Based on the data of cancer mortality registration in five cities and counties in Guangdong during 1980 through 1984, the mortality rate of lung cancer in urban is compared with that in rural area.
在广东省五个县市1980 ~ 84年肿瘤死亡登记资料的基础上，本文对各地肺癌死亡率进行对比分析。
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