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题型:阅读理解-阅读单选 难度:0.65 引用次数:66 题号:12374214

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.
2. What do we learn about e-cigarettes, according to the study?
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.
3. What probably caused the decline in youth smoking?
A.People's awareness of health.B.The use of e-cigarettes.
C.Efforts to control tobacco.D.Restrictions on e-cigarette sales.
4. What's the suggestions of the FDA?
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.
2. What can be inferred from Paragraph 3?
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.
3. What does the underlined phrase “silver bullet” in the last paragraph probably mean?
A.Genetic factor.B.Easy solution.
C.Special metal.D.Certain food.
4. What is the study mainly about?
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.
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【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.
2. Why did the researchers build a model?
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.
3. What is the team’s emotion conveyed in the last paragraph?
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4. What is the main idea of the text?
A.Global warming will threaten tourism.B.A loss of rainbow days is unavoidable.
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【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”?
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2. According to the passage, ________ belongs to passive learning.
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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
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A.Active learning is less importantB.Passive learning may not be reliable
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