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（輻射）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.
【小題1】Which of the following statements is true?
| A．Nuclear radiation is just like common radio waves. |
| B．Nuclear radiation can cause cancer to human beings. |
| C．Nuclear radiation can be detected by human senses. |
| D．Nuclear radiation can be safe to human beings if its level is low. |
| A．By damaging its heart. | B．By killing a few cells. |
| C．By hitting any place in its body. | D．By killing many cells in important organs. |
| A．die of cancer after many years | B．die immediately |
| C．have a child who may be born weak | D．a(chǎn)ll of the above |
【小題1】B
【小題2】D
【小題3】D
解析試題分析：文章介紹核輻射對人類和動物的危害，如果輻射較弱，可能會危害健康，有的影響不是明顯的，但是人們可能多年后會死于癌癥，或會對后代產(chǎn)生影響，如果核輻射量大，對導致死亡。
【小題1】細節(jié)題：從第三段的句子：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.可知核輻射會導致人類的癌癥，選B。
【小題2】細節(jié)題：從第三段的句子：At very high levels, radiation can kill an animal or human being immediately by killing masses of cells in vital organs. 可知核輻射可以殺死重要器官的細胞從而使動物立刻死亡，選D
【小題3】細節(jié)題：從第一段可知核輻射可以致人死亡，最后一段可知核輻射可以讓人多年后死于癌癥，也會生出虛弱的孩子，所以選D
考點：考查健康類短文
名校課堂系列答案科目：高中英語 來源： 題型：閱讀理解
Losing weight comes with a lot of health benefits—including making your brain sharper.
Yes, it turns out that overweight may damage cognitive functions (認知功能) such as memory and attention. There have been few studies of overweight and cognitive functioning, possibly because it is generally believed that it is not a primary risk cause for poor cognitive performance. Losing weight, therefore, may help improve these mental functions, according to a new research led by John Gunstad, assistant professor of psychology at Kent State University.
Growing evidence suggests that being fat is linked to cognitive deficits (缺陷). So Gunstad and his team guessed that losing weight might improve mental function. For their study, they measured memory and attention in a group of 150 overweight participants, some of whom had some kind of operation for weight loss and some did not. All of the volunteers completed mental skills tests to assess their abilities of memory and attention at the beginning of the study, and again 12 weeks later. To begin with, about 24% of the patients showed damaged learning and 23% showed signs of poor memory when tested. At the end of the study, those who had lost weight after operation improved their scores into the average or above average range for cognitive functions. Scores for the volunteers who didn’t lose weight dropped even further.
The study helped Gunstad to find out whether losing weight had any effect on mental function. Now that he’s seen the positive effect that weight loss can have on memory and attention, he says he will next study those who choose to lose weight by the traditional way—eating healthier and getting more active. He expects that losing weight in this way will have a similarly positive effect on the brain. “If we can improve the condition with operations, then we can probably produce the same change with behavioral weight loss as well,” he says.
【小題1】There is less research on overweight and cognitive functions because researchers _____.
| A．believe overweight only affects our body |
| B．have focused on ways to sharpen people’s mind |
| C．do not consider overweight a main cause for low cognitive ability |
| D．a(chǎn)re clear about the relation between weight and mental functions |
| A．losing weight has little effect on people’s memory |
| B．losing weight can improve people’s mental functions |
| C．overweight people are likely to have psychology problems |
| D．overweight people’s abilities of concentration differ greatly |
| A．Slim people are smarter than overweight people. |
| B．Healthy diet is better than exercise in losing weight. |
| C．Traditional ways of losing weight are better than operation. |
| D．Overweight people will get smarter by taking more exercise. |
| A．Body Weight and Health |
| B．Losing Weight by Operation |
| C．Ways to Improve Mental Functions |
| D．Losing Weight to S harpen Your MindD |
查看答案和解析>>
科目：高中英語 來源： 題型：閱讀理解
October 15th is Global Handwashing Day．Activities are planned in more than twenty countries to get millions of people in the developing world to wash their hands with soap．
Experts say people around the world wash their hands but very few use soap at so-called critical moments．These include after using the toilet, after cleaning a baby and before touching food．
Global Handwashing Day is the idea of the Public-private Partnership for handwashing with soap．The goal, they say, is to create a culture of handwashing with soap．The organizers say all soaps are equally effective at removing disease-causing germs．They say the correct way to wash is to wet your hands with a small amount of water and cover them with soap．Rub it into all areas, including under the fingernails．Then, wash well under running water．Finally, dry your hands with a clean cloth．
The Partnership says soap is important because it increases the time that people spend washing．Soap also helps to break up the dirt that holds most of the germs．And it usually leaves a pleasant smell, which increases the chances that people will wash again．
It also says that washing hands with soap before eating and after using the toilet could save more lives than any medicine．It could help reduce cases of diarrhea, which is the second leading cause of child deaths, killing more than one and a half million children a year, by almost half．
【小題1】What does the author intend to tell us in the passage?
| A．To keep healthy by washing hands． | B．To wash hands with soap． |
| C．To take action to wash hands． | D．To wash hands often． |
| A．a(chǎn)--c--b--e--d | B．e--d--a--b—c |
| C．a(chǎn)--c--b--d--e | D．e--b--d--a--c |
| A．It gives people a longer handwashing time． |
| B．It helps to remove a lot of germs from hands． |
| C．It attracts people to do more handwashing． |
| D．It gets all people into the habit of washing hands． |
| A．kills half of the kids in the developing countries a year |
| B．causes the greatest number of child deaths |
| C．can be prevented to some degree by washing hands with soap |
| D．can’t be cured without washing hands |
查看答案和解析>>
科目：高中英語 來源： 題型：閱讀理解
The Healthy Habits Survey shows that only about one third of American seniors(年長者) have correct habits. Here are some findings and expert advice.
1.How many times did you brush your teeth yesterday?
·Finding：About 33% of seniors brush their teeth only once a day.
·Step：Remove the 300 kinds of bacteria in your mouth each morning with a battery-operated toothbrush. Brush gently for 2 minutes, at least twice a day.
2.How many times did you wash your hands or bathe yesterday?
·Finding：Seniors, on average, bathe fewer than 3 days a week. And nearly 30% wash their hands only 4 times a day—half of the number that doctors advise.
·Step：We touch our faces around 3,000 times a day-often inviting germs（病菌）to enter our mouth, nose, and eyes. Use toilet paper to avoid touching the door handle. And, most important, wash your hands often with hot running water and soap for 20 seconds.
3. How often do you think about fighting germs?
·Finding：Seniors are not fighting germs as well as they should.
·Step：Be aware of germs. Do you know it is not your toilet but your kitchen sponge（海綿）that can carry more germs than anything else? To kill these germs, keep your sponge in the microwave for 10 seconds.
【小題1】What is found out about American seniors?
| A．Most of them have good habits. |
| B．Nearly 30% of them bathe three days a week . |
| C．All of them are fighting germs better than expected . |
| D．About one third of them brush their teeth only once a day |
| A．twice a day | B．three times a day |
| C．four times a day | D．eight times a day |
| A．We should stop touching our faces. |
| B．A kitchen sponge can carry more germs than a toilet. |
| C．There are less than 300 kinds of bacteria in the mouth. |
| D．We should wash our hands before touching a door handle. |
查看答案和解析>>
科目：高中英語 來源： 題型：閱讀理解
Imagine you are doing this reading in this text on the computer; what else are you doing? Maybe you’re eating a sandwich or drinking a cup of Starbucks. Should you eat while reading?
There aren’t many believable numbers, but we do know the number of people who eat while sitting in front of some type of screen is growing. A recent study found that 33 percent of families always have the TV on during meal times and another 27 percent people have it on at least half the time. Another 10 percent may be texting, emailing or talking on a cell phone while eating.
Any type of these behaviors is bad, considering the following evidence:
A Canadian study found that children who watch more than three hours of cartoons a day are 50 percent more likely to be fat than children who watch fewer than two hours. The researchers concluded that more than 60 percent of overweight incidents can be connected with screen watching too much.
A three-week study found that adults who usually play with smartphones less burned 119 more calories per day.
One Chicago researcher found that people eat more potato chips while reading online than when they have the laptop turned off.
There has been very little investigation(調(diào)查) into eating with your eyes staring at a screen or reading a book, but it is likely that his mindless eating is related to weight gain. Simply speaking, your brain has no idea what is going on with your mouth because it is occupied by other things. You don’t notice how full your stomach is, and you often don’t even notice the taste or the act of chewing and swallowing, as a result of which, developing an adapted dietary habit is a must.
【小題1】The author answers the question raised in the first paragraph with ________.
| A．stories and explanations |
| B．examples and investigations |
| C．a(chǎn)n argument and evidence |
| D．facts and descriptions |
| A．Being focused while eating is a good way to have a good figure. |
| B．Adults’ weight is not affected by their eating habits. |
| C．There exist many investigations into eating while reading. |
| D．This text must be found on a website. |
| A．How Should You Lose Weight? |
| B．Should You Do Other Things While Eating? |
| C．Healthy and Unhealthy Eating Habits |
| D．TV and Eating |
| A．Express healthy eating ways. |
| B．Give more useful investigations into eating. |
| C．Describe the study about the old who watch less TV while eating. |
| D．Tell the proper ways to watch TV. |
查看答案和解析>>
科目：高中英語 來源： 題型：閱讀理解
Europe’s deadly outbreak of a rare form of E. coli bacteria (大腸桿菌) has brought new attention to food safety issues. One of the problems when people get sick from food is that the simplest question is often difficult or even impossible to answer. Just what did the people eat that made them sick?
Of course, one way to avoid these medical mysteries is to keep dangerous organisms out of the food supply. This is easier said than done, but scientists keep looking for new ways.
Scientists in the United States have developed an experimental system that uses a high-tech optical scanner. The system is designed to identify the presence of contaminants(致污物) like soil or animal waste on fresh produce. These can be sources of E. coli. E. coli bacteria naturally live in the intestines(腸) of humans and many animals. Most kinds of E. coli are harmless but some can make people sick.
The new scanner can also show damage and imperfections that might make the produce unappealing to shoppers.
Scientists designed the system at a Department of Agriculture research center in Beltsville, Maryland. Moon Kim of the Agricultural Research Service led the team.
MOON KIM: “We were requested, we were asked, to develop a method to detect contamination in produce. So we started with the apple as the model sample.”
The scanner uses a high-speed camera placed over the conveyer belt that moves the produce along. As the apples move along the belt, the scanner captures images of each piece of fruit.
Moon Kim says the team hopes the system will be available before long.
MOON KIM: “We are targeting for development in commercial plants for the next several years.”
The scanner can direct a sorting machine to separate the bad apples from the good ones. The system is currently able to show the surface of only half the apple as it speeds by. The inventers hope to improve the process so it can show the whole surface.
【小題1】What is the main topic of the text?
| A．Bacteria. | B．A high-tech scanner. |
| C．A camera | D．Food safety. |
| A．broke out all over the world | B．comes from soil or animal waste |
| C．is extremely harmful to health | D．does not cause illness |
| A．can help to sort out different fruits |
| B．make the produce appeal to shoppers |
| C．can only capture images of the whole apple |
| D．can identify the presence of contaminants |
| A．The scanner needs to be improved. |
| B．The scanner will be available in the next several years. |
| C．Moon Kim is unwilling to develop the scanner. |
| D．The scanner is connected to a sorting machine. |
查看答案和解析>>
科目：高中英語 來源： 題型：閱讀理解
Studies show that children who eat breakfast do better in school. It doesn’t take much further thought to know that adults will feel better and do better at work as well. Whether you work at home, on the farm, at the office, at school, or on the road, it is not a good idea to have no breakfast.
If we have no breakfast, we are likely to become tired when our brains and bodies run low on fuel (食物). By mid-morning, a lot of us grab a cup of coffee or eat a sugary candy bar to wake up again. This might work for a few minutes, but by lunch time we are hungry. Eating a good breakfast sets the tone for the rest of the day.
Having no breakfast is a popular way to lose weight, but not a smart one. Many people believe that they will lose weight if they have no meals, but that just isn’t true; the body expects to be refueled a few times a day, starting with a healthy breakfast. Eating breakfast is good for losing weight. In fact, people who eat breakfast are more likely to keep a healthy weight.
A healthy breakfast should have some protein (蛋白質(zhì)) and some fiber (纖維). Protein can come from low fat meats, eggs, or beans. Fiber can be found in whole grains, vegetables and fruits. A good example of a healthy breakfast might be something simple like a hard boiled egg, an orange, and a bowl of whole grain cereal with low fat milk. Stay away from sugary foods and white bread because they are digested (消化) quickly and will leave you hungry and tired in several hours. Protein and fiber will keep you feeling full until lunch time.
【小題1】The first paragraph mainly tells us that ______.
| A．it is necessary to have a good breakfast every day |
| B．many adults are too busy to have breakfast every day |
| C．many adults go to work without having breakfast |
| D．many children go to school without breakfast |
| A．we need to have a cup of coffee | B．we don’t have a good breakfast |
| C．our brains don’t work any longer | D．we don’t have enough sleep at night |
| A．Having a good breakfast can help you to finish your work. |
| B．Eating a good breakfast is enough for the whole day. |
| C．Breakfast is really the most important meal in a day. |
| D．You will be happier if you have a good breakfast. |
| A．it is healthy only to have beans and eggs for your breakfast |
| B．you mustn’t have meat for your breakfast |
| C．you should eat sugary foods if you feel hungry |
| D．you should eat something which has protein and fiber for breakfast |
查看答案和解析>>
科目：高中英語 來源： 題型：閱讀理解
Will it matter if you don't take your breakfast? Recently a test was given in the United States. Those tested included people of different ages, from 12 to 83. During the experiment, these people were given all kinds of breakfasts, and sometimes they got no breakfast at all. Special tests were set up to see how well their bodies worked when they had eaten a certain kind of breakfast. The results show that if a person eats a proper breakfast, he or she will work with better effect than if he or she has no breakfast. This fact appears to be especially true if a person works with his brains. If a student eats fruit, eggs, bread and milk before going to school, he will learn more quickly and listen with more attention to class.
Opposite to what many people believe, if you don't eat breakfast, you will not lose weight. This is because people become so hungry at noon that they eat too much for lunch, and end up gaining weight instead of losing. You will probably lose more weight if you reduce your other meals.
【小題1】During the test, those who were tested were given ________.
| A．no breakfast at all | B．very rich breakfast |
| C．little food for breakfast | D．different breakfast or none |
| A．he will fall ill |
| B．he will fail to listen to his teacher |
| C．he will not make progress in his studies |
| D．his mind will work more slowly |
| A．breakfast has great effect on work and studies |
| B．breakfast has little to do with a person’s work |
| C．a(chǎn) person will work better if he has a simple breakfast |
| D．those working with brains should have much for breakfast |
| A．Poor breakfasts affect those who work with brains. |
| B．Morning diet may cause one to get fatter. |
| C．Reducing lunch and supper is of less value in weight losing. |
| D．Eating less in lunch and supper may help to lose weight. |
查看答案和解析>>
科目：高中英語 來源： 題型：閱讀理解
Cancer researchers urged people on Wednesday to take more vitamin D to lower risk of cancer, saying studies showed a clear link. “Our suggestion is for people to increase their intake (吸入，攝入), through diet or a vitamin supplement,” Dr. Cedric Garland said in a telephone interview.
Garland's research team reviewed 63 studies, including several large long-term ones, on the relationship between vitamin D and certain types of cancer worldwide between 1966 and 2004. “There's nothing that has this ability to prevent cancer,” he said, urging governments and public health officials to do more to fortify (增強) foods with vitamin D. Garland is part of a University of California at San Diego Moores Cancer Center team that published its findings this week online in the American Journal of Public Health. Vitamin D is found in milk, as well as in some fortified orange juice, yogurt and cheeses, usually at around 100 international units（IU）a serving. “People might want to consider a vitamin supplement to raise their intake to 1000 IUs per day” Garland said, adding that it was well within the safety guidelines established by the National Academy of Sciences.
The authors said that taking more vitamin D could be especially important for people living in northern areas, which receive less vitamin D from sunshine.
“African Americans, who don't produce as much of the vitamin because of their skin colour, could also benefit significantly from a higher intake,” the authors said.
【小題1】According to the passage, people are advised to take more Vitamin D, because__.
| A．it is nutritious | B．it can’t harm people’s health |
| C．it can lower cancer risk | D．it is not taken enough every day |
| A．Have some sunshine | B．Have more meat |
| C．Have more fortified cheese | D．Have a vitamin supplement |
| A．A health researcher | B．A doctor |
| C．A scientist | D．A public health official |
| A．Milk | B．Fortified orange juice |
| C．Fortified yogurt | D．All of the above |
| A．Asian people | B．African people |
| C．American people | D．European people |
查看答案和解析>>
湖北省互聯(lián)網(wǎng)違法和不良信息舉報平臺 | 網(wǎng)上有害信息舉報專區(qū) | 電信詐騙舉報專區(qū) | 涉歷史虛無主義有害信息舉報專區(qū) | 涉企侵權(quán)舉報專區(qū)
違法和不良信息舉報電話：027-86699610 舉報郵箱：58377363@163.com