全文获取类型
收费全文 | 956篇 |
免费 | 18篇 |
国内免费 | 17篇 |
专业分类
安全科学 | 103篇 |
废物处理 | 29篇 |
环保管理 | 213篇 |
综合类 | 191篇 |
基础理论 | 226篇 |
污染及防治 | 150篇 |
评价与监测 | 46篇 |
社会与环境 | 27篇 |
灾害及防治 | 6篇 |
出版年
2023年 | 12篇 |
2022年 | 4篇 |
2021年 | 17篇 |
2020年 | 23篇 |
2019年 | 13篇 |
2018年 | 25篇 |
2017年 | 19篇 |
2016年 | 39篇 |
2015年 | 25篇 |
2014年 | 34篇 |
2013年 | 74篇 |
2012年 | 37篇 |
2011年 | 60篇 |
2010年 | 36篇 |
2009年 | 47篇 |
2008年 | 51篇 |
2007年 | 40篇 |
2006年 | 47篇 |
2005年 | 38篇 |
2004年 | 27篇 |
2003年 | 34篇 |
2002年 | 33篇 |
2001年 | 21篇 |
2000年 | 24篇 |
1999年 | 9篇 |
1998年 | 7篇 |
1997年 | 7篇 |
1996年 | 15篇 |
1995年 | 14篇 |
1994年 | 15篇 |
1993年 | 13篇 |
1992年 | 11篇 |
1991年 | 11篇 |
1990年 | 8篇 |
1989年 | 6篇 |
1988年 | 11篇 |
1987年 | 12篇 |
1986年 | 5篇 |
1985年 | 10篇 |
1984年 | 6篇 |
1983年 | 10篇 |
1982年 | 8篇 |
1981年 | 14篇 |
1980年 | 6篇 |
1979年 | 3篇 |
1978年 | 2篇 |
1977年 | 2篇 |
1972年 | 1篇 |
1962年 | 1篇 |
1956年 | 1篇 |
排序方式: 共有991条查询结果,搜索用时 31 毫秒
91.
92.
93.
A wide spectrum of genetic causes may lead to nonimmune hydrops fetalis (NIHF), and a thorough phenotypic and genetic evaluation are essential to determine the underlying etiology, optimally manage these pregnancies, and inform discussions about anticipated prognosis. In this review, we outline the known genetic etiologies of NIHF by fetal organ system affected, and provide a systematic approach to the evaluation of NIHF. Some of the underlying genetic disorders are associated with characteristic phenotypic features that may be seen on prenatal ultrasound, such as hepatomegaly with lysosomal storage disorders, hyperechoic kidneys with congenital nephrosis, or pulmonary valve stenosis with RASopathies. However, this is not always the case, and the approach to evaluation must include prenatal ultrasound findings as well as genetic testing and many other factors. Genetic testing that has been utilized for NIHF ranges from standard chromosomal microarray or karyotype to gene panels and broad approaches such as whole exome sequencing. Family and obstetric history, as well as pathology examination, can yield additional clues that are helpful in establishing a diagnosis. A systematic approach to evaluation can guide a more targeted approach to genetic evaluation, diagnosis, and management of NIHF. 相似文献
94.
95.
The theory of neighbourhood decline due to pariah land uses: Regaining control of the downward cycle
Some neighbourhood environments have become dumping grounds for locally unwanted land uses (LULUs) that middle-class Americans do not want near their homes. LULUs may combine with other pariah land uses to collectively undermine the quality of the local environment, reduce investment, government services, the proportion of middle-income people and associated businesses. As important neighbourhood attributes are lost, illegal activities, derelict structures, trash-strewn lots and the concentration of poor and unhealthy people may increase. This paper describes the theory behind the impact of pariah land uses through examples of the downward spiral experienced by Camden, New Jersey and the south Bronx, New York. It then documents the experience of one community, Elizabethport, New Jersey, in reversing that downward spiral. Success in Elizabethport came from the synergistic activities of local, state and federal governments, community groups, and not-for-profit organizations as they struggled to regain control through local environmental management, rebuilding, and reducing crime. Social capital was also strengthened by using a local community health concern—that of childhood asthma. Efforts to reverse the downward spiral of urban decay from pariah land uses should be multi-faceted, spurred by local efforts that address local concerns. 相似文献
96.
97.
Joke Muys Bettina Blaumeiser Yves Jacquemyn Claude Bandelier Nathalie Brison Saskia Bulk Patrizia Chiarappa Winnie Courtens Anne De Leener Marjan De Rademaeker Julie Désir Anne Destrée Koenraad Devriendt Annelies Dheedene Annelies Fieuw Erik Fransen Jean-Stéphane Gatot Philip Holmgren Mauricette Jamar Sandra Janssens Kathelijn Keymolen Damien Lederer Björn Menten Marije Meuwissen Benoit Parmentier Bruno Pichon Sonia Rombout Yves Sznajer Ann Van Den Bogaert Kris Van Den Bogaert Olivier Vanakker Joris Vermeesch Katrien Janssens 《黑龙江环境通报》2018,38(13):1120-1128
98.
99.
100.