Read the following pasage and mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the questions
As heart disease continues to be the number-one killer in the United States, researchers have become increasingly interested in identifying the potential risk factors that trigger heart attacks. High-fat diets and "life in the fast lane" have long been known to contribute to the high incidence of heart failure. But according to new studies, the list of risk factors may be significantly longer and quite surprising.
Heart failure, for example, appears to have seasonal and temporal patterns. A higher percentage of heart attacks occur in cold weather, and more people experience heart failure on Monday than on any other day of the week. In addition, people are more susceptible to heart attacks in the first few hours after waking. Cardiologists first observed this morning phenomenon in the mid-1980, and have since discovered a number of possible causes. An early-morning rise in blood pressure, heart rate, and concentration of heart stimulating hormones, plus a reduction of blood flow to the heart, may all contribute to the higher incidence of heart attacks between the hours of 8:00 A.M. and 10:00 A.M.
In other studies, both birthdays and bachelorhood have been implicated as risk factors. Statistics reveal that heart attack rates increase significantly for both females and males in the few days immediately preceding and following their birthdays. And unmarried men are more at risk for heart attacks than their married counterparts. Though stress is thought to be linked in some way to all of the aforementioned risk factors, intense research continues in the hope of further comprehending why and how heart failure is triggered .
According to the passage, which of the following is NOT a possible cause of any heart attacks?
A. Decreased blood flow to the heart
B. Increased blood pressure
C. Lower heart rate
D. Increase in hormones
Giải bởi qa.haylamdo.com
C
Kiến thức: Đọc hiểu
Giải thích:
Theo đoạn văn, điều sau đây KHÔNG là nguyên nhân có thể gây ra các cơn đau tim?
A. Giảm lượng máu tới tim B. Tăng huyết áp
C. Nhịp tim thấp hơn D. Tăng hoocmon
Thông tin: An early-morning rise in blood pressure, heart rate, and concentration of heart stimulating hormones, plus a reduction of blood flow to the heart, may all contribute to the higher incidence of heart attacks (Vào buổi sáng sớm sự tăng huyết áp, nhịp tim, và sự tập trung các hoocmon kích thích tim, cộng với việc giảm lượng máu đến tim, có thể góp phần gây ra các cơn đau tim cao hơn)
Đáp án:C
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Điền vào ô 4
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Read the following passage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best first each of the numbered blanks from 1 to 5.
Nowadays people are more aware that wildlife all over the world is in (1)________. Many species of animals are threatened, and could easily become (2)________. if we do not make an effort to protect them. In some cases, animals are hunted for their fur or for other valuable parts of their bodies. Some birds, such as parrots, are
caught (3)________. and sold as pets. For many animals and birds the problem is that their habitat - the place
where they live - is disappearing. More land is used for farms, for houses or industry, and there are fewer open spaces than there once were. Farmers use powerful chemicals to help them to grow better crops, but these chemicals pollute the environment and (4)________. wildlife. The most successful animals on earth - human beings - will soon be the only ones (5)________., unless we can solve this problem.
Điền vào ô 5
