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Dạng bài Đọc hiểu lớp 12
Read the following extract from Jess McElhinney's article on health issues and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.
In a study of aspirin's effect on blood clotting in which abstinence from chocolate was required, a large proportion of participants broke the rules.
Their "offence" led to what is believed to be the first biochemical evidence that a few squares of chocolate a day can almost halve the risk of heart attack death by decreasing the tendency of tiny particles (or platelets) to clot in narrow blood vessels.
"What these chocolate offenders taught us is that the chemical in cocoa beans has a biochemical effect similar to aspirin in reducing platelet clumping, which can be fatal if a clot forms and blocks a blood vessel, causing a heart attack," said Diane Becker from Johns Hopkins University in Maryland, USA, who led the study.
Becker cautions that this discovery should not become an excuse to indulge in large amounts of chocolate frequently, since chocolate also contains high amounts of sugar, butter and cream. However just a few squares of dark chocolate the purest form may be just what the doctor ordered.
For almost 20 years researchers have known that chemicals, called flavonoids, most common in dark chocolate, help blood flow and lower blood pressure.
This new finding, presented at the American Heart Association's annual scientific sessions in Chicago this week, identifies the effect of everyday doses of chocolate found in regular foods such as hot chocolate or chocolate bars. This differs from previous studies which have examined the effects of eating unrealistic doses of flavonoids, equivalent to several pounds of chocolate a day.
"Eating a little bit of chocolate or having a drink of hot cocoa as part of a regular diet is probably good for personal health, so long as people don't eat too much of it, and too much of the kind with lots of butter and sugar," said Becker.
In the study, 139 chocolate offenders were disqualified from a larger experiment which aimed to examine the effects of aspirin on blood clotting. Before the study began, all participants were instructed to follow a strict exercise and diet regimen and to refrain from smoking or using foods and drinks known to affect blood-clotting activity, like caffeinated drinks, wine, grapefruit juice and, of course, chocolate.
Platelet samples from both groups (offenders and non-offenders) were run through a mechanical blood vessel system designed to time how long it takes for platelets to clump together. Chocolate lovers' samples were found to clot more slowly, on average taking 130 seconds to block the system. Platelets from those who stayed away from chocolate clotted faster, taking an average of 123 seconds.
Read the following extract from Jess McElhinney's article on health issues and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions.
In a study of aspirin's effect on blood clotting in which abstinence from chocolate was required, a large proportion of participants broke the rules.
Their "offence" led to what is believed to be the first biochemical evidence that a few squares of chocolate a day can almost halve the risk of heart attack death by decreasing the tendency of tiny particles (or platelets) to clot in narrow blood vessels.
"What these chocolate offenders taught us is that the chemical in cocoa beans has a biochemical effect similar to aspirin in reducing platelet clumping, which can be fatal if a clot forms and blocks a blood vessel, causing a heart attack," said Diane Becker from Johns Hopkins University in Maryland, USA, who led the study.
Becker cautions that this discovery should not become an excuse to indulge in large amounts of chocolate frequently, since chocolate also contains high amounts of sugar, butter and cream. However just a few squares of dark chocolate the purest form may be just what the doctor ordered.
For almost 20 years researchers have known that chemicals, called flavonoids, most common in dark chocolate, help blood flow and lower blood pressure.
This new finding, presented at the American Heart Association's annual scientific sessions in Chicago this week, identifies the effect of everyday doses of chocolate found in regular foods such as hot chocolate or chocolate bars. This differs from previous studies which have examined the effects of eating unrealistic doses of flavonoids, equivalent to several pounds of chocolate a day.
"Eating a little bit of chocolate or having a drink of hot cocoa as part of a regular diet is probably good for personal health, so long as people don't eat too much of it, and too much of the kind with lots of butter and sugar," said Becker.
In the study, 139 chocolate offenders were disqualified from a larger experiment which aimed to examine the effects of aspirin on blood clotting. Before the study began, all participants were instructed to follow a strict exercise and diet regimen and to refrain from smoking or using foods and drinks known to affect blood-clotting activity, like caffeinated drinks, wine, grapefruit juice and, of course, chocolate.
Platelet samples from both groups (offenders and non-offenders) were run through a mechanical blood vessel system designed to time how long it takes for platelets to clump together. Chocolate lovers' samples were found to clot more slowly, on average taking 130 seconds to block the system. Platelets from those who stayed away from chocolate clotted faster, taking an average of 123 seconds.
Quảng cáo
Câu 1: According to the findings, what helps lower blood pressure?
A. The most important ingredient in chocolate.
B. The most common chemicals in dark chocolate.
C. The chemical reaction in dark chocolate.
D. The tiny particles in white chocolate
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Đáp án : B(0) bình luận (0) lời giải
Giải chi tiết:
Lời giải sai Bình thường Khá hay Rất Hay
Câu 2: The word "offenders" in paragraph 3 refers to the ____.
A. people who violate laws
B. trouble makers
C. people who produce chocolate
D. people who ate chocolate
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Đáp án : D(0) bình luận (0) lời giải
Giải chi tiết:
Lời giải sai Bình thường Khá hay Rất Hay
Câu 3: What has been found about the relation between aspirin and the chemical in cocoa beans?
A. Similarity
B. Difference
C. Irrelevance
D. Interdependence
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Đáp án : A(0) bình luận (0) lời giải
Giải chi tiết:
Lời giải sai Bình thường Khá hay Rất Hay
Câu 4: The kind of chocolate that can help the heart is identified as _____ chocolate.
A. mixed
B. dark
C. white
D. hot
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Đáp án : B(0) bình luận (0) lời giải
Giải chi tiết:
Lời giải sai Bình thường Khá hay Rất Hay
Câu 5: How does chocolate help the heart and the vascular system?
A. It widens the blood vessels.
B. It helps the heart pumps better.
C. It helps blood flow more easily.
D. It prevents harmful bacteria
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Đáp án : C(0) bình luận (0) lời giải
Giải chi tiết:
Lời giải sai Bình thường Khá hay Rất Hay
Câu 6: Too much of chocolate ____ is not very good for health.
A. with a lot of butter and sugar
B. containing a lot of milk
C. with lots of sugar and cocoa
D. made with artificial sugar
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Đáp án : A(0) bình luận (0) lời giải
Giải chi tiết:
Lời giải sai Bình thường Khá hay Rất Hay
Câu 7: The word "abstinence" can be interpreted as ______.
A. eating some chocolate
B. not eating chocolate
C. not smoking
D. doing exercise
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Đáp án : B(0) bình luận (0) lời giải
Giải chi tiết:
Lời giải sai Bình thường Khá hay Rất Hay
Câu 8: An experiment has found out that the forming of blood clots is ____ in chocolate lovers.
A. stopped
B. moderate
C. faster
D. slower
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Đáp án : D(0) bình luận (0) lời giải
Giải chi tiết:
Lời giải sai Bình thường Khá hay Rất Hay
Câu 9: The word "indulge" in this case is closest in meaning to "____".
A. become much interested in
B. give up oneself totally
C. abandon oneself
D. get heavily involved in
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Đáp án : A(0) bình luận (0) lời giải
Giải chi tiết:
Lời giải sai Bình thường Khá hay Rất Hay
Câu 10: The article has probably taken from ____.
A. ads of medicine
B. a science journal
C. a doctor's prescription
D. a book of instructions
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Đáp án : B(0) bình luận (0) lời giải
Giải chi tiết:
Lời giải sai Bình thường Khá hay Rất Hay
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