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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  29
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.
Compared with nonsmokers’ children, the children whose parents both smoke are likely to______.
选项 A、grow up more slowly
B、be sick under the age of five
C、develop lung cancer more often
D、become smokers more easily
答案C
解析 根据第三段最后两句“The children of smokers are more than twice as likely to develop lung cancer…The risk is even higher for children who live in homes where both parents smoke．”可知，与非吸烟者的孩子相比，吸烟者的孩子有两倍多的可能会患肺癌，而家里父母双方都吸烟的话，其孩子患肺癌的风险会更高。由此可推知，父母双方都是吸烟者的话，相比非吸烟者的孩子，其孩子更有可能患肺癌。故选C。
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