E-cigarettes一thought by some to be responsible for a decline in youth cigarette smoking---are actually attracting a new population of adolescents who might not otherwise have smoked tobacco products, according to anew UC San Francisco study.
In the first national analysis of the impact of e-cigarettes on trends in youth smoking in the United States, UCSF researchers did not find evidence that e-cigarettes have caused youth smoking to decline. In fact, combined e-cigarette and cigarette use among adolescents in 2014 was higher than total cigarette use in 2009,according to the study.
The authors concluded that the low-risk youth in the study, who went on to smoke regular cigarettes, may not have used nicotine at all if e-cigarettes did not exist.
“We didn't find any evidence that e-cigarettes are causing youth smoking to decline, ”said lead author Lauren Dutra, a former postdoctoral fellow at the UCSF Center for Tobacco Control Research and Education and current social scientist at RTI International, a not-for-profit research organization based in North Carolina.
“While some of the kids using e-cigarettes were also smoking cigarettes, we found that kids who were at low risk of starting nicotine with cigarettes were using e-cigarettes," Dutra said. “Recent declines in youth smoking are likely due to tobacco control efforts, not to e-cigarettes.”
The national analysis builds on several previous studies that have reported that adolescents who start withe-cigarettes are more likely to subsequently smoke traditional cigarettes.
In August 2016, the US Food and Drug Adminis-tration restricted e-cigarette purchases to adults ages 18and older( California set the age to 21). The FDA also will require a warning label on e-cigarettes, starting August2018, regarding the addictive nature of nicotine. However, the FDA's ruling does not regulate advertising or flavors,and e-cigarettes continue to be sold in flavors that appeal to youth.
1. What is the initial purpose for e-cigarettes to be invented?A.To warn people of the harm of smoking. | B.To discourage people from smoking. |
C.To make cigarette smoking less harmful. | D.To help kids give up smoking. |
A.They actually have a negative influence on youth. |
B.They are helpful in keeping kids away from smoking. |
C.They help reduce the number of smokers. |
D.They turned out to be less harmful than cigarettes. |
A.People's awareness of health. | B.The use of e-cigarettes. |
C.Efforts to control tobacco. | D.Restrictions on e-cigarette sales. |
A.Advertising for e-cigarettes should be stopped. |
B.There should be a warning label on e-cigarettes. |
C.E-cigarettes should not contain flavors. |
D.E-cigarettes should be further promoted. |
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【推荐1】Cheese and red wine are basic diets over the festive period, and if you love red wine and cheese, a new study will come as music to your ears. Researchers from Iowa State University have found that drinking red wine and eating cheese can help to reduce cognitive (认知的) decline.
In the study, the researchers analyzed data from 1,787 adults aged 46 to 77, and asked them to complete questionnaires about their food and alcohol consumption (摄取). The results showed that cheese was the most protective food against age-related cognitive problems, even into late life. Daily consumption of red wine was also shown to improve cognitive function, while weekly consumption of lamb was shown to improve long-term cognitive skills. However, over-consumption of salt was found to increase the risk of cognitive decline.
Dr. Auriel Willette, who led the study, said: “I was pleasantly surprised that our results suggest that appropriately (合适地) eating cheese and drinking red wine daily are not just good for helping us cope with some diseases, but perhaps also dealing with an increasingly complex world. Although we considered whether this was just due to what rich people eat and drink, clinical trials (临床试验) at random are needed to determine if making easy changes in our diet could help our brains in great ways.”
While the reason for the link remains unclear, the researchers believe that cheese and red wine may protect some people from the effects of Alzheimer’s (阿尔兹海默症).
Brandon Klinedinst, an author of the study, added: “Depending on the genetic factors you carry, some individuals seem to be more protected from the effects of Alzheimer’s, while others seem to beat greater risk. Perhaps the silver bullet we’re looking for is improving how we eat. Knowing what that involves contributes to a better understanding of Alzheimer’s and putting this disease in an opposite path.”
1. Which of the following increases the risk of cognitive problems?A.Taking in too much salt. | B.Eating cheese properly. |
C.Drinking red wine daily. | D.Consuming lamb weekly. |
A.Changes in our diet help our brains in significant ways. |
B.The diets of wealthy people were not taken into account. |
C.The study results need to be proved by more clinical trials. |
D.Some diseases make our world increasingly complex. |
A.Genetic factor. | B.Easy solution. |
C.Special metal. | D.Certain food. |
A.Basic diets over the festive period. |
B.Possible reasons for cognitive decline. |
C.Feelings of pleasant music to people’s ears. |
D.Effects of certain diets on cognitive decline. |
【推荐2】According to a new study by researchers at the University of Hawaii, the average land location on Earth will experience about 5% more rainbows by the end of the2lst century.Like other major changes in store for those living into the next century, the rate of rainbows will grow due to climate change.
“By 2100,climate change is likely to generate a 4.0%~4.9% increase in global annual rainbow days,”the researchers write.“Around 21%~34% of land areas will lose rainbow days and 66%~79% will gain rainbow days,with rainbow gain hots pots mainly in high-latitude(高纬度的)and high-elevation regions with smaller human populations.”
To estimate if rainbows might increase or decrease in a world affected by climate change,the research team decided to create a first-ever global map of their occurrences. For this, they turned to an unlikely assistant:Flickr. The online photo sharing platform offers a deep well of data on rainbows, with millions of users uploading images of the atmospheric phenomenon from around the world. Of course, just typing in ”rainbow“presented its own problem.
“We had to sort through photos of rainbow artwork, rainbow flags and rainbow foods to find the real rainbows,” co-author Amanda Wong said in a press release.
Once they had a vast image collection of rainbows generated by the refraction(折射)of light by rain droplets, the research team built a model based on the rainbow photo locations and global maps of precipitation (降水), cloud cover and sun angle. The model was then applied to present future rainbow occurrences over global land masses.
Not surprisingly,islands remain the dominant hots pots for rainbow activity. By 2100, the model predicts rainbow gains for northern latitudes and high elevations where climate change is expected to bring warmer temperatures,less snow and more rain.Regions where the model shows a drop in precipitation are expected to lose rainbow days.
While the team predicts that the average human will have more opportunities to witness a rainbow by 2100, they admit that it is not a delightful thing as it means we human beings are increasingly affected by climate change and that we should take immediate action in response to that.
1. What is the problem of typing in “rainbow” on Flickr?A.The data of rainbows are very limited. | B.Photos of real rainbows are rarely seen. |
C.The photo sharing platform breaks down. | D.Images of unreal rainbows appear as well. |
A.To monitor global land masses closely. | B.To predict future rainbow occurrences. |
C.To demonstrate global climate change. | D.To collect more latest rainbow images. |
A.Concern. | B.Delight. | C.Positivity. | D.Indifference. |
A.Global warming will threaten tourism. | B.A loss of rainbow days is unavoidable. |
C.Climate change boosts global rainbows. | D.Islands are hots pots for rainbow activity. |
【推荐3】We can achieve knowledge either actively or passively. We achieve it actively by direct experience, by testing and proving an idea, or by reasoning.
We achieve knowledge passively by being told by someone else. Most of the learning that takes place in the classroom is passive, and so is the kind that happens when we watch TV or read newspapers or magazines. Conditioned (习惯) as we are to passive learning, it’s not surprising that we depend on it in our everyday communication with friends and co-workers.
Unfortunately, passive learning has a serious problem. It makes us tend to accept what we are told even when it is little more than hearsay (传闻) and rumor (谣言).
Did you ever play the game Rumor? It begins when one person writes down a message but doesn’t show it to anyone. Then the person whispers it, word for word, to another person. That person, in turn, whispers it to still another, and so on, through all the people playing the game. The last person writes down the message word for word as he or she hears it. Then the two written statements are compared. Typically, the original message has changed.
That’s what happens in daily life. The simple fact that people repeat a story in their own words changes the story. Then, too, most people listen imperfectly. And many enjoy adding their own creative touch to a story, trying to improve on it, stamping (打上标记) it with their own personal style. Yet those who hear it think they know.
This process is also found among scholars and authors: A statement of opinion by one writer may be restated as a fact by another, who may in turn be quoted by yet another; and this process may continue, unless it occurs to someone to question the facts on which the original writer based his opinion or to challenge the interpretation he placed upon those facts.
1. What is the meaning of the words in Para.1 “experience”?A.经历 | B.环境 | C.专家 | D.苦难 |
A.doing a medical experiment | B.solving a math problem |
C.visiting an exhibition | D.doing scientific reasoning |
A.a message may be changed when being passed on |
B.a message should be delivered in different ways |
C.people may have problems with their sense of hearing |
D.people tend not to believe in what they know as rumor |
A.Active learning is less important | B.Passive learning may not be reliable |
C.Active learning occurs more frequently | D.Passive learning is not found among scholars |
A.introduce the advantages of passive learning | B.persuade us to adopt active learning |
C.explain why passive learning can be bad | D.compare active learning and passive learning |
【推荐1】Adaptive clothing brand Befree was founded by Nikki Puzzo and Joanne DiCamillo, two Massachusetts mothers who saw a need for clothing for individuals with disabilities. The inspiration for the brand came from Puzzo’s daughter, Stella. She is an eighth-grader and leads an active lifestyle, participating in activities like swimming, gymnastics, and working out with a trainer.
When Stella had a surgery at the age of 5, she was left with casts on both legs and a bar between them, making it impossible for her to wear traditional pants. Stella had to wear dresses or long T-shirts during her three month recovery period, which was unbearable for her. Wanting to find a solution that would allow her daughter to wear pants, Puzzo took apart a pair of brightly colored pajama bottoms and sewed them in Velcro. This simple fix turned out to be a “game changer” for Stella.
Impressed by the pants, the doctor at Boston Children’s Hospital encouraged Puzzo to mass-produce them, as many parents often struggle with dressing their children with disabilities. This feedback from the doctor motivated Puzzo and DiCamillo to start Befree.
Their goal is for adaptive clothes to be commonly found in stores and sold alongside traditional clothing within the next five years. While Befree did raise funds through a crowdfunding campaign, the company is primarily self-funded. They have not sought outside investment yet.
DiCamillo emphasized that the market for adaptive clothing extended beyond children with disabilities and includes adults with disabilities and individuals recovering from surgeries. The team is currently working on expanding their product range to include leggings, shorts, joggers and even jeans. They have already received numerous requests for adult sizes.
Overall, Befree is a company founded by mothers who saw a need for adaptive clothing and took action to meet this demand. Their determination and innovation have resulted in a brand that aims to make dressing easier and more inclusive for individuals with disabilities. With their focus on expanding their product range and making adaptive clothing mainstream, Befree is prepared to have a significant impact on the fashion industry.
1. What happened to 5-year-old Stella?A.She quarrelled with her trainer. | B.She went through an operation. |
C.She choked while learning to swim. | D.She got hurt when doing gymnastics. |
A.Favorable. | B.Doubtful. | C.Unconcerned. | D.Unclear. |
A.Its target customers are children. | B.It is totally self-funded. |
C.Its products are in great demand. | D.It was founded by two doctors. |
A.Joanne DiCamillo: A Great Partner | B.Nikki Puzzo: A Wonderful Mother |
C.Stella: A Girl Suffering From an illness | D.Befree: A Company Making Adaptive Clothing |
【推荐2】David Warren, born in 1925, had great interest in science and engineering from childhood, and was studying for his amateur radio license when a World War II ban on hobby radio forced him to redirect his efforts to chemistry sets. He went on to earn a B.S. from the University of Sydney and a Ph.D. in chemistry from Imperial College London. He then spent three years as a science officer at the Woomera Rocket Range, before joining the Aeronautical Research Laboratories (ARL).
In 1953, the ARL assigned him to a panel investigating two crashed of airplanes. Warren found his mind wandering to a device he had seen at a trade fair: the Minifon, a German device that was marketed as the first pocket recorder. The device was intended for businessmen, but Warren began thinking how useful it would be for airplanes.
But when Warren described his new idea to his boss, he showed no enthusiasm. In 1955, he got a new boss named Tom Keeble, to whom he promoted the idea again. Keeble told Warren to outline specifications for a prototype (样机). The ARL contracted with Theon “Tych” Mirfield, a Melbourne-based instrument maker, to build the first working prototype, which was completed in 1958.
The response to the prototype was depressing. According to a 1998 account by Warren, civil authorities said that “Dr. Warren’s instrument has little immediate direct use in airplanes.” That critical reception might have affected the flight recorder. But Robert Hardingham, Secretary of the U.K. Air Registration Board, happened to see the prototype on an informal visit to the ARL, and he was so impressed that he arranged for Warren to fly to England to demonstrate it.
Back in Australia, the ARL assigned Warren a team to update the prototype. The ARL system itself was never patented and never went into production, but the British firm of S. Davall & Sons approached the ARL for the production rights. The Davall “red egg” accident recorder eventually won a large share of the flight data recording market.
1. What did Warren do according to Paragraph 1?A.He gained a Ph.D. from the University of Sydney. |
B.He showed interest in chemistry during childhood. |
C.He gave up his hobby due to a wartime ban. |
D.He worked as a science officer at the ARL. |
A.A German-designed machine for businessmen. |
B.A battery-powered device for airplanes. |
C.The two crashes of airplanes. |
D.The science fair of the ARL. |
A.Positive. | B.Unfavorable. |
C.Contradictory. | D.Unclear. |
A.It was patented by the ARL in 1958. |
B.It was designed by Theon “Tych” Mirfield. |
C.It was updated by Robert Hardingham. |
D.It was mass-produced by a British company. |
【推荐3】A gadget which makes water out of air could become the greatest household invention since the microwave.
Using the same technology as a dehumidifier (除湿器), the Water Mill is able to create a ready supply of drinking water because it can always get it from an unlimited source — the air.
The company behind the machine says not only does it offer an alternative to bottled water in developed countries, but it is a solution for the millions who face a daily water shortage.
The machine works by drawing in wet air through a filter (过滤器) and over a cooling instrument which changes it into water droplets. It can produce up to 12 liters a day. The Water Mill will also produce more water when storms pass over, as the amount of water which is contained in the air increases. In keeping with its eco-development, the machine uses the same amount of electricity as three lights.
Inventor Jonathan Ritchey said: “The demand for water is off the chart. So people are looking for freedom from water distribution systems that are shaky and unreliable.”
The machine, which is about 3 feet wide, is likely to cost£800 when it goes on sale here in the spring. Its maker, Canadian Firm Element Four, roughly calculates that a liter of water costs around 20p to produce.
Environmentalists state that half the world’s population will face water shortage because of climate change by 2080. One in five is said to lack access to safe drinking.
The Water Mill is not effective in areas where the amount of water contained in the air is below about 30 percent, but in Britain that won’t be much of a problem.
1. What does the underlined word “it” in Paragraph 2 refer to?A.Water Mill. | B.Invention. |
C.Microwave. | D.Drinking water. |
A.It absorbs steam and turns it into water. |
B.It is very expensive for families to afford. |
C.It works in the same way as microwaves. |
D.It helps to make the water clean to drink. |
A.A New Way to Solve Water Problem | B.A Dehumidifier to Produce Water |
C.A Machine to Make Water out of Air | D.An Absolutely New Invention |
【推荐1】Charles Darwin was a British scientist known for his support of evolution and his publications that helped bring the idea into the scientific mainstream. His theory regarding natural selection was supported by sufficient scientific evidences that were collected during his travels around the globe.
Darwin Becoming a Naturalist.
In 1828, Darwin joined Christ’s College, Cambridge, to study to become a parson. However, he was unqualified to join in any course other than an ordinary degree course. He passed his Bachelor of Arts degree in the year 1831. It was in Christ’s College where he met two influential people - Adam Sedgwick and John Stevens Henslow. They would help shape the rest of Darwin’s life as a naturalist and change our understanding of the natural world forever.
Henslow helped Darwin get aboard the HMS Beagle in 1831. During the course of his trip, Darwin collected samples of various natural specimens including fossils, plants, and birds. During this time, Darwin read Principles of Geology, written by Lyell, which suggested that fossils are animals that lived thousands of years ago.
This argument was reinforced in Darwin’s mind by the various geographical features and rich animal life he saw during his voyage. In 1835, the Beagle reached the Galapagos Islands which had a large number of animal and bird species. He collected various specimens and noted that those specimens that belong to the same geographical location were closely related, even though their feeding habits and structures were different.
Making the Theory
In 1836, Darwin returned to England and started to solve the riddles of his observations and understand how species evolve. He then proposed a theory of evolution by the process of natural selection after getting influenced by the ideas of Malthus. According to him, the animal and plant species that are best suited to their surroundings will survive and reproduce easily. They will then pass on the characteristics that helped them survive to their offspring. Gradually, the species change over time.
In 1838, Darwin married Emma Wedgewood. They moved to Down House in 1842 along with their children. This is about the time when he developed the theory of evolution through natural selection more fully. However, it took around 15 years to finalize his manuscript.
In 1858, Darwin joined with another scientist who had similar ideas on evolution. In 1859, Darwin published his book On the Origin of Species by Means of Natural Selection. The book was criticized widely so he tried to answer their questions in an additional five editions which were published during his lifetime. Charles Darwin died in 1882 and was buried in Westminster Abbey.
1. What is the best sub-title for Pragraph 3?A.Species on the Islands | B.Travels on the Beagle |
C.Inspired by Fossils | D.Species Collecting |
A.It took Darwin 17 years to polish his theory. |
B.Darwin firmly opposed Lyell’s argument after starting his voyage. |
C.Darwin led a peaceful elder life without disturbance. |
D.The Evolution Theory was criticized by the public, but Darwin ignored those voices. |
A.In college, Darwin was unqualified to join in any course. |
B.It is Adam and John that helped Darwin develop his artistic talent. |
C.Not until Darwin went on travelling did he deeply understand the statement of fossils. |
D.In 1842, he put forward a complete theory. |
A.To introduce the Evolution Theory. |
B.To show readers the proof of natural selection. |
C.To introduce Charles Darwin. |
D.To show how the Evolution Theory was developed. |
【推荐2】Buried beneath a sand dune, in the beach town of Beidaihe, lies one of China’s newest art galleries. The UCCA Dune Art Museum is actually the home of “one of the few remaining un-destroyed dunes in northern China”.
Instead of placing the museum on top of the dunes which was originally planned, Li Hu, one of the founding partners of the project, decided to bury the building beneath them to preserve the coastal ecology. The ancient sand dune in which the museum is now housed was due to be flattened to make way for development.
Its walls and windows and the wooden tables in its café were handmade from local materials, collective wisdom of the craftsmanship of the Hebei region. However,the modern methods of construction lessened the need for man-made objects that might disturb the native ecology. “We adopted a series of strategies in order to protect the fragile ecology of the dune,” Li says, explaining the process. The structure relies on the sand to help regulate its temperature throughout the year alongside a ground-source heat system. Because the museum is lit naturally by skylights, visitors’ experiences of the artwork will vary with the seasons and time of day.
“Going to a museum in China often feels like going to a shopping centre,” says Mr. Li—an experience of rushed consumerism, typically featured large crowds and smartphone selfies(自拍). By contrast, the Dune's galleries reminds us of the caves in which the most primitive human art was first painted,rather than a hurried urban fly-by.
“Nature is not just for looking. It should not be used in architectural projects as merely a decoration, or a skin job. Our work was not just to design a physical structure, but to maintain a balance between nature and humanity.” says Mr. Li.
1. What do we know the UCCA Dune?A.It’s on top of the dunes. | B.It’s a traditional art galleries. |
C.It’s non-profit. | D.It makes use of unused landscape. |
A.Handmade materials. | B.Wooden structure. |
C.Man-made lights. | D.Saving extra energy consumption. |
A.Going to the galleries is like a hurried urban fly-by. |
B.It features large crowds. |
C.It establishes a connection between man and nature. |
D.It shows the caves of the most primitive human. |
A.Education. | B.Art. | C.Science. | D.Travel. |
【推荐3】There is good reason to believe that emerging digital technologies can improve the functioning of agriculture markets at a very low cost per farmer.
Mobile phones, particularly GPS-enabled smartphones, make the provision of tailored information much easier than before. Recommendations for agrochemical inputs that address specific soil conditions can improve yields while reducing environmentally harmful and wasteful use. Farmers can tailor their investment decisions to expected weather patterns and benefit from improvements in weather forecasting. As smartphone use continues to expand, farmers will increasingly have the means to watch videos demonstrating new agricultural techniques or take pictures of pests affecting their crops and either request automatic identification and recommendations or raise questions with agronomists. Finally, digital agricultural services can improve the functioning of agricultural supply chains. For example, these services could make it easier for farmers to check and compare input or output prices ; and facilitate coordination among farmers in an area and with traders.
However, despite the potential of digital agriculture, reasons for skepticism remain. Overcoming informational restrictions may not result in substantially increased agricultural productivity, given the existence of other barriers such as input shortages at local markets, and missing insurance markets. Informational barriers are also important, and mobile phone messages may not overcome them: some farmers ignore messages, especially from unknown sources. Some farmers are illiterate and have difficulty using voice menus. Senders may design obscure and confusing messages or may provide messages designed to target objectives at odds with farmer interests. Effective communication may require pictures or video. Smartphones are thus required to receive these messages, but few farmers currently have access to this technology in the poorest countries. Finally, farmers may begin to ignore reminders they are repeated too often, or they may be annoyed by unwanted messages, which could lead to reduced trust in the messaging system.
1. According to Para 2, what can farmers do in digital agriculture?A.They can use agrochemical to handle environmental problems. |
B.They can adjust investment decisions based on weather forecasts. |
C.They can identify pests on their crops by watching videos. |
D.They can compete with others in prices in an efficient way. |
A.In disagreement with. | B.By means of. |
C.In line with. | D.Apart from. |
A.Shortages of input in local markets and lack of insurance markets. |
B.No access to digital technology in poorest countries. |
C.Failure to read or use the voice menu on mobile phones. |
D.Loss of interest and ignorance of the intended messages. |
A.Supportive. | B.Doubtful. | C.Objective. | D.Negative. |
【推荐1】The sun appears to experience far fewer changes in brightness and intensity than other stars like it. Researchers reported last week on their examination of 369 stars. They compared each one to the sun in terms of surface temperature, size and rotation. They found that on average, the other stars had five times more brightness variability than our sun.
The lead author was Timo Reinhold, an astronomer with the Max Planck Institute for Solar System Research in Germany. He told the Reuters news agency that the variability in brightness results from dark spots on the surface of the star moving in and out of view.
“A direct measure of solar activity is the number of sunspots on the surface,” Reinhold said. “Finding such stars with very similar parameters as our sun but being five times more variable was surprising.”
The sun —made up mainly of hydrogen and helium—is an average-sized star that formed more than 4.5 billion years ago. It stretches about 1.4 million kilometers across and has a surface temperature of 5,500 degrees Celsius.
The researchers compared scientific data on the similar stars to historical records of the sun’s activity. The records included about 400 years of observational data on sunspots. The researchers also studied about 9,000 years of data based on chemical element variants in tree rings and ice buildup tied to solar activity. These records show the sun has not been much more active than it is now.
The researchers said increased magnetic activity related to sunspots can lead to electromagnetic events that effect Earth. For example, large releases of plasma—a collection of charged particles—from outer areas of the sun’s atmosphere could cause problems for satellites and other communications equipment.
The discovery may be good news for life on Earth A much more active sun might have had more major effects on Earth’s geology and ancient climate. “A ‘too active’ star would definitively change the conditions for life on the planet, so living with a quite boring star is not the worst option,” Reinhold said.
The findings, he noted, do not rule out the possibility that the sun may be in a quiet period and could become more variable in the future. However, the researchers say there are no signs that solar activity will be increasing any time soon.
1. According to Timo Reinhold, what causes the variability in brightness of the sun?A.Hydrogen and helium in the sun. |
B.The surface temperature of the sun. |
C.The diameter (直径) of the sun. |
D.Dark spots on its outer part. |
A.Scientific data of all the other stars. |
B.Data of sunspots observed in the past 400 years. |
C.9,000 years of data of the activities of the sun. |
D.Data of chemical element variants in icy trees. |
A.There will be a decreased magnetic activity. |
B.The geology and climate of the Earth will be different. |
C.Satellites and other communications equipment will work better. |
D.People on the Earth have to live with the quite boring star. |
A.The sun: less active than similar stars |
B.The sun: less bright and intense than before |
C.Sun spots: a direct measure of solar activity |
D.Sun spots: the cause of electromagnetic events on Earth |
【推荐2】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 makers 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.
If health issues arise from cell phone use, the possible effects are huge. According to Devra Davis, an expert who has worked for the University of Pittsburgh, brain cancer is a concern. 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—29 age group and a drop for the older population.
“Most cancers have many 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(穿透)only five centimeters into the brain of an adult will reach much deeper into the brains of children because their skulls(头骨)are thinner and their brains contain more absorptive(易吸收的)fluid.
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 belly(腹部).
1. Why is the warning in the small print?A.They think people will not mind it. | B.The warning is not important at all. |
C.They don’t want the users to notice it. | D.There is too little space for the warning. |
A.elegant | B.sensitive |
C.dynamic | D.relevant |
A.Because they don’t know about such dangerous radiation. |
B.Because they enjoy using cell phones more often than adults. |
C.Because they are not strong enough to fight against radiation. |
D.Because their skulls are thinner and their brains are easily hurt. |
【推荐3】Once I told someone I wanted to get a master’s degree of fine arts in creative writing and they told me it was the second-to-worst post-graduation plan they’d ever heard from a student.Arts degrees — especially fine arts degrees, which usually come in the form of music, studio art, creative writing and theater — have been, over the years, labeled (称为) useless.
It’s true that for the most part, STEM degrees give rise to higher paying jobs than liberal and fine arts degrees, and it’s understandable why young people care about a higher starting salary and financial security.Student loan debt is playing a role in the physical and mental stress of young people.
And while STEM majors usually have starting salaries that are $20,000 higher than those of liberal arts majors, by the time people reach the age of 40, the salaries between those who majored in the liberal arts and those who majored in STEM are virtually the same.For example, women who major in STEM earned nearly 50% more than social science and history majors at ages 23-25, but only 10% more by ages 38-40, a New York Times analysis reported.So even in terms of salary, which doesn’t solely determine whether or not a degree is useful, liberal arts degrees aren’t all that far behind STEM.
It seems too that since people nowadays are going to have to work longer, it’s more important than ever that we actually like and care about what we’re doing.Pursuing (追求) something enjoyable, or else a passion, is continuously found to be a key factor in maintaining healthy relationships, mental health, physical health and energy.In other words, not useless.
And just because someone’s primary job isn’t in their field of study — a writer who teaches high school for example— doesn’t make the degree useless.It just means that their way of finding a stable income is different.The same goes for artists who have to work multiple jobs to support themselves.They might have to find other means of supporting themselves and their artistry.It might be copy editing or it might be tutoring.
So I am going to graduate school, and I am going to graduate school for writing.I might be paying rent by way of overnight restaurant shifts — there’s so much I’m not sure of.But one thing I am sure of is this — I would rather be a writer working two jobs to pay my bills than be no writer at all.
1. A New York Times analysis report is mentioned in Paragraph 3 to ______.A.analyse the value of different majors | B.prove the argument against arts wrong |
C.raise the opinion on majors by example | D.present the link between majors and incomes |
A.Following art dreams keeps one in good condition. |
B.Doing what one loves builds up one’s confidence. |
C.Arts improves one’s understanding of different jobs. |
D.A love for arts helps one maintain passion for work. |
A.unavoidable | B.common | C.acceptable | D.traditional |
A.Arts students concern more about the value of life. |
B.The man not loving his work won’t stick with a job. |
C.Income often comes first when people choose majors. |
D.Graduates in arts can find possible development. |