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致癌作用的效应在不同个体之间的表现有明显的个体差异。在同样致癌因素作用下，个体反应的性质与反应的强度却有所不同，这就是对致癌作用敏感性的个体差异。肿瘤流行病学调查资料的结果表明：在一般地区，人类在多种致癌物的作用下，年肿瘤发生率约为1％，表明在人群中得到肿
The effects of carcinogenesis have distinct individual differences in performance among individuals. Under the same carcinogenic factors, the nature of the individual’s response and the intensity of the response are different. This is the individual difference in sensitivity to carcinogenesis. The results of tumor epidemiological survey data show that in general areas, humans have an annual tumor incidence rate of approximately 1% under the influence of various carcinogens, indicating that they are swollen in the population.