We’ve heard about radiation from the damaged nuclear reactors in Japan reaching American shores. Experts say so far there is no reason to worry, and point out that we meet radiation every day. Where and how? NPR’s Renee Montagne posed that question to Peter Caracappa, a radiation safety officer and professor of nuclear engineering.
MONTAGNE: How many things emit radiation?
Dr CARACAPPA: Well, radiation and radioactive material is a part of nature. So everything that’s living has some amount of radiation coming from it—a very small amout. Plus there’s radiation in the ground and the air.
So the extremes are uranium in the soil to bananas?
Yes.
By the way, why do bananas have radiation?
Bananas have a lot of potassium(钾). And a small amount of potassium naturally is called potassium 40, which is radioactive
What’s the difference between radiation that’s harmful and not harmful?
Well, the term radiation can apply to a lot of different things. But the harmful radiation is ionizing(离子)radiation. It has enough energy that it can make chemical changes in material. We could get ionizing radiation from an X-ray, for example. It’s the kind of radiation that causes cancer.
The broader definition of radiation includes a lot of things that we call non-ionizing radiation. That includes everything like radio waves and visible light and your microwave.
So what then is the largest contributor of ionizing radiation?
For the natural sources of ionizing radiation, actually the biggest chunk of that tends to come from radon(氡), which is a radioactive material that is present in the air. It can become a concern when it builds up in low-lying areas of homes like basements.
Would it be fair to say that most people do not need to worry about the danger of being exposed to radiation?
I would say that the everyday exposure to radioation that we meet contributes an extremely tiny risk to our life or to our health compared to all of the other risks that we meet in our day-to-day life.
1.We can infer from the first paragraph that radiation is______.
A.rare | B.powerful | C.dangerous | D.common |
2.The passage may be _______.
A.an interview | B.an argument | C.a talk show program | D.a science report |
3.Whether radiation is harmful or not depends on______.
A.whether it has a small amount of potassium |
B.whether it changes chemical in materials. |
C.whether it has energy to change materials |
D.whether it is visible in life |
4.The purpose of writing this passage is to _______.
A.advise on how to protect us from radiation |
B.analyze what causes radiation in daily life |
C.warn people of the danger of radiation |
D.expect people not to fear everyday radiation |
高一英语阅读理解困难题
We’ve heard about radiation from the damaged nuclear reactors in Japan reaching American shores. Experts say so far there is no reason to worry, and point out that we meet radiation every day. Where and how? NPR’s Renee Montagne posed that question to Peter Caracappa, a radiation safety officer and professor of nuclear engineering.
MONTAGNE: How many things emit radiation?
Dr CARACAPPA: Well, radiation and radioactive material is a part of nature. So everything that’s living has some amount of radiation coming from it—a very small amout. Plus there’s radiation in the ground and the air.
So the extremes are uranium in the soil to bananas?
Yes.
By the way, why do bananas have radiation?
Bananas have a lot of potassium(钾). And a small amount of potassium naturally is called potassium 40, which is radioactive
What’s the difference between radiation that’s harmful and not harmful?
Well, the term radiation can apply to a lot of different things. But the harmful radiation is ionizing(离子)radiation. It has enough energy that it can make chemical changes in material. We could get ionizing radiation from an X-ray, for example. It’s the kind of radiation that causes cancer.
The broader definition of radiation includes a lot of things that we call non-ionizing radiation. That includes everything like radio waves and visible light and your microwave.
So what then is the largest contributor of ionizing radiation?
For the natural sources of ionizing radiation, actually the biggest chunk of that tends to come from radon(氡), which is a radioactive material that is present in the air. It can become a concern when it builds up in low-lying areas of homes like basements.
Would it be fair to say that most people do not need to worry about the danger of being exposed to radiation?
I would say that the everyday exposure to radioation that we meet contributes an extremely tiny risk to our life or to our health compared to all of the other risks that we meet in our day-to-day life.
1.We can infer from the first paragraph that radiation is______.
A.rare | B.powerful | C.dangerous | D.common |
2.The passage may be _______.
A.an interview | B.an argument | C.a talk show program | D.a science report |
3.Whether radiation is harmful or not depends on______.
A.whether it has a small amount of potassium |
B.whether it changes chemical in materials. |
C.whether it has energy to change materials |
D.whether it is visible in life |
4.The purpose of writing this passage is to _______.
A.advise on how to protect us from radiation |
B.analyze what causes radiation in daily life |
C.warn people of the danger of radiation |
D.expect people not to fear everyday radiation |
高一英语阅读理解困难题查看答案及解析
They then heard a woman's voice coming from the damaged ship. _____the ship, they saw that a woman was trying to get out of the broken window.
A.Starting B.Parking C.Passing D.Approaching
高一英语单项填空中等难度题查看答案及解析
The deadly earthquake and tsunami (海啸) that struck Japan on March 11 damaged two nuclear power stations. Officials are now working to prevent dangerous radiation from poisoning the air in the area surrounding the Fukushima Daiichi plant. The Japanese government has ordered people living within 12 and a half miles of the plant to evacuate, and asked those living 12 and a half to 20 miles away to stay indoors.
Nuclear power plants create energy using a chemical reaction that produces large amounts of heat. Reactors(反应堆)in Japan have many long, thin rods, called fuel rods(棒), which must be kept cool.
If the reactor’s fuel rods aren’t cooled, the reaction can burn out of control. That’s what happened at the two Japanese plants after the quake caused a power failure and the cooling systems malfunctioned(发生故障). This overheating could cause radiation to escape and sicken many people.
Japan’s 54 nuclear reactors are built to withstand the many small or moderate earthquakes the country faces each year. But Friday’s earthquake was one of the most severe earthquakes ever recorded.
People exposed to unsafe levels of radiation have a higher than normal risk of getting cancer. The Japanese government has been distributing potassium iodide(碘化钾)pills to people in the surrounding areas to protect those who may have come in contact with radiation from the power plant. The pills flood the body with healthy potassium iodide. The potassium iodide works to crowd out “bad” iodine in the body that may have been poisoned by radiation.
On Tuesday morning, 750 workers left the Fukushima Daiichi plant. However, 50 workers stayed behind to use sweater to cool the fuel rods. These dedicated employees are risking their own lives to save many others.
On Thursday, officials used helicopters, fire trucks, and water cannons to spray water on the reactors to cool the fuel rods. But it’s not clear whether these efforts were successful. Officials are now working on a power line to restore electricity to the plant. They hope this will help restart the plant’s cooling system and stop the fuel rods from leaking radiation.
1.The underlined word “evacuate” in Paragraph 1 probably means ________.
A.help | B.rest | C.stop | D.leave |
2.What can we learn from the text?
A.The local people are scared and ready to run away. |
B.The earthquake led to many deaths and caused damage to roads. |
C.The Japanese government has found a kind of pill that can treat cancer. |
D.The two stations were damaged because their cooling systems didn’t work. |
3.In the last paragraph, the author mainly states ________.
A.lack of help |
B.international aids |
C.the government’s efforts |
D.the result of the disaster |
4.This text is most probably taken from ________.
A.a research paper |
B.a newspaper report |
C.a class presentation |
D.a chemistry textbook |
高一英语阅读理解中等难度题查看答案及解析
听下面一段独白,回答以下小题。
1.How did the speaker know about the cruise holiday?
A. He heard about it from his friend.
B. He saw it in an advertisement.
C. Ms. Lawrence told him about it.
2.What does the speaker plan to do during the cruise holiday?
A. Go to Spain. B. Visit every port. C. Go shopping.
3.What does the speaker care most about the cruise holiday?
A. The departure time. B. The cost. C. The activity.
4.How many people will go on the cruise holiday according to the speaker?
A. 4. B. 5. C. 3.
高一英语长对话或独白中等难度题查看答案及解析
The woman was about to open the door ______ she heard a strange sound from inside.
A. as B. while
C. when D. then
高一英语单项填空困难题查看答案及解析
Nuclear radiation(核辐射)has a certain mystery, 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 but we can’t detect them or 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 in important organs. 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 serious. This is the case when only a few cells are hit, and when 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. A child can be born weak or easy to get serious illness as a result of radiation absorbed by its grandparents.
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 trouble even at the lowest level __________.
A.when it kills a few cells |
B.if it damages a few cells |
C.though the damaged cells can repair themselves |
D.unless the damaged cells can reproduce themselves |
3.Radiation can hurt us so much that it can ___________.
A.kill large numbers of cells in main organs |
B.replace cells which may grow into cancer years later |
C.affect the healthy growth of our younger generation |
D.A and C |
4.Which of the following can be best inferred from the passage?
A.The importance of protection from radiation cannot be overemphasized(过度强调). |
B.The mystery about radiation has been solved. |
C.Cancer is only caused by radiation. |
D.Radiation can hurt those who do know about its danger. |
5.What would be the best title of the text?
A.Radiation Can Hurt Us. |
B.Radiation Is the Source of Cancer. |
C.Radiation Is a Subject Scientists Work on. |
D.Radiation Is a Mystery. |
高一英语阅读理解中等难度题查看答案及解析
The woman was about to open the door ____________ she heard a strange sound from inside.
A.as | B.while | C.when | D.then |
高一英语单项填空中等难度题查看答案及解析
The woman was about to open the door ____________ she heard a strange sound from inside.
A. as B. while C. when D. then
高一英语单项填空中等难度题查看答案及解析
—Have you heard of the North Korea’s nuclear test?
—Yes,________news came as________shock to me.
A.the;a B.the;the
C.a;a D.a;the
高一英语简单题查看答案及解析
—Have you heard of the North Korea’s nuclear test?
—Yes,________news came as ________shock to me.
A.the;a B.the;the C.a;a D.a;the
高一英语单项填空中等难度题查看答案及解析