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Doctors believe that second-hand smoke may cause lung cancer in people who
Doctors believe that second-hand smoke may cause lung cancer in people who
游客
2024-07-24
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问题
Doctors believe that second-hand smoke may cause lung cancer in people who do not smoke. Nonsmokers often breathe in the smoke from other people’s cigarettes. This is second-hand smoke. The U. S. Environmental Protection Agency (美国环保局) reports that about fifty-three thousand people die in the United States each year as a result of exposure (暴露) to second-hand smoke.
It is harder for children to avoid second-hand smoke. In the United States, nine million children under the age of five live in homes with at least one smoker. Research shows that these children are sick more often than children who live in homes where no one smokes. The damaging effects of second-hand smoke on children also continue as they grow up. The children of smokers are more than twice as likely to develop lung cancer when they are adults as children of nonsmokers. The risk is even higher for children who live in homes where both parents smoke.
People are becoming very aware of the danger of second-hand smoke. As a result, they have passed laws that prohibit people from smoking in many public places. Currently, 45 states in the United States have laws that restrict, or limit, smoking. The most well-known law doesn’t allow people to smoke on short native airline flights, i. e. flights within the country. [br] This passage is mainly about ______.
选项
A、how people get cancer
B、who can get cancer easily
C、what should be done with smoking in public
D、whether second-hand smoking can be harmful
答案
D
解析
主旨题。该题考查学生对全文的中心思想的判断。本文围绕吸二手烟对人们的危害这一主旨来展开,本题四个选项中,只有D 选项符合本文的主旨大意。A :人们如何患上癌症;B :哪些人更容易得癌症;C :在公共场所如何处理吸烟问题,均不符合文章中心思想。
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