Caffeine not only gives us a daily jump start, but new research suggests it also can strengthen long-term memory.
According to the US Food and Drug Administration, nearly 90 percent of people worldwide consume about 200 milligrams of caffeine each day. That' s equivalent to about one strong cup of coffee a day. Writing in " Nature Neuroscience" , Johns Hopkins University researchers say their findings show that caffeine strengthens certain memories for up t0 24 hours after being taken in.
" We've always known that caffeine has cognitive-enhancing effects (促智效果) , but its ,particular effects on strengthening memories and making them resistant to forgetting has never been examined in detail in humans, " said senior author of the paper Michael Yassa. " We re- port for the first time a specific effect of caffeine on reducing forgetting over 24 hours. " Conducting a double-blind trial, the researchers worked with a test group of people who didn't regularly consume caffeinated products. Five minutes after studying a series of images, the test subjects were given either a placebo(无效对照剂) or a 200-milligram caffeine tablet.
To check the caffeine levels of their test subjects, the research team took saliva samples (唾液样品) from them before they took their tablets and again one, three and 24 hours after- wards.
Both groups of test participants ( those who took the placebo and those who took the caffeine tablet) were tested the following day to see if they could recognize the images they' d seen the previous day.
The test included showing the test subjects another series of images that included some new images , those that were shown the previous day, as well as other images that were similar, but not the same as those they had viewed earlier.
The researchers found that more members of the group who were given the caffeine tablets were able to correctly identify some of the new images as " similar" to previously viewed images rather than incorrectly identifying them as the same.
"We also know that caffeine is associated with health and longevity(长寿) and may havesome protective effects from cognitive decline like Alzheimer' s disease (阿尔茨海默症). " said Yassa.
1.The purpose of the new research is
A. to survey how much caffeine people consume a day
B. to write the paper " Nature Neuroscience"
C. to prove caffeine has cognitive-enhancing effects
D. to examine caffeine ' s memory-strengthening effects in detail
2. During the research ,the researchers did the following things EXCEPT
A. giving the test subjects placebos or caffeine tablets
B. checking the caffeine levels of the test subjects
C. encouraging the test subjects to drink more coffee
D. showing the test subjects series of images
3. How did the test subjects show the caffeine ' s memory-strengthening effects?
A. By recognizing images they ' d seen the previous day.
B. By taking the caffeine tablets instead of placebos.
C. By identifying the new images as the same.
D. By telling the differences between new images.
4. What will the next part of the text possibly talk about?
A. Ways to achieve health and longevity. B. The effects caffeine has on health.
.C. The treatment for Alzheimer' s disease. D. The harmful effects of cognitive decline.
高三英语阅读理解中等难度题
Caffeine not only gives us a daily jump start, but new research suggests it also can strengthen long-term memory.
According to the US Food and Drug Administration, nearly 90 percent of people worldwide consume about 200 milligrams of caffeine each day. That' s equivalent to about one strong cup of coffee a day. Writing in " Nature Neuroscience" , Johns Hopkins University researchers say their findings show that caffeine strengthens certain memories for up t0 24 hours after being taken in.
" We've always known that caffeine has cognitive-enhancing effects (促智效果) , but its ,particular effects on strengthening memories and making them resistant to forgetting has never been examined in detail in humans, " said senior author of the paper Michael Yassa. " We re- port for the first time a specific effect of caffeine on reducing forgetting over 24 hours. " Conducting a double-blind trial, the researchers worked with a test group of people who didn't regularly consume caffeinated products. Five minutes after studying a series of images, the test subjects were given either a placebo(无效对照剂) or a 200-milligram caffeine tablet.
To check the caffeine levels of their test subjects, the research team took saliva samples (唾液样品) from them before they took their tablets and again one, three and 24 hours after- wards.
Both groups of test participants ( those who took the placebo and those who took the caffeine tablet) were tested the following day to see if they could recognize the images they' d seen the previous day.
The test included showing the test subjects another series of images that included some new images , those that were shown the previous day, as well as other images that were similar, but not the same as those they had viewed earlier.
The researchers found that more members of the group who were given the caffeine tablets were able to correctly identify some of the new images as " similar" to previously viewed images rather than incorrectly identifying them as the same.
"We also know that caffeine is associated with health and longevity(长寿) and may havesome protective effects from cognitive decline like Alzheimer' s disease (阿尔茨海默症). " said Yassa.
1.The purpose of the new research is
A. to survey how much caffeine people consume a day
B. to write the paper " Nature Neuroscience"
C. to prove caffeine has cognitive-enhancing effects
D. to examine caffeine ' s memory-strengthening effects in detail
2. During the research ,the researchers did the following things EXCEPT
A. giving the test subjects placebos or caffeine tablets
B. checking the caffeine levels of the test subjects
C. encouraging the test subjects to drink more coffee
D. showing the test subjects series of images
3. How did the test subjects show the caffeine ' s memory-strengthening effects?
A. By recognizing images they ' d seen the previous day.
B. By taking the caffeine tablets instead of placebos.
C. By identifying the new images as the same.
D. By telling the differences between new images.
4. What will the next part of the text possibly talk about?
A. Ways to achieve health and longevity. B. The effects caffeine has on health.
.C. The treatment for Alzheimer' s disease. D. The harmful effects of cognitive decline.
高三英语阅读理解中等难度题查看答案及解析
Caffeine not only gives us a daily jump start, but new research suggests it also can strengthen long-term memory.
According to the US Food and Drug Administration, nearly 90 percent of people worldwide consume about 200 milligrams of caffeine each day. That' s equivalent to about one strong cup of coffee a day. Writing in " Nature Neuroscience" , Johns Hopkins University researchers say their findings show that caffeine strengthens certain memories for up to 24 hours after being taken in.
" We've always known that caffeine has cognitive-enhancing effects (促智效果) , but its particular effects on strengthening memories and making them resistant to forgetting has never been examined in detail in humans, " said senior author of the paper Michael Yassa. " We re- port for the first time a specific effect of caffeine on reducing forgetting over 24 hours. " Conducting a double-blind trial, the researchers worked with a test group of people who didn't regularly consume caffeinated products. Five minutes after studying a series of images, the test subjects were given either a placebo(无效对照剂) or a 200-milligram caffeine tablet.
To check the caffeine levels of their test subjects, the research team took saliva samples (唾液样品) from them before they took their tablets and again one, three and 24 hours afterwards.
Both groups of test participants ( those who took the placebo and those who took the caffeine tablet) were tested the following day to see if they could recognize the images they' d seen the previous day.
The test included showing the test subjects another series of images that included some new images , those that were shown the previous day, as well as other images that were similar, but not the same as those they had viewed earlier.
The researchers found that more members of the group who were given the caffeine tablets were able to correctly identify some of the new images as " similar" to previously viewed images rather than incorrectly identifying them as the same.
"We also know that caffeine is associated with health and longevity(长寿) and may have some protective effects from cognitive decline like Alzheimer' s disease (阿尔茨海默症). " said Yassa.
1.The purpose of the new research is ____________.
A.to examine caffeine ' s memory-strengthening effects in detail
B.to write the paper " Nature Neuroscience"
C.to prove caffeine has cognitive-enhancing effects
D.to survey how much caffeine people consume a day
2. During the research , the researchers did the following things EXCEPT ________.
A.giving the test subjects placebos or caffeine tablets
B.checking the caffeine levels of the test subjects
C.showing the test subjects series of images
D.encouraging the test subjects to drink more coffee
3. How did the test subjects show the caffeine ' s memory-strengthening effects?
A.By taking the caffeine tablets instead of placebos.
B.By recognizing images they ' d seen the previous day.
C.By identifying the new images as the same.
D.By telling the differences between new images.
4.What will the next part of the text possibly talk about?
A.Ways to achieve health and longevity.
B.The harmful effects of cognitive decline.
C.The treatment for Alzheimer' s disease.
D.The effects caffeine has on health.
高三英语阅读理解中等难度题查看答案及解析
完成句子。
1.Not only did it _______ us _______ to nature and give us _______ from heavy school work., it also _______ the friendship among us.
它不仅让我们更接近自然,从繁重的学业中得到放松,也促进了我们之间的友谊。
2.These days, _______ traffic rules and _______ are not _______, _______ serious harm to life and environment. Changing this situation _______ _______ effort on the part of everyone.
近来,违反交通规则和扔垃圾很普遍,造成了对生活和环境的严重危害。改变这种情况需要每个人极大的努力。
3.And third, _______ _______ about your future. Such a _______ _______ towards life can be helpful in _______ your _______.
第三,对未来保持乐观。这样的一种对生活的积极态度有助于提高我们的情绪。
4._______ too much on mouse clicking makes us lazier and less _______ both _______and _______.
过于依赖点击鼠标使我们更懒惰,在精神上和身体上更少创造性。
高三英语其他题中等难度题查看答案及解析
完成句子。
1.Not only did it _______ us _______ to nature and give us _______ from heavy school work. it also _______ the friendship among us.
它不仅让我们更接近自然,从繁重的学业中得到放松,也促进了我们之间的友谊。
2. These days, _______ traffic rules and _______ are not _______, _______ serious harm to life and environment. Changing this situation _______ _______ effort on the part of everyone.
近来,违反交通规则和扔垃圾很普遍,造成了对生活和环境的严重危害。改变这种情况需要每个人极大的努力。
3.And third, _______ _______ about your future. Such a _______ _______ towards life can be helpful in _______ your _______.
第三,对未来保持乐观。这样的一种对生活的积极态度有助于提高我们的情绪。
4. _______ too much on mouse clicking makes us lazier and less _______ both _______and _______.
过于依赖点击鼠标使我们更懒惰,在精神上和身体上更少创造性。
高三英语其他题中等难度题查看答案及解析
Not only ________ give people relaxation and pleasure, but ________ increase their knowledge of any kind.
A. can travel; it can B. travel can; can it
C. can travel; can it D. travel can; it can
高三英语单项填空中等难度题查看答案及解析
---- Putting on a happy face not only helps us make friends but also makes us feel better.
---- _______.
A. I’d love to B. I’m with you on that
C . It’s up to you D. It’s my pleasure
高三英语单项填空中等难度题查看答案及解析
---- Putting on a happy face not only helps us make friends but also makes us feel better.
---- _______.
A.I’d love to | B.I’m with you on that | C.It’s up to you | D.It’s my pleasure |
高三英语单项填空简单题查看答案及解析
—Putting on a happy face not only helps us make friends but also makes us feel better.
—_________.
A. I’ m with you on that B. I’ d love to C. It’ s up to you D. It’ s my pleasure
高三英语单项填空简单题查看答案及解析
—Putting on a happy face not only helps us make friends but also makes us feel better.
—______.
A.I’m with you on that | B.I’d love to | C.It’s up to you | D.It’s my pleasure |
高三英语单项填空简单题查看答案及解析
—Putting on a happy face not only helps us make friends but also makes us feel better.
—________.
A.I’m with you on that B.I’d love to
C.It’s up to you D.It’s my pleasure
高三英语单项填空中等难度题查看答案及解析