[多项选择]尽管广告十分诱人，但所谓的“焦油和尼古丁含量低的香烟”同其他香烟一样不安全。根据联邦贸易委员会的报道，焦油和尼古丁的含量似乎比较低，其原因是联邦贸易委员会用吸烟机而不用人来决定焦油和尼古丁的含量。但人们不像吸烟机那样吸烟。
通过研究吸烟者的血样，并未发现各种品牌的吸烟者的血样有很大的差异，也没有发现吸入的尼古丁和所抽的任何品牌的香烟的数量有直接的联系。

参考答案:Despite seductive advertisements, so-called low tar and nicotine cigarettes are really no safer than other cigarettes. The seemingly lower levels of tar and nicotine reported by the Federal Trade Commission are attributable to the FTC use of smoking machines, not human beings, to determine tar and nicotine levels. But people do not smoke like machines. A study of blood samples of smokers found no significant differences among smokers of the various brands and a direct relationship between nicotine intake and the number of cigarettes smoked, regardless of brand.