[外语类试卷]国家公共英语四级（听力）练习试卷8及答案与解析.doc

1、国家公共英语四级（听力）练习试卷 8及答案与解析 PART A Directions: For Questions 1-5, you will hear a conversation. While you listen, fill out the table with the information you have heard. Some of the information has been given to you in the table. Write only 1 word in each numbered box. You will hear the recording twice

2、. You now have 25 seconds to read the table below. 1 PART B Directions: For Questions 6-10, you will hear a passage. Use not more than 3 words for each answer. You will hear the recording twice. You now have 25 seconds to read the sentences and the questions below. 6 Health experts have discovered t

3、hat adding low-calorie vegetable broth to the start of a meal can actually help to _ . 7 This is because you tend to feel full sooner, you eat less of your _ . 8 Participants in the study who ate a course of soup before lunch reduced their total calorie intake by _, compared with those who didnt. 9

4、Researchers stressed the soup must be low-calorie and based on stock, not _ . 10 Thick soups and thin soups have _ effect. PART C Directions: You will hear three dialogues or monologues. Before listening to each one, you will have 5 seconds to read each of the questions which accompany it. While lis

5、tening, answer each question by choosing A, B, C or D. After listening, you will have 10 seconds to check your answer to each question. You will hear each piece ONLY ONCE. 11 How much is the damage done to the United States each year by red ants? （ A） 3 billion dollars. （ B） 4 billion dollars. （ C）

6、5 billion dollars. （ D） 6 billion dollars. 12 Which of the following is NOT the damage done by red ants? （ A） They can destroy the houses of farmers. （ B） They can injure animals and farmers. （ C） They destroy crops. （ D） They get into animal feed. 13 What could be an effective way to control the re

7、d ants? （ A） To spread a kind of virus within the ants themselves. （ B） To use fire to destroy them. （ C） To create a kind of powerful poison to destroy them. （ D） To raise other biological animals to kill them. 14 How many people become infected with malaria each year? （ A） Over 3 million. （ B） Ove

8、r 7 million. （ C） Over 30 million. （ D） Over 70 million. 15 What is not one of the bad effects of malaria? （ A） The malaria parasites will grow and divide in the kidney. （ B） The red blood cells will then be invaded by the parasites which reproduce thousands of times later. （ C） The parasites cause

9、a person s body temperature to rise. （ D） People with malaria may suffer kidney failure or loss of red blood cells. 16 What is the main idea of the passage? （ A） Malaria is uncontrollable. （ B） Scientists are trying to develop insects resistant to malaria. （ C） How to kill mosquitoes. （ D） How usele

10、ss science is in curing malaria. 17 The study was carried out by scientists from _ . （ A） America and Australia （ B） America and Canada （ C） America and Austria （ D） America and China 18 The scientists say one effect of shark fishing has been an estimated _ decrease in some shark populations. （ A） 9

11、% （ B） 19% （ C） 90% （ D） 99% 19 Why is the demand for shark fins rising in Asia? （ A） Because there are fewer sharks in Asia. （ B） Because shark fins can be used for medical purposes and for food. （ C） Because shark fins are poisonous. （ D） Because shark fins are expensive. 20 For one of the studies

12、, scientists from Canada noted a sharp decrease in _ kinds of great sharks since the nineteen eighties. （ A） 8 （ B） 9 （ C） 10 （ D） 11 国家公共英语四级（听力）练习试卷 8答案与解析 PART A Directions: For Questions 1-5, you will hear a conversation. While you listen, fill out the table with the information you have heard.

13、Some of the information has been given to you in the table. Write only 1 word in each numbered box. You will hear the recording twice. You now have 25 seconds to read the table below. 1 【 听力原文】 Financial aid programs in the United States, especially at the undergraduate level, do often re-quire Amer

14、ican citizenship. At the same time, scholarships often pay only part of the cost of an education. The National Federation of the Blind advises students to contact any school they wish to at-tend to ask about financial aid. The federation is the country s largest group for the blind. Each year it awa

15、rds scholarships that do not have any citizenship requirements. Students must be legally blind. And foreign students cannot apply until a college in the United States has already accepted them. The application deadline is March thirty-first for thirty scholarships offered for this fall. Most are thr

16、ee thousand dollars. The highest is twelve thousand dollars. The United States has an estimated one million blind adults. The federation says there are no special colleges or universities for the blind. But schools do offer special services and technology to help students with disabilities. 1 【正 确答案

17、】 American 【知识模块】 听力 2 【正确答案】 legally 【知识模块】 听力 3 【正确答案】 3,000 【知识模块】 听力 4 【正确答案】 12,000 【知识模块】 听力 5 【正确答案】 1,000,000 【知识模块】 听力 PART B Directions: For Questions 6-10, you will hear a passage. Use not more than 3 words for each answer. You will hear the recording twice. You now have 25 seconds to rea

18、d the sentences and the questions below. 6 【听力原文】 A bowl of soup a day could keep the pounds at bay. Health experts have discovered that adding low-calorie vegetable broth to the start of a meal can actually help to lose weight. This is be-cause you tend to feel full sooner, you eat less of your mai

19、n course. The soup regime was tested by researchers at Pennsylvania State University, led by Dr. Barbara Rolls. They found that when participants in the study ate a first course of soup before lunch they reduced their total calorie intake by 20 percent, compared with those who did not begin the meal

20、 with soup. But those who favour creamy soups should beware. Researchers stressed the soup must be low-calorie and based on stock, not cream. All of the soups tested in the study were made from identical ingredients-chicken stock, broccoli, potato, cauliflower and carrots. They were blended to creat

21、e four different textures and degrees of thickness from separate stock and vegetables through to pur6ed soup. Scientists thought that thick soups with chunks of vegetables which required chewing might be more filling, but to their surprise they found all forms had the same effect. The findings were

22、presented to the Experimental Biology conference in Washington D. C., and the research was part funded by the National Institute of Health. 6 【正确答案】 lose weight 【知识模块】 听力 7 【正确答案】 main course 【知识模块】 听力 8 【正确答案】 20% 【知识模块】 听力 9 【正确答案】 cream 【知识模块】 听力 10 【正确答案】 the same 【知识模块】 听力 PART C Directions: Yo

23、u will hear three dialogues or monologues. Before listening to each one, you will have 5 seconds to read each of the questions which accompany it. While listening, answer each question by choosing A, B, C or D. After listening, you will have 10 seconds to check your answer to each question. You will

24、 hear each piece ONLY ONCE. 11 【听力原文】 Farmers in parts of the United States have struggled for years with an invasion of red imported fire ants from Brazil. These insects do major damage, unlike native kinds of fire ants. Each year they cause an estimated six billion dollars worth of damage in the U

25、nited States. More than one billion dollars of that is just in Texas. The ants are thought to have arrived in the southern state of Alabama in the nineteen twenties or thirties. Since then they have spread northward and all the way to the West Coast. They ruin crops, damage soil and get into animal

26、feed. They also damage electrical equipment and machinery. Not only that, they injure animals and workers. So farmers have to deal with medical costs and lost labor. Fire ants get their name because when they sting, they inject poison into the skin that causes a feeling of intense burning. Some peop

27、le suffer life-threatening reactions. Colonies of red imported fire ants can be found in cities as well as farming areas. They can go deep underground to survive periods of little or no rain. They have no native predators, no creatures that like to feed on them. But one solution could come from the

28、ants themselves, in the form of a virus that some of them carry. This virus may someday help control the population. Scientists at the United States Department of Agriculture began to work with the virus about five years ago. The researchers observed one hundred sixty-eight nests of imported fire an

29、ts in Florida. They found the virus in almost one-fourth of them. The researchers found that the virus affected every part of fire-ant development, including the eggs. The affected colonies died in about three months. Now, government researchers want to work with a private company to produce large a

30、mounts of the virus. It could then be used as a biological control. 11 【正确答案】 D 【知识模块】 听力 12 【正确答案】 A 【知识模块】 听力 13 【正确答案】 A 【知识模块】 听力 14 【听力原文】 Researchers in the United States are exploring a possible way to control malaria. They are developing insects resistant to the disease. More than three mill

31、ion people become infected with malaria each year. The disease kills at least one million people every year. Malaria is found in Africa, Asia, the Middle East and South America. Malaria parasites enter a person s blood through the bite of a very small insect-the mosquito. The malaria parasites trave

32、l to the liver. The organisms grow and divide there. After a week or two, the parasites invade red blood cells and reproduce thousands of times. They cause a person s body temperature to rise. They also may destroy major organs. People with malaria may suffer kidney failure or loss of red blood cell

33、s. People die from malaria because they are not treated or treatment is delayed. Different drugs can prevent the parasites from developing in the body. But experts still say the best way to prevent the disease is not to be bitten by a mosquito. That could change in the future. Research scientists at

34、 The Johns Hopkins University have created mosquitoes that cannot spread the malaria parasites. Computer studies show that such insects are needed to replace mosquitoes in the wild if malaria control is to succeed. The researchers reported their findings in the Proceedings of the National Academy of

35、 Sciences. 14 【正确答案】 A 【知识模块】 听力 15 【正确答案】 A 【知识模块】 听力 16 【正确答案】 B 【知识模块】 听力 17 【听力原文】 Canadian and American scientists studied the effects of people s fishing for sharks in the Northwest Atlantic over the past thirty-five years. Results of their studies were published in Science magazine. The scien

36、tists say one effect of shark fishing has been an estimated ninety-nine percent de-crease in some shark populations. They say the loss of larger sharks has caused a population explosion among fish like skates and rays. Such fish and smaller sharks have increased in number along the east coast of the

37、 United States. Sharks usually eat skates and rays. The scientists say these fish feed on shellfish, which are disappearing from the ocean. They say other sea animals are also being threatened by the area s changing environment. Demand for shark fins has been rising in Asia. Shark fins are used for

38、medical purposes and also for food. For one of the studies, scientists from Canada examined information from private fishing companies and other research projects. They noted a sharp decrease in eleven kinds of great sharks since the nineteen eighties. One of the scientists was Julia Baum of Dalhous

39、ie University. She says the World Conservation Union earlier this year listed great hammerhead and scalloped hammerhead sharks as being in danger of disappearing. The group also reported the dusky and sandbar sharks as being threatened. 17 【正确答案】 B 【知识模块】 听力 18 【正确答案】 D 【知识模块】 听力 19 【正确答案】 B 【知识模块】 听力 20 【正确答案】 D 【知识模块】 听力