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Câu hỏi:

18/06/2021 178

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 1 to 8.

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.

What does the passage mainly discuss?

A. risk factors in heart attacks

Đáp án chính xác

B. seasonal and temporal patterns of heart attacks 

C. cardiology in the 1980s

D. diet and stress as factors in heart attacks

Trả lời:

verified Giải bởi Vietjack

Chọn đáp án A

Đoạn văn đang nói đến điều gì?

A. những tác nhân gây đột quỵ

B. tính thời gian và theo mùa của bệnh đột quỵ.

C. nghiên cứu về bệnh tim vào những năm 1980.

D. chế độ ăn và áp lực là nhân tốc gây đột quỵ.

Giải thích: Mở đầu, tác giả nói “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” (Khi bệnh tim là kẻ giết người số một ở Hoa Kỳ, nhà nghiên cứu đã ngày càng quan tâm tới việc xác định yếu tố rủi ro có thể xảy ra gây ra cơn đau tim). Sau đó, những đoạn dưới, tác giả nêu ra một vài lí do như bệnh tim, sinh nhật hay độc thân đều là nguyên nhân dẫn đến đột quỵ.

Câu trả lời này có hữu ích không?

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CÂU HỎI HOT CÙNG CHỦ ĐỀ

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Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

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Câu 3:

Mark the letter A, B, C, or D on your answer sheet to indicate the underlined part that needs correction in each of the following questions.

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Mark the letter A, B, C, or D on your answer sheet to indicate the most suitable response to complete each of the following exchanges.

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Câu 5:

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

Marie Curie, ________, was awarded a Nobel Prize for her work.

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Câu 6:

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

I usually buy my clothes_____. It’s cheaper than going to the dress maker.

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Câu 7:

Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions.

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Câu 8:

Mark the letter A, B, C, or D on your answer sheet to indicate the word(s) OPPOSITE in meaning to the underlined word(s) in each of the following questions.

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Câu 9:

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that is closest in meaning to each of the following questions.

The hostess made every effort to see that her guests got the food and drinks they wanted.

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Câu 10:

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.

He felt very tired. However, he was determined to continue to climb up the mountain.

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Câu 11:

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

Prices quoted in this package include _____ hours of Internet access for one month.

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Câu 12:

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.

She heard the news of the death of her father. She fainted.

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Câu 13:

 

Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.

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Câu 14:

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 1 to 5.

A team of Russian scientists has challenged the theory that the woolly mammoths became extinct 10,000 years ago at the end of the Ice Age. The scientists have reported that the beasts may have survived until 2000 B.C. on an island off the coast of Siberia, where researchers uncovered 29 fossilized woolly mammoth teeth ranging in age from 4,000 to 7,000 years. The question to be asked now is, how did these prehistoric pachyderms survive in their island environment? One possibility is that they adapted to their confined surroundings by decreasing their bulk. This theory is based on their smaller tooth size, which has led scientists to believe that they were only 6 feet tall at the shoulder compared with 10 feet of their full-sized counterpart. But would this be enough to enable them to survive thousands of years beyond that of other mammoths? Researchers are still working to uncover the reasons for this isolated group's belated disappearance.

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Câu 15:

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the

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