排序方式: 共有4条查询结果,搜索用时 15 毫秒
1
1.
包钢尾矿坝每年要接纳来自包钢稀土三厂等四个企业排放的稀土工业废水数十万吨,这些废水中钍等放射性元素含量高,废水大量排人加重了尾矿坝的放射性污染.打拉亥、卜尔汗图两村居民区距离尾矿坝仅有2km,大面积农田紧靠尾矿坝,尾矿坝的渗水和扬尘中的放射性物质势必会污染两村的地下水和农田土壤,间接危害居民和牲畜的健康.为摸清污染现状,预测放射性污染的危害,我们进行了放射性污染现状调查. 相似文献
2.
包钢尾矿坝每年要接纳来自包钢稀土三厂等四个企业排放的稀土工业废水数十万吨,这些废水中钍等放射性元素含量高,废水大量排人加重了尾矿坝的放射性污染。打拉亥、卜尔汗图两村居民区距离尾矿坝仅有2km,大面积农田紧靠尾矿坝,尾矿坝的渗水和扬尘中的放射性物质势必会污染两村的地下水和农田土壤,间接危害居民和牲畜的健康。为摸清污染现状,预测放射性污染的危害,我们进行了放射性污染现状调查。 相似文献
3.
4.
Objective To investigate the stature and arm span of young and middle aged adults of rural Han nationality in Liaoning. Methods A methodology and a standard of anthropology were used to measure arm span and stature of 769 young and middle aged adults (males 386, females 383) of rural Han nationality in Liaoning province. The original data were analyzed by medical statistics and regression analysis. Results Based on the data of the stature and arm span obtained in this study, the mean, difference, typing of differences, exponent and regression equations were determined for young and middle aged adults of rural Han nationality in Liaoning. Conclusion The measurement and typing among the stature and arm span have uniformity with Chinese stature and the difference of height and sex. The stature has high correlation with the arm span. It is reliable to use the regression equations to estimate the stature or the arm span. 相似文献
1