阅读材料据美国科学家研究,吸烟成瘾的过程大致是这样的:当你吸入第一口烟的10秒钟内,烟中的尼古丁便进入血液,随血流到达大脑,(1),钻进大脑神经表面的尼古丁受容器,开始刺激脑细胞,并迅速生成肾上腺素等有兴奋作用的化学物质,使血液循环加快。当第一支烟吸完后,血液循环给大脑 Reading Materials According to American scientists, the process of smoking addiction is roughly like this: When you inhale the first cigarette for 10 seconds, the nicotine in the cigarette enters the bloodstream, reaches the brain with the bloodstream, and (1) drills. Nicotine on the surface of the brain’s nerves is protected by containers, which start stimulating brain cells, and quickly produce chemicals such as epinephrine that are stimulant to accelerate blood circulation. When the first cigarette is smoked, blood circulates to the brain