关于吸烟危害的英文演讲教学教案.ppt

; Name:Yu Xiaobo Jiben Erban Topic:Cigarettes ? ; Tobacco is a solanaceae annual herb plants, and it has about more than sixty varieties. But the real used in the manufacture of cigarette and tobacco, is basicly only red tobacco. Besides, a few other varieties like chrysanthemum tobacco are used, other varieties are seldom used. ;At the middle of the 16th century, tobacco was introduced into China. It started by Sun Qiongyan, and it had more than 400 years of planting history. Since 1910,it was successfully planted in ShanDong, HeNan, AnHui, LiaoNing and other places . The introduction of Oriental tobacco in 1950s, the introduction of burley tobacco in 1960 s, respectively successfully planted in ZheJiang, HuBei. ;There are many varieties of cigarettes. ;More than 150 countries around the world of the statistical data shows that about 7% of the female adolescents are smoking, and in some countries and regions, the number of male and female adolescents who are smoking is almost equal. ; ;Nicotine in tobacco smoke of alkaloid content of more than 95% of tobacco smoke in other trace alkaloid, content is very small, each cigarette smokers to last for 5 mg. ;1. Smoking can damage the brain, affect intelligence . Because nicotine in cigarettes inside stimulus plant nerve system, causing vasospasm, affect the brain cortical neural activity, make the persons intelligence breakdown. 2. The nicotine tobacco is a kind of nerve toxin, main infringer of the nervous system. ;;Why are there still many people smoking ?;The effects of nicotine on the human body;1, it can directly kill life. 2,it can destroy human nutrition. 3, it can cause a variety of diseases .;1. Throw away smoking appliance, such as lighter, cigarette, reduce your conditioning. 2. After dinner, drink water, eat fruit or take a walk, get rid of the idea of a smoke after a meal. 3. Make a plan to give up smoking, to reduce the number of cigarettes every day. 4. If you really think