Unit 1 Education
Unit 2 Health
Unit 3 History
Unit 4 Work
Unit 5 Disasters
Unit 6 Music
Unit 7 People
Unit 8 Life
Unit 9 Spots
Unit 10 Economy
Unit 11 Travel
Unit 12 Chinese Culture
Unit 13 Socia|lssues
Unit 14 Film and TV
Unit 15 Science and Technology
Unit 16 Nature
Tapescripts
Keys
摘要
Task Three If you're pregnant or have young children at home, your doctor might remind you not to smoke.Tobacco smoke is bad for you, whether you're the one who's smoking, or it's someone nearby.
Lately, scientists have found that tobacco is a threat even after the smoking has stopped. Third-handsmoke, they call it. It's the tobacco residue that clings to carpeting, furniture and clothing. For reasonswe'll hear in a moment, it presents a special threat to young children.
Third-hand smoke is the subject of a research paper in the January issue of the journal Pediatcs.The lead author is Jonathan Winickoff, assistant professor at Harvard Medical School and a practicingpediatrician.WINICKOFF:Third-hand smoke is the tobacco smoke contamination that remains after the cigarette is extinguished. What happens is, the smoker goes outside to smoke their cigarette. Then they come back inside. They're still contaminated with smoke. They offgas the smoke toxins from their clothes. ……
