better and lighter building materials．
C．To help more accurately diagnose diseases．
D．To help more effectively treat diseases．
A. traditional lighting is less durable and dearer
B. a laser excited the quantum dots
C. America adopted LEDS
D. graduate students work hard
E. quantum dot mixtures are magic
F. it is more efficient
Unlike traditional lighting, LEDs do not give out heat so ______.
LED Lighting
1 An accidental discovery announced recently has taken LED lighting to a new level, suggesting it could soon offer a cheaper, longer-lasting alternative to the traditional light bulb. The breakthrough adds to a growing trend that is likely to eventually make Thomas Edison&39;s bright invention obsolete. LEDs are already used in traffic lights, flashlights, and architectural lighting. They are flexible and operate less expensively than traditional lighting.
2 Michael Bowers, a graduate student2 at Vanderbilt University, was just trying to make really small quantum dots, which are crystals generally only a few nanometers big. Quantum dots contain anywhere from 100 to 1,000 electrons. They&39;re easily excited bundles of energy, and the smaller they are, the more excited they get. Each dot in Bowers&39; particular batch was exceptionally small, containing only 33 or 34 pairs of atoms.
3 When you shine a light on quantum dots or apply electricity to them, they react by producing their own light, normally a bright, vibrant color. But when Bowers shined a laser on his batch of dots, something unexpected happened. He was surprised when a white glow covered the table. The quantum dots were supposed to emit blue light, but instead they were giving off a beautiful white glow.
4 Then Bowers and another student got the idea to stir the dots into polyurethane and coat a blue LED light bulb with the mix. The lumpy bulb wasn&39;t pretty, but it produced white light similar to a regular light bulb.
5 LEDs produce twice as much light as a regular 60 watt bulb and burn for over 50,000 hours. The Department of Energy estimates LED lighting could reduce U. S. energy consumption for lighting by 29 percent by 2025. LEDs don&39;t emit heat, so they&39;re also more energy efficient. And they&39;re much harder to break.
6 Quantum dot mixtures could be painted on just about anything and electrically excited to produce a rainbow of colors, including white. The main light source of the future will almost surely not be a bulb. It might be a table, a wall, or even a fork.
Paragraph 1 ______
A LED Lighting Is Not MatureB LED Lighting Will Replace Traditional LightingC Almost Everything Could Be the Main Light Source in the FutureD LED Lighting Has Many AdvantagesE Bowers Made an Unexpected DiscoveryF LED Light Bulbs Look Lumpy
Paragraph 3 ______
A LED Lighting Is Not MatureB LED Lighting Will Replace Traditional LightingC Almost Everything Could Be the Main Light Source in the FutureD LED Lighting Has Many AdvantagesE Bowers Made an Unexpected DiscoveryF LED Light Bulbs Look Lumpy
Paragraph 5 ______
A LED Lighting Is Not MatureB LED Lighting Will Replace Traditional LightingC Almost Everything Could Be the Main Light Source in the FutureD LED Lighting Has Many AdvantagesE Bowers Made an Unexpected DiscoveryF LED Light Bulbs Look Lumpy
Paragraph 6 ______
A LED Lighting Is Not MatureB LED Lighting Will Replace Traditional LightingC Almost Everything Could Be the Main Light Source in the FutureD LED Lighting Has Many AdvantagesE Bowers Made an Unexpected DiscoveryF LED Light Bulbs Look Lumpy
Unlike traditional lighting, LEDs do not give out heat so ______.
A traditional lighting is less durable and dearerB a laser excited the quantum dotsC America adopted LEDsD graduate students work hardE quantum dot mixtures are magicF it is more efficient
Edison&39;s bright invention is likely to be outdated because ______.
A traditional lighting is less durable and dearerB a laser excited the quantum dotsC America adopted LEDsD graduate students work hardE quantum dot mixtures are magicF it is more efficient
Something unexpected happened during Bower&39;s experiment when ______.
A traditional lighting is less durable and dearerB a laser excited the quantum dotsC America adopted LEDsD graduate students work hardE quantum dot mixtures are magicF it is more efficient
Over one quarter of energy consumption for lighting could be saved by 2025 if ______.
A traditional lighting is less durable and dearerB a laser excited the quantum dotsC America adopted LEDsD graduate students work hardE quantum dot mixtures are magicF it is more efficient
请帮忙给出每个问题的正确答案和分析，谢谢！
There is a growing feeling that science, especially what is known as the new physics, can provide answers where religion remains vague and faltering. Many people in search of a meaning to their lives are finding enlightenment in the revolutionary developments at the frontiers of science. Much to the bewilderment of professional scientists, quasi-religious cults are being formed around such unlikely topics as quantum physics, space-time relativity, black holes and the big hang.
How can physics, with its reputation for cold precision and objective materialism, pro- vide such fertile soil for the mystical？ The truth is that the spirit of scientific inquiry has undergone a remarkable transformation over the past 50 years. The twin revolutions of the theory of relativity, with its space-warps and timewarps, and the quantum theory, which reveals the shadowy and unsubstantial nature of atoms, have demolished the classical image of a clockwork universe slavishly unfolding along a predetermined pathway. Replacing this sterile mechanism is a world full of shifting indeterminism and subtle interactions which have no counterpart in daily experience.
To study the new physics is to embark on a journey of wonderment and paradox, to glimpse the universe in a novel perspective, in which subject and object, mind and matter, force and field, become intertwined. Even the creation of the universe itself has fallen within the province of scientific inquiry.
The new cosmology provides, for the first time, a consistent picture of how all physical structures, including space and time, came to exist out of nothing. We are moving towards an understanding in which matter, force, order and creation are unified into a single descriptive theme.
Many of us who work in fundamental physics are deeply impressed by the harmony and order which pervades the physical world. To me the laws of the universe, from quarks to quasars, dovetail together so felicitously that the impression there is something behind it all seems overwhelming. The laws of physics are so remarkably clever they can surely only be a manifestation of genius.
Scientists find the new cults bewildering because they are______.
A．too reactionary
B．based on false evidence
C．derived from inappropriate sources
D．too subjective
There is a growing feeling that science, especially what is known as the new physics, provides answers where religion remains vague and faltering. Many people in search of a meaning to their lives are finding enlightenment in the revolutionary developments at the frontiers science. Much to the bewilderment of professional scientists, quasi--religious cults are being formed around such unlikely topics as quantum physics, space--time relativity, black holes and the big bang.
How can physics, with its reputation for cold precision and objective materialism, provide such fertile soil for the mystical？ The truth is that the spirit of scientific enquiry has undergone a remarkable transformation over the past 50 years. The twin revolutions of the Theory of Relativity, with its space--warps and timewarps, and the quantum theory, which reveals the shadowy and unsubstantial nature of atoms, have demolished the classical image of a clockwork universe slavishly unfolding along a predetermined pathway. Replacing this sterile mechanism is a world full of shifting indeterminism and subtle interactions which have no counterpart in daily experience.
To study the new physics is to embark on a journey of wonderment and paradox, to glimpse the universe in a novel perspective, in which subject and object, mind and matter, force and field, become intertwined. Even the creation of the universe itself has fallen within the province of scientific enquiry.
The new cosmology provides, for the first time, a consistent picture of how all physical structures, including space and time, came to exist out of nothing. We are moving towards an understanding in which matter, force, order and creation are unified into a single descriptive theme.
Many of us who work in fundamental physics are deeply impressed by the harmony and order which pervades the physical world. To me the laws of the universe, from quarks to quasars, dovetail (吻合) together so felicitously that the impression there is something behind it all seems overwhelming. The laws of physics are so remarkably clever that they can surely only be a manifestation of genius.
The author says people nowadays find that traditional religion is ______.
A．a form. of reassurance
B．inadequate to their needs
C．responding to scientific progress
D．developing in strange ways
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