论文部分内容阅读
本文系就美国职业癌的若干方面情况进行讨论,虽然专业化内容多些,但本着在普及的基础上提高的原则,本刊今后各期拟根据版面安排分期选刊,以下是选刊的第一部分。
This article is a discussion of several aspects of occupational cancer in the United States. Although there are more specialized contents, based on the principle of improving on the basis of popularization, we intend to arrange the periodicals in phases according to the layout in the future. The following is the first part .