Holding a cell phone against your ear or storing it in your pocket may be dangerous to your health. This explains a warning that cell phone manufacturers include in the small print that is often ignored when a new phone is purchased. Apple, for example, doesn’t want iPhones to come closer to you than 1.5 centimeters; Research In Motion, BlackBerry’s manufacturer, recommends 2.5 centimeters.
If health issues arise from cell phone use, the possible effects are huge. Voice calls - Americans chat on cell phones 2.26 trillion(萬億)minutes annually - earn $109 billion for the wireless carriers.
Devra Davis, an expert who has worked for the University of Pittsburgh, has published a book about cell phone radiation, “Disconnect.” The book surveys scientific research and concludes the question is not settled.
Brain cancer is a concern that Ms. Davis examines. Over all, there has not been an increase in its incidence since cell phones arrived. But the average masks an increase in brain cancer in the 20-to-29 age group and a drop for the older population.
“Most cancers have multiple causes,” she says, but she points to laboratory research that suggests low-energy radiation could damage cells that could possibly lead to cancer.
Children are more vulnerable（易受傷的）to radiation than adults, Ms. Davis and other scientists point out. Radiation that penetrates only five centimeters into the brain of an adult will reach much deeper into the brains of children because their skulls are thinner and their brains contain more absorptive fluid（易吸收的液體）. No studies have yet been completed on cell phone radiation and children, she says.
Henry Lai, a research professor in the bioengineering department at the University of Washington, began laboratory radiation studies in 1980 and found that rats exposed to radiation had damaged DNA in their brains.
Ms. Davis recommends using wired headsets or the phone’s speaker. Children should text rather than call, she said, and pregnant women should keep phones away from the abdomen（腹部）.
小題1:According to Ms Davis, brain cancer increase ____.
A．a(chǎn)mong childrenB．a(chǎn)mong old people
C．in the twentiesD．a(chǎn)mong pregnant women
小題2:Why do children easily be affected by radiation?
A．Because they haven’t grown up.
B．Because they are too young to protect themselves.
C．Because they use cell phones more often than adults.
D．Because their skulls are thinner and their brains are easily hurt.
小題3:What can we conclude from the last paragraph?
A．Pregnant women should keep cell phones away.
B．People should use cell phones in the correct way.
C．If you are a child, you’d better text than make phone calls.
D．When you use a cell phone, use a wired headset or the phone’s speaker.
小題4:What does the passage mainly talk about?
A．Be careful when using cell phones.
B．Don’t hold your cell phone against your ear.
C．Rats exposed to radiation have damaged DNA in their brains.
D．Low-energy radiation could damage cells that could lead to cancer.

小題1:C
小題2:D
小題3:B
小題4:A

試題分析：本文講述的是使用手機會帶來輻射的負(fù)影響，因此需要正確使用手機。
小題1: C. 細(xì)節(jié)理解題。根據(jù)第四段“But the average masks an increase in brain cancer in the 20-to-29 age group and a drop for the older population”可腦癌主要發(fā)生在20多歲的時候，故選C項。
小題2: D. 細(xì)節(jié)理解題。根據(jù)“Radiation that penetrates only five centimeters into the brain of an adult will reach much deeper into the brains of children because their skulls are thinner and their brains contain more absorptive fluid（易吸收的液體）”可知，小孩更容易受輻射的影響是因為他們的頭骨更薄，大腦更容易受傷，故選D項。
小題3: B. 推理判斷題。最后一段“Ms. Davis recommends using wired headsets or the phone’s speaker. Children should text rather than call, she said, and pregnant women should keep phones away from the abdomen”所講述的都是一些正確使用手機以防止輻射的影響的方法，由此判斷選B項。
小題4:A. 主旨大意題。本文主要介紹使用手機的負(fù)作用，最后警示人們要正確使用手機。因此A項更能說明全文的主旨，而其它三項只是文中的細(xì)節(jié)內(nèi)容，故選A項。
點評：本文講述的是使用手機會帶來輻射的負(fù)影響，因此需要正確使用手機。文章基本上是考查細(xì)節(jié)題，對此類題型考生可以首先從問題中找到關(guān)鍵詞，然后以此為線索，運用略讀及查閱的技巧在文中迅速尋找這一細(xì)節(jié)，找到后再把這一部分內(nèi)容仔細(xì)閱讀一遍，仔細(xì)比較所給選項與文中細(xì)節(jié)的細(xì)微區(qū)別，在準(zhǔn)確理解細(xì)節(jié)的前提下，最后確定最佳答案。
練習(xí)冊系列答案
相關(guān)習(xí)題

科目：高中英語 來源：不詳 題型：閱讀理解

Health experts are calling for action to increase cancer care and control in the developing world. A medical research paper says cancer was once thought of as a problem mostly in the developed world. But now cancer is a leading cause of death and disability in poor countries as well. Experts from Harvard University and other organizations urge the international community to fight cancer actively, saying it should be fought in the way HIV/AIDS has been fought in Africa.
Cancer kills more than 7.5 million people a year worldwide. Almost two-thirds are in low-income and middle-income countries.
They discover cancer kills more people in developing countries than AIDS, tuberculosis (肺結(jié)核) and malaria (瘧疾) combined. But the world spends only 5% of its cancer resources in those countries.
Felicia Knaul from Harvard Medical School was one of the writers of the paper. She was in Mexico when she was found to have breast cancer. She received treatment there and her experience showed her the sharp difference between the rich and the poor in treating breast cancer.
Felicia Knaul says, “And we are seeing how this is attacking young women. It’s the number two cause of death in Mexico for women thirty to fifty-four. All over the developing world, it’s the number one cancer-related death among young women. I think we have to again say that there is much more we could do about it than we are doing about it.”
Professor Knalul met community health workers during her work in developing countries. They were an important part of efforts to reduce deaths from the cancer. They were able to persuade people to get tested to prevent the illness. The experts say cancer care does not have to be costly. For example, patients can be treated with lower-cost drugs.
小題1:What would be the best title for the passage?
A．Cancer – a leading cause of death in poor countries
B．What should we do in preventing and treating cancer?
C．What makes the first killer in developing countries?
D．Experts urge more efforts to fight cancer.
小題2:Felicia Knaul’s experience in Mexico shows that       .
A．many Mexican women suffer from breast cancer
B．there is not enough medicine for cancer there
C．many Mexican women can’t afford medical care
D．patients with breast cancer are treated differently
小題3:From what Felicia Knaul says, we can draw the conclusion that       .
A．breast cancer is a great threat to young women
B．people don’t pay enough attention to breast cancer
C．breast cancer is the second killer among women in Mexico
D．patients can be treated effectively in developing countries
小題4:Who plays an important part in preventing the cancer in developing countries?
A．The cancer patients. B．The health experts.
C．Community health workers.D．Young women.
小題5:Which of the following is TRUE according to the passage?
A．The number of cancer cases is decreasing.
B．HIV/AIDS is not being taken seriously in Africa.
C．Over 7.5 million people die of cancer every year.
D．It is very expensive to treat cancer.

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

Driving a car is not just handling controls and judging speed and distance. It requires you to predict what other road users will do and get ready to react to something unexpected , When alcohol is consumed, it enters your bloodstream and acts as a depressant (抑制藥)，damaging eyesight, judgment and co-ordination (協(xié)調(diào))，slowing down reaction time and greatly increasing the risk of accidents. Even below the drink driving link , driving will be affected.
Alcohol may take a few minutes to be absorbed into the bloodstream and start action on the brain. Absorption rate is increased when drinking on an empty stomach or when consuming drinks mixed with fruit juice. To get rid of alcohol from the body is a very slow process and it is not possible to speed it up with any measures like taking a shower or having a cup of tea or coffee.
The present Road Traffic Ordinance states clearly that the limit of alcohol concentration (濃度) is:
● 50 milligrams of alcohol per 100ml of blood ;or
● 22 micrograms of alcohol per 100ml of breath ;or
● 67 milligrams of alcohol per 100ml of urine(尿液)
Drivers who cause traffic accidents, or who commit a moving traffic offence(罪) or are being suspected of drink driving will be tested.
Any drive found drinking beyond the limit will be charged. The driver declared guilty may be fined a maximum of HK﹩25,000 and be sentenced to up to 3 years in prison and punished for 10 driving-offence points; or temporarily banned from driving.
The same punishment applies to failing to provide specimens (樣本) for breath, blood or urine tests without good excuse.
Drink driving is a criminal offence. Be a responsible driver, think before you drink. For the safety of yourself and other road users, never drive after consuming alcohol.
小題1:The first paragraph is mainly about_____________.
A．the introductions of driving skillsB．the damage of drinking to your body
C．the effect of drinking on drivingD．the process of alcohol being absorbed
小題2: The underlined word “it” in the second paragraph refers to “________”.
A．a(chǎn)lcoholB．a(chǎn)bsorptionC．bloodD．process
小題3:Which of the following is TRUE according to the passage?
A．Drinking below the drink driving limit has no effect on driving
B．Alcohol is taken in more quickly when drunk with fruit juice.
C．Having a cup of tea helps to get rid of alcohol from the body.
D．50 milligrams of alcohol per 100ml of breath is below the drink limit
小題4:A driver suspected of drink driving_________.
A．should provide specimens for testing.
B．will be forbidden to drive for 3 years
C．will be punished for 10 driving-offence points
D．should pay a maximum fine of HK＄25,000

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

It is common to have difficulties sleeping during the day. Humans are naturally wired to sleep best at night and be awake during the day. However, modern work schedules require some people to try to accommodate the unnatural schedule of shift（輪班）work — being awake at night and sleeping during the day.
In order to make this adjustment, you need to pay special attention to your sleep environment and your preparation for sleep. If shift work is a necessary part of your work life, here are some suggestions that may help.
Arrange to sleep uninterrupted in a quiet, dark room. This means you may have to turn off or unplug your phone, hang darkening curtains on the windows or wear a sleep eye mask, and train your family and friends to leave you alone while you sleep.
Fit in a nap（小睡）. When your daytime sleep period is too short, taking a short nap of less than 30 minutes just before work or on a break has been shown to improve alertness and enhance performance.
Develop and follow a sleep routine. It's best if you go to sleep and wake up at the same time every day. Try not to vary this too much on weekends. Your body likes routine.
Take extra care to make healthy choices. You may be tempted to reach for unhealthy foods or nicotine to stay awake or alcohol to try to sleep. But ultimately these choices are more harmful than helpful.
If you have tried all these things and are still having problems getting enough quality sleep during the day, talk to your doctor or a sleep specialist. Sometimes medications（藥物治療）may be helpful and safe. In other cases, there may be an underlying sleep disorder that needs to be addressed.
小題1:The purpose of the text is to     .
A．persuade workers to have a god sleep.
B．a(chǎn)dvise night workers to keep healthy
C．encourage workers to do day work
D．help night workers to sleep well
小題2:What does the author recomusend?
A．A suitable account of alcohol to help sleep.
B．A regular life on weekday’s and weekends.
C．A dark room without phoebes to sleep in.
D．A break for sleeping anytime during the day.
小題3:On which condition should a person turn to a sleep specialist for help?
A．If he suffers from a sleep disorder for the first time.
B．If a good sleep environment is greatly needed for him.
C．If he falls to get quality sleep through his own efforts.
D．If he has the problem of bailing to sleep in the daytime.
小題4:We can learn from the test that       .
A．night workers need a long time to fall asleep
B．constant breaks at work help to improve performance
C．it is difficult to create a good sleep environment
D．night work requires people to adjust their body clocks

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

If you think American cooking means opening a package and throwing the contents into the microwave oven (微波爐), think again. On the one hand, it’s true that many Americans have cold cereal for breakfast, sandwiches for lunch and instant (方便的) dinners. From busy homemakers to working people, many Americans enjoy the convenience (方便) of fast food that can be ready to serve in 10 minutes or less. On the other hand, many Americans realize the importance of cooking skills. Parents — especially mothers — see the importance of training their children — especially daughters. Most Americans think that there’s nothing better than a good home-cooked meal. But with cooking, as with any other skill, good results don’t happen by accident.
Probably every cook has his or her own way of cooking. But there are some basic skills that most people follow. For example, baking is a main method (方法) of preparing food in America. For that reason, Americans would find it next to impossible to live without an oven. American cooks pay special attention to the balance of foods, too. In planning a big meal they try to include meat, a few vegetables, some bread and often a dessert. They also like to make sure the meal is colorful. Having several different colors of food on the plate usually makes for a healthy meal.
For those who need guidance in their cooking, or for those who have just run out of ideas, recipes are a great help. Recipes list all the ingredients for a dish (generally in the order used), the amount of each to use, and a description of how to put them together.
小題1:This passage mainly tells us that ______.
A．Americans like to have several different colors of food on the plate
B．without an oven, Americans find it impossible to live conveniently
C．Americans pay special attention to recipes and nutritious meals
D．Americans usually have fast food, but they pay special attention to cooking as well
小題2:Many Americans have cold cereal for breakfast, sandwiches for lunch and instant dinner because ______.
A．they like instant food very much
B．they don’t like cooking at all
C．most American working people are busy and don’t have time to cook
D．fast food is delicious and it usually contains a lot of vitamins
小題3:By saying “But with cooking, as with any other skill, good results don’t happen by accident”, the author means ______.
A．good cooking doesn’t come easily; it needs a lot of practice
B．just like any other skill, cooking may bring good results
C．cooking comes from one’s gift, not through practice
D．cooking can lead to accidents
小題4:From the passage, we know that ______.
A．Americans don’t care about food
B．Americans are not good at cooking because they like to use recipes
C．a(chǎn)n oven plays an important role in cooking for Americans
D．while cooking, Americans usually run out of ideas

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

The World Health Organization recently reported that the number of cases of tuberculosis(TB) has been abating since 2006 . Also, fewer people are dying from TB. But a study by researchers at the University of California, San Francisco, says smoking could threaten this progress.
Nearly twenty percent of all people use tobacco, and millions of non-smokers get sick from breathing the smoke. The new study predicts that smoking will produce an additional thirty-four million TB deaths by 2024.
Efforts to control the spread of TB have mainly focused on finding and treating infections. Fewer efforts have been made to understand the causes. Dr Anthony Fauci is the director of the United States National Institute of Allergy and Infectious diseases. He said, “Despite our control efforts, we still have more than a million people each year dying from TB and millions of people  getting infected; we realize it’s still a very important problem. So we have to do the practical thing and we have to do the fundamental research things at the same time. ”
Smoking does not cause TB; bacteria cause the infection. But the study says smoking affects the nervous system in a way that makes an inactive case of TB more likely to develop into an active one. Stanton Glantz is the director of the University of California’s Centre for Tobacco Control Research and Education and an author of the new study. He says it shows that TB cannot be controlled unless tobacco use is controlled.  He said, “It increases the number of people who will get TB by about seven percent.”
The study is described as the first to identify a direct link between tobacco use and rates of TB infection and death. Professor Glantz says the results should guide those creating health policies and TB control efforts. He said, “If you want to control the infectious disease of TB, you have to control the tobacco industry and the tobacco industry’s efforts to increase tobacco use, particularly in developing countries where TB is a big problem.”
小題1:What would be the beat title for this passage?
A．Scientists try to find the causes of TB deaths.
B．Study shows smoking is harmful to our health.
C．Study links smoking to millions of TB deaths.
D．Scientists pay more attention to TB deaths than before.
小題2:What does the underlined word “abating” in Paragraph 1 mean?
A．RespondingB．Surviving.C．Rising.D．Falling.
小題3: What would Dr Anthony Fauci probably agree with?
A．More efforts are needed to find the causes of TB infections.
B．TB infections are no longer a serious problem.
C．Few efforts have been put into the work of treating TB infections.
D．The practical and the fundamental research cannot be done together at present.
小題4:It is implied in the passage that ____________.
A．it is not very hard to control TB
B．smoking indirectly leads to TB
C．a(chǎn)n inactive case of TB is deadly
D．people cannot blame smoking for TB

查看答案和解析>>

科目：高中英語 來源：不詳 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.
小題2:E. coli bacteria ______.
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
小題3:The high-tech scanner ______.
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
小題4:What can be inferred from the text?
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：不詳 題型：閱讀理解

A
Car needs gas to run as your body needs food to work for you. Eating the right kinds of food is very important. A good eating habit can help your body grow strong if you take care of what you eat.
There are four main food groups altogether. The dairy group has food like milk, cheese and sour milk. The other three groups are the meat and fish group, the fruit and vegetable group, and the bread and rice group. Each meal should have at least one food from all four main groups. With all of these foods together, you will be given enough energy during the day.
It is easy to get into bad eating habits. You may eat your breakfast in a hurry to get to school on time or you may not have time for a good lunch. It may be easier to eat fish and chips for your supper all the time. But you will find yourself tired and you will not be able to think quickly.
Watching what you eat will help keep your body healthy and strong. It is also good to take some exercise. It will help you eat more if you take a walk or play games in the open air. Having good eating habits with some exercise is the key to your health.
小題1:According to the passage, which of the following diets do you think is the best one?
A．Eggs, tomatoes and chicken.
B．Milk, bread, cabbages and beef.
C．Corn, fish, ice cream and pork.
D．Rice, beancurd(豆腐)，fish and chicken.
小題2:Which of the following is a good eating habit?
A．Going to school without any breakfast.
B．Eating fish and chips for supper all the time.
C．Having at least food from one of the four groups each meal.
D．Having different food from all four food groups.
小題3: In this passage the writer mainly tells us that____.
A．every person needs food to grow well.
B．taking exercise can keep your body strong.
C．the right kind of food with exercise will keep you healthy.
D．enough energy helps people think more quickly.
小題4:The underlined word “dairy” in the second paragraph means_____.
A．the food made out of cows such as milk and butter
B．the shop that sells milk and butter
C．a(chǎn) farm where cows are kept
D．a(chǎn) place where milk products are made

查看答案和解析>>

科目：高中英語 來源：不詳 題型：閱讀理解

閱讀下面短文，從各題A、B、C、D四個選項中，選出最佳答案。
People who smoke could lose around one third of their daily memory, researchers say.
A study by a team at Northumbria University showed that smokers lost more of their memory when compared to non-smokers.
And the research also found that those who kicked the habit saw their ability to recollect information restored to almost the same level as non-smokers.
The study involved more than seventy 18-to-25-year-olds and included a tour of the university’s campus. Those who took part were asked to recall small details, such as a list of songs played at a campus concert and tasks completed at various points－known as real world memory test. Smokers performed badly, remembering just 59 percent of tasks. But those who had given up smoking remembered 74 percent and those who had never smoked recalled 81 percent of tasks.
Dr. Tom Heffernan, who leads Northumbria University’s Collaboration for Drug and Alcohol Research Group, said the findings would be useful in anti-smoking campaigns. He said, “Given that there are up to 10 million smokers in the UK and as many as 45 million in the United States, it's important to understand the effects smoking has on everyday cognitive（認(rèn)知的）function-of which prospective memory is an excellent example. ”
“This is the first time that a study has set out to examine whether giving up smoking has an impact on memory. We already know that giving up smoking has huge health benefits for the body, but this study also shows how stopping smoking can have knock-on benefits for cognitive functions too. ’’
The research will now investigate the effects of passive smoking on memory, while Dr. Heffernan and Dr. Terence O’Neil will look into the effects of third-hand smoking－toxins left on curtains and furniture.
小題1:What’s the main idea of the passage?
A．Smoking does harm to health.
B．Smokers take a tour to the University’s campus.
C．Smoking can affect one’s memory.
D．Smokers are compared to non-smokers.
小題2:How did those who took part in the study perform when asked to recall small details?
A．Smokers did the worst among the participants.
B．Non-smokers could recall about half of them.
C．Smokers could recall nothing at all.
D．Those who gave up smoking did best.
小題3:According to Dr. Tom Heffernan, the findings_______.
A．would be really a surprise to the public
B．would contribute to fighting against smoking
C．would be used in real world memory test
D．would be nothing new to the researchers
小題4:What does the underlined word “impact’’ most probably mean?
A．orderB．impressionC．expression D．effect
小題5:What will Dr. Heffernan and Dr Terence O’Neil do?
A．Investigate the effects of third-hand smoking.
B．Do research on how smoking affects passive smokers.
C．Find ways to persuade people to quit smoking.
D．Study whether giving up smoking affects memory.

查看答案和解析>>

同步練習(xí)冊答案