Nuclear power's(核能的) danger to health, safety, and even life itself can be described in one word; radiation(辐射). Nuclear radiation has a certain mystery about it, partly because it cannot be detected (探测) by human senses. It can't be seen or heard, or touched or tasted, even though it may be all around us. There are other things like that. For example, radio waves are all around us but we can't detect them, sense them, without a radio receiver. Similarly, we can't sense radioactivity without a radiation detector. But unlike common radio waves, nuclear radiation is not harmless to human beings and other living things. At very high levels, radiation can kill an animal or human being completely by killing masses of cells (细胞) in important organs (器官). But even the lowest levels can do serious damage. There is no level of radiation that is completely safe. If the radiation does not hit anything important, the damage may not be significant. This is the case when only a few cells are hit, and if they are killed completely. Your body will replace the dead cells with healthy ones. But if the few cells are only damaged, and if they reproduce themselves, you may be in trouble. They reproduce themselves in an unusual way. They can grow into cancer. Sometimes this does not show up for many years.
This is another reason for some of the mystery about nuclear radiation. Serious damage can be done without the knowledge of the person at the time that damage has occurred. A person can be irradiated(放射治疗) and feel fine, then die of cancer five, ten, or twenty years later as a result. Or a child can be born weak or easy to get serious illness as a result of radiation absorbed by its grandparents. Radiation can hurt us. We must know the truth.
1.According to the passage, the danger of nuclear power lies in __________.
A. nuclear mystery B. radiation detection
C. radiation level D. nuclear radiation
2.Radiation can lead to serious results even at the lowest level ________.
A. when it kills few cells
B. though the damaged cells can repair themselves
C. if it damages few cells
D. unless the damaged cells can reproduce themselves
3.Radiation can hurt us in the way that it can _____.
A. kill large numbers of cells in main organs so as to cause death immediately
B. damage cells which may grow into cancer years later
C. affect the healthy growth of our younger generation
D. lead to all of the above results
4.Which of the following can be best inferred from the passage?
A. The importance of protection from radiation cannot be overemphasized (过分强调).
B. The mystery about radiation remains unsolved.
C. Cancer is mainly caused by radiation.
D. Radiation can hurt those who do not know about its danger.
高二英语阅读理解中等难度题
Nuclear power's(核能的) danger to health, safety, and even life itself can be described in one word: radiation(辐射).
Nuclear radiation has a certain mystery about it, partly because it cannot be detected (探测) by human senses. It can't be seen or heard, or touched or tasted, even though it may be all around us. There are other things like that. For example, radio waves are all around us but we can't detect them, sense them, without a radio receiver. Similarly, we can't sense radioactivity without a radiation detector. But unlike common radio waves, nuclear radiation is not harmless to human beings and other living things.
At very high levels, radiation can kill an animal or human being outright by killing masses of cells (细胞) in important organs (器官). But even the lowest levels can do serious damage. There is no level of radiation that is completely safe. If the radiation does not hit anything important, the damage may not be significant. This is the case when only a few cells are hit, and if they are killed outright. Your body will replace the dead cells with healthy ones. But if the few cells are only damaged, and if they reproduce themselves, you may be in trouble. They reproduce themselves in an unusual way. They can grow into cancer. Sometimes this does not show up for many years.
This is another reason for some of the mystery about nuclear radiation. Serious damage can be done without the knowledge of the person at the time that damage has occurred. A person can be irradiated(放射治疗) and feel fine, then die of cancer five, ten, or twenty years later as a result. Or a child can be born weak or easy to get serious illness as a result of radiation absorbed by its grandparents.
Radiation can hurt us. We must know the truth.
1.According to the passage, the danger of nuclear power lies in ________.
A. nuclear mystery B. radiation detection
C. radiation level D. nuclear radiation
2.Radiation can lead to serious results even at the lowest level ________.
A. when it kills few cells
B. if it damages few cells
C. though the damaged cells can repair themselves
D. unless the damaged cells can reproduce themselves
3.Radiation can hurt us in the way that it can ________.
A. kill large numbers of cells in main organs so as to cause death immediately
B. damage cells which may grow into cancer years later
C. affect the healthy growth of our younger generation
D. lead to all of the above results
4.Which of the following can be best inferred from the passage?
A. The importance of protection from radiation cannot be overemphasized (过分强调).
B. The mystery about radiation remains unsolved.
C. Cancer is mainly caused by radiation.
D. Radiation can hurt those who do not know about its danger.
高二英语阅读理解中等难度题查看答案及解析
Nuclear power's(核能的) danger to health, safety, and even life itself can be described in one word; radiation(辐射). Nuclear radiation has a certain mystery about it, partly because it cannot be detected (探测) by human senses. It can't be seen or heard, or touched or tasted, even though it may be all around us. There are other things like that. For example, radio waves are all around us but we can't detect them, sense them, without a radio receiver. Similarly, we can't sense radioactivity without a radiation detector. But unlike common radio waves, nuclear radiation is not harmless to human beings and other living things. At very high levels, radiation can kill an animal or human being completely by killing masses of cells (细胞) in important organs (器官). But even the lowest levels can do serious damage. There is no level of radiation that is completely safe. If the radiation does not hit anything important, the damage may not be significant. This is the case when only a few cells are hit, and if they are killed completely. Your body will replace the dead cells with healthy ones. But if the few cells are only damaged, and if they reproduce themselves, you may be in trouble. They reproduce themselves in an unusual way. They can grow into cancer. Sometimes this does not show up for many years.
This is another reason for some of the mystery about nuclear radiation. Serious damage can be done without the knowledge of the person at the time that damage has occurred. A person can be irradiated(放射治疗) and feel fine, then die of cancer five, ten, or twenty years later as a result. Or a child can be born weak or easy to get serious illness as a result of radiation absorbed by its grandparents. Radiation can hurt us. We must know the truth.
1.According to the passage, the danger of nuclear power lies in __________.
A. nuclear mystery B. radiation detection
C. radiation level D. nuclear radiation
2.Radiation can lead to serious results even at the lowest level ________.
A. when it kills few cells
B. though the damaged cells can repair themselves
C. if it damages few cells
D. unless the damaged cells can reproduce themselves
3.Radiation can hurt us in the way that it can _____.
A. kill large numbers of cells in main organs so as to cause death immediately
B. damage cells which may grow into cancer years later
C. affect the healthy growth of our younger generation
D. lead to all of the above results
4.Which of the following can be best inferred from the passage?
A. The importance of protection from radiation cannot be too overemphasized (过分强调).
B. The mystery about radiation remains unsolved.
C. Cancer is mainly caused by radiation.
D. Radiation can hurt those who do not know about its danger.
高二英语阅读理解中等难度题查看答案及解析
Nuclear power's(核能的) danger to health, safety, and even life itself can be described in one word; radiation(辐射). Nuclear radiation has a certain mystery about it, partly because it cannot be detected (探测) by human senses. It can't be seen or heard, or touched or tasted, even though it may be all around us. There are other things like that. For example, radio waves are all around us but we can't detect them, sense them, without a radio receiver. Similarly, we can't sense radioactivity without a radiation detector. But unlike common radio waves, nuclear radiation is not harmless to human beings and other living things. At very high levels, radiation can kill an animal or human being completely by killing masses of cells (细胞) in important organs (器官). But even the lowest levels can do serious damage. There is no level of radiation that is completely safe. If the radiation does not hit anything important, the damage may not be significant. This is the case when only a few cells are hit, and if they are killed completely. Your body will replace the dead cells with healthy ones. But if the few cells are only damaged, and if they reproduce themselves, you may be in trouble. They reproduce themselves in an unusual way. They can grow into cancer. Sometimes this does not show up for many years.
This is another reason for some of the mystery about nuclear radiation. Serious damage can be done without the knowledge of the person at the time that damage has occurred. A person can be irradiated(放射治疗) and feel fine, then die of cancer five, ten, or twenty years later as a result. Or a child can be born weak or easy to get serious illness as a result of radiation absorbed by its grandparents. Radiation can hurt us. We must know the truth.
1.According to the passage, the danger of nuclear power lies in __________.
A. nuclear mystery B. radiation detection
C. radiation level D. nuclear radiation
2.Radiation can lead to serious results even at the lowest level ________.
A. when it kills few cells
B. though the damaged cells can repair themselves
C. if it damages few cells
D. unless the damaged cells can reproduce themselves
3.Radiation can hurt us in the way that it can _____.
A. kill large numbers of cells in main organs so as to cause death immediately
B. damage cells which may grow into cancer years later
C. affect the healthy growth of our younger generation
D. lead to all of the above results
4.Which of the following can be best inferred from the passage?
A. The importance of protection from radiation cannot be overemphasized (过分强调).
B. The mystery about radiation remains unsolved.
C. Cancer is mainly caused by radiation.
D. Radiation can hurt those who do not know about its danger.
高二英语阅读理解中等难度题查看答案及解析
Nuclear power’s danger to health, safety, and even life itself can be summed up in one word: radiation.
Nuclear radiation has a certain mystery about it, partly because it cannot be detected by human senses. It can’t be seen or heard, or touched or tasted, even though it may be all around us. There are other things like that. For example, radio waves are all around us but we can’t detect them, sense them, without a radio receiver. Similarly, we can’t sense radioactivity without a radiation detector. But unlike common radio waves, nuclear radiation is not harmless to human beings and other living things.
At very high levels, radiation can kill an animal or human being immediately by killing masses of cells in vital organs. But even the lowest levels can do serious damage. There is no levels of radiation that is completely safe. If the radiation does not hit anything important, the damage may not be serious. This is the case when only a few cells are hit, and if they are killed immediately, your body will replace the dead cells with healthy ones. But if the few cells are only damaged, and if they reproduce themselves, you may be in trouble. They can grow into cancer. Sometimes this does not show up for many years.
This is another reason for some of the mystery about nuclear radiation. Serious damage can be done without the victim being aware at the time that damage has occurred. A person can be irradiated(辐射)and feel fine, then die for cancer five, ten, or twenty years later as a result. Or a child can be born weak as a result of radiation absorbed by its grandparents.
Radiation can hurt us. We must know the truth.
1.What is the main idea of the passage?
A. How to detect nuclear radiation.
B. How radiation kill a man.
C. The mystery about nuclear radiation.
D. Serious damage caused by nuclear radiation.
2.Which of the following statements is true?
A. Nuclear radiation can cause cancer to human beings.
B. Nuclear radiation can be safe to human beings if its level is low.
C. Nuclear radiation can be detected by human senses.
D. Nuclear radiation is just like common radio waves.
3.What is not the reason why nuclear radiation has a certain mystery?
A. The hurt cells can stay in the body many years and then grow into cancer.
B. It can do harm to a person while the victim isn't aware the damage has occurred.
C. Nuclear radiation can kill a person very easily.
D. Radiation can seldom kill a person immediately.
4.If a human being is hit by nuclear radiation, he may _______.
A. die of cancer after many years B. die immediately
C. have a child who may be born weak D. all of the above
高二英语阅读理解中等难度题查看答案及解析
Please don’t put so much _________ on our children. It is harmful to their health and future.
A.power B.strength C.pressure D.attention
高二英语单项填空简单题查看答案及解析
BERLIN — With the crisis in Japan raising fears about nuclear power, Germany and Switzerland said on Monday that they would reassess(再次评估) the safety of their own reactors([核] 反应堆).
Doris Leuthard, the Swiss energy minister, said Switzerland would put off plans to build nuclear plants. She said no new ones would be permitted until experts had reviewed safety standards.
Germany will put off “the recently decided extension of the running time of German nuclear plants,” Chancellor Angela Merkel told reporters. “This moratorium(延缓)will run for three months and it will allow for a thorough examination of the safety standards of the county’s 17 nuclear power plants.
The European Union called for a meeting on Tuesday of nuclear safety authorities to assess Europe’s preparedness.
Germany’s foreign minister, Guido Westerwelle, called for a new risk analysis of the country’s nuclear plants, particularly regarding their cooling systems. He is the leader of the Free Democratic Party, which strongly supports nuclear power.
A previous government, led by the Social Democrats, passed a law in 2001 to close all the country’s nuclear plants by 2021. But Mrs. Merkel’s government changed that decision last year to extend the lives of the plants by an average of 12 years.
In Switzerland, Doris Leuthard said she had already asked to analyze the exact cause of the problems in Japan and draw up new or tougher safety standards “particularly in terms of seismic(地震的,与地震相关的) safety and cooling.”
In Russia, the Prime Minister said his government would “draw conclusions from what’s going on in Japan.”
1. Where can you most likely read this passage?
A.In a newspaper. | B.In a magazine. | C.In a science report. | D.In a diary. |
2.How will Germany react to Japan’s nuclear crisis?
A.Germany will close all the country’s nuclear plants. |
B.Germany will hold a meeting of nuclear safety authorities. |
C.Germany will change the decision made last year. |
D.Germany will delay the extension of nuclear plants running time. |
3.The author mentions all the following EXCEPT ______.
A.The moratorium in Germany will give time to examine the nuclear plants safety standards. |
B.Switzerland will not build new nuclear plants unless they meet the experts’ safety standards. |
C.The Social Democrats in Germany shares the same view with the Free Democratic Party. |
D.Russia will try to learn something from the nuclear power crisis in Japan. |
4.What is the best title of the passage?
A.Watch Out for the Danger of Nuclear Power |
B.Europe Is against Building Nuclear Plants |
C.Nuclear Plants in Europe Are Delayed |
D.Opinions on Nuclear Power Are Opposite |
高二英语阅读理解中等难度题查看答案及解析
What will power your house in the future?Nuclear,wind,or solar power?According to scientists at the Massachusetts Institute of Technology (MIT) in the US,it might be leaves — but artificial (人造的) ones.
Natural leaves are able to change sunlight and water into energy. It is known as photosynthesis (光合作用).Now researchers have found a way to imitate this seemingly simple process.
The artificial leaf developed by Daniel Nocera and his colleagues at MIT can be seen as a special silicon chip with catalysts (催化剂).Similar to natural leaves,it can split water into hydrogen and oxygen when put into a bucket of water. The hydrogen and oxygen gases are then stored in a fuel cell,which uses those two materials to produce electricity,located either on top of a house or beside the house.
Though the leaf is only about the shape of a poker card,scientists claimed that it is promising to be an inexpensive source of electricity in developing countries. “One can imagine villages in India and Africa not long from now purchasing an affordable basic power system based on this technology,” said Nocera at a conference of the American Chemical Society.
The artificial leaf is not a new idea. The first artificial leaf was invented in 1997 but was too expensive and unstable for practical use. The new leaf,by contrast,is made of cheap materials,easy to use and highly stable. In laboratory studies,Nocera showed that an artificial leaf prototype (原型) could operate continuously for at least 45 hours without a drop in activity.
The wonderful improvements come from Nocera's recent discovery of several powerful,new and inexpensive catalysts. These catalysts make the energy transformation inside the leaf more efficient with water and sunlight. Right now,the new leaf is about 10 times more efficient at carrying out photosynthesis than a natural one. Besides,the device can run in whatever water is available;that is,it doesn't need pure water. This is important for some countries that don't have access to pure water.
With the goal to “make each home its own power station” and “give energy to the poor”,scientists believe that the new technology could be widely used in developing countries,especially in India and rural China.
1.Which of the following orders correctly shows how the artificial leaf is used to produce electricity?
a.artificial leaves split water into hydrogen and oxygen
b.the hydrogen and oxygen gases are stored in a fuel cell
c.the artificial leaves are put in water
d.the fuel cell uses hydrogen and oxygen to produce electricity
A.c,a,b,d B.c,b,a,d
C.b,c,a,d D.c,a,d,b
2.The purpose of the scientists at MIT in developing the new artificial leaf is to________.
A.build up more power stations in the world
B.provide cheaper energy for developing countries
C.offer people in developing countries access to pure water
D.gain a deeper understanding of the photosynthesis process
3.The main idea of this passage is ________.
A.an introduction to the history of artificial leaves
B.a mixture of water power and solar energy
C.giving energy to the poor
D.an invention copying photosynthesis
高二英语阅读理解中等难度题查看答案及解析
Many people believe sharks are dangerous and will always try to hurt or even kill humans. 1. .A shark exhibition at the National Aquarium(水族馆)in Baltimore,USA.proves this.Visitors can touch young sharks,see their eggs develop and watch a dozen different species swim smoothly around a huge tank.
Most people fail to realize that shark attacks do not happen very often.Humans are more likely to be killed by lightning than by a shark. 2. .There kids can learn, from an early age, not to fear sharks.
“People fear what they don’t know,”said Nancy Hotchkiss,an organizer of the exhibition.“Sharks have been around for 400 million years and play an important role in the ocean’s food chain.We want people to discover that sharks are amazing animals that need our respect and protection.” 3. . A study,published in January in the US magazine,Science,found that almost all recorded shark species have fallen by half in the past 8 to 15 years.
Thousands of sharks are hunted in Asia for special foods,and many others get caught in nets,while fishermen are hunting other fish. 4.
“Some fishing methods are actually cleaning out the ocean for sharks,”said Dave Schofield,the manager of the aquarium’s ocean health program. 5.
A.They can watch them develop inside their eggs and feel the skin of the older swimmers
B.In fact,94 percent of the world’s 400 species are harmless to humans
D. About 100 million sharks are killed every year around the world by humans.
C.It is a worrying situation but some areas have put measures in place to protect these special fish.
E.And to make this point clear,the museum has set up a special touching pool for children.
F.Sharks can smell and taste blood,and trace it back to its source
G. More than half of the sharks caught are smaller than l meter long.
高二英语信息匹配简单题查看答案及解析
Ebola is a dangerous virus that can cause people to get very sick and even die. The virus is causing the biggest problems in western Africa, where it has spread quickly.1. But it can get worse and cause life-threatening symptoms, such as bleeding and trouble breathing.
2.
Ebola does not spread like colds or the flu because it does not float through the air. Ebola also doesn’t spread through food or water, like some other viruses. Instead, Ebola spreads when someone touches the body fluids (such as spit) of a sick person.
3.
An outbreak is when many people are getting sick with the same illness around the same time. You may have heard of a flu outbreak, which is when lots of people get sick from the same types of flu virus. When an outbreak happens because of a virus, more people could get sick because there is a lot of that virus around.
Where did Ebola come from?
Scientists aren’t sure how the first person gets Ebola at the start of an outbreak. 4.Tropical animals in Africa believed to carry the virus include great apes, chimpanzees, gorillas, monkeys, fruit bats, porcupines, and forest antelope.
What do kids need to do about Ebola?
Ebola is making many people sick in Africa, but no matter where you live, it’s always a good idea to wash your hands well and often. 5.
A. Why do I need to wash my hands?
B. How do people catch Ebola?
C. Ebola symptoms can start with fever and headache, kind of like the flu.
D. But they think that people may pick up the virus by touching or eating infected animals.
E. It’s very important that infected people get treatment right away.
F. Keeping hands clean can help protect you from common illnesses like colds and the flu.
G. What is an outbreak?
高二英语七选五困难题查看答案及解析
Stop eating yourself stupid we all know that poor nutrition can lead to bad health and even weight gain. Now add “lack of intelligence” to the growing list. A recent study has found that what you eat could very likely play a role in how smart you are.
According to the study, rats fed a high-fat diet for 10 days showed signs of weakness and even had trouble finding food that was waiting for them. 1. Actually a high-fat diet could weaken our intelligence--but so can a low-calorie diet. The trick appears to lie in finding a nice balance.
Here are ways to achieve that happy balance and make you smarter through diet, exercise and improving your brain power.
Figure out how many calories you need to maintain your weight. __2.__ If you need to drop a few pounds, take away the number you get by 400 calories; consume that number of calories each day until you drop the weight.
__3.__Aim for healthy foods that include good amounts of protein, fiber, fruits and vegetables, healthy whole grains, healthy fats and plenty of water. Well! Remember: All work and no play makes Jack a dull boy. Read a book. Try a new recipe. Do some puzzles. __4.__
Exercise regularly with a positive attitude. Aim for at least three 30-minute training sessions a week(but more is better). I like simple exercise such as walking, but anything that raises the heart rate is good. _5._ Combine them! Some people like to listen to classical music such as Bach or Mozart, but rock music lovers will be happy to learn that this kind of music can help make them smarter as well.
A.You may be fond of music, too.
B.Your health depends on your exercise plan.
C.Aim to get this number of calories each day.
D.Don’t forget to exercise your mind while doing so.
E.You may be wondering what this has to do with us.
F.These are all good ways to help increase your intelligence.
G.Eat the right foods in addition to getting the right number of calories.
高二英语其他题中等难度题查看答案及解析