Laboratory studies have shown that prolonged exposure to high intensity blue light damages retinal (视网膜的) cells in mice.1.So, why is there the disconnect between blue light's effects on rodent(啮齿类动物) eyes and human eyes?
2.We have protective elements, such as macular pigments (黄斑色素) and the natural blue-blocking ability of the crystalline lens (晶状体). These structures absorb blue light before it reaches the delicate retina.
Just because blue light isn't harming your retina, it doesn't mean your electronic devices are harmless.3.Mounting evidence suggests that screen time before bed increases the time it takes to fall sleep. It also robs you of restorative rapid-eye movement seep, dulls focus, and reduces brain activity the next day.
4.
First, turn off your electronic devices before bed. Outside of the bedroom, when you do look at your screens, lower the brightness.
Second, follow the“20-20-20”rule The American Optometric Association(美国验光学会) defines this rule as taking a 20-second break every 20 minutes to look at something 20 feet in the distance. 5.
Third, use lubricating eye drops before extended computer use. This method will build up the body's natural tears and keep the eye's surface water-bearing.
A.This will allow your eyes to relax.
B.Human eyes are different from rodent eyes.
C.That's why it's so important to have your eyes tested regularly.
D.Because of is wavelength, blue light dos disrupt healthy sleep physiology (生理机能).
E.But epidemiological (流行病学的) studies on real people tell a different story.
F.Consumers often don't think about the impact digital devices might have on their vision.
G.There are ways to make your screen viewing more comfortable and more helpful to seep.
高三英语七选五中等难度题
Laboratory studies have shown that prolonged exposure to high intensity blue light damages retinal (视网膜的) cells in mice.1.So, why is there the disconnect between blue light's effects on rodent(啮齿类动物) eyes and human eyes?
2.We have protective elements, such as macular pigments (黄斑色素) and the natural blue-blocking ability of the crystalline lens (晶状体). These structures absorb blue light before it reaches the delicate retina.
Just because blue light isn't harming your retina, it doesn't mean your electronic devices are harmless.3.Mounting evidence suggests that screen time before bed increases the time it takes to fall sleep. It also robs you of restorative rapid-eye movement seep, dulls focus, and reduces brain activity the next day.
4.
First, turn off your electronic devices before bed. Outside of the bedroom, when you do look at your screens, lower the brightness.
Second, follow the“20-20-20”rule The American Optometric Association(美国验光学会) defines this rule as taking a 20-second break every 20 minutes to look at something 20 feet in the distance. 5.
Third, use lubricating eye drops before extended computer use. This method will build up the body's natural tears and keep the eye's surface water-bearing.
A.This will allow your eyes to relax.
B.Human eyes are different from rodent eyes.
C.That's why it's so important to have your eyes tested regularly.
D.Because of is wavelength, blue light dos disrupt healthy sleep physiology (生理机能).
E.But epidemiological (流行病学的) studies on real people tell a different story.
F.Consumers often don't think about the impact digital devices might have on their vision.
G.There are ways to make your screen viewing more comfortable and more helpful to seep.
高三英语七选五中等难度题查看答案及解析
Various studies have shown that increased spending on education has notled to measurable improvements in learning. Between 1980 and 2008, staff andteachers at U.S. public schools grew roughly twice as fast as students.1.
Universities show similar trends ofincreased administration personnel and costs without greater learning, asdocumented in Richard Arum and Josipa Roksa's recent book Academically Adrift:Limited Learning on College Campuses.
A survey shows that 63% ofemployers say that recent college graduates don't have the skills they need tosucceed and 25% of employers say that entry-level writing skills are lacking.
Some simplistically attribute thedecline in our public education system to the drain of skilled students byprivate schools, but far more significant events were at work.
Public schools worked well untilabout the 1970s.2. It was the underperforming students who werethrown out of public schools and went to private ones.
A prominent reason public schoolsdid well was that many highly qualified women had few options for workingoutside the house other than being teachers or nurses. 3.
Having such a large supply oftalented women teachers meant that society could pay less for their services.Women’s liberation opened up new professional opportunities for women, and,over time, some of the best left teaching as a career option, bringing about agradual decline in the quality of schooling.
4.Large educationbureaucracies and unions came to dominate the landscape, confusing activitywith achievement. Bureaucrats regularly rewrite curriculums, talk nonsenseabout theories of education, and require ever more administrators. The endresult has been that, after all the spending, students have worse math andreading skills than both their foreign peers and earlier generations spendingfar less on education ---- as all the accumulating evidence has now documented.
A.They accepted relatively low pay, difficult working conditions, and gave their very best.
B.In fact, until that time, public schools provided far better education than private ones.
C. Achievement tests have failed to truly reflect the quality of teaching.
D. The heavy teaching loads left them little time and energy for family life.
E.Also around that time, regulations, government, and unions came to dictate pay, prevent adjustments.
F.Yet students showed no additional learning in achievement tests.
高三英语信息匹配中等难度题查看答案及解析
There’s something satisfying about volunteering. Studies have shown that volunteering helps people who donate their time feel more socially connected, thus warding off loneliness and depression. But a growing body of evidence suggests that people who give their time to others might also be rewarded with better physical health, including lower blood pressure and a longer lifespan.
Evidence of volunteerism’s physical effects can be found in a recent study from Carnegie Mellon University, published this month in Psychology and Aging. Adults over age 50 who volunteered on a regular basis were less likely to develop high blood pressure than non-volunteers. High blood pressure is an important indicator of health because it contributes to heart disease, stroke, and premature death.
It’s impossible for this study to prove that volunteering was directly responsible for the lower blood pressure. People who volunteer may be more likely to do other things, like eating a healthy diet or exercise, which lower blood pressure. But the results are in line with other findings on the topic.
How might volunteering contribute to lower blood pressure？Performing volunteer work could increase physical activity among people who aren’t otherwise very active, says leading study author Rodlescia Sneed, a doctoral candidate in social and health psychology at Carnegie Mellon University. It may also reduce stress. “Many people find volunteer work helpful with respect to stress reduction, and we know that stress is very strongly linked to health out-comes,” she says.
A 2012 study in the journal Health Psychology found that participants who volunteered with some regularity lived longer, but only if their intentions were truly altruistic. In other words, they had to be volunteering to help others-not to make themselves feel better.
The Greek philosopher Aristotle once guessed that the essence of life is “To serve others and do good.” If recent research is any indication, serving others might also be the essence of good health.
1.Which can replace the underlined phrase “warding off” in paragraph 1？
A.getting rid of. B.keeping up with.
C.running out of. D.putting up with.
2.Why does the author mention the study from Carnegie Mellon University？
A.To prove the benefit of volunteering to health.
B.To find out volunteerism’s physical effects on heart.
C.To explain the connection between exercise and health.
D.To warn readers the danger of volunteering to blood pressure.
3.What can we learn from what Rodlescia Sneed said？
A.Volunteers are supposed to be more outgoing.
B.Volunteer work can make people lack sports.
C.Taking appropriate exercise can strengthen social connection.
D.Performing volunteer work contributes to reducing stress.
4.What’s the text mainly about？
A.Volunteering can lower blood pressure.
B.Volunteering is beneficial to mental health.
C.Volunteering may be good for body and mind.
D.Volunteering can avoid suffering from heart disease.
高三英语阅读理解中等难度题查看答案及解析
Recent studies have shown that most US graduates receive cash as gifts, though the amount received ______ from person to person．
A．prefers B．promotes C．varies D．suffers
高三英语单项填空中等难度题查看答案及解析
Studies have shown that the right and left ear sound differently.
A. produce B. pronounce
C. process D. download
高三英语单项填空中等难度题查看答案及解析
Studies have shown that the right and left ear sound differently.
A. produce B. pronounce
C. process D. download
高三英语单项填空中等难度题查看答案及解析
Science can't explain the power of pets, but many studies have shown that the company of pets can help lower blood pressure (血压) and raise chances of recovering from a heart attack, reduce loneliness and spread all-round good cheer.
Any owner will tall you how much joy a pet brings. For some, an animal provides more comfort than a husband/wife. A 2002 study by Karen Allen of the State University of New York measured stress (紧张) levels and blood pressure in people - half of them pet owners –while they performed 5 minutes of mental arithmetic (算术) or held a hand in ice water. Subjects completed the tasks alone, with a husband/wife, a close friend or with a pet. People with pets did
It best .Those tested with their animal friends had smaller change in blood pressure and returned
Most quickly to baseline heart rates .With pets in the room ,people also made fewer math mistakes
Than when doing in front of other companions. It seems people feel more released (放松)around
Pets, says Allen, who thinks it may be because pets don’t judge.
A study reported last fall suggests that having a pet dog not only raises your spirits but may also have an effect on your eating habits. Researchers at Northwesterm Memorial Hospital spent a
Year studying 36 fat people and were put on a diet-and-exercise programs; a separate group of
56 fat people without pets were put on a diet program. On average，people lost about 11 pounds，
Or 5% of their body weight .Their dogs did even better，losing an average of 12 pounds，more then
15%of their body weight .Dog owners didn’t lose any more weight than those without dogs but ,say
Researchers，got more exercise overall –mostly with their dogs –and found it worth doing.
1.What does the text mainly discuss?
A．What pets bring to their owners
B．How pets help people calm down
C．people’s opinions of keeping pets
D．Pet’s value in medical research
2.We learn from the text that a person with heart disease has a better chance of getting well if
____________
A．he has a pet companion
B．he has less stress of work
C．he often dose mental arithmetic
D．he is taken care of by his family
3.According to Allen, why did the people do better with pets around when facing stressful tasks?
A．They have lower blood pressure.
B．They become more patient.
C．They are less nervous.
D．They are in higher spirits.
4.The research mentioned in the last paragraph reports that
A．people with dogs did more exercise
B．dogs lost the same weight as people did
C．dogs liked exercise much more than people did
D．people without dogs found the program unhelpful
高三英语阅读理解中等难度题查看答案及解析
D
Science can't explain the power of pets, but many studies have shown that the company of pets can help lower blood pressure (血压) and raise chances of recovering from a heart attack, reduce loneliness and spread all-round good cheer.
Any owner will tell you how much joy a pet brings. For some, an animal provides more comfort than a husband/wife. A 2002 study by Karen Allen of the State University of New York measured stress (紧张) levels and blood pressure in people - half of them pet owners –while they performed 5 minutes of mental arithmetic (算术) or held a hand in ice water. Subjects completed the tasks alone, with a husband/wife, a close friend or with a pet. People with pets did it best. Those tested with their animal friends had smaller change in blood pressure and returned most quickly to baseline heart rates. With pets in the room, people also made fewer math mistakes than when doing in front of other companions. It seems people feel more relaxed (放松)around pets, says Allen, who thinks it may be because pets don't judge.
A study reported last fall suggests that having a pet dog not only raises your spirits but may also have an effect on your eating habits. Researchers at Northwestern Memorial Hospital spent a year studying 36 fat people and their equally fat dogs on diet-and-exercise programs; a separate group of 56 people without pets were put on a diet program. On average, people lost about I1 pounds, or 5% of their body weight. Their dogs did even better, losing an average of 12 pounds, more than 15% of their body weight. Dog owners didn't lose any more weight than those without dogs but, say researchers, got more exercise overall-mostly with their dogs - and found it worth doing.
1.What does the text mainly discuss?
A．What pets bring to their owners.
B．How pets help people calm down.
C．People's opinions of keeping pets.
D．Pet's value in medical research.
2.We learn from the text that a person with heart disease has a better chance of getting well if
A．he has a pet companion
B．he has less stress of work
C．he often does mental arithmetic
D．he is taken care of by his family
3.According to Allen, why did the people do better with pets around when facing stressful tasks?
A．They have lower blood pressure.
B．They become more patient.
C．They are less nervous.
D．They are in higher spirits.
4.The research mentioned in the last paragraph reports that
A．people with dogs did more exercise
B．dogs lost the same weight as people did
C．dogs liked exercise much more than people did
D．people without dogs found the program unhelpful
高三英语阅读理解中等难度题查看答案及解析
Science can't explain the power of pets, but many studies have shown that the company of pets can help lower blood pressure (血压) and raise chances of recovering from a heart attack, reduce loneliness and spread all-round good cheer.
Any owner will tall you how much joy a pet brings. For some, an animal provides more comfort than a husband/wife. A 2002 study by Karen Allen of the State University of New York measured stress (紧张) levels and blood pressure in people - half of them pet owners –while they performed 5 minutes of mental arithmetic (算术) or held a hand in ice water. Subjects completed the tasks alone, with a husband/wife, a close friend or with a pet. People with pets did it best. Those tested with their animal friends had smaller change in blood pressure and returned most quickly to baseline heart rates. With pets in the room, people also made fewer math mistakes than when doing in front of other companions. It seems people feel more relaxed (放松)around pets, says Allen, who thinks it may be because pets don't judge.
A study reported last fall suggests that having a pet dog not only raises your spirits but may also have an effect on your eating habits. Researchers at Northwestern Memorial Hospital spent a year studying 36 fat people and their equally fat dogs on diet-and-exercise programs; a separate group of 56 people without pets were put on a diet program. On average, people lost about I1 pounds, or 5% of their body weight. Their dogs did even better, losing an average of 12 pounds, more than 15% of their body weight. Dog owners didn't lose any more weight than those without dogs but, say researchers, got more exercise overall-mostly with their dogs - and found it worth doing.
1．What does the text mainly discuss?
A．What pets bring to their owners.
B．How pets help people calm down.
C．People's opinions of keeping pets.
D．Pet's value in medical research.
2．We learn from the text that a person with heart disease has a better chance of getting well if
A．he has a pet companion
B．he has less stress of work
C．he often does mental arithmetic
D．he is taken care of by his family
3．According to Allen, why did the people do better with pets around when facing stressful tasks?
A．They have lower blood pressure.
B．They become more patient.
C．They are less nervous.
D．They are in higher spirits.
4．The research mentioned in the last paragraph reports that
A．people with dogs did more exercise
B．dogs lost the same weight as people did
C．dogs liked exercise much more than people did
D．people without dogs found the program unhelpful
高三英语阅读理解简单题查看答案及解析
Science can't explain the power of pets, but many studies have shown that the company of pets can help lower blood pressure (血压) and raise chances of recovering from a heart attack, reduce loneliness and spread all-round good cheer.
Any owner will tall you how much joy a pet brings. For some, an animal provides more comfort than a husband/wife. A 2002 study by Karen Allen of the State University of New York measured stress (紧张) levels and blood pressure in people - half of them pet owners –while they performed 5 minutes of mental arithmetic (算术) or held a hand in ice water. Subjects completed the tasks alone, with a husband/wife, a close friend or with a pet. People with pets did
It best .Those tested with their animal friends had smaller change in blood pressure and returned
Most quickly to baseline heart rates .With pets in the room ,people also made fewer math mistakes
Than when doing in front of other companions. It seems people feel more released (放松)around
Pets, says Allen, who thinks it may be because pets don’t judge.
A study reported last fall suggests that having a pet dog not only raises your spirits but may also have an effect on your eating habits. Researchers at Northwesterm Memorial Hospital spent a
Year studying 36 fat people and were put on a diet-and-exercise programs; a separate group of
56 fat people without pets were put on a diet program. On average，people lost about 11 pounds，
Or 5% of their body weight .Their dogs did even better，losing an average of 12 pounds，more then
15%of their body weight .Dog owners didn’t lose any more weight than those without dogs but ,say
Researchers，got more exercise overall –mostly with their dogs –and found it worth doing.
1. What does the text mainly discuss?
A．What pets bring to their owners
B．How pets help people calm down
C．people’s opinions of keeping pets
D．Pet’s value in medical research
2.We learn from the text that a person with heart disease has a better chance of getting well if
____________
A．he has a pet companion
B．he has less stress of work
C．he often dose mental arithmetic
D．he is taken care of by his family
3.According to Allen, why did the people do better with pets around when facing stressful tasks?
A．They have lower blood pressure.
B．They become more patient.
C．They are less nervous.
D．They are in higher spirits.
4. The research mentioned in the last paragraph reports that
A．people with dogs did more exercise
B．dogs lost the same weight as people did
C．dogs liked exercise much more than people did
D．people without dogs found the program unhelpful
高三英语阅读理解中等难度题查看答案及解析