{{B}}
Since 1939, numerous studies have been conducted to determine whether smoking is a health hazard. The trend of the evidence has been consistent and indicates that there is a serious health risk. Research teams have conducted studies that show beyond all reasonable doubt that tobacco smoking is associated with a shortened life expectancy. Cigarette smoking is believed by most research workers in this field to be an important factor in the development of cancer of the lungs and cancer of the throat and is believed to be related to cancer of some other organs of the body. Male cigarette smokers have a higher death rate from heart disease than non-smoking males. Female smokers are thought to be less affected bec 更多"阅读下面这篇短文,短文后列出了7个句子,请根据短文的内容对每个句子作出"的相关试题: [单项选择] 阅读下面这篇短文,短文后列出了7个句子,请根据短文的内容对每个句了作出判断。如果该句提供的是正确信息,请选择A项;如果该句提供的是错误信息,请选择B项;如果该句的信息文章中没有提及,请选择C项。
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