B
Advice to “sleep on it” could be well founded, scientists say. After a good night’s sleep a problem that couldn’t be solved the night before can often appear more manageable, although the evidence(证据)until now has been personal experience. But researchers at the University of Luebek in Germany have designed an experiment that shows a good night’s sleep can improve insight(洞察力)and problem-solving.
“If you have some newly-got memories in your brain, sleep acts on these memories and rebuild them, so that after sleep the insight into problem which you could not solve before increases,” said Dr Jan Born, a neuroscientist(神经病学专家)at the university. To test the theory, they taught volunteers two simple rules to help them turn some numbers into a new order.There was also a third,hidden rule,which could help them increase their speed in solving the problem.The researchers divided the volunteers into two groups:half were allowed to sleep after the training while the rest were forced to stay awake.Dr Jan Born and his team noticed that the group that had slept after the training were twice as likely to figure out the third rule as the other group.“Sleep helped,”Born said in a telephone interview.“The important thing is that you have to have a memory representation in your brain of the problem you want to solve and then you sleep,so it can act on the problem.”But Born admitted that he and his team don’t know how rebuilding of memories occurs or what governs it.Pierre Maquet and Perrine Ruby of the University of Liege in Belgium said the experimental evidence supports the suggestions that sleep can help develop creative thinking.Although the role of sleep in human creativity will still be a mystery,the research gives people good reason to fully respect their periods of sleep,they added.
60.The underlined phrase“sleep on it”in Paragraph 1 probably means_________.
A.to delay deciding something until the next day
B.to get as much sleep as possible
C.to go on sleeping without being disturbed
D.to sleep till after the time you usually get up in the morning
61.Jan Born and his team carried out the experiment through________.
A.comparison B.interview C.survey D.imagination
62.It can be inferred from the passage that___________.
A.people should sleep so long as they have time
B.sleep is the only way to solve hard problems
C.people have various periods of sleep D.people know how sleep rebuilds memories
63.What would be the best title for the passage?
A.How Sleep Works. B.Sleep Helps Solve Problems.
C.No Evidence,But Well Founded. D.Born’s Discovery on Sleep.
高三英语阅读理解简单题
B
Advice to “sleep on it” could be well founded, scientists say. After a good night’s sleep a problem that couldn’t be solved the night before can often appear more manageable, although the evidence(证据)until now has been personal experience. But researchers at the University of Luebek in Germany have designed an experiment that shows a good night’s sleep can improve insight(洞察力)and problem-solving.
“If you have some newly-got memories in your brain, sleep acts on these memories and rebuild them, so that after sleep the insight into problem which you could not solve before increases,” said Dr Jan Born, a neuroscientist(神经病学专家)at the university. To test the theory, they taught volunteers two simple rules to help them turn some numbers into a new order.There was also a third,hidden rule,which could help them increase their speed in solving the problem.The researchers divided the volunteers into two groups:half were allowed to sleep after the training while the rest were forced to stay awake.Dr Jan Born and his team noticed that the group that had slept after the training were twice as likely to figure out the third rule as the other group.“Sleep helped,”Born said in a telephone interview.“The important thing is that you have to have a memory representation in your brain of the problem you want to solve and then you sleep,so it can act on the problem.”But Born admitted that he and his team don’t know how rebuilding of memories occurs or what governs it.Pierre Maquet and Perrine Ruby of the University of Liege in Belgium said the experimental evidence supports the suggestions that sleep can help develop creative thinking.Although the role of sleep in human creativity will still be a mystery,the research gives people good reason to fully respect their periods of sleep,they added.
60.The underlined phrase“sleep on it”in Paragraph 1 probably means_________.
A.to delay deciding something until the next day
B.to get as much sleep as possible
C.to go on sleeping without being disturbed
D.to sleep till after the time you usually get up in the morning
61.Jan Born and his team carried out the experiment through________.
A.comparison B.interview C.survey D.imagination
62.It can be inferred from the passage that___________.
A.people should sleep so long as they have time
B.sleep is the only way to solve hard problems
C.people have various periods of sleep D.people know how sleep rebuilds memories
63.What would be the best title for the passage?
A.How Sleep Works. B.Sleep Helps Solve Problems.
C.No Evidence,But Well Founded. D.Born’s Discovery on Sleep.
高三英语阅读理解简单题查看答案及解析
Scientists have found what look like caves on Mars(火星),and say they could be protecting life from the planet’s terrible environment.
Images of the Mars caves from Northern
Arizona University
The first caves discovered beyond the Earth appear as seven mysterious black dots on the pictures sent back by NASA’s Mars Odyssey orbiter.Each as large as a football field,they may be openings into natural caves below the Martian surface.
“If there is life on Mars,there is a good chance you’d find it in caves,”said Jut Wynne,one of the researchers who noticed the features while working on a US Geological Survey Mars Cave Detection Program.
Jonathan Clarke,a geologist with the Mars Society of Australia,yesterday described the discovery as exciting.
One photo taken at night by an infrared imager(红外线成像器) showed one hole to be unusually warm,suggesting hot air trapped during the day is flowing out.
“I said:‘Wow,that’s a cave’,”Dr.Clarke said excitedly.“People have been looking for these for a long time;now we have found them.”
He agreed such caves would be perfect places to hunt for life escaping from the bitterly cold,radiation-soaked(充满辐射的),dry surface.
“Tiny drops of water could collect inside,”he said.“If there are gases coming out,they could provide energy for a whole range of bacteria.A cave is also a protection from radiation;the surface of Mars is exposed to high levels of space radiation.”
The caves probably formed when tube-shaped lava flows(管状岩浆流) spread across the planet long ago.The outside of the tubes cooled,forming solid walls,while something hotter inside allowed the remaining lava to flow out,forming caves.
1.What does the passage mainly talk about?
A.How the caves were formed on Mars.
B.How scientists found these caves on Mars.
C.Caves on Mars may be full of hot air or a sign of life.
D.Scientists have completely recognized the surface of Mars.
2.We can learn from the passage that _______.
A.water has already been found on Mars
B.the scientists found all the caves at night
C.it is certain that there is life in these caves
D.the surface of Mars is bitterly cold,radiation-soaked and dry
3.According to the passage,Dr.Clarke was so excited because _______.
A.such caves could provide energy for life
B.they had finally found the caves on Mars
C.such caves would be perfect places to hunt for life
D.scientists had long been looking for these caves
4.Necessary conditions for life on Mars mentioned in the passage may include _______.
A.lava and energy
B.water and radiation from space
C.gases and lava
D.water and protection from radiation
高三英语阅读理解中等难度题查看答案及解析
Scientists have found living organisms trapped in crystals(晶体) that could be 50,000 years old.
The organisms were found in a hot, but beautiful cave system in Naica, Mexico. These ancient life forms can be seen only with a microscope. Penelope Boston, who leads the Astrobiology Institute at NASA, the space agency of the United States, says the ancient microbes(微生物) were able to live by eating minerals such as iron.
She spoke about the discovery recently at a meeting of the American Association for the Advancement of Science. If the findings are confirmed, they will show how microbes can survive in extreme conditions. Forty different kinds of microbes and some viruses were found in the underground area. The genetic structures of these organisms are 10 percent different from those of their nearest relatives.
The caves in Naica are 800 kilometers deep. They were once used for mining lead. Before the miners began working in the caves, the area was separated from the surface and the outside world. Some of the caves are as big as the large religious centers built during Europe's Middle Ages. There are crystals covering the walls. The caves are so hot that scientists must wear special clothing to keep cool. The clothing keeps the crystals safe from human germs(病菌)or other damage. Boston said the researchers could only work for about 20 minutes at a time before they had to go to a room that was 38 degrees Celsius to cool down.
NASA officials would not let Boston share her findings with scientific experts before last week's announcement. So scientists could not say much about the findings. But Norine Noonan, a biologist with the University of South Florida, said she believed them. "Why are we surprised?" Noonan asked. "As a biologist, I would say life on Earth is extremely tough and extremely colorful."
Boston is also studying microbes commonly found inside caves in other countries, such as Ukraine and the United States. These microbes appear to be impossible to kill. Boston said they show how difficult life on Earth can be.
1.The existence of the ancient microbes relies on _______.
A. surrounding insects B. diverse plants
C. eating minerals D. absorbing air
2.What can we infer about the caves in Naica from the passage?
A. The walls are covered by crystals.
B. The temperature in the caves is quite low.
C. The caves have been explored since they were formed.
D. The environment in the caves is difficult to adapt to.
3.What is the biologist Norine Noonan’s attitude towards the findings?
A. Critical B. Positive.
C. Doubtful. D. Indifferent.
4.What’s the main idea of the passage?
A. Living organisms bring hope to scientific research.
B. Scientists Discover 50,000-year-old “super life” in Mexico.
C. Microbes show great power to survive in terrible conditions.
D. Caves provide living environment for living organisms.
高三英语阅读理解困难题查看答案及解析
Scientists have found living organisms trapped in crystals (晶体) that could be 50,000 years old.
The organisms were found in a hot, but beautiful cave system in Naica, Mexico. These ancient life forms can be seen only with a microscope. Penelope Boston, who leads the Astrobiology Institute at NASA, the space agency of the United States, says the ancient microbes were able to live by eating minerals such as iron.
She spoke about the discovery recently at a meeting of the American Association for the Advancement of Science. If the findings are confirmed, they will show how microbes can survive in extreme conditions. Forty different kinds of microbes and some viruses were found in the underground area. The genetic structures of these organisms are 10 percent different from those of their nearest relatives.
The caves in Naica are 800 kilometers deep. They were once used for mining lead. Before the miners began working in the caves, the area was separated from the surface and the outside world. Some of the caves are as big as the large religious centers built during Europe’s Middle Ages. There are crystals covering the walls. The caves are so hot that scientists must wear special clothing to keep cool. The clothing keeps the crystals safe from human germs (病菌) or other damage. Boston said the researchers could only work for about 20 minutes at a time before they had to go to a room that was 38 degrees Celsius to cool down.
NASA officials would not let Boston share her findings with scientific experts before last week’s announcement. So scientists could not say much about the findings. But Norine Noonan, a biologist with the University of South Florida, said she believed them. “Why are we surprised?”Noonan asked. “ As a biologist, I would say life on Earth is extremely tough and extremely colorful.”
Boston is also studying microbes commonly found inside caves in other countries, such as Ukraine and the United States. These microbes appear to be impossible to kill. Boston said they show how difficult life on Earth can be.
1.The existence of the ancient microbes relies on ________.
A. surrounding insects B. eating minerals
C. diverse plants D. absorbing air
2.What can we infer about the eaves in Naica from the passage?
A. The temperature in the caves is quite low.
B. The environment in the caves is difficult to adapt to.
C. The walls are covered by crystals.
D. The caves have been explored since they were formed.
3.What is the biologist Norine Noonan’s attitude towards the findings?
A. Neutral. B. Doubtful.
C. Positive. D. Indifferent.
4.What’s the main idea of the passage?
A. Living organisms bring hope to scientific research.
B. Caves provide living environment for living organisms.
C. Microbes show great power to survive in terrible conditions.
D. Scientists Discover 50,000-year-old “super life” in Mexico.
高三英语阅读理解中等难度题查看答案及解析
Scientists have found living organisms trapped in crystals (晶体) that could be 50,000 years old.
The organisms were found in a hot, but beautiful cave system in Naica, Mexico. These ancient life forms can be seen only with a microscope. Penelope Boston, who leads the Astrobiology Institute at NASA, the space agency of the United States, says the ancient microbes were able to live by eating minerals such as iron.
She spoke about the discovery recently at a meeting of the American Association for the Advancement of Science. If the findings are confirmed, they will show how microbes can survive in extreme conditions. Forty different kinds of microbes and some viruses were found in the underground area. The genetic structures of these organisms are 10 percent different from those of their nearest relatives.
The caves in Naica are 800 kilometers deep. They were once used for mining lead. Before the miners began working in the caves, the area was separated from the surface and the outside world. Some of the caves are as big as the large religious centers built during Europe’s Middle Ages. There are crystals covering the walls. The caves are so hot that scientists must wear special clothing to keep cool. The clothing keeps the crystals safe from human germs (病菌) or other damage. Boston said the researchers could only work for about 20 minutes at a time before they had to go to a room that was 38 degrees Celsius to cool down.
NASA officials would not let Boston share her findings with scientific experts before last week’s announcement. So scientists could not say much about the findings. But Norine Noonan, a biologist with the University of South Florida, said she believed them. “Why are we surprised?” Noonan asked. “As a biologist, I would say life on earth is extremely tough and extremely colorful.”
Boston is also studying microbes commonly found inside caves in other countries, such as Ukraine and the United States. These microbes appear to be impossible to kill. Boston said they show how difficult life on earth can be.
1.The existence of the ancient microbes relies on .
A. surrounding insects B. eating minerals
C. diverse plants D. absorbing air
2.What can we infer about the caves in Naica from the passage?
A. The walls were built during Middle Ages.
B. The temperature in the caves is quite low.
C. The environment in the caves is difficult to adapt to.
D. The caves have been explored since they were formed.
3.What is the biologist Norine Noonan’s attitude towards the findings?
A. Neutral. B. Doubtful.
C. Positive. D. Indifferent.
4.What’s the main idea of the passage?
A. Living organisms bring hope to scientific research.
B. Caves provide living environment for living organisms.
C. Microbes show great power to survive in terrible conditions.
D. Scientists discover 50,000-year-old “super life” in Mexico.
高三英语阅读理解困难题查看答案及解析
A new study has found that social media could be affecting the sleep of young adults.
The study is a project of researchers at the University of Pittsburgh's School of Medicine. They found that young people who often use social media are more likely to suffer from sleep disorders than those who use social media less. The researchers say doctors should ask young adults about their use of social media when treating sleep issues.
“This is one of the first pieces of evidence that social media use really can influence your sleep.” said Jessica C Levenson. She was the lead author of a report on the study.
The researchers set out to examine the connection between social media use and sleep among young adults. Levenson noted that these young adults are possibly the first “generation to grow up with social media.”
The researchers wanted to find out how often young people used social media sites like Facebook, Twitter, Credit and Tumbler. For the study, they gave questionnaires to nearly 1,800 adults, aged 19 to 32. On average, members of the study group used social media sites one hour a day. They also "visited various social media 30 times per week.”
Thirty percent of the study's participants reported having serious problems with sleeping. Those people who used social media a lot were three times more likely to have a sleep disorder. And those who spent the most time on social media were two times as likely to suffer from sleep disturbances.
Levenson said the number of times a person visits social media is a better predictor of sleep problems than overall time spent on social media. If this is true, she adds, then practices that stop such behaviors may be the most effective.
1.What's the main idea of the text?
A. The researchers focus on social media.
B. The researchers manage to handle sleep problems.
C. Doctors treat young patients.
D. Social media affects sleep.
2.When treating sleep problems, doctors are advised to ________.
A. offer some advice about giving up social media
B. ask the patients about young adults’ use of social media
C. give young adults some medicine
D. ask about the patients' living conditions
3.How did the researchers mainly carry out the study?
A. By doing online research. B. By giving an example.
C. By collecting published data. D. By doing questionnaires.
4.What can be inferred from the text?
A. Men are more likely to suffer from a sleep disorder than women.
B. People often using social media are less likely to have a sleep disorder.
C. Using computers less helps avoid sleep problems completely.
D. Sleep problems can be determined by the times of a person visiting social media.
高三英语阅读理解中等难度题查看答案及解析
Chinese scientists have found a new way to use cells found in human urine (尿液)that could aid in the treatment of a range of nerve disorders.That is a new technique for reprogramming cells in human urine into nerve progenitor cells that can grow into multi-functional nerve and brain cells.
The technique is expected to be used in the study and treatment of nerve disorders such as Parkinson's disease, Alzheimer's disease and other nerve disorders.
Pei Duanqing, a professor at Guangzhou Institutes of Biomedicine and Health, Chinese Academy of Sciences, said his research team has combined an episomal system to deliver reprogramming factors with a chemically defined culture medium to reprogram kidney epithelial(肾表皮) cells in urine into NPCs.
These NPCs, normally only found in the human brain, were later proven to be transgene-free and self-renewing, he said.
"These nerve and brain cells can survive for up to one month when transplanted into the brain of a newborn rat," said Pei. "My team is working hard to understand why our experimental condition allowed the urine cells to become NPCs, because we want to improve the technique and make it more efficient".
Scientists have long searched to treat and study neural disorders by obtaining and transplanting neural stem cells. However, the previous method of getting and using cells from either fetal (胎儿)or adult human tissue remains challenging due to ethical concerns and immune system rejections, he said.
Pei hopes the discovery will be used to generate NPCs from patients with nerve disorders such as Parkinson's disease. "These NPCs from patients may help us discover new drugs for these diseases."
"It is a remarkable advance in the stem cell field. The results and methods obtained from this study will be of great value and significance to the field, " said Fred Gage,a professor with the Salk Institute for Biological Studies.
1.What is the passage mainly about?
A. NPCs are beneficial in treating human diseases.
B. Chinese scientists succeeded in making NPCs from human urine.
C. Chinese scientists have found cures for all diseases.
D. A new technique was used to study the use of human urine
2.Pei and his tean try their best to work hard in order to________.
A. make more contributions to medical study
B. discover another new technique
C. make the technique more perfect
D. treat more patients suffering from bad diseases
3.What is the challenge of making NPCs in the previous method?
A. The ethical comcerns and immune system refusal
B. The difificulties in getting cells from human.
C. The under-developed techniques in medical science.
D. The lack of financial support from the government.
4.From the last paragraph we can infer________.
A. the new technique will be developed in science
B. the results and methods will be applied to treating cancers
C. the study will give a major push to the stem cell field
D. the mew technique will bring great profis
高三英语阅读理解中等难度题查看答案及解析
Global warming could make humans shorter. Scientists claim to have found evidence that it caused the world's first horses 1. (shrink) nearly 50 million years ago. In fact,a team from the universities of Florida and Nebreaks says 2. has found a link between the Earth heating up and the size of mammals-homes,during the last time the world heated up. The scientists used fossils to follow the evolution of homes from their earliest 3. (appear) 56 million years ago. As temperatures went up.their size went 4. . The scientists say that the current warming could have the same effect 5. mammals and could even make humans 6. (small).“Horses started out small,about the size of a small dog. What's 7. (surprise)is that after they first appeared,they then became even smaller and then dramatically increased in size, and that8.(exact)corresponds to the global warming event, followed by cooling.”"It had been known that mammals 9. small during the last warm time, 10. we hadn't realized that temperature specifically was driving the evolution of body size”Dr. Bloch said in the "Science”journal.
高三英语语法填空简单题查看答案及解析
It is not until recently ______ the scientists have found proof of there being water on Mars.
A.when | B.that | C.how | D.what |
高三英语单项填空简单题查看答案及解析
Scientists say they now have proof to support the old-fashioned advice that it’s best to sleep on a problem.They say sleep strengthens the memory and helps the brain organize the masses of information we receive each day.
The lead researcher Bob Stickgold at the Harvard Medical School said, “Sleep helps us draw rules from our experiences.It’s like knowing the difference between dogs and cats even if it’s hard to explain.”
The US research team studied how well students remembered connections between words and symbols, reports New Scientist.They compared how the students performed if they had had a sleep between seeing the words and having the test, and if they had not slept.They found that people were better able to remember lists of related words after a night’s sleep than after the same time spent awake during the day.They also found it easier to remember themes that the words had in common.But they forgot around one in four more themes if they had been awake.
Prof.John Groeger, of Survey University’s Sleep Research Centre, said, “People have been trying for years to find out what the purpose of sleep is, as we know that only certain parts of it have a restorative (促使康复的)value.”
“We form and store huge numbers of experiences in the head every day, and sleep seems to be the way the brain deals with them all.”
1.The phrase “to sleep on a problem” in Paragraph 1 most likely means “________”.
A.to pay full attention to a problem
B.to wait until the next day for a decision
C.to sleep to forget a problem
D.to have difficulty in sleeping
2.In the study by the US research team, students were asked to ________.
A.put together words of similar meanings
B.remember words and their meanings
C.show their knowledge of words
D.make up lists of related words
3.Which of the following may be easier to remember?
A.Themes learned right before the test.
B.Rules from personal experiences.
C.Words learned before a good sleep.
D.Ideas stored together in the brain.
4.What may be the importance of the research?
A.It shows that sleep may help us manage information.
B.It helps find out the common themes of words.
C.It tells us that more sleep can improve health.
D.It proves the value of old-fashioned advice.
高三英语阅读理解中等难度题查看答案及解析