首页
登录
职称英语
[originaltext] Since 1939, numerous scientific studies have been conducted t
[originaltext] Since 1939, numerous scientific studies have been conducted t
游客
2023-09-03
60
管理
问题
Since 1939, numerous scientific 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 cigarette 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 throat. Male cigarette smokers have a higher death rate from heart disease than nonsmoking makes. Female smokers are thought to be less affected because they do not breathe in the smoke so deeply.
It might be helpful to look at what smoking actually does to the human body. Smoke is a mixture of gases, vaporized chemicals, minute particles of ash, and other things. There is also nicotine, which is a powerful poison and black tar. As the smoke is breathed in, all these components form deposits on the membranes of the lungs. One point of concentration of deposits is where the air tube divides. Most lung cancer begins at this point.
Smoking also affects the heart and Blood vessels. It is known to be related to Beurger’ s disease, a narrowing of the small veins in the hands and feet that can cause great pain. Smokers also die much more often from heart disease.
选项
A、In 1939.
B、We don’t know.
C、Only these years.
D、This year.
答案
A
解析
转载请注明原文地址:http://tihaiku.com/zcyy/2983182.html
相关试题推荐
Theywere______intheirscientificresearch,notknowingwhathappenedjustou
Asmorefinancial_________havebeenconductedonline,peopleenjoyedtheimmen
Recentstudiesshowthatadvertisingusually______competitionandthereforelo
[originaltext]W:Areyoureallygoingtoquityourjob?M:Well...I’mnotsure.
[originaltext]W:Areyoureallygoingtoquityourjob?M:Well...I’mnotsure.
[originaltext]W:Areyoureallygoingtoquityourjob?M:Well...I’mnotsure.
[originaltext]W:Youcaneithergowithmeoryoucanstayhereattheapartmen
[originaltext]W:Youcaneithergowithmeoryoucanstayhereattheapartmen
[originaltext]W:Youcaneithergowithmeoryoucanstayhereattheapartmen
[originaltext]W:Youcaneithergowithmeoryoucanstayhereattheapartmen
随机试题
Whoarethesetwospeakers?[originaltext]W:Excuseme.Canyouhelpmeplease?
Thehumanbraincontains10thousandmillioncellsandeachofthesemayhav
WhichofthefollowingisCORRECT?[br][originaltext]Healthauthoritiesin
对城市可持续性发展的理解,不全面的是( )。A.对资源合理利用、少用不可再生资
A.Ⅲ度深覆 B.手腕部X线片 C.Ⅰ度拥挤 D.Ⅱ度开 E.Ⅱ度深覆盖
细菌哪种结构的功能类似真核细胞的线粒体A.胞质颗粒B.核蛋白体C.质粒D.异染颗
A.丙酮酸B.谷氨酸C.α-酮戊二酸D.甘氨酸E.草酰乙酸代谢时能直接生成一碳单
阅读下面材料,根据要求写作文。 东邻人家的岳母死了,殡葬的时候需要一篇祭文,这
A.5-羟色胺 B.去甲肾上腺素 C.乙酰胆碱 D.多巴胺 E.肾上腺素
亿凡公司与五悦公司签订了一份买卖合同,由亿凡公司向五悦公司供货;五悦公司经连续背
最新回复
(
0
)