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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(万亿)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 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(易吸收的液体). 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).
【小题1】Why is the warning in the small print?
| A.They think people will not care about it. |
| B.There is not enough space for the warning. |
| C.They don’t want the users to pay attention to it. |
| D.The warning is not important at all. |
| A.acceptable | B.valuable | C.accessible | D.easily affected |
| 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. |
| 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. |
Cities need to put efforts to deal with pollution and clear the air.
Chinese cities will need to put efforts to clear up the sky when a new department to improve regional air quality is set up by 2015,according to the latest plan released by the State Council.
Besides the existing pollution control program for CO2,regional emission caps(区域排放上限) for other certain chemicals will be established in the three key air polluting areas—the Yangtze River Delta,Pearl River Delta and the Beijing-Tianjin- Hebei region. Coal-consumption caps will also be tried out in some areas,according to the plan.
The plan is aimed at dealing with regional air pollution—such as acid rain and smog—which have become increasingly obvious in China in recent years and caused a severe threat to people’s health,Zhang Lijun,viceminister of environmental protection,said in an interview on Monday.
The air quality in a city affects the areas nearby because pollutants can travel in the sky,said Chai Fahe,vice-director of Chinese Research Academy of Environmental Sciences.
“So efforts to reduce air pollution in a single city,targeting a certain pollutant(污染物) will not be enough,” Chai said.
Zhang said the country’s major industrial districts—the Yangtze River Delta,Pearl River Delta and the Beijing-Tianjin-Hebei region—have recorded more than 100 misty days annually in recent years.
These three regions,home to at least 200 million people,occupy only 6.3 percent of the country’s area but consume 40 percent of the country’s coal and produce half of its steel,according to official figures.
Studies also show that the visibility(能见度) in eastern regions of China has dropped by 7 to 15 km compared to that in the early 1960s,as a result of air pollution.
Liaoning province,the Shandong Peninsula,Wuhan in Hubei province and its surrounding area,the Changsha-Zhuzhou-Xiangtan region in Hunan province,the Chengdu-Chongqing region,and the western coast of the Taiwan Straits are also listed as areas to carry out such regional air pollution control programs,according to the plan.
The new plan also requires an improved air quality system,which will measure the pollution levels. “The current system,which only measures some major pollutants,cannot reflect the_truepicture.” said Chai.
1.It will not be enough to reduce air pollution in a single city because ________.
A.air pollution has been becoming more and more serious in recent years
B.air pollution like acid rain and smog is threatening people’s health
C.air pollutants in a city can travel in the sky and affect nearby areas
D.air pollutants stay in fixed places over the cities
2.Suppose the visibility in eastern regions of China was 130 km in the early 1960s,the visibility there nowadays is ________.
A.123 to 115 km B.137 to 145 km
C.123 to 145 km D.115 to 137 km
3.The main purpose of the passage is ________.
A.to inform readers of the damage caused by air pollution
B.to introduce the new plan to control air pollution
C.to provide official figures of air pollution levels
D.to point out the regions affected by air pollution
4.What does the underlined phrase “the true picture” in the last paragraph mean?
A.The major pollutants.
B.The key polluted areas.
C.The major polluted cities.
D.The pollution levels.
查看习题详情和答案>>
Dear Aunty,
After years of her crying. I finally gave in and allowed my daughter to have a cat. I now regret my decision. As someone needs to have a clean, tidy house, I no longer feel relaxed in my own home. If I tell her, “sorry, the cat has to go.” She will be heartbroken. What can I do?
-Feline Phobic
Dear Phobic,
I’m an animal lover and on your kid’s and cat’s side. Tell your daughter your problem. Ask her to help you come up with a plan. Perhaps you can agree to allow the cat only in certain areas of the house. This is a chance for your daughter to develop the sense of responsibility owning a pet requires.
Dear Aunty,
I got the highest grade on a biology test. Now the popular kids think I’m brainy, and want me in their lab group. I knew I was being used. Now, they want my homework. What should I do?
-Lily
Dear Lily.
Popularity can come at a price, but it’s no excuse to cheat. Offer to help new friends with their homework, but don’t give them yours.
Dear Aunty,
I’m one of six assistants in a dental(牙科的) office. But I’m new-there just four months. I’ve tried to join conversations, but they just ignore me. They go shopping together. No one invites me. How can I break into the circle?
-Crystal
Dear Crystal,
Humans run in packs like dogs. When a new dog enters the pack, a lot of discovery goes on. So bring cookies for everyone! Then try making friends with one co-worker. Invite her to lunch. When you get familiar with each other, tell her how hard you’re finding the situation at work. chances are, she’ll take you under her wing.
1.Aunty thinks that Phobic should .
A.try to persuade her daughter to give in.
B.spend more time cleaning the house.
C.ask her daughter to help tidy up
D.find a better way to keep the cat.
2.The underlined word “brainy” in the passage means .
A.excited B.friendly C.intelligent D.hard-working
3.According to the passage, .
A.Phobic can’t get along well with her daughter.
B.Aunty is fond of animals like cats.
C.Crystal’s coworkers are cheating her.
D.Lily has no interest in lab experiments.
查看习题详情和答案>>
Cities need to put efforts to deal with pollution and clear the air.
Chinese cities will need to put efforts to clear up the sky when a new department to improve regional air quality is set up by 2015,according to the latest plan released by the State Council.
Besides the existing pollution control program for CO2,regional emission caps(区域排放上限) for other certain chemicals will be established in the three key air polluting areas—the Yangtze River Delta,Pearl River Delta and the Beijing-Tianjin- Hebei region. Coal-consumption caps will also be tried out in some areas,according to the plan.
The plan is aimed at dealing with regional air pollution—such as acid rain and smog—which have become increasingly obvious in China in recent years and caused a severe threat to people’s health,Zhang Lijun,viceminister of environmental protection,said in an interview on Monday.
The air quality in a city affects the areas nearby because pollutants can travel in the sky,said Chai Fahe,vice-director of Chinese Research Academy of Environmental Sciences.
“So efforts to reduce air pollution in a single city,targeting a certain pollutant(污染物) will not be enough,” Chai said.
Zhang said the country’s major industrial districts—the Yangtze River Delta,Pearl River Delta and the Beijing-Tianjin-Hebei region—have recorded more than 100 misty days annually in recent years.
These three regions,home to at least 200 million people,occupy only 6.3 percent of the country’s area but consume 40 percent of the country’s coal and produce half of its steel,according to official figures.
Studies also show that the visibility(能见度) in eastern regions of China has dropped by 7 to 15 km compared to that in the early 1960s,as a result of air pollution.
Liaoning province,the Shandong Peninsula,Wuhan in Hubei province and its surrounding area,the Changsha-Zhuzhou-Xiangtan region in Hunan province,the Chengdu-Chongqing region,and the western coast of the Taiwan Straits are also listed as areas to carry out such regional air pollution control programs,according to the plan.
The new plan also requires an improved air quality system,which will measure the pollution levels. “The current system,which only measures some major pollutants,cannot reflect the_truepicture.” said Chai.
【小题1】It will not be enough to reduce air pollution in a single city because ________.
| A.air pollution has been becoming more and more serious in recent years |
| B.air pollution like acid rain and smog is threatening people’s health |
| C.air pollutants in a city can travel in the sky and affect nearby areas |
| D.air pollutants stay in fixed places over the cities |
| A.123 to 115 km | B.137 to 145 km |
| C.123 to 145 km | D.115 to 137 km |
| A.to inform readers of the damage caused by air pollution |
| B.to introduce the new plan to control air pollution |
| C.to provide official figures of air pollution levels |
| D.to point out the regions affected by air pollution |
| A.The major pollutants. |
| B.The key polluted areas. |
| C.The major polluted cities. |
| D.The pollution levels. |
Dear Aunty,
After years of her crying. I finally gave in and allowed my daughter to have a cat. I now regret my decision. As someone needs to have a clean, tidy house, I no longer feel relaxed in my own home. If I tell her, “sorry, the cat has to go.” She will be heartbroken. What can I do?
-Feline Phobic
Dear Phobic,
I’m an animal lover and on your kid’s and cat’s side. Tell your daughter your problem. Ask her to help you come up with a plan. Perhaps you can agree to allow the cat only in certain areas of the house. This is a chance for your daughter to develop the sense of responsibility owning a pet requires.
Dear Aunty,
I got the highest grade on a biology test. Now the popular kids think I’m brainy, and want me in their lab group. I knew I was being used. Now, they want my homework. What should I do?
-Lily
Dear Lily.
Popularity can come at a price, but it’s no excuse to cheat. Offer to help new friends with their homework, but don’t give them yours.
Dear Aunty,
I’m one of six assistants in a dental(牙科的) office. But I’m new-there just four months. I’ve tried to join conversations, but they just ignore me. They go shopping together. No one invites me. How can I break into the circle?
-Crystal
Dear Crystal,
Humans run in packs like dogs. When a new dog enters the pack, a lot of discovery goes on. So bring cookies for everyone! Then try making friends with one co-worker. Invite her to lunch. When you get familiar with each other, tell her how hard you’re finding the situation at work. chances are, she’ll take you under her wing.
1.Aunty thinks that Phobic should .
A.try to persuade her daughter to give in.
B.spend more time cleaning the house.
C.ask her daughter to help tidy up
D.find a better way to keep the cat.
2.The underlined word “brainy” in the passage means .
A.excited B.friendly C.intelligent D.hard-working
3.According to the passage, .
A.Phobic can’t get along well with her daughter.
B.Aunty is fond of animals like cats.
C.Crystal’s coworkers are cheating her.
D.Lily has no interest in lab experiments.
查看习题详情和答案>>