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Chemical reactions in our brains change with what we think.
A．Y
B．N
C．NG
答案
更多“Chemical reactions in our brains change with what we think.A．YB．NC．NG”相关的问题
第1题
第2题
Over 100,000 chemical reactions _____ the brain every second.
A.take place in
B.take the place of
C.give place to
D.give place of
第3题
How does aspirin reduce fever？
A．It slows down human reactions to fever.
B．It prevents the formation of the fever-related chemical reactions.
C．It interferes with the formation of some acids.
D．It makes human body unconscious of pains.
第4题
第5题
A．majority
B．distribution
C．rest
D．stability
第6题
What can be inferred from this？
A．Sometimes natural air pollutants can purify air.
B．Natural air pollutants are harmful to people.
C．There are some chemical reactions in the air.
D．Air pollutants move from air to water or soil.
第7题
Americans this year will swallow 15,000 tons of aspirin, one of the safest and most effective drugs invented by man. The most popular medicine in the world today, it is an effective pain reliever. Its bad effects are relatively mild, and it is cheap.
For millions of people suffering from arthritis(关节炎), it is the only thing that works. Aspirin, in short, is truly the 20th century wonder drug. It is also the second largest suicide drag and is the leading cause of poisoning among children, it has side effects that, although relatively mild, are largely unrecognized among uses.
Although aspirin was first sold by a German company in 1899, it has been around much longer than that. Hippocrates, in ancient Greece, understood the medical value of the leaves and tree bark which today are known to contain salicylates(水杨酸盐), the chemical in aspirin. During the 19th century, there was a great deal of experimentation in Europe with this chemical, and it led to the introduction in Europe with this chemical, and it led to the introduction of aspirin. By 1915, aspirin tablets were available in the United States.
A small quantity of aspirin(two five-grain tablets) relieves pain and inflammation(炎症). It also reduces fever by interfering with some of the body's reactions. Specifically, aspirin seems to slow down the formation of the acids involved in pain and the complex chemical reactions that cause fever. The chemistry of these acids is not fully understood, but the slowing effect of aspirin is well known.
Aspirin is very irritating to the stomach, and many aspirin takers complain about upset stomach. There is a right way and a wrong way to take aspirin. The best way is to chew the tablets before swallowing them with water, but few people can stand the bitter taste. Some people suggest crushing the tablets in milk or orange juice and drinking that.
A good title for this article would be______.
A．Why I Take Aspirin
B．The Side Effects of Aspirin
C．Aspirin: The Most Popular Medicine in the World
D．Aspirin, a Good Medicine
第8题
听力原文：M: So, what is your biology project about？
W: It is about microorganisms that live by chemosynthesis.
M: Err...what's chemosynthesis？
W: Well, it's pretty complicated. You know how most life on Earth depends either directly or indirectly on sunlight？
M: You mean like plants get energy directly from sunlight, and animals eat plants, so they depend indirectly on sunlight？
W: Right. But down on the ocean floor, there is no sunlight. In some places though, there are hydrothermal vents, which are small cracks on the ocean floor. And these vents release heat and minerals from the inside of the Earth into the seawater. And all along the vents there are these unusual microorganisms. They are called archaean. And these archaean use chemical reactions to get their energy from the minerals. The minerals that are released by the vents. So their energy comes from chemical reactions, not sunlight.
M: So chemosynthesis is getting their energy from chemicals？
W: That's right.
M: That makes archaean very different from other forms of life.
W: And their genetic makeup is very different, too. They are one sort of organisms just like bacteria are, but genetically they are as different from bacteria as we humans are.
M: Wah, that's a really interesting project.
(23)
A．How hydrothermal vents are formed.
B．How living things get energy from sunlight.
C．The harmful effects of certain chemicals in the ocean.
D．Microorganisms that get energy from chemical reactions.
第9题
Electromagnetic Energy
White light seems to be a combination of all colors. The energy that comes from a source of light is not limited to the kind of energy you can see. Heat is given off by a flame or an electric light. On a cloudy day it is possible to get a sunburn even though you feel cool. Visible light and the kind of energy that produce warmth and sunburn are examples of electromagnetic energy.
The sun is 93 million miles from the earth. Yet we can use energy from the sun because electromagnetic energy travels through space.
Many other kinds of energy are also types of electromagnetic energy. Radio, television, and radar
signals travel from transmitters to receivers as low-energy electromagnetic waves. Infrared (红外线的) radiation is an electromagnetic wave. When it is absorbed by matter, heat is produced. Waves of infrared and visible light have more energy than waves of radio, television, or radar. Ultraviolet rays (紫外线) and X-rays are electromagnetic waves with even greater amounts of energy. Infrared radiation is used in cooking food and heating buildings. Sunlight and electric lights are part of our requirements for normal living. Ultraviolet radiation is useful in killing certain disease organisms. X-rays and gamma rays have so mush energy that they travel right through solid objects. They can be used to detect and treat cancer. X-rays are used in industry to find hidden cracks in metal, and in medicine to reveal broken bones. Usually we use electricity to generate electromagnetic energy. The source of most of our energy is the sun. Heat from the sun causes water to evaporate. When the water falls to the earth as rain, some of it is trapped behind dams and then used to operate electric generators. Other generators are powered by coal, but the energy stored in coal came from the sun, too.
Until recently, the source of the tremendous amount of energy given off by the sun was a puzzle. If the sun depended on chemical reactions, it would have used up all its energy long ago. Experiments with electromagnetic radiation led to the theory that mass can be converted into energy. About forty years after the theory was proposed, nuclear energy was harnessed (利用) by man. Chemical energy comes from electron (电子) rearrangement. Nuclear energy comes from a Change in the nucleus of an atom. Compared with chemical reactions, nuclear reactions release millions of times more energy per pound of fuel. We now believe that the sun&39;s energy comes from the nuclear reactions in which hydrogen is changed into helium (氦).
Nuclear energy is beginning to compete with coal as an economical source of power to generate electricity. It is also being used to operate engines in large ships. Scientists continue to seek new and better methods of obtaining and using energy.
Paragraph 3 ______.
A. Nuclear reactions as the lasting source of the sun&39;s energy.B. The most important source of energy.C. Types of electromagnetic energy.D. The machines used for energy generation.E. Seeking new sources of energy. F. The use of ultraviolet radiation in medicine.
Paragraph 4 ______.
A. Nuclear reactions as the lasting source of the sun&39;s energy.B. The most important source of energy.C. Types of electromagnetic energy.D. The machines used for energy generation.E. Seeking new sources of energy. F. The use of ultraviolet radiation in medicine.
Paragraph 5 ______.
A. Nuclear reactions as the lasting source of the sun&39;s energy.B. The most important source of energy.C. Types of electromagnetic energy.D. The machines used for energy generation.E. Seeking new sources of energy. F. The use of ultraviolet radiation in medicine.
Paragraph 6 ______.
A. Nuclear reactions as the lasting source of the sun&39;s energy.B. The most important source of energy.C. Types of electromagnetic energy.D. The machines used for energy generation.E. Seeking new sources of energy. F. The use of ultraviolet radiation in medicine.
One can get a sunburn even ______.
A. when it is absorbed by matterB. when it is cloudyC. because they can pass through solid objectsD. when the sunrays are fierceE. when a change in the nucleus of an atom takes place F. when electron rearrangement takes place
Infrared radiation can produce heat ______.
A. when it is absorbed by matterB. when it is cloudyC. because they can pass through solid objectsD. when the sunrays are fierceE. when a change in the nucleus of an atom takes place F. when electron rearrangement takes place
X-rays and gamma rays can be used to detect and treat cancer ______.
A. when it is absorbed by matterB. when it is cloudyC. because they can pass through solid objectsD. when the sunrays are fierceE. when a change in the nucleus of an atom takes place F. when electron rearrangement takes place
Chemical energy is generated ______.
A. when it is absorbed by matterB. when it is cloudyC. because they can pass through solid objectsD. when the sunrays are fierceE. when a change in the nucleus of an atom takes place F. when electron rearrangement takes place
请帮忙给出每个问题的正确答案和分析，谢谢！
第10题
根据下列文章,请回答 23～30 题。
Electromagnetic Energy
1 White light seems to be a combination of all colors. The energy that comes from a source of light is not limited to the kind of energy you can see. Heat is given off by a flame or an electric light. On a cloudy day it is possible to get a sunburn even though you feel cool. Visible light and the kinds of energy that produce warmth and sunburn are examples of electromagnetic energy.
2 The sun is 93 million miles from the earth. Yet we can use energy from the sun because electromagnetic energy travels through space.
3 Many other kinds of energy are also types of electromagnetic energy. Radio, television, and radar signals travel from transmitters to receivers as low-energy electromagnetic waves. Infrared (红外线的) radiation is an electromagnetic wave. When it is absorbed by matter, heat is produced. Waves of infrared and visible light have more energy than waves of radio, television, or radar. Ultraviolet rays (紫外线) and X-rays are electromagnetic waves with even greater amounts of energy. Infrared radiation is used in cooking food and heating buildings. Sunlight and electric lights are part of our requirements for normal living. Ultraviolet radiation is useful in killing certain disease organisms. X-rays and gamma rays have so much energy that they travel right through solid objects. They can be used to detect and treat cancer. X-rays are used in industry to find hidden cracks in metal, and in medicine to reveal broken bones.
4 Usually we use electricity to generate electromagnetic energy. The source of most of our energy is the sun. Heat from the sun causes water to evaporate. When the water falls to the earth as rain, some of it is trapped behind dams and then used to Operate electric generators. Other generators are powered by coal, but the energy stored in coal came from the sun, too.
5 Until recently, the source of the tremendous amount of energy given off by the sun was a puzzle. If the sun depended on chemical reactions, it would have used up all its energy long ago. Experiments with electromagnetic radiation led to the theory that mass can be converted into energy. About forty years after the theory was proposed, nuclear energy was harnessed (利用) by man. Chemical energy comes from electron (电子) rearrangement. Nuclear energy comes from a change in the nucleus of an atom. Compared with chemical reactions, nuclear reactions release millions of times more energy per pound of fuel. We now believe that the sun's energy comes from the nuclear reactions in which hydrogen is changed into helium (氦).
6 Nuclear energy is beginning to compete with coal as an economical source of power to generate electricity. It is also being used to operate engines in large ships. Scientists continue to seek new and better methods of obtaining and using energy.
第 23 题 Paragraph 3__________
A．Nuclear Reactions as the Lasting Source of the Sun's Energy
B．The Most Important Source of Energy
C．Types of Electromagnetic Energy
D．The Machines Used for Energy Generation
E．Seeking New Sources of Energy
F．The Use of Ultraviolet Radiation in Medicine
