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  3. Parents who smoke often open a window or turn on a fan to clear the air

Parents who smoke often open a window or turn on a fan to clear the air

游客2023-10-16  12
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 relative threat to【M1】__________
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 toxic mixture of gas【M2】__________
and particles（颗粒）clinging to smokers’ hair and clothing, not mention cushions【M3】__________
and carpeting, that linger long after second-hand smoke has cleared from a room.【M4】__________
The reminder includes heavy metals and radioactive materials that young children【M5】__________
can get on their hands and ingest, especially if they’ re crawling or playing
on the floor.Doctors from Mass General 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 latest【M6】__________
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 leaded author of the study and an assistant professor of pediatrics at【M7】__________
Harvard Medical School."When your kids are out of the house, they might smoke.【M8】__________
Or they smoke in the car.Or they strap the kid in the car seat in the back
and crack the window and smoke, and they think it’ s okay so the second-hand smoke【M9】__________
isn’ t getting to their kids, " Dr.Winickoff continued."We needed a term to describe
these tobacco toxins that aren’t invisible."【M10】__________ [br] 【M9】
选项
答案 so→because
解析 so的前半部分提到“许多父母认为只要把孩子放在后座上,打开车窗,这样抽烟就没有问题”，后面提到“小孩没吸到二手烟”,从句子之间的逻辑关系来判断,本句的因果关系颠倒了,是前果后因,故将so改成because。
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