全文获取类型
收费全文 | 40691篇 |
免费 | 414篇 |
国内免费 | 331篇 |
专业分类
安全科学 | 1223篇 |
废物处理 | 1976篇 |
环保管理 | 5384篇 |
综合类 | 5720篇 |
基础理论 | 11128篇 |
环境理论 | 10篇 |
污染及防治 | 9873篇 |
评价与监测 | 2889篇 |
社会与环境 | 3012篇 |
灾害及防治 | 221篇 |
出版年
2023年 | 174篇 |
2022年 | 388篇 |
2021年 | 394篇 |
2020年 | 243篇 |
2019年 | 301篇 |
2018年 | 929篇 |
2017年 | 935篇 |
2016年 | 1205篇 |
2015年 | 678篇 |
2014年 | 1019篇 |
2013年 | 3027篇 |
2012年 | 1399篇 |
2011年 | 2206篇 |
2010年 | 1646篇 |
2009年 | 1753篇 |
2008年 | 2147篇 |
2007年 | 2227篇 |
2006年 | 1522篇 |
2005年 | 1363篇 |
2004年 | 1277篇 |
2003年 | 1326篇 |
2002年 | 1274篇 |
2001年 | 1449篇 |
2000年 | 1003篇 |
1999年 | 635篇 |
1998年 | 487篇 |
1997年 | 479篇 |
1996年 | 495篇 |
1995年 | 579篇 |
1994年 | 483篇 |
1993年 | 425篇 |
1992年 | 459篇 |
1991年 | 447篇 |
1990年 | 429篇 |
1989年 | 422篇 |
1988年 | 370篇 |
1987年 | 299篇 |
1986年 | 293篇 |
1985年 | 319篇 |
1984年 | 347篇 |
1983年 | 317篇 |
1982年 | 332篇 |
1981年 | 281篇 |
1980年 | 215篇 |
1979年 | 235篇 |
1978年 | 196篇 |
1977年 | 176篇 |
1975年 | 179篇 |
1973年 | 212篇 |
1972年 | 175篇 |
排序方式: 共有10000条查询结果,搜索用时 140 毫秒
151.
Taylor AJ 《Disasters》1986,10(1):70-73
This paper was prepared in 1978 on the basis of a review of sociological and anthropological fieldwork conducted up to that time. Although theoretical in presentation its conclusions are formulated in accordance with the author's own extensive observations of organizational response to natural disasters in developing countries, especially those having sudden onset. Practical implications for co-ordination agencies and pre-disaster training are drawn. 相似文献
152.
Horry Rosemary Booth Colin A. Mahamadu Abdul–Majeed Manu Patrick Georgakis Panos 《Environment, Development and Sustainability》2022,24(9):10585-10615
Environment, Development and Sustainability - Realisation of the sustainable development goals (SDGs) will provide improvements to people's lives and longevity of the planet. The architectural,... 相似文献
153.
Le Nguyen Truc Thinh Nguyen An Ha Nguyen Thi Vinh Tien Nguyen Dinh Lam Nguyen Duc Hong Nguyen Van Tuan Nguyen Tat Hanh Ta Van Khanh Nguyen Ngoc Thanh Nguyen Ngoc Hens Luc 《Environment, Development and Sustainability》2022,24(10):12427-12445
Environment, Development and Sustainability - The recent growth of agriculture, industry and urban areas in Vietnam requires a large amount of water consumption as a production factor. This paper... 相似文献
154.
Son Ngo Thanh Le Huong Hoang Loc Nguyen Duc Phuong Tran Trong 《Environment, Development and Sustainability》2022,24(3):3091-3109
Environment, Development and Sustainability - Land use and land cover (LULC) changes, climate variability and climate change (CC) contribute hydrological response in tropical catchments, but their... 相似文献
155.
Russian Journal of Ecology - Populations at the border of ranges are considered more vulnerable than those in the center. However, some recent reviews contradict this hypothesis. We have studied... 相似文献
156.
Russian Journal of Ecology - Abstract—We tested a hypothesis about the different abilities of alien and native plants to form arbuscular mycorrhizae. The studies were carried out in the... 相似文献
157.
158.
159.
160.
Shuyan Wang Lin Du Narcisse T. Tson Xiaotong Jiang Bo You Li Xu Zhaomin Yang Wenxing Wang 《环境科学学报(英文版)》2020,32(6):151-162
Methylglyoxal(CH_3COCHO,MG),which is one of the most abundant α-dicarbonyl compounds in the atmosphere,has been reported as a major source of secondary organic aerosol(SOA).In this work,the reaction of MG with hydroxyl radicals was studied in a 500 L smog chamber at(293±3) K,atmospheric pressure,(18±2)% relative humidity,and under different NOx and SO_2.Particle size distribution was measured by using a scanning mobility particle sizer(SMPS) and the results showed that the addition of SO_2 can promote SOA formation,while different NOx concentrations have different influences on SOA production.High NOx suppressed the SOA formation,whereas the particle mass concentration,particle number concentration and particle geometric mean diameter increased with the increasing NOx concentration at low NOx concentration in the presence of SO_2.In addition,the products of the OH-initiated oxidation of MG and the functional groups of the particle phase in the MG/OH/SO_2 and MG/OH/NOx/SO_2 reaction systems were detected by gas chromatography mass spectrometry(GC-MS) and attenuated total reflection fourier transformed infrared spectroscopy(ATR-FTIR) analysis.Two products,glyoxylic acid and oxalic acid,were detected by GC-MS.The mechanism of the reaction of MG and OH radicals that follows two main pathways,H atom abstraction and hydration,is proposed.Evidence is provided for the formation of organic nitrates and organic sulfate in particle phase from IR spectra.Incorporation of NOx and SO_2 influence suggested that SOA formation from anthropogenic hydrocarbons may be more efficient in polluted environment. 相似文献