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题型:阅读理解-阅读单选 难度:0.65 引用次数:150 题号:14444789

Feeling inactive at work? Indoor pollution might play a part. A new study by scientists at Harvard has found that the air quality inside an office can have a significant impact on employees cognitive (认知的) function.

"The limited amount of previous studies on indoor settings focused on measures like thermal (热的) comfort and satisfaction, rather than on cognitive outcomes," Jose Guillermo Cedeno Laurent, a researcher told AFP.

Jose and his colleagues designed a study that followed 302 office workers across six countries over a period of a year, all of whom were aged between 18 and 65 and worked at least three days in an office building. Their workspaces were fitted with an environmental sensor to monitor real time concentrations of PM2.5. The participants were given a custom-designed app on their phones to carry out the cognitive tests, which they were reminded to take at prescheduled times or when PM2.5 levels fall below or rise beyond certain thresholds (临界点).

There were two tests for the participants. The first required them to correctly identify the color of displayed words that spelled out another color. This evaluated cognitive speed. The second test involved basic calculation with long numbers to assess cognitive speed and working memory.

Results showed that an increase of 10 micrograms per cubic meter of PM led to about a one percent reduction in response times, and more than a one percent reduction in accuracy.

"While past studies have shown that prolonged exposure to PM2.5 damages the central nervous system and causes long-term neuro diseases, this is the first to show short-term effects on people's cognitive abilities," Jose told AFP.

For employees returning to in-person office work, it is time to open a window for fresh air. If the outdoor air quality isn't good, adding high quality portable air cleaners is a good choice.

1. What's the function of the environmental sensor?
A.To monitor indoor air quality.
B.To evaluate workers'job performance
C.To improve working environment.
D.To develop workers' memory accuracy
2. What method did Jose mainly use in his study?
A.Giving examples.B.Analyzing causes.
C.Making comparisons.D.Confirming assumptions.
3. It can be concluded from the passage that________.
A.polluted air destroys one's nervous system
B.an air cleaner is a must in an office building
C.indoor setting determines a person's productivity
D.fresh air contributes to a person's cognitive accuracy
2021·浙江台州·一模 查看更多[2]
【知识点】 科普知识 说明文

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【推荐1】Gardening is popular in many parts of the world. This outdoor activity gives us beautiful plants, pleasant smelling flowers and fresh fruits and vegetables. But it also does a lot of good to our health.

Gardening connects people. When you are gardening, you are outdoors. So it is a perfect chance to meet and spend time with your neighbors. Most people love to talk about their hobbies, and gardeners are no different. They usually enjoy showing people what they are growing. And most enjoy sharing advice and stories about their gardens almost as much as sharing flowers and vegetables from their gardens.

Gardening is a great activity for children. It gets them outdoors and off computers, televisions and cell phones. Gardening is also a great teacher. It can teach a child about where food comes from and healthy eating. It also helps them to understand that the natural resources (资源) are not endless and the importance of using them carefully.

Then, when you garden, you must move around. All the different movements needed for gardening, like bending and lifting, work small muscles (肌肉) in the body. And you can easily get good exercise when you are digging holes or pulling grasses.

In a study, researchers looked at more than 2, 800 people over the age of 60. They studied their lifestyle habits, activities and health over a 16-year period. They found that gardening could lower the risk of future dementia (痴呆) by 36%. Gardening requires people do many repeated actions, such as picking off dying flowers. These actions have a calming influence on the brain. The brain is still active but not in the same way when we use computers. You’ll feel wonderful when what you grow in a garden looks, smells, feels and tastes good.

1. What do gardeners often like to talk about among neighbors?
A.How they kill time.B.What habits they have.
C.What they grow in the garden.D.Who they meet outdoors.
2. Why does the writer think it so good for children to do gardening?
A.Children will get much healthy food from gardening.
B.Children can use natural resources freely when gardening.
C.Children can do gardening with their computers or telephones.
D.Children may like going outdoors and get much knowledge from gardening.
3. What great effect does gardening have on the old?
A.It brings them a tiring life.
B.It makes them live longer and longer.
C.It helps the old enjoy more activities.
D.It can make their brain active in a different way.
4. What’s the purpose of the writer?
A.To show us how to garden.
B.To encourage people to garden.
C.To show the popularity of gardening.
D.To advise people to do outdoor activities.
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The researchers tested the children again when they were twelve and fifteen years old. The tests found that the children who had been in the child-care center continued to have higher average test results. These children did much better on tests of reading and mathematics.
A few years ago, organizers of the Abecedarian Project tested the students again. At the time, each student was twenty-one years old. They were tested for thinking and educational ability, employment, parenting and social skills. The researchers found that the young adults who had the early education still did better in reading and mathematics tests. They were more than two times as likely to be attending college or to have completed college. In addition, the children who received early education were older on average, when their first child was born.
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The researchers of the Abecedarian Project believe their study shows a need for lawmakers to spend money on public early education. They believe these kinds of programs could reduce the number of children who do not complete school and are unemployed.
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3. What don't we know about the Abecedarian Project after reading the text?
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B.How important early education is for poor children.
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D.Whether lawmakers will spend money on public early education.
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