级听力练习iv录音文字.docx

1、级听力练习iv录音文字Section ADirections: In this section, you will hear two long the end of each conversation, you will hear some questions. Both the conversation and the questions will be spoken only you hear a question, you must choose the best answer from the four choices marked A), B), C) and D).Then mar

2、k the corresponding letter on Answer Sheet 1with a single line through the centre.Conversation OneW: Todays guest on Science Update is David Brown. Dr. Brown, you and your team have found bacteria far below the Earths surface. You must be thrilled about your discovery.M: Well, yes, its very exciting

3、. For a long time wed suspected the presence of such organisms, but we lacked substantial evidence.W: How did you confirm the existence of the bacteria?M: Well, technology helped. Our drilling techniques have improved significantly, and so the risk that surface bacteria could be mistaken for those f

4、ound at much greater depth was reduced. With the new techniques, we could get much deeper into the Earth.W: How far down did you actually get?M: In one case, about three kilometers. We were surprised, I must tell you, that there were organisms that far down.W: You know, it sounds like fiction, somet

5、hing like a lost world.M: Lets call it a hidden biosphere, and its probably a very extensive one.The mass of the living organisms below the surface may be equal in size to the mass of the surface bacteria.W: Have you found any unique life-forms?M: Yes. Weve found a very special organism. Lets call i

6、t Type-A bacterium. It can live and grow only where there is no oxygen.W: Is there any danger of these bacteria infecting people when you bring them to the surface?M: These bacteria were adapted to an environment thats completely different from humans. Thats to say, they could not survive in our env

7、ironment. So we really dont need to worry about these bacteria causing illness in people.Questions 1 to 4 are based on the conversation you have just heard.1. What have Dr. Brown and his team discovered?2. What helps to confirm the existence of bacteria below the Earths surface?3. How deep down did

8、the man find the bacteria?4. Why does the man say there is no danger of infection by the bacteria brought to surface?Conversation TwoW: I havent seen you here for a couple weeks. Have you stopped eating or something?M: No. Does it look like Ive stopped eating? Ive been spending a lot of time in the

9、library.W: Working on a paper?M: I wish I was working on a paper! Im working on three different papers:anthropology, English literature, and history.W: Wow, that is a lot of work.M: Yeah, and whats frustrating is that Im studying the nineteenth century British Empire in all three classes, but I cant

10、 just write a single paper for all three.W: Why not?M: The professors wont let me even if I make it three times as long as the suggested length.W: Thats too bad. Could you write your papers on three aspects of one topic?M: Hmm. What do you mean? Do you have something in mind?W: Well, lets see. Hmm.M

11、aybe you could do something with Romanticism, like, oh. write your anthropology paper on the cultural basis of Romanticism, and, uh, your history paper on the influence of the Romantic poets on British foreign policy, and, OK, and your English paper on an analysis of some Romantic poems.M: Hey, that

12、s not a bad idea! Ive already started the research for one of the papers, so I can use that. What can I do to repay you?W: You want to write up my chemistry paper for me?M: Id love to, but Ive never taken chemistry, so Im not sure youd like the results.W: Oh well, no thanks necessary then. Ill do it

13、 myself. Have a good weekend, and try to get out of the library and get some sleep. You have big circles under your eyes.M: OK, Ill try. See you later.Questions 5 to 8 are based on the conversation you have just heard.5. What has the man been busy doing recently?6. What does the woman suggest the ma

14、n do to make his work easier?7. Why does the woman mention Romanticism?8. Why doesnt the man want to help the woman?Section BDirections: In this section, you will hear two the end of each passage, you will hear some the passage and the questions will be spoken only you hear a question, you must choo

15、se the best answerfrom the four choices marked A), B), C) and D).Then mark the corresponding letter on Answer Sheet 1with a single line through the centre.Passage OneI hope you have all finished reading the assigned chapter on insurance-so that youre prepared for our discussion today. But, before we

16、 start, Id like to mention a few things your text doesnt go into.Its interesting to note that insurance has existed in some form for a very long time. The earliest insurance policies provided shipping protection for merchants as far back as 3000 B. C.In general, the contracts were often no more than

17、 verbal agreements. They granted loans to merchants with the understanding that if a particular shipment of goods was lost at sea, the loan didnt have to be repaid. Interest on the loans varied according to how risky it was to transport the goods. During periods of heavy piracy at sea, for example,

18、the amount of interest and the cost of the policy went up considerably. So, you can see how insurance helped encourage international trade. Even the most cautious merchants became willing to risk shipping their goods over long distances-not to mention in hazardous weather conditions-when they had th

19、is kind of protection available.Generally speaking, the basic form of an insurance policy has been pretty much the same since the Middle Ages. There are four points that were prominent then and remain dominant in all policies today. These were outlined in chapter six and will serve as the basis for

20、the rest of todays discussion.Questions 9 to 11 are based on the passage you have just heard.9. Who were the first insurance contracts designed to protect?10. What determined the interest on the loans?11. What does the speaker say about current insurance policies?Passage TwoMilk was a basic food of

21、man long before history was written. It will probably keep on being one as long as there are animals that give milk.Many ancient people thought that milk had great healing power. One of the most famous Greek doctors told his patients to drink milk to cure illness.For more than two hundred years most

22、 people got their milk from their own cattle or from a nearby dairy herd. But in time new inventions made the dairy industry a big business. In 1851 Gail Borden, founder of a milk company, found a way to take some of the water out of milk. This made it keep much longer. Four years later, Louis Paste

23、ur introduced the pasteurization process. This process killed the bacteria in milk that caused it to spoil. Next, a special milk bottle was designed. This was followed by the invention of machines that could fill bottles and cap them automatically. These discoveries had a great effect on the dairy i

24、ndustry. They meant that milk could be stored longer. It could be safely shipped over long distances. Preparing and distributing milk soon became a large-scale business. Recently, in a single year more than sixty billion quarts of milk were sold in the United States.Some people believe that milk dri

25、nking will become less popular in America than it has been. But remember how long milk has been a basic food and think of the many ways in which it is useful. It seems safe to say that the milk industry will always be important.Questions 12 to 15 are based on the passage you have just heard.12. What

26、 did ancient people think about milk?13. Why did milk become a big business?14. What invention made milk keep longer in 1851?15. What does the speaker think of the milk industry in the future?Section CDirections: In this section,you will hear recordings of lectures or talksfollowed by some recording

27、s will be played only you hear a question,you must choose the best answerfrom the four choices marked A), B), C) and D).Then mark the corresponding letter on Answer Sheet 1with a single line through the centre.Now listen to the following recording and answer questions 16 to 19.Fifty years ago, when

28、I began exploring the ocean, no one imagined that we could do anything to harm the ocean by what we put into it or by what we took out of it. It seemed, at that time, to be a sea of paradise, but now we know that we are facing paradise lost.I want to share with you my personal view of changes in the

29、 sea that affect all of us, and to consider why it matters that in 50 years, weve lost-actually, weve taken, weve eaten-more than 90 percent of the big fish in the sea; why you should care that nearly half of the coral reefs have disappeared; why a reduction of oxygen in large areas of the Pacific s

30、hould concern not only the creatures that are dying, but it really should concern you. It does concern you, as well.There was still time. Well, now is that time. I hope for your help to explore and protect the wild ocean in ways that will restore the health and, in so doing, secure hope for humankin

31、d. Health to the ocean means health for us.For me, as a scientist, it all began in 1953when I first tried underwater breathing device. Its when I first got to know how fish swimming in mysterious ocean. I actually love diving at night; you see a lot of fish then that you dont see in the daytime. Sin

32、ce then, Ive started designing and building 13 underwater systems to access the deep sea. I led a five-year National Geographic expedition, the Sustainable Seas expeditions, using these little submarines. Theyre so simple to drive that even a scientist can do it. And Im living proof.Over time, most of the planets organic carbon has been absorbed and stored there. The ocean drives climate and weather, stabilizes temperature, shapes Earths chemistry. Water from the sea provides home for about 97