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摘要： <正>Epidemiologic studies have shown that the aging of the population is a major factor for the increased incidence of cancer.With the Epidemiologic the remarkable industrialization and urbanization in China in the past 30 years,air pollution has become a ubiquitous problem in China,especially in northern and eastern China.During the winter months of late 2013 and early 2014,northern China has been frequently fi lled with fog-like haze 2014,northern China has been frequently lled with fog-like haze ... （共1頁）