High levels of chocolate consumption might be associated with a one third reduction in the risk of developing heart disease, suggests a study published online in the British Medical Journal. The findings confirm results of existing studies that generally agree on a potential beneficial link between chocolate consumption and heart health. However, the authors stress that further studies are needed to test whether chocolate actually causes this reduction or if it can be explained by some other unmeasured factor.
The World Health Organization predicts that by 2030, nearly 23 6 million people will die from heart disease. However, lifestyle and dict are key factors in preventing heart disease, says the paper, A number of recent studies have shown that eating chocolate has a positive influence on human health due to its antioxidant and anti-inflammatory properties. This includes reducing blood pressure and improving insulin sensitivity.
However, the evidence about how eating chocolate affects your heart still remains unclear. So, Dr Oscar Franco and colleagues from the University of Cambridge carried out a large scale review of the existing evidence to evaluate the effects of eating chocolate on cardiovascular(心血管)events like heart attack and stroke.
They analyzed the results of seven studies, involving over 100,000 participants with and without existing heart disease, For each study, they compared the group with the highest chocolate consumption against the group with the lowest consumption.
Five studies reported a beneficial link between higher levels of chocolate consumption and the risk of cardiovascular events. They found that the “highest levels of chocolate consumption were associated with a 37% reduction in cardiovascular disease and a 29% reduction in stroke compared with lowest levels.” No significant reduction was found in relation to heart failure.
The authors say the findings need to be interpreted with caution, in particular because commercially available chocolate is very calorific (around 500 calories for every 100 grams)and eating too much of it could lead to weight gain, risk of diabetes and heart disease.
However, they conclude that given the health benefits of dating chocolate, initiatives to reduce the current fat and sugar content in most chocolate products should be explored.
1.Which statement is NOT true according to the passage?
A. There used to be studies about the beneficial link between chocolate consumption and heart health.
B. Millions of people will die from heart disease according to the WHO
C. There are still other factors that may reduce the risk of heart disease.
D. There is clear evidence about how eating chocolate affects your heart.
2.What are the possible causes of heart disease ?
A. Eating chocolate
B. Unhealthy diet
C. Exercising regularly
D. Drinking coffee.
3.What’s the authors’ attitude towards the findings?
A. cautious
B. doubtful
C. disapproving
D. negative
4.What can be inferred from the last paragraph?
A. We should eat less chocolate.
B. Chocolate benefits our health.
C. We should consider the fat and sugar problem.
D. Eating chocolate will lead to fat gain naturally.
高三英语阅读理解中等难度题
High levels of chocolate consumption might be associated with a one third reduction in the risk of developing heart disease, suggests a study published online in the British Medical Journal. The findings confirm results of existing studies that generally agree on a potential beneficial link between chocolate consumption and heart health. However, the authors stress that further studies are needed to test whether chocolate actually causes this reduction or if it can be explained by some other unmeasured factor.
The World Health Organization predicts that by 2030, nearly 23 6 million people will die from heart disease. However, lifestyle and dict are key factors in preventing heart disease, says the paper, A number of recent studies have shown that eating chocolate has a positive influence on human health due to its antioxidant and anti-inflammatory properties. This includes reducing blood pressure and improving insulin sensitivity.
However, the evidence about how eating chocolate affects your heart still remains unclear. So, Dr Oscar Franco and colleagues from the University of Cambridge carried out a large scale review of the existing evidence to evaluate the effects of eating chocolate on cardiovascular(心血管)events like heart attack and stroke.
They analyzed the results of seven studies, involving over 100,000 participants with and without existing heart disease, For each study, they compared the group with the highest chocolate consumption against the group with the lowest consumption.
Five studies reported a beneficial link between higher levels of chocolate consumption and the risk of cardiovascular events. They found that the “highest levels of chocolate consumption were associated with a 37% reduction in cardiovascular disease and a 29% reduction in stroke compared with lowest levels.” No significant reduction was found in relation to heart failure.
The authors say the findings need to be interpreted with caution, in particular because commercially available chocolate is very calorific (around 500 calories for every 100 grams)and eating too much of it could lead to weight gain, risk of diabetes and heart disease.
However, they conclude that given the health benefits of dating chocolate, initiatives to reduce the current fat and sugar content in most chocolate products should be explored.
1.Which statement is NOT true according to the passage?
A. There used to be studies about the beneficial link between chocolate consumption and heart health.
B. Millions of people will die from heart disease according to the WHO
C. There are still other factors that may reduce the risk of heart disease.
D. There is clear evidence about how eating chocolate affects your heart.
2.What are the possible causes of heart disease ?
A. Eating chocolate
B. Unhealthy diet
C. Exercising regularly
D. Drinking coffee.
3.What’s the authors’ attitude towards the findings?
A. cautious
B. doubtful
C. disapproving
D. negative
4.What can be inferred from the last paragraph?
A. We should eat less chocolate.
B. Chocolate benefits our health.
C. We should consider the fat and sugar problem.
D. Eating chocolate will lead to fat gain naturally.
高三英语阅读理解中等难度题查看答案及解析
Usually there might be a lot of accidents in the heavy fog. I happened to witness _______ this morning.
A. it B. those
C. one D. that
高三英语单项填空中等难度题查看答案及解析
(2013·临沂市一模)Usually there might be a lot of accidents in the heavy fog.I happened to witness ________ this morning.
A．it B．those
C．each D．one
高三英语单项填空中等难度题查看答案及解析
Scientists have always been interested in the high level of organization in ant societies. American researchers have watched ants build life-saving rafts(筏子) to keep afloat during floods. They also have documented how ant colonies choose their next queen — the female whose job is to produce eggs rather than seek food for others.
New technology is helping to improve researchers’ understanding of the insects. But there is still a lot to be learned. Fire ants living in Brazilian forests are perfectly at home in an environment where flooding is common. To save themselves, the insects connect their legs together and create floating rafts. Some ant rafts can be up to 20 centimeters wide.
David Hu, who is a mechanical engineer with the Georgia Institute of Technology, also known as Georgia Tech, says, “If you have 100 ants, which means 600 legs, 99 percent of those legs will be connected to a neighbor. So they’re very, very good at maintaining this network.”
David Hu and other Georgia Tech researchers want to study ants and the secret of their engineering. They freeze ant rafts and then look at them with the help of computed technology, or CT, images. The pictures show that larger ants serve in central positions to which smaller ants hold. The larger ants form pockets of air that keep the insects afloat.
Scientists say small robots or materials that can change shape could be programmed in a similar way, working towards a shared goal.
Researchers at North Carolina State University are also studying ants. They examined how Indian jumping ants choose the leader of the colony when they lose their top female or queen.
1.The duty of the queen ants is to_____.
A. seek food B. keep organized
C. lay eggs D. keep guard
2.The author takes fire ants as an example to tell us _____.
A. how ants seek food perfectly B. How ants save themselves from floods
C. how ants communicate D. How ants connect their legs together
3.Which of the following is true according to the passage?
A. Ants know the way to form a harmonious society.
B. The Georgia Tech researchers first discovered Indian jumping ants.
C. All the worker ants in the colony are physically larger.
D. Small and shaped-changeable things might work just like ants do.
高三英语阅读理解简单题查看答案及解析
Scientists say they have found high levels of small plastic particles(颗粒) in Arctic snow. A German-Swiss research team collected snow samples(样本）from the Arctic and other areas. They included northern Germany, the Bavarian and Swiss Alps, and the North Sea island of Heligoland.When the researchers examined the samples in a laboratory, they were surprised to find very high levels of microplastics.
Microplastics are very small pieces of plastic. These plastic particles are generally smaller than 5 millimeters in length. They come from the breakdown of man-made plastic products and industrial waste.
The study found the highest levels of microplastics came from the Bavarian Alps. One snow sample from the area had 154,000 microplastic particles per liter. Samples collected from the Arctic had much lower levels. However, even samples from the Arctic contained up to 14,000 particles per liter.
The study also attempted to explore how some of the material could have been carried in the atmosphere. A limited number of earlier studies did find microplastics in the air of some cities, including Paris, Tehran and Dongguan, China.
Bergmann Melanie co-wrote the report on the new study. She believes the new study clearly shows that “the majority of the microplastic in the snow comes from the air.” The new study suggests that much of the microplastic found in Europe and the Arctic comes from the atmosphere and snow.
While there is growing concern about the effect of microplastics on the environment, scientists are still studying their possible harmful effects on humans and animals. “I hope the new study will lead to more research on this issue. I think microscopic plastic particles should be included in worldwide observations of air pollution levels.We really need to know what effects microplastics have on humans, especially if inhaled with the air that we breathe.” Bergmann said.
1.Why did scientists collect samples from so many places in paragragh 1?
A.To make the research convincing.
B.To attract people to explore there.
C.To measure the length of microplastics .
D.To examine the samples easily in the lab.
2.What is the second paragraph mainly about?
A.The risks of microplastics.
B.The transport of microplastics.
C.The breakdown of plastic products.
D.The description of microplastics.
3.What did the research team find about microplastics?
A.Many people threw them away at the Alps.
B.They were delivered to remote areas through air.
C.They could be caught sight of in the air.
D.They had no great effect on the environment.
4.What can be inferred from what Bergmann said in the last paragraph?
A.Scientists are worried about the the influence of microplastics.
B.We have found a practical solution to the environment problem.
C.The effect of microplastics on human must be urgently researched.
D.There is no need to change observations of air pollution levels.
高三英语阅读理解中等难度题查看答案及解析
It’s the sort of work that _______a high level of concentration.
A. calls for B. makes up C. lies in D. stands for
高三英语单项填空中等难度题查看答案及解析
Anxiety about social status leads to high levels of stress, which ________ leads to health problems.
A.in turn B.in order C.in fact D.in short
高三英语单项填空中等难度题查看答案及解析
It’s the sort of work that ________ a high level of concentration.
A．calls for B．makes up
C．lies in D．stands for
高三英语单项填空中等难度题查看答案及解析
It’s the sort of work that ________ a high level of concentration.
A. calls for B. makes up C. lies in D. stands for
高三英语单项填空简单题查看答案及解析
As an excellent translator , he reached a high level of ______ in his English.
A. competence B. independence C. intelligence D. experience
高三英语单项填空简单题查看答案及解析