国际交流英语视听说B4U6最新版本.ppt

Unit ;Listening 1 ;Announcer: Everyone, I just want to thank Dr. Wallace again for being the first guest speaker in our Healthline series. We hope that this is the first of many seminars about healthy living in today’s world. Dr. Wallace: It was my pleasure to be here. Announcer: So, now you’ve heard what Dr. Wallace has to say about pesticides and how they relate to our health and the environment. Let’s open the floor up for questions. We would appreciate hearing from you. I think we have our first question. Go ahead, sir. Male Speaker 1: OK. Here’s my question. Dr. Wallace, I heard that flame-retardants are now turning up in the human body. Is this true, and if so, how dangerous are those chemicals?;Dr. Wallace: All right. Well, flame-retardants—which are chemicals that make products difficult to burn—are added to just about any product that can burn, and they save hundreds of lives a year in the United States alone. Unfortunately, one family of flame-retardant compounds called PBDEs have been showing up in the blood of humans, but little is known about their impact on our health. In high amounts, they have caused health problems in laboratory animals. However, it looks as though the small amounts of PBDEs that normally accumulate in the human body aren’t worth worrying about. Announcer: Thank you, Doctor. We have another question. The woman in the third row. Go ahead. ;Female Speaker 1: Hi, Dr. Wallace. I’m a mother of two young children, and I recently moved into anew apartment. I just found out that the walls are painted with lead paint. What should I do? Dr. Wallace: Well, it’s known that even very small amounts of lead can cause brain damage in children. If the paint is chipping or flaking, call your landlord. It’s his or her responsibility to fix the problem. Another good option is to move, but if you can’t, at least make sure that your children aren’t exposed to paint chips or dust. Announcer: That sounds like good advice. Let’s take another question. OK,