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  3. Doctors believe that second-hand smoke may cause lung cancer in people who do not smoke. Nonsmokers often breathe in the smok

Doctors believe that second-hand smoke may cause lung cancer in people who do not smoke. Nonsmokers often breathe in the smok

admin2020-01-11  33
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 US 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 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 US have laws that restrict smoking. The most well-known law doesn’ t allow people to smoke on short native airline flights, i. e. flights within the country.
Why are there laws made against smoking in public places in the US?
选项 A、Because people are conscious of the danger of second-hand smoke.
B、Because more and more people don’ t like smoke now.
C、Because parents don’t want their children to become smokers.
D、Because the government wants to limit the production of cigarettes.
答案A
解析 根据最后一段前三句“People are becoming very aware of the danger of second-hand smoke．As a result，they have passed laws that prohibit…in the US have laws that restrict smoking．”可知，由于人们越来越意识到二手烟的危害，因此他们制定了禁止在公共场合吸烟的法律，目前在美国就有45个州出台了限制吸烟的法律。故选A。
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