关于吸烟危害的英文演讲课件.pptVIP

; 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. ;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. ; 740 million people are killed by secondhand smoke. 　The World Health Organization (WHO) statistics show that the number of death in the world has reached 600 million every year because of smoking , more than for HIV/AIDS, tuberculosis, malaria in the sum of the death toll.Among them, the smokers death bout 5.4 million, or an average of every 6 seconds one smokers die; Because of secondhand smoke exposure caused in non-smokers death toll is about 600000. ;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