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 44 to 50.
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 many 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
Đáp án C
Dựa theo đoạn văn, điều nào dưới đây KHÔNG là nguyên nhân gây bệnh đột quỵ?
A. giảm lượng máu đi với tim
B. tăng áp lực máu
C. giảm nhịp tim
D. tăng hooc-mon
Giải thích:
Đáp án A có trong bài: “a reduction of blood flow to the heart” (giảm lượng máu tới tim)
Đáp án B có trong bài: “An early-morning rise in blood pressure” (tăng áp lực máu vào sáng sớm)
Đáp án D có trong bài: “concentration of heart stimulating hormones” (tăng hooc-mon)
Đáp án C sai, vì phải là tăng nhịp tim “An early-morning rise in blood pressure, heart rate” (tăng áp lực máu vào sáng sớm, tăng nhịp tim
The school was closed for a month because of serious ………… of fever.
Do you know who ___________ the fact that sound travels in waves?
Mark the letter A, B, C, or D on your answer sheet to indicate the word CLOSEST in meaning to the underlined word in each of the following questions.
A lack of qualifications can be a major obstacle to finding a job.
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.
Jack had to skip breakfast; otherwise, he will be late for class
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.
I wish we had gone somewhere else for the holiday.
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 37 to 43.
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.
With which topic is this passage mainly concerned?
Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
I decided to go to the library as soon as I _______.
The restaurant has a very _______ menu. Every day there are several delicious dishes to choose from
It seems that you have to cope with the stresses and strains of the job, ___________?
Most people prefer ________ at home rather than ________out on rainy days.
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 37 to 43.
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.
According to the passage, some researchers suggest that mammoths became extinct
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.
Lakes occupy less than two percent of the Earth’s surface, yet they help sustain life.
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
"Why didn't you join your friends on the trip?" she asked
Mark the letter A, B, C, or D on your answer sheet to indicate the word CLOSEST in meaning to the underlined word in each of the following questions.
In astronomy, a scale of magnitude from one to six denotes the brightness of a star
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.
It's ages since I last saw a Hollywood film
