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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 answer to each of the questions. The food we eat seems to have profound effects on our health. Although science has made enormous steps in making food more fit to eat, it has, at the same time, made many foods unfit to eat. Some research has shown that perhaps eighty percent of all human illnesses are related to diet and forty percent of cancer is related to the diet as well, especially cancer of the colon. People of different cultures are more prone to contact certain illnesses because of the characteristic foods they consume. That food is related to illness is not a new discovery. In 1945, government researchers realized that nitrates nitrites (commonly used to preserve color in meat) as well as other food additives caused cancer. Yet, these carcinogenic additives remain in our food, and it becomes more difficult all the time to know which ingredients on the packaging label of processed food are helpful or harmful. The additives that we eat are not all so direct. Farmers often give penicillin to cattle and poultry, and because of this, penicillin has been found in the milk of treated cows. Sometimes similar drugs are administered to animals not for medical purposes, but for financial reasons. The farmers are simply trying to fatten the animals in order to obtain a higher price on the market. Although the Food and Drug Administration (FDA) has tried repeatedly to control these procedures, the practices continue. A healthy diet is directly related to good health. Often we are unaware of detrimental substances we ingest. Sometimes well-meaning farmers or others who do not realize the consequences add these substances to food without our knowledge. The word "prone" is nearest meaning to ________ . 

Xem chi tiết 2.1 K lượt xem 5 năm trước

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. The food we eat seems to have profound effects on our health. Although science has made enormous steps in making food more fit to eat, it has, at the same time, made many foods unfit to eat. Some research has shown that perhaps eighty percent of all human illnesses are related to diet and forty percent of cancer is related to the diet as well, especially cancer of the colon. People of different cultures are more prone to contact certain illnesses because of the characteristic foods they consume. That food is related to illness is not a new discovery. In 1945, government researchers realized that nitrates nitrites (commonly used to preserve color in meat) as well as other food additives caused cancer. Yet, these carcinogenic additives remain in our food, and it becomes more difficult all the time to know which ingredients on the packaging label of processed food are helpful or harmful. The additives that we eat are not all so direct. Farmers often give penicillin to cattle and poultry, and because of this, penicillin has been found in the milk of treated cows. Sometimes similar drugs are administered to animals not for medical purposes, but for financial reasons. The farmers are simply trying to fatten the animals in order to obtain a higher price on the market. Although the Food and Drug Administration (FDA) has tried repeatedly to control these procedures, the practices continue. A healthy diet is directly related to good health. Often we are unaware of detrimental substances we ingest. Sometimes well-meaning farmers or others who do not realize the consequences add these substances to food without our knowledge. How has science done to disservice to people? 

Xem chi tiết 4.2 K lượt xem 5 năm trước

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate thecorrect word or phrase that best fits each of the numbered blanks.Education is more important today than ever before. It helps people acquire the skills they need for such everyday  (1)_______  as reading a newspaper or managing their money. It also gives them the specialized training they may need to  (2)_______ for a job or career. For example, a person must meet certain educational requirements and obtain a  (3)_______  or certificate before he can practice law or medicine. Many fields, like computer operation or police work,  (4)_______  satisfactory completion of special training courses.Education is also important  (5)_______  it helps people get more out of life. It increases their knowledge and understanding of the world. It helps them acquire the skills that make life more interesting and enjoyable,  (6)_______  the skills needed to participate in a sport, paint a picture, or play a musical  (7)_______ . Such education becomes  (8)_______  important as people gain more and more leisure time.Education also helps people adjust to change. This habit has become necessary because social changes today take place with increasing speed and  (9)_______  the lives of more and more people. Education can help a person understand these changes and provide him  (10)_______  the skills for adjusting to them.Điền vào ô 10

Xem chi tiết 1 K lượt xem 5 năm trước

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate thecorrect word or phrase that best fits each of the numbered blanks.Education is more important today than ever before. It helps people acquire the skills they need for such everyday  (1)_______  as reading a newspaper or managing their money. It also gives them the specialized training they may need to  (2)_______ for a job or career. For example, a person must meet certain educational requirements and obtain a  (3)_______  or certificate before he can practice law or medicine. Many fields, like computer operation or police work,  (4)_______  satisfactory completion of special training courses.Education is also important  (5)_______  it helps people get more out of life. It increases their knowledge and understanding of the world. It helps them acquire the skills that make life more interesting and enjoyable,  (6)_______  the skills needed to participate in a sport, paint a picture, or play a musical  (7)_______ . Such education becomes  (8)_______  important as people gain more and more leisure time.Education also helps people adjust to change. This habit has become necessary because social changes today take place with increasing speed and  (9)_______  the lives of more and more people. Education can help a person understand these changes and provide him  (10)_______  the skills for adjusting to them.Điền vào ô 8

Xem chi tiết 443 lượt xem 5 năm trước

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate thecorrect word or phrase that best fits each of the numbered blanks.Education is more important today than ever before. It helps people acquire the skills they need for such everyday  (1)_______  as reading a newspaper or managing their money. It also gives them the specialized training they may need to  (2)_______ for a job or career. For example, a person must meet certain educational requirements and obtain a  (3)_______  or certificate before he can practice law or medicine. Many fields, like computer operation or police work,  (4)_______  satisfactory completion of special training courses.Education is also important  (5)_______  it helps people get more out of life. It increases their knowledge and understanding of the world. It helps them acquire the skills that make life more interesting and enjoyable,  (6)_______  the skills needed to participate in a sport, paint a picture, or play a musical  (7)_______ . Such education becomes  (8)_______  important as people gain more and more leisure time.Education also helps people adjust to change. This habit has become necessary because social changes today take place with increasing speed and  (9)_______  the lives of more and more people. Education can help a person understand these changes and provide him  (10)_______  the skills for adjusting to them.Điền vào ô 9

Xem chi tiết 823 lượt xem 5 năm trước

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate thecorrect word or phrase that best fits each of the numbered blanks.Education is more important today than ever before. It helps people acquire the skills they need for such everyday  (1)_______  as reading a newspaper or managing their money. It also gives them the specialized training they may need to  (2)_______ for a job or career. For example, a person must meet certain educational requirements and obtain a  (3)_______  or certificate before he can practice law or medicine. Many fields, like computer operation or police work,  (4)_______  satisfactory completion of special training courses.Education is also important  (5)_______  it helps people get more out of life. It increases their knowledge and understanding of the world. It helps them acquire the skills that make life more interesting and enjoyable,  (6)_______  the skills needed to participate in a sport, paint a picture, or play a musical  (7)_______ . Such education becomes  (8)_______  important as people gain more and more leisure time.Education also helps people adjust to change. This habit has become necessary because social changes today take place with increasing speed and  (9)_______  the lives of more and more people. Education can help a person understand these changes and provide him  (10)_______  the skills for adjusting to them.Điền vào ô 7

Xem chi tiết 447 lượt xem 5 năm trước

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate thecorrect word or phrase that best fits each of the numbered blanks.Education is more important today than ever before. It helps people acquire the skills they need for such everyday  (1)_______  as reading a newspaper or managing their money. It also gives them the specialized training they may need to  (2)_______ for a job or career. For example, a person must meet certain educational requirements and obtain a  (3)_______  or certificate before he can practice law or medicine. Many fields, like computer operation or police work,  (4)_______  satisfactory completion of special training courses.Education is also important  (5)_______  it helps people get more out of life. It increases their knowledge and understanding of the world. It helps them acquire the skills that make life more interesting and enjoyable,  (6)_______  the skills needed to participate in a sport, paint a picture, or play a musical  (7)_______ . Such education becomes  (8)_______  important as people gain more and more leisure time.Education also helps people adjust to change. This habit has become necessary because social changes today take place with increasing speed and  (9)_______  the lives of more and more people. Education can help a person understand these changes and provide him  (10)_______  the skills for adjusting to them.Điền vào ô 6

Xem chi tiết 1 K lượt xem 5 năm trước

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate thecorrect word or phrase that best fits each of the numbered blanks.Education is more important today than ever before. It helps people acquire the skills they need for such everyday  (1)_______  as reading a newspaper or managing their money. It also gives them the specialized training they may need to  (2)_______ for a job or career. For example, a person must meet certain educational requirements and obtain a  (3)_______  or certificate before he can practice law or medicine. Many fields, like computer operation or police work,  (4)_______  satisfactory completion of special training courses.Education is also important  (5)_______  it helps people get more out of life. It increases their knowledge and understanding of the world. It helps them acquire the skills that make life more interesting and enjoyable,  (6)_______  the skills needed to participate in a sport, paint a picture, or play a musical  (7)_______ . Such education becomes  (8)_______  important as people gain more and more leisure time.Education also helps people adjust to change. This habit has become necessary because social changes today take place with increasing speed and  (9)_______  the lives of more and more people. Education can help a person understand these changes and provide him  (10)_______  the skills for adjusting to them.Điền vào ô 5

Xem chi tiết 872 lượt xem 5 năm trước

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate thecorrect word or phrase that best fits each of the numbered blanks.Education is more important today than ever before. It helps people acquire the skills they need for such everyday  (1)_______  as reading a newspaper or managing their money. It also gives them the specialized training they may need to  (2)_______ for a job or career. For example, a person must meet certain educational requirements and obtain a  (3)_______  or certificate before he can practice law or medicine. Many fields, like computer operation or police work,  (4)_______  satisfactory completion of special training courses.Education is also important  (5)_______  it helps people get more out of life. It increases their knowledge and understanding of the world. It helps them acquire the skills that make life more interesting and enjoyable,  (6)_______  the skills needed to participate in a sport, paint a picture, or play a musical  (7)_______ . Such education becomes  (8)_______  important as people gain more and more leisure time.Education also helps people adjust to change. This habit has become necessary because social changes today take place with increasing speed and  (9)_______  the lives of more and more people. Education can help a person understand these changes and provide him  (10)_______  the skills for adjusting to them.Điền vào ô 4

Xem chi tiết 843 lượt xem 5 năm trước

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate thecorrect word or phrase that best fits each of the numbered blanks.Education is more important today than ever before. It helps people acquire the skills they need for such everyday  (1)_______  as reading a newspaper or managing their money. It also gives them the specialized training they may need to  (2)_______ for a job or career. For example, a person must meet certain educational requirements and obtain a  (3)_______  or certificate before he can practice law or medicine. Many fields, like computer operation or police work,  (4)_______  satisfactory completion of special training courses.Education is also important  (5)_______  it helps people get more out of life. It increases their knowledge and understanding of the world. It helps them acquire the skills that make life more interesting and enjoyable,  (6)_______  the skills needed to participate in a sport, paint a picture, or play a musical  (7)_______ . Such education becomes  (8)_______  important as people gain more and more leisure time.Education also helps people adjust to change. This habit has become necessary because social changes today take place with increasing speed and  (9)_______  the lives of more and more people. Education can help a person understand these changes and provide him  (10)_______  the skills for adjusting to them.Điền vào ô 3

Xem chi tiết 260 lượt xem 5 năm trước

Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate thecorrect word or phrase that best fits each of the numbered blanks.Education is more important today than ever before. It helps people acquire the skills they need for such everyday  (1)_______  as reading a newspaper or managing their money. It also gives them the specialized training they may need to  (2)_______ for a job or career. For example, a person must meet certain educational requirements and obtain a  (3)_______  or certificate before he can practice law or medicine. Many fields, like computer operation or police work,  (4)_______  satisfactory completion of special training courses.Education is also important  (5)_______  it helps people get more out of life. It increases their knowledge and understanding of the world. It helps them acquire the skills that make life more interesting and enjoyable,  (6)_______  the skills needed to participate in a sport, paint a picture, or play a musical  (7)_______ . Such education becomes  (8)_______  important as people gain more and more leisure time.Education also helps people adjust to change. This habit has become necessary because social changes today take place with increasing speed and  (9)_______  the lives of more and more people. Education can help a person understand these changes and provide him  (10)_______  the skills for adjusting to them.Điền vào ô 1

Xem chi tiết 454 lượt xem 5 năm trước

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 following questions.A survey is a study, generally in the form of an interview or a ques­tionnaire, which provides information concerning how people think and act. In the United States, the best-known surveys are the Gallup poll and the Harris poll. As anyone who watches the news during presiden­tial campaigns knows, these polls have become an important part of political life in the United States.North Americans are familiar with the many "person on the street" interviews on local television news shows. While such interviews can be highly entertaining, they are not necessarily an accurate indication of public opinion. First, they reflect the opinions of only those people who appear at a certain location. Thus, such samples can be biased in favor of commuters, middle-class shoppers, or factory workers, depending on which area the new people select. Second, television interviews tend to attract outgoing people who are willing to appear on the air, while they frighten away others who may feel intimidated by a camera. A survey must be based on a precise, representative sampling if it is to genu­inely reflect a broad range of the population.In preparing to conduct a survey, sociologists must exercise great care in the wording of questions. An effective survey question must be simple and clear enough for people to understand it. It must also be specific enough so that there are no problems in interpreting the re­sults. Even questions that are less structured must be carefully phrased in order to elicit the type of information desired. Surveys can be indispensable sources of information, but only if the sampling is done properly and the questions are worded accurately.There are two main forms of surveys: the interview and the ques­tionnaire. Each of these forms of survey research has its advantages. An interviewer can obtain a high response rate because people find it more difficult to turn down a personal request for an interview than to throw away a written questionnaire. In addition, an interviewer can go beyond written questions and probe for a subject's underlying feelings and reasons. However, questionnaires have the advantage of being cheaper and more consistentThe word "indispensable"  is closest in meaning to______.

Xem chi tiết 1.4 K lượt xem 5 năm trước

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 following questions.A survey is a study, generally in the form of an interview or a ques­tionnaire, which provides information concerning how people think and act. In the United States, the best-known surveys are the Gallup poll and the Harris poll. As anyone who watches the news during presiden­tial campaigns knows, these polls have become an important part of political life in the United States.North Americans are familiar with the many "person on the street" interviews on local television news shows. While such interviews can be highly entertaining, they are not necessarily an accurate indication of public opinion. First, they reflect the opinions of only those people who appear at a certain location. Thus, such samples can be biased in favor of commuters, middle-class shoppers, or factory workers, depending on which area the new people select. Second, television interviews tend to attract outgoing people who are willing to appear on the air, while they frighten away others who may feel intimidated by a camera. A survey must be based on a precise, representative sampling if it is to genu­inely reflect a broad range of the population.In preparing to conduct a survey, sociologists must exercise great care in the wording of questions. An effective survey question must be simple and clear enough for people to understand it. It must also be specific enough so that there are no problems in interpreting the re­sults. Even questions that are less structured must be carefully phrased in order to elicit the type of information desired. Surveys can be indispensable sources of information, but only if the sampling is done properly and the questions are worded accurately.There are two main forms of surveys: the interview and the ques­tionnaire. Each of these forms of survey research has its advantages. An interviewer can obtain a high response rate because people find it more difficult to turn down a personal request for an interview than to throw away a written questionnaire. In addition, an interviewer can go beyond written questions and probe for a subject's underlying feelings and reasons. However, questionnaires have the advantage of being cheaper and more consistentAccording to paragraph 3, which of the following is most important for an effective survey?

Xem chi tiết 401 lượt xem 5 năm trước

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 following questions.A survey is a study, generally in the form of an interview or a ques­tionnaire, which provides information concerning how people think and act. In the United States, the best-known surveys are the Gallup poll and the Harris poll. As anyone who watches the news during presiden­tial campaigns knows, these polls have become an important part of political life in the United States.North Americans are familiar with the many "person on the street" interviews on local television news shows. While such interviews can be highly entertaining, they are not necessarily an accurate indication of public opinion. First, they reflect the opinions of only those people who appear at a certain location. Thus, such samples can be biased in favor of commuters, middle-class shoppers, or factory workers, depending on which area the new people select. Second, television interviews tend to attract outgoing people who are willing to appear on the air, while they frighten away others who may feel intimidated by a camera. A survey must be based on a precise, representative sampling if it is to genu­inely reflect a broad range of the population.In preparing to conduct a survey, sociologists must exercise great care in the wording of questions. An effective survey question must be simple and clear enough for people to understand it. It must also be specific enough so that there are no problems in interpreting the re­sults. Even questions that are less structured must be carefully phrased in order to elicit the type of information desired. Surveys can be indispensable sources of information, but only if the sampling is done properly and the questions are worded accurately.There are two main forms of surveys: the interview and the ques­tionnaire. Each of these forms of survey research has its advantages. An interviewer can obtain a high response rate because people find it more difficult to turn down a personal request for an interview than to throw away a written questionnaire. In addition, an interviewer can go beyond written questions and probe for a subject's underlying feelings and reasons. However, questionnaires have the advantage of being cheaper and more consistentWhat does the passage mainly discuss?

Xem chi tiết 226 lượt xem 5 năm trước

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 following questions.A survey is a study, generally in the form of an interview or a ques­tionnaire, which provides information concerning how people think and act. In the United States, the best-known surveys are the Gallup poll and the Harris poll. As anyone who watches the news during presiden­tial campaigns knows, these polls have become an important part of political life in the United States.North Americans are familiar with the many "person on the street" interviews on local television news shows. While such interviews can be highly entertaining, they are not necessarily an accurate indication of public opinion. First, they reflect the opinions of only those people who appear at a certain location. Thus, such samples can be biased in favor of commuters, middle-class shoppers, or factory workers, depending on which area the new people select. Second, television interviews tend to attract outgoing people who are willing to appear on the air, while they frighten away others who may feel intimidated by a camera. A survey must be based on a precise, representative sampling if it is to genu­inely reflect a broad range of the population.In preparing to conduct a survey, sociologists must exercise great care in the wording of questions. An effective survey question must be simple and clear enough for people to understand it. It must also be specific enough so that there are no problems in interpreting the re­sults. Even questions that are less structured must be carefully phrased in order to elicit the type of information desired. Surveys can be indispensable sources of information, but only if the sampling is done properly and the questions are worded accurately.There are two main forms of surveys: the interview and the ques­tionnaire. Each of these forms of survey research has its advantages. An interviewer can obtain a high response rate because people find it more difficult to turn down a personal request for an interview than to throw away a written questionnaire. In addition, an interviewer can go beyond written questions and probe for a subject's underlying feelings and reasons. However, questionnaires have the advantage of being cheaper and more consistentThe word "they" refers to ______.

Xem chi tiết 301 lượt xem 5 năm trước

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 following questions.A survey is a study, generally in the form of an interview or a ques­tionnaire, which provides information concerning how people think and act. In the United States, the best-known surveys are the Gallup poll and the Harris poll. As anyone who watches the news during presiden­tial campaigns knows, these polls have become an important part of political life in the United States.North Americans are familiar with the many "person on the street" interviews on local television news shows. While such interviews can be highly entertaining, they are not necessarily an accurate indication of public opinion. First, they reflect the opinions of only those people who appear at a certain location. Thus, such samples can be biased in favor of commuters, middle-class shoppers, or factory workers, depending on which area the new people select. Second, television interviews tend to attract outgoing people who are willing to appear on the air, while they frighten away others who may feel intimidated by a camera. A survey must be based on a precise, representative sampling if it is to genu­inely reflect a broad range of the population.In preparing to conduct a survey, sociologists must exercise great care in the wording of questions. An effective survey question must be simple and clear enough for people to understand it. It must also be specific enough so that there are no problems in interpreting the re­sults. Even questions that are less structured must be carefully phrased in order to elicit the type of information desired. Surveys can be indispensable sources of information, but only if the sampling is done properly and the questions are worded accurately.There are two main forms of surveys: the interview and the ques­tionnaire. Each of these forms of survey research has its advantages. An interviewer can obtain a high response rate because people find it more difficult to turn down a personal request for an interview than to throw away a written questionnaire. In addition, an interviewer can go beyond written questions and probe for a subject's underlying feelings and reasons. However, questionnaires have the advantage of being cheaper and more consistentWhich word is given definition in the text?

Xem chi tiết 1.1 K lượt xem 5 năm trước

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 following questions.A survey is a study, generally in the form of an interview or a ques­tionnaire, which provides information concerning how people think and act. In the United States, the best-known surveys are the Gallup poll and the Harris poll. As anyone who watches the news during presiden­tial campaigns knows, these polls have become an important part of political life in the United States.North Americans are familiar with the many "person on the street" interviews on local television news shows. While such interviews can be highly entertaining, they are not necessarily an accurate indication of public opinion. First, they reflect the opinions of only those people who appear at a certain location. Thus, such samples can be biased in favor of commuters, middle-class shoppers, or factory workers, depending on which area the new people select. Second, television interviews tend to attract outgoing people who are willing to appear on the air, while they frighten away others who may feel intimidated by a camera. A survey must be based on a precise, representative sampling if it is to genu­inely reflect a broad range of the population.In preparing to conduct a survey, sociologists must exercise great care in the wording of questions. An effective survey question must be simple and clear enough for people to understand it. It must also be specific enough so that there are no problems in interpreting the re­sults. Even questions that are less structured must be carefully phrased in order to elicit the type of information desired. Surveys can be indispensable sources of information, but only if the sampling is done properly and the questions are worded accurately.There are two main forms of surveys: the interview and the ques­tionnaire. Each of these forms of survey research has its advantages. An interviewer can obtain a high response rate because people find it more difficult to turn down a personal request for an interview than to throw away a written questionnaire. In addition, an interviewer can go beyond written questions and probe for a subject's underlying feelings and reasons. However, questionnaires have the advantage of being cheaper and more consistentAccording to the reading passage, there are ____ main categories of surveys

Xem chi tiết 1.1 K lượt xem 5 năm trước

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 following questions.A survey is a study, generally in the form of an interview or a ques­tionnaire, which provides information concerning how people think and act. In the United States, the best-known surveys are the Gallup poll and the Harris poll. As anyone who watches the news during presiden­tial campaigns knows, these polls have become an important part of political life in the United States.North Americans are familiar with the many "person on the street" interviews on local television news shows. While such interviews can be highly entertaining, they are not necessarily an accurate indication of public opinion. First, they reflect the opinions of only those people who appear at a certain location. Thus, such samples can be biased in favor of commuters, middle-class shoppers, or factory workers, depending on which area the new people select. Second, television interviews tend to attract outgoing people who are willing to appear on the air, while they frighten away others who may feel intimidated by a camera. A survey must be based on a precise, representative sampling if it is to genu­inely reflect a broad range of the population.In preparing to conduct a survey, sociologists must exercise great care in the wording of questions. An effective survey question must be simple and clear enough for people to understand it. It must also be specific enough so that there are no problems in interpreting the re­sults. Even questions that are less structured must be carefully phrased in order to elicit the type of information desired. Surveys can be indispensable sources of information, but only if the sampling is done properly and the questions are worded accurately.There are two main forms of surveys: the interview and the ques­tionnaire. Each of these forms of survey research has its advantages. An interviewer can obtain a high response rate because people find it more difficult to turn down a personal request for an interview than to throw away a written questionnaire. In addition, an interviewer can go beyond written questions and probe for a subject's underlying feelings and reasons. However, questionnaires have the advantage of being cheaper and more consistentThe word "precise"  is closest in meaning to______.

Xem chi tiết 1.8 K lượt xem 5 năm trước

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 following questions.A survey is a study, generally in the form of an interview or a ques­tionnaire, which provides information concerning how people think and act. In the United States, the best-known surveys are the Gallup poll and the Harris poll. As anyone who watches the news during presiden­tial campaigns knows, these polls have become an important part of political life in the United States.North Americans are familiar with the many "person on the street" interviews on local television news shows. While such interviews can be highly entertaining, they are not necessarily an accurate indication of public opinion. First, they reflect the opinions of only those people who appear at a certain location. Thus, such samples can be biased in favor of commuters, middle-class shoppers, or factory workers, depending on which area the new people select. Second, television interviews tend to attract outgoing people who are willing to appear on the air, while they frighten away others who may feel intimidated by a camera. A survey must be based on a precise, representative sampling if it is to genu­inely reflect a broad range of the population.In preparing to conduct a survey, sociologists must exercise great care in the wording of questions. An effective survey question must be simple and clear enough for people to understand it. It must also be specific enough so that there are no problems in interpreting the re­sults. Even questions that are less structured must be carefully phrased in order to elicit the type of information desired. Surveys can be indispensable sources of information, but only if the sampling is done properly and the questions are worded accurately.There are two main forms of surveys: the interview and the ques­tionnaire. Each of these forms of survey research has its advantages. An interviewer can obtain a high response rate because people find it more difficult to turn down a personal request for an interview than to throw away a written questionnaire. In addition, an interviewer can go beyond written questions and probe for a subject's underlying feelings and reasons. However, questionnaires have the advantage of being cheaper and more consistentAccording to the passage, one advantage of live interviews over questionnaires is that live interviews _____.

Xem chi tiết 650 lượt xem 5 năm trước