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  3. Parents who smoke often open a window or turn on a fan to clear the air for their children, but experts now have identified a re

Parents who smoke often open a window or turn on a fan to clear the air for their children, but experts now have identified a re

admin2012-01-27  29
问题     Parents who smoke often open a window or turn on a fan to clear the air for their children, but experts now have identified a related threat to children’s health that isn’t as easy to get rid of: third-hand smoke. That’s the term being used to describe the invisible yet poisonous gases and particles clinging (粘着) to smokers’ hair and clothing, not to mention cushions and carpeting, that stays long after second-hand smoke has cleared from a room. The remains include heavy metals and radioactive materials that young children can get on their hands and take into their body, especially if they’re crawling or playing on the floor.
    Doctors from MassGeneral Hospital for Children in Boston coined the term "third-hand smoke" to describe these chemicals in a new study that focused on the risks they pose to infants and children. The study was published in the latest issue of the journal Pediatrics. "Everyone knows that second-hand smoke is bad, but they don’t know about this," said Dr. Jonathan P. Winickoff, the lead author of the study and an assistant professor of pediatrics (儿科) at Harvard Medical School. "When their kids are out of the house, they might smoke. Or in the car, they put the kid in the car seat in the back and crack the window and smoke, and they think it’s OK because the second-hand smoke isn’t getting to their kids. We needed a term to describe these tobacco toxins that aren’t visible."
    The study reported on attitudes toward smoking in 1,500 households across the United States. It found that the vast majority of both smokers and nonsmokers were aware that second-hand smoke is harmful to children. Some 95 percent of nonsmokers and 84 percent of smokers agreed with the statement that "inhaling smoke from a parent’s cigarette can harm the health of infants and children". But far fewer of those surveyed were aware of the risks of third-hand smoke. Since the term is so new, the researchers asked people if they agreed with the statement that "breathing air in a room today where people smoked yesterday can harm the health of infants and children". Only 65 percent of nonsmokers and 43 percent of smokers agreed with that statement, which researchers interpreted as acknowledgement of the risks of third-hand smoke.
It can be inferred from the last paragraph that_____.
选项 A、parents who have babies should be banned from smoking
B、less smokers regard smoking harmful than nonsmokers do
C、researchers fail to prove the harm of third-hand smoke now
D、second-hand smoke does more harm than third-hand smoke
答案B
解析 根据题干中的last paragraph将本题出处定位到末段。该段提到，大约95％的非烟民和84％的烟民同意“婴幼儿吸入父母的二手烟可能致病”的论断。当问及人们是否同意“昨天有人抽过烟的屋子里的空气会对婴幼儿产生危害”的论断时，只有65％的非烟民和43％的烟民认同该说法。由两组数据的对比可知，认为吸烟有危害的烟民比非烟民要少，故答案为[B]。虽然吸烟有很大的危害，但文中并未提及应该禁止有小孩的父母吸烟，故排除[A]。[C]是针对末段末句中which researchers interpreted as acknowledgement of therisks of third—hand smoke所设的干扰项。文中没有提及二手烟和三手烟所造成的危害的对比，故排除[D]。
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大学英语四级

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