4． Women would double their risk of suffering fromlung cancer if they were exposed to 40 or more years ofhousehold tobacco smoke.

A. 妇女在家里吸烟长达 410 年或更长时间，她们患肺癌的痛苦就会加倍。

B. 家庭妇女接触油烟，她们患肺癌的痛苦就会加倍。

C. 妇女在家里吸烟的时间，她们患肺癌的危险就会加倍。

D. 妇女在吸烟的家庭环境中生活 40 年或更长时间，她们患肺癌的风险就会加倍。

参考答案与解析：

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