公共英语四级听力-20及答案解析.doc

1、公共英语四级听力-20 及答案解析(总分：100.00，做题时间：90 分钟)一、Listening Comprehens(总题数：0，分数：0.00)二、Part A(总题数：1，分数：25.00)Information About the PassageDaily, moderate drinking could almost _ the riskof developing Alzheimers diseaseor other types of dementia, according to a new research.(1) The study, published this week

2、in The Lancet MedicalJournal, also finds that it doesnt seem to matter whatpeople drink-the effect is the _. (2) The adverse effect of excess alcohol is beyond _. (3) Dementia is often caused by a _ vessel problem. (4) Acetylcholine is a brain chemical believed to facilitatelearning and _. (5) （分数：2

3、5.00）(1).Information About the PassageDaily, moderate drinking could almost _ the riskof developing Alzheimers diseaseor other types of dementia, according to a new research.(1) The study, published this week in The Lancet MedicalJournal, also finds that it doesnt seem to matter whatpeople drink-the

4、 effect is the _. (2) The adverse effect of excess alcohol is beyond _. (3) Dementia is often caused by a _ vessel problem. (4) Acetylcholine is a brain chemical believed to facilitate (5) learning and _. （分数：5.00）填空项 1:_(2).Information About the PassageDaily, moderate drinking could almost _ the ri

5、skof developing Alzheimers diseaseor other types of dementia, according to a new research.(1) The study, published this week in The Lancet MedicalJournal, also finds that it doesnt seem to matter whatpeople drink-the effect is the _. (2) The adverse effect of excess alcohol is beyond _. (3) Dementia

6、 is often caused by a _ vessel problem. (4) Acetylcholine is a brain chemical believed to facilitatelearning and _. (5) （分数：5.00）填空项 1:_(3).Information About the PassageDaily, moderate drinking could almost _ the riskof developing Alzheimers diseaseor other types of dementia, according to a new rese

7、arch.(1) The study, published this week in The Lancet MedicalJournal, also finds that it doesnt seem to matter whatpeople drink-the effect is the _. (2) The adverse effect of excess alcohol is beyond _. (3) Dementia is often caused by a _ vessel problem. (4) Acetylcholine is a brain chemical believe

8、d to facilitatelearning and _. (5) （分数：5.00）填空项 1:_(4).Information About the PassageDaily, moderate drinking could almost _ the riskof developing Alzheimers diseaseor other types of dementia, according to a new research.(1) The study, published this week in The Lancet MedicalJournal, also finds that

9、 it doesnt seem to matter whatpeople drink-the effect is the _. (2) The adverse effect of excess alcohol is beyond _. (3) Dementia is often caused by a _ vessel problem. (4) Acetylcholine is a brain chemical believed to facilitatelearning and _. (5) （分数：5.00）填空项 1:_(5).Information About the PassageD

10、aily, moderate drinking could almost _ the riskof developing Alzheimers diseaseor other types of dementia, according to a new research.(1) The study, published this week in The Lancet MedicalJournal, also finds that it doesnt seem to matter whatpeople drink-the effect is the _. (2) The adverse effec

11、t of excess alcohol is beyond _. (3) Dementia is often caused by a _ vessel problem. (4) Acetylcholine is a brain chemical believed to facilitatelearning and _. (5) （分数：5.00）填空项 1:_三、Part B(总题数：1，分数：25.00)填空项 1:_填空项 1:_填空项 1:_填空项 1:_填空项 1:_四、Part C(总题数：3，分数：50.00)(1).The main purpose of this passage

12、 is to _.A. introduce the process of presidential inaugurationB. introduce the new presidentC. introduce how presidents are electedD. introduce the wife of Mr. Bush（分数：5.00）A.B.C.D.(2).What will be held in the evening?A. A cocktail party. B. A ball.C. A dinner. D. A concert.（分数：5.00）A.B.C.D.(3).Whic

13、h of the following statements is NOT true?A. Events related to the inauguration cost a lot to organize.B. Newly inaugurated presidents give a speech, officially called an inaugural address.C. Chief Justice William Rehnquist has pancreatic cancer.D. Pennsylvania Avenue is a wide street with the Capit

14、ol at one end and the White House at the other.（分数：5.00）A.B.C.D.(1).What is TRUE about Helen Keller?A. She was born in 1818.B. She lost her seeing ability at the age of 19 months.C. She could still hear.D. Her teacher was not very helpful in her learning.（分数：5.00）A.B.C.D.(2).Which of the following l

15、anguages didnt she learn?A. Latin. B. French. C. Spanish. D. German.（分数：5.00）A.B.C.D.(3).Which of the following statements is INCORRECT?A. Anne Sullivan helped her get ready for school and college.B. Helen Keller was 13 years old when she started at Radcliffe College in Massachusetts.C. Helen Keller

16、 worked for many years for the American Foundation for the Blind.D. Helen Keller died in nineteen sixty-eight.（分数：5.00）A.B.C.D.(1).The purpose of the passage is to _.A. introduce the importance of flagsB. introduce the history of Americas flagC. introduce the process of designing a flagD. introduce

17、the function of a national flag（分数：5.00）A.B.C.D.(2).On the American flag, what does red stand for?A. Honor. B. Justice. C. Innocence. D. Integrity.（分数：5.00）A.B.C.D.(3).How many stripes were there on American flag after 1817?A. 13. B. 15. C. 17. D. 20.（分数：5.00）A.B.C.D.(4).Which of the following state

18、ment is INCORRECT?A. The American colonists declared their independence on July fourth, seventeen seventy-six.B. Today there are 49 states, and hence 49 stars on the flag.C. A delegate to the Continental Congress, Francis Hopkinson, took credit for the flag design.D. And tradition says a committee l

19、ed by George Washington asked a woman with expert sewing skills, Betsy Ross, to make the first flag.（分数：5.00）A.B.C.D.公共英语四级听力-20 答案解析(总分：100.00，做题时间：90 分钟)一、Listening Comprehens(总题数：0，分数：0.00)二、Part A(总题数：1，分数：25.00)Information About the PassageDaily, moderate drinking could almost _ the riskof deve

20、loping Alzheimers diseaseor other types of dementia, according to a new research.(1) The study, published this week in The Lancet MedicalJournal, also finds that it doesnt seem to matter whatpeople drink-the effect is the _. (2) The adverse effect of excess alcohol is beyond _. (3) Dementia is often

21、 caused by a _ vessel problem. (4) Acetylcholine is a brain chemical believed to facilitatelearning and _. (5) （分数：25.00）(1).Information About the PassageDaily, moderate drinking could almost _ the riskof developing Alzheimers diseaseor other types of dementia, according to a new research.(1) The st

22、udy, published this week in The Lancet MedicalJournal, also finds that it doesnt seem to matter whatpeople drink-the effect is the _. (2) The adverse effect of excess alcohol is beyond _. (3) Dementia is often caused by a _ vessel problem. (4) Acetylcholine is a brain chemical believed to facilitate

23、 (5) learning and _. （分数：5.00）填空项 1:_ （正确答案：halve）解析：听力原文Daily, moderate drinking could almost halve the risk of developing Alzheimers disease or other types of dementia, according to a new research.The finding adds to a growing body of evidence for the health benefits of moderate drinking, which is

24、 already known to protect against heart disease and stroke.The study, published this week in The Lancet Medical Journal, also finds that it doesnt seem to matter what people drink-the effect is the same.Experts say moderation-between one and three drinks a day-is the key.The adverse effect of excess

25、 alcohol is beyond question.Researchers suggest the blood-thinning and cholesterol-lowering properties of ethanol in alcohol may ward off dementia, which is often caused by a blood vessel problem.Another possibility, the study speculates, is that low levels of alcohol can stimulate the release of ac

26、etylcholine, a brain chemical believed to facilitate learning and memory.(2).Information About the PassageDaily, moderate drinking could almost _ the riskof developing Alzheimers diseaseor other types of dementia, according to a new research.(1) The study, published this week in The Lancet MedicalJo

27、urnal, also finds that it doesnt seem to matter whatpeople drink-the effect is the _. (2) The adverse effect of excess alcohol is beyond _. (3) Dementia is often caused by a _ vessel problem. (4) Acetylcholine is a brain chemical believed to facilitatelearning and _. (5) （分数：5.00）填空项 1:_ （正确答案：same）

28、解析：(3).Information About the PassageDaily, moderate drinking could almost _ the riskof developing Alzheimers diseaseor other types of dementia, according to a new research.(1) The study, published this week in The Lancet MedicalJournal, also finds that it doesnt seem to matter whatpeople drink-the e

29、ffect is the _. (2) The adverse effect of excess alcohol is beyond _. (3) Dementia is often caused by a _ vessel problem. (4) Acetylcholine is a brain chemical believed to facilitatelearning and _. (5) （分数：5.00）填空项 1:_ （正确答案：question）解析：(4).Information About the PassageDaily, moderate drinking could

30、 almost _ the riskof de(1) veloping Alzheimers diseaseor other types of dementia, according to a new research.The st(2) udy, published this week in The Lancet MedicalJournal, also finds that it doesnt seem to matter whatpeople drink-the effect is the _. The adverse effect of excess alcohol is beyond

31、 _. (3) De (4mentia is often caused by a _ vessel problem.) Acetylcholine is a brain chemical believed to fa(5) cilitatelearning and _. （分数：5.00）填空项 1:_ （正确答案：blood）解析：(5).Information About the PassageDaily, moderate drinking could almost _ th(1) e riskof developing Alzheimers diseaseor other types

32、of dementia, according to a new research.The study, published this week in The Lancet MedicalJournal, also finds that it doesnt seem (2) to matter whatpeople drink-the effect is the _. The adverse effect of excess alcohol is beyo(3) nd _. Dementia is often caused by a _ vessel problem.(4) Acetylchol

33、ine is a brain chemical (5) believed to facilitatelearning and _. （分数：5.00）填空项 1:_ （正确答案：memory）解析：三、Part B(总题数：1，分数：25.00)填空项 1:_ （正确答案：one extra serving）解析：听力原文A new research is strengthening evidence that following moms admonition to eat your vegetables may be some of the best health advice aroun

34、d.A large study of 500,000 American retirees has found that just one extra serving of fruit or vegetables a day may reduce the risk of developing head and neck cancer.Numerous studies have demonstrated that diet plays a role in cancer. Cancer experts now believe that up to two-thirds of all cancers

35、come from lifestyle factors such as smoking, diet and lack of exercise.Researchers at the National Cancer Institute queried men and women aged 50 and older about their diets, then followed participants for five years to record all diagnoses of head and neck cancer, which is the sixth-leading cause o

36、f cancer-related death worldwide.Tobacco and alcohol use increases the risk of head and neck cancers, which affect the mouth, nose, sinuses and throat.The study found eating six servings of fruit and vegetables per day per 1,000 calories cut the risk of head and neck cancer by 29 percent compared to

37、 eating one and a half servings.The typical adult consumes around 2,000 calories a day.A second study of food consumption in more than 183,000 residents of California and Hawaii found that a diet high in flavonols might help reduce pancreatic cancer risk, especially in smokers.Flavonols are common i

38、n plant-based foods but are found in highest concentrations in onions, apples, berries, kale and broccoli.The study found that people who ate the largest amounts of flavonols had a 23 percent reduced risk of developing pancreatic cancer compared to those who ate the least.填空项 1:_ （正确答案：2/3）解析：填空项 1:

39、 （正确答案：Head and neck）解析：填空项 1:_ （正确答案：Tobacco and alcohol）解析：填空项 1:_ （正确答案：23%）解析：四、Part C(总题数：3，分数：50.00)(1).The main purpose of this passage is to _.A. introduce the process of presidential inaugurationB. introduce the new presidentC. introduce how presidents are electedD. introduce the wife of M

40、r. Bush（分数：5.00）A. B.C.D.解析：听力原文In the morning, President Bush and his wife Laura will attend a church service across from the White House. Then, they will go to the Capitol Hill for the swearing-in ceremony. Every four years, workers build a special stand outside for that purpose.The chief justice

41、of the United States traditionally swears in the vice president and then the president. However, Vice President Dick Cheney is to take the oath of office from Dennis Hastert, the speaker of the House of Representatives. Chief Justice William Rehnquist has thyroid cancer. But he is still planning to

42、swear in President Bush.Newly inaugurated presidents give a speech, officially called an inaugural address.After the ceremony, the president and vice president and guests go inside the Capitol to have lunch. Later, they watch a parade along Pennsylvania Avenue with floats and marching bands from aro

43、und the country. Pennsylvania Avenue is a wide street with the Capitol at one end and the White House at the other.Finally, in the evening, the leaders and groups of guests attend parties called inaugural balls. The first of these in Washington took place for President James Madison and his wife Dol

44、ly in eighteen o nine.Eight inaugural balls organized by states will take place around the city the following Thursday night. In addition, there will be a free celebration called the Commander-in-Chief Ball. This party is for troops recently back from Iraq and Afghanistan, or soon to be sent.Events

45、related to the inauguration will take place for several days before and after the swearing in. These activities cost a lot to organize. Some of the money is paid by taxpayers, and some by businesses, groups and individuals. By last Friday, the presidential inaugural committee had collected eighteen

46、million dollars, around half the goal.(2).What will be held in the evening?A. A cocktail party. B. A ball.C. A dinner. D. A concert.（分数：5.00）A.B. C.D.解析：(3).Which of the following statements is NOT true?A. Events related to the inauguration cost a lot to organize.B. Newly inaugurated presidents give

47、 a speech, officially called an inaugural address.C. Chief Justice William Rehnquist has pancreatic cancer.D. Pennsylvania Avenue is a wide street with the Capitol at one end and the White House at the other.（分数：5.00）A.B.C. D.解析：(1).What is TRUE about Helen Keller?A. She was born in 1818.B. She lost her seeing ability at the age of 19 months.C. She could still hear.D. Her teacher was not very helpful in her learning.（分数：5.00）A.B. C.D.解析：听力原文Helen Keller was born in eighteen eighty in a small town in