2015年职称英语综合类阅读判断练习题(5)

更新时间：2015-12-10 11:50:58 来源：|0

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摘要 2015年职称英语考试报名已经开始，本站特为大家收集了综合类阅读判断练习题，以供大家复习之用。

考试动态：2015报名时间|报名官网|报考条件|免考条件 |教材变化解析及备考攻略

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　　2015年职称英语综合类阅读判断练习题(5)

　　Smoking

　　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 because they do not breathe in the smoke so deeply.

　　Apart from statistics,it might be helpful to look at what smoking tobacco does to the human body.Smoke is a mixture of gases,vaporized chemicals,minute particles of ash and other solids.There is also nicotine,which is powerful poison,and black tar.As smoke is breathed in，all those components form deposits on the membranes of the lungs.One point of concentration is where the air tube and bronchus divides.Most lung cancer begins at this point.

　　Filters and low tar tobacco2 are claimed to make smoking to some extent safer, but they can only slightly reduce, not eliminate the hazards.

　　词汇：

　　vaporize v.(使)蒸发

　　membrane n.膜

　　filter n.过滤嘴

　　nicotine n.尼古丁

　　bronchus n.支气管

　　注释：

　　1.life expectancy：预期寿命

　　2.low tar tobacco：焦油含量低的烟草

　　练习：

　　1. It is easy to determine whether smoking is hazardous.