很多不抽烟得肺癌的，是否说明肺癌和吸烟没有因果关系？

来源: happycow222 于 2014-10-02 17:30:32 [旧帖] [给我悄悄话] 本文已被阅读：次

WENXUECITY.COM does not represent or guarantee the truthfulness, accuracy, or reliability of any of communications posted by other users.