如果，1美國的大氣質量明顯高於中國，2而吸煙人口又明顯低於中國，則為何肺癌同是首發，或前位高發癌？

來源: 大江川於 2013-10-18 11:46:20 [博客] [舊帖] [給我悄悄話] 本文已被閱讀：次

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