3. Learning Aims: 1.To improve our listening ability. 2.To get to know something about disease. Disease detective

4. the Center for Disease Control and Prevention 疾病控制和预防中心 a disease detective 疾病研究人员 clue 线索 find (give) a clue to sth. sign 体征；征兆；迹象

5. sore throat 咽喉疼 sore adj. 疼痛发炎的 get sick=fall ill sample 样品；样本；范例 every now and then every now and again every once in a while 时常；不时地；偶尔；间或 catch the disease 感染疾病

6. ordinary people 普通人 mask 面具；口罩

7. Part 1: 1.What are the people at the Center trying to do? 2. What kind of information does Jane collect? 3. What does Jane do with the information she collect? 4. How do the “disease detectives” do their job?

8. 1.What are the people at the Center trying to do? They are trying to control and prevent diseases.

9. 2. What kind of information does Jane collect?

10. Jane usually asks people if they _____ __ _______, _________ or ______ ________. She also asks When they ______ _____ have a fever headache sore throat got sick

11. 3. What does Jane do with the information she collect? She uses the information she collects to find out what caused the disease.

12. 4. How do the “disease detectives” do their job?

13. some woks in _____________ where they _________ __________ and ____________. Others travel to _______ or _________ where there are diseases and _____ ____ people ________ ______ ________ laboratories examine tests samples towns villages talk to who are sick

14. Part2: 1. How often does Jane go out to disease places? 2. How does she feel about her job? 3. What advice does she give to protect oneself?

15. 1.How often does Jane go out to disease places? 2. How does she feel about her job? about every three months sometimes afraid but always careful

16. 3. What advice does she give to protect oneself? 1).washing hands 2).not going to crowded places 3).wearing a mask if needed 4).see a doctor if you are sick

17. Listening text The Disease Detective Jane is one of the experts at the Center for Disease Control and Prevention. People at the Center study how diseases start and spread and, as the name shows, try to control and prevent diseases. We asked Jane about her work. (J=Jane; I=Interview) Part 1 J: Well, I have to be a detective: I go to a place where a disease has broken out and I look for clues about the disease, I try to find as much information as I can about what happened. Who is sick? What are the signs--do they have a fever, a headache or a sore throat? When did they get sick? When I have collected the information, I use it to find out what caused

18. Listening text the problem, We can use what we learn to prevent others from getting sick. Jane and other disease detectives at the Center do their jobs in different ways. Some detectives work in laboratories where they examine tests and samples. Others travel to towns or villages where there are diseases and talk to people who are sick. All of the experts at the Center know that their work is important. If they do their jobs well, they will save lives.

19. Listening text Part2 I: How often do you actually go to places where a new disease has broken out? J: Oh, it happens every now and then. Probably about every three months or so. I: How do you find out about new diseases? J: We will usually hear from doctors and hospitals. If they notice anything strange, they will give us a call and ask for help. If we think it is necessary, we will go to the place where people are getting sick. I: Aren’t you afraid of catching the diseases you are studying?

20. Listening text J: Well, yes, sometimes. But we are always very careful. If you know what you are doing, you can protect yourself. Besides, I’m more afraid of what might happen if we don’t find out what kind of disease it is. I: What can ordinary people do to protect themselves? J: The best thing you can do is simply to wash your hands often and try to avoid crowded places. Wearing a mask over your face may help, but it is probably not necessary unless you are caring for a sick person. It is also important to see a doctor if you get sick, so that you don’t spread a disease without knowing it.

21. Ken is learning about HIV / AIDS in school. His teacher has asked him to interview a doctor at the local hospital and write a report about basic HIV / AIDS facts. Listen to the interview and help Ken prepare the report.

22. What do the letters AIDS stand for?

23. What does “acquired” mean? Acquired means that you get something from someone. In “AIDS”, it means that AIDS is a disease that we get from other people.

24. What is the function of one’s immune system? The immune system protects the body from diseases.

25. 3. What does AIDS do to our immune system? AIDS breaks down the immune system.

26. How do people become infected with HIV/AIDS? People can become infected with HIV/AIDS through blood transfusion, unprotected sex and childbirth.

27. What can we do to protect ourselves from HIV/AIDS? We should learn more about the disease and avoid unsafe practices.

28. What can we do to learn more about HIV/AIDS? We can ask doctor and nurses to tell us about the disease and we can read about the disease in books and on the Internet.

29. Part 2 Listen to the tape and fill in the blanks below. 1 When a person infected with HIV ________ AIDS, he or she easily gets _______. 2 A person with AIDS has a very ______ __________ ___________. 3 Many AIDS patients die of _________ or serious _______, but there are also many diseases that we have never ________ of. 4 Therefore, much of the __________ an AIDS patient receives is meant to help the body _________ ______ against diseases. develops sick weak immunesystem infections colds heard treatment defenditself

30. Listening Text K=Ken; W=Dr Watts Part 1 K: Hello, Dr Watts. Thank you for letting me interview you. W: You’ve welcome. Now, what would you like to know? K: Well, my first question if about the name of the disease. What does AIDS stand for? W: When we talk about AIDS, we often use the term HIV/ AIDS. HIV is the virus that causes AIDS. AIDS stands for “Acquired Immune Deficiency Syndrome”. K: Acquired Immune Deficiency Syndrome. Ok, got it. But I’m not sure I understand what it means. W: Well, to “acquire” something is to get something, so “acquired” means that you can get infected with the disease. “Immune” comes from “immune system”, the system that protects our body from diseases.

31. Listening Text K=Ken; W=Dr Watts K: So “ acquired immune” tells us that this is a disease that we can get from other people and that has something to do with our immune system. What exactly does AIDS do to our immune system? W: That’s what the next word tells us. If something is “deficient”, it means that it isn’t functioning probably, it isn’t working the way it should. So “acquired immune deficiency” means that even though we were born with a good immune system. We have now got a disease that breaks down the immune system. K: Wow, that’s terrible! So what happens when someone’s immune system doesn’t work? W: Well, to put it simply, he or she gets sick a lot. The last word in AIDS, “syndrome”, means all the bad things that happen to your body when the immune system doesn’t work.

32. Part 2 People who die of AIDS actually don’t die of AIDS. When a person infected with HIV develops AIDS, he or she easily gets sick. A person with AIDS has a very weak immune system. Many common disease can be cured in patients whose immune system functions well, but when they enter the body of a person with AIDS, they can kill him or her. Many AIDS patients die of infections or serious colds, but there are also many diseases that we have never heard of. If your immune system is working, they may not be able to do any harm, but because the immune system has been weakened, the diseases can’t be cured. They will grow stronger and stronger until one day they kill the patient with AIDS. Therefore, much of the treatment an AIDS patient receives is meant to help the body defend itself again diseases.